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Game complexity

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126:, which is a subtree of the game tree, with each position labelled with "player A wins", "player B wins" or "drawn", if that position can be proved to have that value (assuming best play by both sides) by examining only other positions in the graph. (Terminal positions can be labelled directly; a position with player A to move can be labelled "player A wins" if any successor position is a win for A, or labelled "player B wins" if all successor positions are wins for B, or labelled "draw" if all successor positions are either drawn or wins for B. And correspondingly for positions with B to move.) 316:, a simple upper bound for the size of the state space is 3 = 19,683. (There are three states for each cell and nine cells.) This count includes many illegal positions, such as a position with five crosses and no noughts, or a position in which both players have a row of three. A more careful count, removing these illegal positions, gives 5,478. And when rotations and reflections of positions are considered identical, there are only 765 essentially different positions. 1709:. The bridge table can be regarded as having one slot for each player and trick to play a card in, which corresponds to board size 52. Game-tree complexity is a very weak upper bound: 13! to the power of 4 players regardless of legality. State-space complexity is for one given deal; likewise regardless of legality but with many transpositions eliminated. The last 4 plies are always forced moves with branching factor 1. 268:) is always lower-bounded by the logarithm of the asymptotic state-space complexity, since a solution algorithm must work for every possible state of the game. It will be upper-bounded by the complexity of any particular algorithm that works for the family of games. Similar remarks apply to the second-most commonly used complexity measure, the amount of 319:
To bound the game tree, there are 9 possible initial moves, 8 possible responses, and so on, so that there are at most 9! or 362,880 total games. However, games may take less than 9 moves to resolve, and an exact enumeration gives 255,168 possible games. When rotations and reflections of positions
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proportional to the game's tree-complexity, since it must explore the whole tree, and an amount of memory polynomial in the logarithm of the tree-complexity, since the algorithm must always store one node of the tree at each possible move-depth, and the number of nodes at the highest move-depth is
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game with two X and one O on the board, this position could have been reached in two different ways depending on where the first X was placed). An upper bound for the size of the game tree can sometimes be computed by simplifying the game in a way that only increases the size of the game tree (for
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to base 10. (In other words, the number of digits). All of the following numbers should be considered with caution: seemingly-minor changes to the rules of a game can change the numbers (which are often rough estimates anyway) by tremendous factors, which might easily be much greater than the
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board. (From the point of view of computational complexity a game on a fixed size of board is a finite problem that can be solved in O(1), for example by a look-up table from positions to the best move in each position.)
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used by the computation. It is not obvious that there is any lower bound on the space complexity for a typical game, because the algorithm need not store game states; however many games of interest are known to be
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For games where the number of moves is not limited (for example by the size of the board, or by a rule about repetition of position) the game tree is generally infinite.
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The game tree is typically vastly larger than the state space because the same positions can occur in many games by making moves in a different order (for example, in a
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will use both memory and time proportional to the state-space complexity as it must compute and record the correct move for each possible position.
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Lachmann, Michael; Moore, Cristopher; Rapaport, Ivan (2002). "Who wins Domineering on rectangular boards?". In Nowakowski, Richard (ed.).
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It is hard even to estimate the game-tree complexity, but for some games an approximation can be given by raising the game's average
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can often be computed by also counting (some) illegal positions, meaning positions that can never arise in the course of a game.
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IJCAI 2013, Proceedings of the 23rd International Joint Conference on Artificial Intelligence, Beijing, China, August 3-9, 2013
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GualĂ , Luciano; Leucci, Stefano; Natale, Emanuele (2014). "Bejeweled, Candy Crush and other match-three games are (NP-)hard".
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These measures involve understanding game positions, possible outcomes, and computation required for various game scenarios.
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More Games of No Chance: Proceedings of the 2nd Combinatorial Games Theory Workshop held in Berkeley, CA, July 24–28, 2000
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Stefan Reisch, Joel David Hamkins, and Phillipp Schlicht (2012). "The mate-in-n problem of infinite chess is decidable".
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of a game is the number of leaf nodes in the smallest decision tree that establishes the value of the initial position.
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decision tree that establishes the value of the initial position. A full-width tree includes all nodes at each depth.
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Computers and Games, Second International Conference, CG 2000, Hamamatsu, Japan, October 26-28, 2000, Revised Papers
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Shannon gave estimates of 10 and 10 respectively, smaller than the upper bound in the table, which is detailed in
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2014 IEEE Conference on Computational Intelligence and Games, CIG 2014, Dortmund, Germany, August 26-29, 2014
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Slany, Wolfgang (2000). "The complexity of graph Ramsey games". In Marsland, T. Anthony; Frank, Ian (eds.).
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Chang-Ming Xu; Ma, Z.M.; Jun-Jie Tao; Xin-He Xu (2009). "Enhancements of proof number search in connect6".
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Game-tree complexity (number of leaf nodes in the smallest full-width decision tree for initial position),
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Alex Churchill, Stella Biderman, and Austin Herrick (2020). "Magic: the Gathering is Turing Complete".
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Games of No Chance: Papers from the Combinatorial Games Workshop held in Berkeley, CA, July 11–21, 1994
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Kasai, Takumi; Adachi, Akeo; Iwata, Shigeki (1979). "Classes of pebble games and complete problems".
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H. Adachi; H. Kamekawa; S. Iwata (1987). "Shogi on n Ă— n board is complete in exponential time".
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of a game is the number of legal game positions reachable from the initial position of the game.
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E. Bonnet; F. Jamain; A. Saffidine (March 25, 2014). "Havannah and TwixT are PSPACE-complete".
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M.P.D. Schadd; M.H.M. Winands; J.W.H.M. Uiterwijk; H.J. van den Herik; M.H.J. Bergsma (2008).
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Decision complexity (number of leaf nodes in the smallest decision tree for initial position),
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is the total number of possible games that can be played: the number of leaf nodes in the
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Computational complexity (asymptotic difficulty of a game as it grows arbitrarily large).
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one is considering) algorithm for solving the game; the most common complexity measure (
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CDA Evans and Joel David Hamkins (2014). "Transfinite game values in infinite chess".
3104: 3087: 1946: 1929: 362:) by searching the entire game tree. This places it in the important complexity class 45:
State-space complexity (the number of legal game positions from the initial position),
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Stefan Reisch (1980). "Gobang ist PSPACE-vollständig (Gobang is PSPACE-complete)".
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Due to the large size of game complexities, this table gives the ceiling of their
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Donghwi Park (2015). "Space-state complexity of Korean chess and Chinese chess".
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The asymptotic complexity is defined by the most efficient (in terms of whatever
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Lokshtanov, Daniel; Subercaseaux, Bernardo (May 14, 2022). "Wordle is NP-hard".
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G.I. Bell (2009). "The Shortest Game of Chinese Checkers and Related Problems".
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This is an estimate of the number of positions one would have to evaluate in a
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Stefan Reisch (1981). "Hex ist PSPACE-vollständig (Hex is PSPACE-complete)".
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The size of the state space and game tree for chess were first estimated in
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Stella Biderman (2020). "Magic: the Gathering is as Hard as Arithmetic".
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Shi-Jim Yen, Jr-Chang Chen; Tai-Ning Yang; Shun-Chin Hsu (March 2004).
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so they can be made arbitrarily large, typically by playing them on an
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Monte-Carlo Search Techniques in the Modern Board Game Thurn and Taxis
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H. J. van den Herik; J. W. H. M. Uiterwijk; J. van Rijswijck (2002).
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Computer Games Workshop, Amsterdam, the Netherlands, 15-17 June 2007
2460:(Ph.D. thesis). Maastricht University, Maastricht, The Netherlands. 2341: 2176: 1765:(Ph.D. thesis). University of Limburg, Maastricht, The Netherlands. 4469: 3969: 3408: 3387: 3352: 2842: 2667: 1701:
Double dummy bridge (i.e., double dummy problems in the context of
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in a row. It is immediately clear that this game can be solved in
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The computational complexity of tic-tac-toe depends on how it is
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difficulty of a game as it grows arbitrarily large, expressed in
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example, by allowing illegal moves) until it becomes tractable.
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are considered the same, there are only 26,830 possible games.
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Proves completeness of the generalization to arbitrary graphs.
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Bonnet, Edouard; Jamain, Florian; Saffidine, Abdallah (2013).
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Hiroyuki Iida; Makoto Sakuta; Jeff Rollason (January 2002).
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J. M. Robson (1984). "N by N checkers is Exptime complete".
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Searching for Solutions in Games and Artificial Intelligence
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Kloetzer, Julien; Iida, Hiroyuki; Bouzy, Bruno (2007).
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Pushy Computing: Complexity Theory and the Game Abalone
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search to determine the value of the initial position.
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of a game is the number of leaf nodes in the smallest
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Information Processing; Proceedings of IFIP Congress
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The lower branching factor is for the second player.
2522: 2430: 3235:"Move Ranking and Evaluation in the Game of Arimaa" 3046:"A Knowledge-Based Approach of the Game of Amazons" 3065:(February 2, 2005). "Amazons is PSPACE-complete". 2986: 2750:"Practical issues in temporal difference learning" 2709:Hsieh, Ming Yu; Tsai, Shi-Chun (October 1, 2007). 2566: 2546: 2384: 2057: 210: 3021: 2614: 2450: 4548: 3217:"Analysis and Implementation of the Game Arimaa" 2961: 2793:International Computer Games Association Journal 2647: 2327: 2058:Jonathan Schaeffer; et al. (July 6, 2007). 350:board with winner being the first player to get 48:Game tree size (total number of possible games), 3380: 3143:(Thesis). Maastricht University. Archived from 2992: 2117:"Game over: Black to play and draw in checkers" 3214: 3037: 2996:Implementing a Computer Player for Carcassonne 2935: 2661: 2641: 2481: 2253: 2201:"On the complexity of trick-taking card games" 64: 3488: 3468:Computational Complexity of Games and Puzzles 3339: 3232: 3200:J. M. Robson (1983). "The complexity of Go". 2941: 2434:Analysis and Implementation of the Game OnTop 2424: 2267: 2265: 2156: 2154: 1923: 1921: 1919: 1917: 1915: 1913: 1878: 1836: 3366:: CS1 maint: multiple names: authors list ( 3331:: CS1 maint: multiple names: authors list ( 3300: 3259: 3250: 3199: 3167:This paper derives the bounds 48<log(log( 2835: 2670:2009 Chinese Control and Decision Conference 2651:Analysis and Implementation of the game Gipf 2516: 2256:"An Upper Bound on the Complexity of Tablut" 2160: 1874: 1872: 1870: 1868: 1752: 1748: 1746: 366:. With some more work it can be shown to be 3265: 3133: 3061: 2945:Txixt: Theory, Analysis, and Implementation 2474: 2444: 2247: 1744: 1742: 1740: 1738: 1736: 1734: 1732: 1730: 1728: 1726: 221: 3495: 3481: 3244: 3193: 3184: 3171:))<171 on the number of possible games 3127: 2955: 2881: 2875: 2831: 2829: 2779: 2777: 2487:"Programming a Computer for Playing Chess" 2363: 2262: 2211: 2151: 2009: 1910: 1830: 308:Example: tic-tac-toe (noughts and crosses) 3502: 3452:list of PSPACE-complete games and puzzles 3407: 3386: 3351: 3316: 3291: 3178: 3103: 3070: 2926: 2841: 2765: 2726: 2708: 2624: 2591: 2579:Journal of Combinatorial Theory, Series A 2407: 2323: 2321: 2285: 2271: 2114: 2083: 1945: 1865: 69: 3374: 1723: 120:The next two measures use the idea of a 3253:"A Look at the Arimaa Branching Factor" 3208: 2850: 2826: 2774: 2747: 2228:New Mathematics and Natural Computation 140: 101:rooted at the game's initial position. 81:When this is too hard to calculate, an 14: 4549: 3226: 2608: 2364:Iwata, Shigeki; Kasai, Takumi (1994). 2318: 129: 3476: 3447:list of NP-complete games and puzzles 3309:Conference on Computability in Europe 3161:John Tromp; Gunnar Farnebäck (2007). 3024:"The Monte-Carlo approach in Amazons" 2220:"Best Play in Fanorona leads to Draw" 1960: 1930:"Games solved: Now and in the future" 1893: 1628:Un­known, but mate-in-n is decidable 374:Complexities of some well-known games 3154: 2971:. Computer Science (B.Sc. thesis). 2899:"Creating a Havannah Playing Agent" 2896: 2554:chess requires time exponential in 1968:. In Nowakowski, Richard J. (ed.). 27:Notion in combinatorial game theory 24: 3544:First-player and second-player win 2856: 2528:"Computing a perfect strategy for 2000:See van den Herik et al for rules. 25: 4573: 3457: 1963:"Pentominoes: a first player win" 1809: 653:English draughts (8x8) (checkers) 327:. A natural generalization is to 115: 88: 3651:Coalition-proof Nash equilibrium 2657:(Thesis). Maastricht University. 2454:Informed Search in Complex Games 2012:"John's Connect Four Playground" 386:Note: ordered by game tree size 3395: 3279: 3112: 3079: 3055: 3006: 2914: 2890: 2748:Tesauro, Gerald (May 1, 1992). 2741: 2702: 2357: 2207:. IJCAI/AAAI. pp. 482–488. 2192: 2183: 2108: 2051: 2018: 2003: 1695: 3661:Evolutionarily stable strategy 3187:"Number of legal Go positions" 2526:; Lichtenstein, David (1981). 1994: 1954: 1887: 1803: 1779: 848:International draughts (10x10) 297:precisely the tree-complexity. 170:to the power of the number of 13: 1: 3589:Simultaneous action selection 3105:10.1016/S0004-3702(01)00157-6 3044:P. P. L. M. Hensgens (2001). 2962:Lisa Glendenning (May 2005). 2431:Robert Briesemeister (2009). 2203:. In Rossi, Francesca (ed.). 1947:10.1016/S0004-3702(01)00152-7 1810:T, Brian (October 20, 2018). 1716: 211:{\displaystyle GTC\geq b^{d}} 4521:List of games in game theory 3701:Quantal response equilibrium 3691:Perfect Bayesian equilibrium 3626:Bayes correlated equilibrium 3269:Competitive Play in Stratego 2882:Kopczynski, Jacob S (2014). 2715:Theoretical Computer Science 2593:10.1016/0097-3165(81)90016-9 2409:10.1016/0304-3975(94)90131-7 2396:Theoretical Computer Science 2115:Schaeffer, Jonathan (2007). 7: 3990:Optional prisoner's dilemma 3721:Self-confirming equilibrium 3420: 65:Measures of game complexity 10: 4578: 4455:Principal variation search 4171:Aumann's agreement theorem 3834:Strategy-stealing argument 3746:Trembling hand equilibrium 3676:Markov perfect equilibrium 3671:Mertens-stable equilibrium 2451:Mark H.M. Winands (2004). 1961:Orman, Hilarie K. (1996). 1812:"Btsan/generate_tictactoe" 1791:Mathematics Stack Exchange 1426:Generalization is unclear 1220:Generalization is unclear 758: 703:Generalization is unclear 557:Generalization is unclear 4557:Combinatorial game theory 4491:Combinatorial game theory 4478: 4437: 4219: 4163: 4150:Princess and monster game 3945: 3847: 3754: 3706:Quasi-perfect equilibrium 3631:Bayesian Nash equilibrium 3612: 3511: 2728:10.1016/j.tcs.2007.05.031 2678:10.1109/CCDC.2009.5191963 2648:Diederik Wentink (2001). 2547:{\displaystyle n\times n} 2392:board is PSPACE-complete" 2385:{\displaystyle n\times n} 2330:SIAM Journal on Computing 2241:10.1142/S1793005708001124 2164:SIAM Journal on Computing 33:Combinatorial game theory 4506:Evolutionary game theory 4239:Antoine Augustin Cournot 4125:Guess 2/3 of the average 3922:Strictly determined game 3716:Satisfaction equilibrium 3534:Escalation of commitment 2993:Cathleen Heyden (2009). 2973:University of New Mexico 2786:"Computer Chinese Chess" 2635:10.1109/CIG.2014.6932866 2366:"The Othello game on an 2189:See Allis 1994 for rules 1904:10.1007/3-540-45579-5_12 1688: 232:of a game describes the 229:computational complexity 222:Computational complexity 177:in an average game, or: 4511:Glossary of game theory 4110:Stackelberg competition 3736:Strong Nash equilibrium 3215:Christ-Jan Cox (2006). 3092:Artificial Intelligence 2886:(Thesis). Reed College. 2737:– via dl.acm.org. 2254:Andrea Galassi (2018). 2085:10.1126/science.1144079 1934:Artificial Intelligence 623:for certain dimensions 401:State-space complexity 4536:Tragedy of the commons 4516:List of game theorists 4496:Confrontation analysis 4206:Sprague–Grundy theorem 3726:Sequential equilibrium 3646:Correlated equilibrium 3233:David Jian Wu (2011). 2942:Kevin Moesker (2009). 2805:10.3233/ICG-2004-27102 2619:. IEEE. pp. 1–8. 2568: 2548: 2494:Philosophical Magazine 2386: 2304:10.1515/INTEG.2009.003 2138:10.3233/ICG-2007-30402 262:computational resource 240:or as membership in a 212: 76:state-space complexity 70:State-space complexity 4309:Jean-François Mertens 3275:(Thesis). Maastricht. 3251:Brian Haskin (2006). 3163:"Combinatorics of Go" 2569: 2549: 2500:(314). Archived from 2387: 1682:with parametization. 964:OnTop (2p base game) 411:Game-tree complexity 213: 4438:Search optimizations 4314:Jennifer Tour Chayes 4201:Revelation principle 4196:Purification theorem 4135:Nash bargaining game 4100:Bertrand competition 4085:El Farol Bar problem 4050:Electronic mail game 4015:Lewis signaling game 3559:Hierarchy of beliefs 3266:A.F.C. Arts (2010). 3134:F.C. Schadd (2009). 2558: 2532: 2524:Fraenkel, Aviezri S. 2370: 2060:"Checkers is Solved" 1634:Magic: The Gathering 1104:50-move drawing rule 421:Average game length 183: 147:game-tree complexity 141:Game-tree complexity 18:Game tree complexity 4486:Bounded rationality 4105:Cournot competition 4055:Rock paper scissors 4030:Battle of the sexes 4020:Volunteer's dilemma 3892:Perfect information 3819:Dominant strategies 3656:Epsilon-equilibrium 3539:Extensive-form game 3204:. pp. 413–417. 3185:John Tromp (2016). 3123:. J70-D: 1843–1852. 3033:. pp. 185–192. 2296:2008arXiv0803.1245B 2076:2007Sci...317.1518S 2070:(5844): 1518–1522. 2010:John Tromp (2010). 1021:(15x15, freestyle) 738:Double dummy bridge 135:Decision complexity 130:Decision complexity 4465:Paranoid algorithm 4445:Alpha–beta pruning 4324:John Maynard Smith 4155:Rendezvous problem 3995:Traveler's dilemma 3985:Gift-exchange game 3980:Prisoner's dilemma 3897:Large Poisson game 3864:Bargaining problem 3769:Backward induction 3741:Subgame perfection 3696:Proper equilibrium 3427:Go and mathematics 2965:Mastering Quoridor 2767:10.1007/BF00992697 2564: 2544: 2382: 1851:10.1007/bf00288536 1365:?, believed to be 1247:?, believed to be 301:Backward induction 208: 41:in several ways: 4544: 4543: 4450:Aspiration window 4419:Suzanne Scotchmer 4374:Oskar Morgenstern 4269:Donald B. Gillies 4211:Zermelo's theorem 4140:Induction puzzles 4095:Fair cake-cutting 4070:Public goods game 4000:Coordination game 3874:Intransitive game 3804:Forward induction 3686:Pareto efficiency 3666:Gibbs equilibrium 3636:Berge equilibrium 3584:Simultaneous game 2687:978-1-4244-2722-2 2567:{\displaystyle n} 1686: 1685: 795:Nine men's morris 431:Branching factor 16:(Redirected from 4569: 4531:Topological game 4526:No-win situation 4424:Thomas Schelling 4404:Robert B. Wilson 4364:Merrill M. Flood 4334:John von Neumann 4244:Ariel Rubinstein 4229:Albert W. Tucker 4080:War of attrition 4040:Matching pennies 3681:Nash equilibrium 3604:Mechanism design 3569:Normal-form game 3524:Cooperative game 3497: 3490: 3483: 3474: 3473: 3414: 3413: 3411: 3399: 3393: 3392: 3390: 3378: 3372: 3371: 3365: 3357: 3355: 3343: 3337: 3336: 3330: 3322: 3320: 3304: 3298: 3297: 3295: 3283: 3277: 3276: 3274: 3263: 3257: 3256: 3248: 3242: 3241: 3239: 3230: 3224: 3223: 3221: 3212: 3206: 3205: 3197: 3191: 3190: 3182: 3176: 3166: 3158: 3152: 3151: 3149: 3142: 3131: 3125: 3124: 3116: 3110: 3109: 3107: 3098:(1–2): 121–144. 3088:"Computer shogi" 3083: 3077: 3076: 3074: 3059: 3053: 3052: 3050: 3041: 3035: 3034: 3028: 3019: 3013: 3010: 3004: 3003: 3001: 2990: 2984: 2983: 2981: 2975:. Archived from 2970: 2959: 2953: 2952: 2950: 2939: 2933: 2932: 2930: 2918: 2912: 2911: 2909: 2908: 2903: 2894: 2888: 2887: 2879: 2873: 2872: 2870: 2869: 2863: 2857:Chorus, Pascal. 2854: 2848: 2847: 2845: 2833: 2824: 2823: 2821: 2815:. Archived from 2790: 2781: 2772: 2771: 2769: 2760:(3–4): 257–277. 2754:Machine Learning 2745: 2739: 2738: 2736: 2735: 2730: 2706: 2700: 2699: 2672:. p. 4525. 2665: 2659: 2658: 2656: 2645: 2639: 2638: 2628: 2612: 2606: 2605: 2595: 2573: 2571: 2570: 2565: 2553: 2551: 2550: 2545: 2520: 2514: 2508: 2506: 2491: 2478: 2472: 2471: 2459: 2448: 2442: 2441: 2439: 2428: 2422: 2421: 2411: 2391: 2389: 2388: 2383: 2361: 2355: 2353: 2325: 2316: 2315: 2289: 2269: 2260: 2259: 2251: 2245: 2244: 2224: 2215: 2209: 2208: 2196: 2190: 2187: 2181: 2180: 2158: 2149: 2148: 2146: 2140:. Archived from 2121: 2112: 2106: 2105: 2087: 2055: 2049: 2048: 2022: 2016: 2015: 2007: 2001: 1998: 1992: 1991: 1967: 1958: 1952: 1951: 1949: 1940:(1–2): 277–311. 1925: 1908: 1907: 1891: 1885: 1884: 1876: 1863: 1862: 1839:Acta Informatica 1834: 1828: 1827: 1825: 1824: 1807: 1801: 1800: 1798: 1797: 1783: 1777: 1776: 1764: 1750: 1710: 1699: 1539:EXPTIME-complete 1483:EXPTIME-complete 1367:EXPTIME-complete 1249:EXPTIME-complete 1100:EXPTIME-complete 906:Chinese checkers 877:Chinese checkers 870:EXPTIME-complete 759:PSPACE-complete 675:EXPTIME-complete 442:generalized game 438:Complexity class 389: 388: 294:computation time 290:minimax strategy 266:computation time 242:complexity class 217: 215: 214: 209: 207: 206: 165:branching factor 21: 4577: 4576: 4572: 4571: 4570: 4568: 4567: 4566: 4547: 4546: 4545: 4540: 4474: 4460:max^n algorithm 4433: 4429:William Vickrey 4389:Reinhard Selten 4344:Kenneth Binmore 4259:David K. Levine 4254:Daniel Kahneman 4221: 4215: 4191:Negamax theorem 4181:Minimax theorem 4159: 4120:Diner's dilemma 3975:All-pay auction 3941: 3927:Stochastic game 3879:Mean-field game 3850: 3843: 3814:Markov strategy 3750: 3616: 3608: 3579:Sequential game 3564:Information set 3549:Game complexity 3519:Congestion game 3507: 3501: 3460: 3423: 3418: 3417: 3400: 3396: 3379: 3375: 3359: 3358: 3344: 3340: 3324: 3323: 3305: 3301: 3284: 3280: 3272: 3264: 3260: 3249: 3245: 3237: 3231: 3227: 3219: 3213: 3209: 3198: 3194: 3183: 3179: 3159: 3155: 3147: 3140: 3132: 3128: 3117: 3113: 3084: 3080: 3060: 3056: 3048: 3042: 3038: 3026: 3020: 3016: 3011: 3007: 2999: 2991: 2987: 2979: 2968: 2960: 2956: 2948: 2940: 2936: 2919: 2915: 2906: 2904: 2901: 2895: 2891: 2880: 2876: 2867: 2865: 2861: 2855: 2851: 2834: 2827: 2819: 2788: 2782: 2775: 2746: 2742: 2733: 2731: 2721:(1–3): 88–100. 2707: 2703: 2688: 2666: 2662: 2654: 2646: 2642: 2613: 2609: 2559: 2556: 2555: 2533: 2530: 2529: 2521: 2517: 2504: 2489: 2479: 2475: 2468: 2457: 2449: 2445: 2437: 2429: 2425: 2371: 2368: 2367: 2362: 2358: 2342:10.1137/0208046 2326: 2319: 2270: 2263: 2252: 2248: 2222: 2216: 2212: 2197: 2193: 2188: 2184: 2177:10.1137/0213018 2159: 2152: 2144: 2119: 2113: 2109: 2056: 2052: 2037: 2023: 2019: 2008: 2004: 1999: 1995: 1980: 1965: 1959: 1955: 1926: 1911: 1892: 1888: 1877: 1866: 1835: 1831: 1822: 1820: 1808: 1804: 1795: 1793: 1785: 1784: 1780: 1773: 1762: 1751: 1724: 1719: 1714: 1713: 1707:computer bridge 1703:contract bridge 1700: 1696: 1691: 1680:PSPACE-complete 1490:Thurn and Taxis 1454:PSPACE-complete 1432:Amazons (10x10) 1406:(2p base game) 1311:PSPACE-complete 1192:PSPACE-complete 1071:PSPACE-complete 1042:PSPACE-complete 989:Lines of Action 958:PSPACE-complete 731:PSPACE-complete 500:PSPACE-complete 471:PSPACE-complete 383:numbers shown. 376: 368:PSPACE-complete 342:: played on an 310: 274:computer memory 224: 202: 198: 184: 181: 180: 143: 132: 118: 91: 72: 67: 39:game complexity 28: 23: 22: 15: 12: 11: 5: 4575: 4565: 4564: 4559: 4542: 4541: 4539: 4538: 4533: 4528: 4523: 4518: 4513: 4508: 4503: 4498: 4493: 4488: 4482: 4480: 4476: 4475: 4473: 4472: 4467: 4462: 4457: 4452: 4447: 4441: 4439: 4435: 4434: 4432: 4431: 4426: 4421: 4416: 4411: 4406: 4401: 4396: 4394:Robert Axelrod 4391: 4386: 4381: 4376: 4371: 4369:Olga Bondareva 4366: 4361: 4359:Melvin Dresher 4356: 4351: 4349:Leonid Hurwicz 4346: 4341: 4336: 4331: 4326: 4321: 4316: 4311: 4306: 4301: 4296: 4291: 4286: 4284:Harold W. Kuhn 4281: 4276: 4274:Drew Fudenberg 4271: 4266: 4264:David M. Kreps 4261: 4256: 4251: 4249:Claude Shannon 4246: 4241: 4236: 4231: 4225: 4223: 4217: 4216: 4214: 4213: 4208: 4203: 4198: 4193: 4188: 4186:Nash's theorem 4183: 4178: 4173: 4167: 4165: 4161: 4160: 4158: 4157: 4152: 4147: 4142: 4137: 4132: 4127: 4122: 4117: 4112: 4107: 4102: 4097: 4092: 4087: 4082: 4077: 4072: 4067: 4062: 4057: 4052: 4047: 4045:Ultimatum game 4042: 4037: 4032: 4027: 4025:Dollar auction 4022: 4017: 4012: 4010:Centipede game 4007: 4002: 3997: 3992: 3987: 3982: 3977: 3972: 3967: 3965:Infinite chess 3962: 3957: 3951: 3949: 3943: 3942: 3940: 3939: 3934: 3932:Symmetric game 3929: 3924: 3919: 3917:Signaling game 3914: 3912:Screening game 3909: 3904: 3902:Potential game 3899: 3894: 3889: 3881: 3876: 3871: 3866: 3861: 3855: 3853: 3845: 3844: 3842: 3841: 3836: 3831: 3829:Mixed strategy 3826: 3821: 3816: 3811: 3806: 3801: 3796: 3791: 3786: 3781: 3776: 3771: 3766: 3760: 3758: 3752: 3751: 3749: 3748: 3743: 3738: 3733: 3728: 3723: 3718: 3713: 3711:Risk dominance 3708: 3703: 3698: 3693: 3688: 3683: 3678: 3673: 3668: 3663: 3658: 3653: 3648: 3643: 3638: 3633: 3628: 3622: 3620: 3610: 3609: 3607: 3606: 3601: 3596: 3591: 3586: 3581: 3576: 3571: 3566: 3561: 3556: 3554:Graphical game 3551: 3546: 3541: 3536: 3531: 3526: 3521: 3515: 3513: 3509: 3508: 3500: 3499: 3492: 3485: 3477: 3471: 3470: 3464:David Eppstein 3459: 3458:External links 3456: 3455: 3454: 3449: 3444: 3442:Shannon number 3439: 3434: 3429: 3422: 3419: 3416: 3415: 3394: 3373: 3338: 3299: 3278: 3258: 3243: 3225: 3207: 3192: 3177: 3153: 3150:on 2021-01-14. 3126: 3111: 3078: 3054: 3036: 3014: 3005: 2985: 2982:on 2012-03-15. 2954: 2934: 2913: 2889: 2874: 2849: 2825: 2822:on 2007-06-14. 2773: 2740: 2701: 2686: 2660: 2640: 2607: 2586:(2): 199–214. 2563: 2543: 2540: 2537: 2515: 2511:Shannon number 2507:on 2010-07-06. 2483:Claude Shannon 2473: 2466: 2443: 2423: 2402:(2): 329–340. 2381: 2378: 2375: 2356: 2336:(4): 574–586. 2317: 2261: 2246: 2235:(3): 369–387. 2210: 2191: 2182: 2171:(2): 252–267. 2150: 2147:on 2016-04-03. 2132:(4): 187–197. 2107: 2050: 2035: 2017: 2002: 1993: 1978: 1953: 1909: 1886: 1883:(15): 167–191. 1864: 1829: 1802: 1778: 1771: 1721: 1720: 1718: 1715: 1712: 1711: 1693: 1692: 1690: 1687: 1684: 1683: 1673: 1671: 1669: 1666: 1664: 1661: 1658: 1652: 1651: 1648: 1646: 1644: 1642: 1640: 1638: 1636: 1630: 1629: 1626: 1624: 1621: 1618: 1615: 1612: 1609: 1607:Infinite chess 1603: 1602: 1600: 1598: 1595: 1592: 1589: 1586: 1583: 1577: 1576: 1570: 1568: 1565: 1562: 1559: 1556: 1553: 1547: 1546: 1536: 1534: 1531: 1528: 1525: 1522: 1519: 1513: 1512: 1510: 1508: 1505: 1502: 1499: 1496: 1493: 1486: 1485: 1480: 1478: 1475: 1472: 1469: 1466: 1463: 1457: 1456: 1451: 1449: 1446: 1443: 1440: 1437: 1434: 1428: 1427: 1424: 1422: 1419: 1416: 1413: 1410: 1407: 1400: 1399: 1393: 1391: 1388: 1385: 1382: 1379: 1376: 1370: 1369: 1363: 1361: 1358: 1355: 1352: 1349: 1346: 1340: 1339: 1337: 1335: 1332: 1329: 1326: 1323: 1320: 1314: 1313: 1308: 1306: 1303: 1300: 1297: 1294: 1291: 1285: 1284: 1275: 1273: 1270: 1267: 1264: 1261: 1258: 1252: 1251: 1245: 1243: 1240: 1237: 1234: 1231: 1228: 1222: 1221: 1218: 1216: 1213: 1210: 1207: 1204: 1201: 1195: 1194: 1189: 1187: 1184: 1181: 1178: 1175: 1172: 1166: 1165: 1163: 1161: 1158: 1155: 1152: 1149: 1146: 1140: 1139: 1134: 1132: 1129: 1127: 1125: 1122: 1119: 1108: 1107: 1097: 1095: 1092: 1089: 1086: 1083: 1080: 1074: 1073: 1068: 1066: 1063: 1060: 1057: 1054: 1051: 1045: 1044: 1039: 1037: 1034: 1031: 1028: 1025: 1022: 1015: 1014: 1008: 1006: 1003: 1000: 997: 994: 991: 985: 984: 982: 980: 977: 974: 971: 968: 965: 961: 960: 955: 953: 950: 947: 944: 941: 938: 931: 930: 924: 922: 919: 917: 915: 912: 909: 902: 901: 895: 893: 890: 888: 886: 883: 880: 873: 872: 867: 865: 862: 859: 856: 853: 850: 844: 843: 841: 839: 837: 835: 833: 830: 827: 821: 820: 814: 812: 809: 806: 803: 800: 797: 791: 790: 784: 782: 779: 776: 773: 770: 767: 761: 760: 757: 755: 752: 749: 746: 743: 740: 734: 733: 728: 726: 723: 720: 717: 714: 711: 705: 704: 701: 699: 696: 693: 690: 687: 684: 678: 677: 672: 670: 667: 664: 661: 658: 655: 649: 648: 646: 644: 642: 640: 637: 634: 631: 625: 624: 613: 611: 608: 605: 602: 599: 596: 589: 588: 582: 580: 577: 574: 571: 568: 565: 559: 558: 555: 553: 550: 548: 545: 542: 539: 533: 532: 526: 524: 521: 518: 515: 512: 509: 503: 502: 497: 495: 492: 489: 486: 483: 480: 474: 473: 468: 466: 463: 460: 457: 454: 451: 445: 444: 435: 432: 429: 419: 409: 399: 393: 375: 372: 309: 306: 305: 304: 298: 238:big O notation 223: 220: 205: 201: 197: 194: 191: 188: 142: 139: 131: 128: 117: 116:Decision trees 114: 95:game tree size 90: 89:Game tree size 87: 71: 68: 66: 63: 59: 58: 55: 52: 49: 46: 26: 9: 6: 4: 3: 2: 4574: 4563: 4560: 4558: 4555: 4554: 4552: 4537: 4534: 4532: 4529: 4527: 4524: 4522: 4519: 4517: 4514: 4512: 4509: 4507: 4504: 4502: 4499: 4497: 4494: 4492: 4489: 4487: 4484: 4483: 4481: 4479:Miscellaneous 4477: 4471: 4468: 4466: 4463: 4461: 4458: 4456: 4453: 4451: 4448: 4446: 4443: 4442: 4440: 4436: 4430: 4427: 4425: 4422: 4420: 4417: 4415: 4414:Samuel Bowles 4412: 4410: 4409:Roger Myerson 4407: 4405: 4402: 4400: 4399:Robert Aumann 4397: 4395: 4392: 4390: 4387: 4385: 4382: 4380: 4377: 4375: 4372: 4370: 4367: 4365: 4362: 4360: 4357: 4355: 4354:Lloyd Shapley 4352: 4350: 4347: 4345: 4342: 4340: 4339:Kenneth Arrow 4337: 4335: 4332: 4330: 4327: 4325: 4322: 4320: 4319:John Harsanyi 4317: 4315: 4312: 4310: 4307: 4305: 4302: 4300: 4297: 4295: 4292: 4290: 4289:Herbert Simon 4287: 4285: 4282: 4280: 4277: 4275: 4272: 4270: 4267: 4265: 4262: 4260: 4257: 4255: 4252: 4250: 4247: 4245: 4242: 4240: 4237: 4235: 4232: 4230: 4227: 4226: 4224: 4218: 4212: 4209: 4207: 4204: 4202: 4199: 4197: 4194: 4192: 4189: 4187: 4184: 4182: 4179: 4177: 4174: 4172: 4169: 4168: 4166: 4162: 4156: 4153: 4151: 4148: 4146: 4143: 4141: 4138: 4136: 4133: 4131: 4128: 4126: 4123: 4121: 4118: 4116: 4113: 4111: 4108: 4106: 4103: 4101: 4098: 4096: 4093: 4091: 4090:Fair division 4088: 4086: 4083: 4081: 4078: 4076: 4073: 4071: 4068: 4066: 4065:Dictator game 4063: 4061: 4058: 4056: 4053: 4051: 4048: 4046: 4043: 4041: 4038: 4036: 4033: 4031: 4028: 4026: 4023: 4021: 4018: 4016: 4013: 4011: 4008: 4006: 4003: 4001: 3998: 3996: 3993: 3991: 3988: 3986: 3983: 3981: 3978: 3976: 3973: 3971: 3968: 3966: 3963: 3961: 3958: 3956: 3953: 3952: 3950: 3948: 3944: 3938: 3937:Zero-sum game 3935: 3933: 3930: 3928: 3925: 3923: 3920: 3918: 3915: 3913: 3910: 3908: 3907:Repeated game 3905: 3903: 3900: 3898: 3895: 3893: 3890: 3888: 3886: 3882: 3880: 3877: 3875: 3872: 3870: 3867: 3865: 3862: 3860: 3857: 3856: 3854: 3852: 3846: 3840: 3837: 3835: 3832: 3830: 3827: 3825: 3824:Pure strategy 3822: 3820: 3817: 3815: 3812: 3810: 3807: 3805: 3802: 3800: 3797: 3795: 3792: 3790: 3789:De-escalation 3787: 3785: 3782: 3780: 3777: 3775: 3772: 3770: 3767: 3765: 3762: 3761: 3759: 3757: 3753: 3747: 3744: 3742: 3739: 3737: 3734: 3732: 3731:Shapley value 3729: 3727: 3724: 3722: 3719: 3717: 3714: 3712: 3709: 3707: 3704: 3702: 3699: 3697: 3694: 3692: 3689: 3687: 3684: 3682: 3679: 3677: 3674: 3672: 3669: 3667: 3664: 3662: 3659: 3657: 3654: 3652: 3649: 3647: 3644: 3642: 3639: 3637: 3634: 3632: 3629: 3627: 3624: 3623: 3621: 3619: 3615: 3611: 3605: 3602: 3600: 3599:Succinct game 3597: 3595: 3592: 3590: 3587: 3585: 3582: 3580: 3577: 3575: 3572: 3570: 3567: 3565: 3562: 3560: 3557: 3555: 3552: 3550: 3547: 3545: 3542: 3540: 3537: 3535: 3532: 3530: 3527: 3525: 3522: 3520: 3517: 3516: 3514: 3510: 3506: 3498: 3493: 3491: 3486: 3484: 3479: 3478: 3475: 3469: 3465: 3462: 3461: 3453: 3450: 3448: 3445: 3443: 3440: 3438: 3437:Solving chess 3435: 3433: 3430: 3428: 3425: 3424: 3410: 3405: 3398: 3389: 3384: 3377: 3369: 3363: 3354: 3349: 3342: 3334: 3328: 3319: 3314: 3310: 3303: 3294: 3289: 3282: 3271: 3270: 3262: 3254: 3247: 3236: 3229: 3218: 3211: 3203: 3196: 3188: 3181: 3174: 3170: 3164: 3157: 3146: 3139: 3138: 3130: 3122: 3115: 3106: 3101: 3097: 3093: 3089: 3082: 3073: 3072:cs.CC/0502013 3068: 3064: 3058: 3047: 3040: 3032: 3025: 3018: 3009: 2998: 2997: 2989: 2978: 2974: 2967: 2966: 2958: 2947: 2946: 2938: 2929: 2924: 2917: 2900: 2893: 2885: 2878: 2860: 2853: 2844: 2839: 2832: 2830: 2818: 2814: 2810: 2806: 2802: 2798: 2794: 2787: 2780: 2778: 2768: 2763: 2759: 2755: 2751: 2744: 2729: 2724: 2720: 2716: 2712: 2705: 2697: 2693: 2689: 2683: 2679: 2675: 2671: 2664: 2653: 2652: 2644: 2636: 2632: 2627: 2622: 2618: 2611: 2603: 2599: 2594: 2589: 2585: 2581: 2580: 2575: 2561: 2541: 2538: 2535: 2525: 2519: 2512: 2503: 2499: 2495: 2488: 2484: 2477: 2469: 2467:90-5278-429-9 2463: 2456: 2455: 2447: 2436: 2435: 2427: 2419: 2415: 2410: 2405: 2401: 2397: 2393: 2379: 2376: 2373: 2360: 2351: 2347: 2343: 2339: 2335: 2331: 2324: 2322: 2313: 2309: 2305: 2301: 2297: 2293: 2288: 2283: 2279: 2275: 2268: 2266: 2257: 2250: 2242: 2238: 2234: 2230: 2229: 2221: 2214: 2206: 2202: 2195: 2186: 2178: 2174: 2170: 2166: 2165: 2157: 2155: 2143: 2139: 2135: 2131: 2127: 2126: 2118: 2111: 2103: 2099: 2095: 2091: 2086: 2081: 2077: 2073: 2069: 2065: 2061: 2054: 2046: 2042: 2038: 2036:0-521-80832-4 2032: 2028: 2021: 2013: 2006: 1997: 1989: 1985: 1981: 1979:0-521-57411-0 1975: 1971: 1964: 1957: 1948: 1943: 1939: 1935: 1931: 1924: 1922: 1920: 1918: 1916: 1914: 1905: 1901: 1897: 1890: 1882: 1875: 1873: 1871: 1869: 1860: 1856: 1852: 1848: 1844: 1840: 1833: 1819: 1818: 1813: 1806: 1792: 1788: 1782: 1774: 1772:90-900748-8-0 1768: 1761: 1760: 1755: 1749: 1747: 1745: 1743: 1741: 1739: 1737: 1735: 1733: 1731: 1729: 1727: 1722: 1708: 1704: 1698: 1694: 1681: 1678:, unknown if 1677: 1674: 1672: 1670: 1667: 1665: 1662: 1659: 1657: 1654: 1653: 1649: 1647: 1645: 1643: 1641: 1639: 1637: 1635: 1632: 1631: 1627: 1625: 1622: 1619: 1616: 1613: 1610: 1608: 1605: 1604: 1601: 1599: 1596: 1593: 1590: 1587: 1584: 1582: 1579: 1578: 1575: 1571: 1569: 1566: 1563: 1560: 1557: 1554: 1552: 1549: 1548: 1544: 1541:(without the 1540: 1537: 1535: 1532: 1529: 1526: 1523: 1520: 1518: 1515: 1514: 1511: 1509: 1506: 1503: 1500: 1497: 1494: 1491: 1488: 1487: 1484: 1481: 1479: 1476: 1473: 1470: 1467: 1464: 1462: 1459: 1458: 1455: 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IEICE 3120: 3114: 3095: 3091: 3081: 3057: 3039: 3030: 3017: 3008: 2995: 2988: 2977:the original 2964: 2957: 2944: 2937: 2916: 2905:. Retrieved 2897:Joosten, B. 2892: 2883: 2877: 2866:. Retrieved 2852: 2817:the original 2796: 2792: 2757: 2753: 2743: 2732:. Retrieved 2718: 2714: 2704: 2669: 2663: 2650: 2643: 2616: 2610: 2583: 2577: 2518: 2502:the original 2497: 2493: 2476: 2453: 2446: 2433: 2426: 2399: 2395: 2359: 2333: 2329: 2277: 2273: 2249: 2232: 2226: 2213: 2204: 2194: 2185: 2168: 2162: 2142:the original 2129: 2125:ICGA Journal 2123: 2110: 2067: 2063: 2053: 2026: 2020: 2005: 1996: 1969: 1956: 1937: 1933: 1895: 1889: 1880: 1845:(1): 59–66. 1842: 1838: 1832: 1821:. Retrieved 1815: 1805: 1794:. 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Hearn 2799:(1): 3–18. 1881:Acta Inform 1492:(2 player) 1448:374 or 299 1404:Carcassonne 1278:PSPACE-hard 1116:Candy Crush 1049:Hex (11x11) 929:-complete 900:-complete 593:Domineering 507:Pentominoes 449:Tic-tac-toe 395:Board size 325:generalized 314:tic-tac-toe 287:depth-first 279:PSPACE-hard 246:generalized 106:tic-tac-toe 83:upper bound 4551:Categories 4145:Trust game 4130:Kuhn poker 3799:Escalation 3794:Deterrence 3784:Cheap talk 3756:Strategies 3574:Preference 3503:Topics of 3409:2203.16713 3388:2003.05119 3362:cite arXiv 3353:1904.09828 2907:2012-03-29 2868:2012-03-29 2843:1507.06401 2734:2018-04-12 1823:2020-04-08 1796:2020-04-08 1717:References 1572:?, but in 1517:Go (19x19) 1395:?, but in 1199:Backgammon 1010:?, but in 937:(Othello) 816:?, but in 786:?, but in 615:?, but in 584:?, but in 528:?, but in 234:asymptotic 151:full-width 4329:John Nash 4035:Stag hunt 3779:Collusion 3318:1201.5597 3311:: 78–88. 3293:1302.4377 2928:1403.6518 2626:1403.5830 2539:× 2377:× 2287:0803.1245 1623:infinite 1620:infinite 1617:infinite 1614:infinite 1611:infinite 1280:, and in 1112:Bejeweled 1102:(without 908:(6 sets) 879:(2 sets) 660:20 or 18 380:logarithm 292:will use 196:≥ 99:game tree 4470:Lazy SMP 4164:Theorems 4115:Deadlock 3970:Checkers 3851:of games 3618:concepts 3421:See also 2813:10336286 2696:20960281 2485:(1950). 2312:17141575 2274:Integers 2102:10274228 2094:17641166 1859:21455572 1756:(1994). 1650:AH-hard 1581:Stratego 1374:Quoridor 1289:Havannah 1170:Connect6 765:Fanorona 595:(8 Ă— 8) 36:measures 4222:figures 4005:Chicken 3859:Auction 3849:Classes 2602:0629595 2418:1256205 2350:0573848 2292:Bibcode 2072:Bibcode 2064:Science 2045:1973019 1988:1427975 1676:NP-hard 1663:12,972 1597:21.739 1574:EXPTIME 1412:>40 1282:EXPTIME 1256:Abalone 1226:Xiangqi 1137:NP-hard 1124:<50 1012:EXPTIME 935:Reversi 927:EXPTIME 898:EXPTIME 818:EXPTIME 788:EXPTIME 748:<40 745:<17 629:Congkak 158:minimax 2811:  2694:  2684:  2600:  2464:  2416:  2348:  2310:  2100:  2092:  2043:  2033:  1986:  1976:  1857:  1817:GitHub 1769:  1656:Wordle 1567:17281 1551:Arimaa 1397:PSPACE 1344:Janggi 1186:46000 1118:(8x8) 1019:Gomoku 979:23.77 825:Tablut 617:PSPACE 586:PSPACE 530:PSPACE 364:PSPACE 356:DSPACE 340:-games 3960:Chess 3947:Games 3404:arXiv 3383:arXiv 3348:arXiv 3313:arXiv 3288:arXiv 3273:(PDF) 3238:(PDF) 3220:(PDF) 3148:(PDF) 3141:(PDF) 3067:arXiv 3049:(PDF) 3027:(PDF) 3000:(PDF) 2980:(PDF) 2969:(PDF) 2949:(PDF) 2923:arXiv 2902:(PDF) 2862:(PDF) 2838:arXiv 2820:(PDF) 2809:S2CID 2789:(PDF) 2692:S2CID 2655:(PDF) 2621:arXiv 2505:(PDF) 2490:(PDF) 2458:(PDF) 2438:(PDF) 2308:S2CID 2282:arXiv 2223:(PDF) 2145:(PDF) 2120:(PDF) 2098:S2CID 1966:(PDF) 1855:S2CID 1763:(PDF) 1689:Notes 1461:Shogi 1318:Twixt 1160:29.3 1078:Chess 742:(52) 725:54.2 709:Qubic 682:Awari 619:; in 537:Kalah 425:plies 392:Game 270:space 172:plies 3641:Core 3368:link 3333:link 2682:ISBN 2462:ISBN 2090:PMID 2031:ISBN 1974:ISBN 1767:ISBN 1594:381 1591:535 1588:115 1561:402 1533:250 1530:150 1527:360 1524:170 1521:361 1507:879 1501:240 1474:115 1471:226 1442:212 1436:100 1415:195 1384:162 1357:100 1354:160 1334:452 1328:159 1325:140 1322:572 1305:240 1299:157 1296:127 1293:271 1266:154 1236:150 1215:250 1209:144 1180:140 1177:172 1174:361 1154:132 1144:GIPF 1114:and 1088:123 1053:121 1036:210 1027:105 1024:225 921:600 911:121 892:180 882:121 754:5.6 698:3.5 669:2.8 494:3.7 434:Ref 413:(as 403:(as 312:For 285:The 252:-by- 226:The 145:The 93:The 74:The 4220:Key 3466:'s 3100:doi 3096:134 2801:doi 2762:doi 2723:doi 2719:385 2674:doi 2631:doi 2588:doi 2404:doi 2400:123 2338:doi 2300:doi 2237:doi 2173:doi 2134:doi 2080:doi 2068:317 1942:doi 1938:134 1900:doi 1847:doi 1585:92 1564:92 1558:43 1555:64 1504:56 1498:66 1495:33 1477:92 1468:71 1465:81 1445:84 1439:40 1421:55 1418:71 1409:72 1390:60 1387:91 1381:42 1378:81 1360:40 1351:44 1348:90 1331:60 1302:66 1272:60 1269:87 1263:25 1260:61 1242:38 1239:95 1233:40 1230:90 1212:55 1206:20 1203:28 1183:30 1157:90 1151:25 1148:37 1131:70 1121:64 1094:35 1091:70 1085:44 1082:64 1065:96 1062:50 1059:98 1056:57 1033:30 1030:70 1005:29 1002:44 999:64 996:23 993:64 976:31 973:62 970:88 967:72 952:10 949:58 946:58 943:28 940:64 914:78 885:23 861:90 858:54 855:30 852:50 832:27 829:81 811:10 808:50 805:50 802:10 799:24 781:11 778:44 775:46 772:21 769:45 751:52 722:20 719:34 716:30 713:64 695:60 692:32 689:12 686:12 666:70 663:40 657:32 639:33 636:15 633:14 607:30 604:27 601:15 598:64 576:36 573:21 570:13 567:42 552:50 547:18 544:13 541:14 523:75 520:10 517:18 514:12 511:64 491:14 482:15 478:Sim 415:log 405:log 346:by 272:or 4553:: 3955:Go 3364:}} 3360:{{ 3329:}} 3325:{{ 3094:. 3090:. 3029:. 2828:^ 2807:. 2797:27 2795:. 2791:. 2776:^ 2756:. 2752:. 2717:. 2713:. 2690:. 2680:. 2629:. 2598:MR 2596:. 2584:31 2582:. 2576:. 2498:41 2496:. 2492:. 2414:MR 2412:. 2398:. 2394:. 2346:MR 2344:. 2332:. 2320:^ 2306:. 2298:. 2290:. 2280:. 2276:. 2264:^ 2231:. 2225:. 2169:13 2167:. 2153:^ 2130:30 2128:. 2122:. 2096:. 2088:. 2078:. 2066:. 2062:. 2041:MR 2039:. 1984:MR 1982:. 1936:. 1932:. 1912:^ 1867:^ 1853:. 1843:13 1841:. 1814:. 1789:. 1725:^ 1668:6 1660:5 1545:) 1106:) 864:4 610:8 579:4 488:8 485:3 465:4 462:9 459:5 456:3 453:9 427:) 370:. 360:mn 218:. 3885:n 3496:e 3489:t 3482:v 3412:. 3406:: 3391:. 3385:: 3370:) 3356:. 3350:: 3335:) 3321:. 3315:: 3296:. 3290:: 3255:. 3240:. 3222:. 3189:. 3175:. 3173:N 3169:N 3165:. 3108:. 3102:: 3075:. 3069:: 2931:. 2925:: 2910:. 2871:. 2846:. 2840:: 2803:: 2770:. 2764:: 2758:8 2725:: 2698:. 2676:: 2637:. 2633:: 2623:: 2604:. 2590:: 2574:" 2562:n 2542:n 2536:n 2513:. 2470:. 2420:. 2406:: 2380:n 2374:n 2352:. 2340:: 2334:8 2314:. 2302:: 2294:: 2284:: 2278:9 2258:. 2243:. 2239:: 2233:4 2179:. 2175:: 2136:: 2104:. 2082:: 2074:: 2047:. 2014:. 1990:. 1950:. 1944:: 1906:. 1902:: 1861:. 1849:: 1826:. 1799:. 1775:. 621:P 423:( 358:( 352:k 348:n 344:m 338:k 336:, 334:n 332:, 330:m 254:n 250:n 204:d 200:b 193:C 190:T 187:G 175:d 168:b 20:)

Index

Game tree complexity
Combinatorial game theory
measures
upper bound
game tree
tic-tac-toe
decision tree
minimax
branching factor
plies
computational complexity
asymptotic
big O notation
complexity class
generalized
computational resource
computation time
space
computer memory
PSPACE-hard
depth-first
minimax strategy
computation time
Backward induction
tic-tac-toe
generalized
m,n,k-games
DSPACE
PSPACE
PSPACE-complete

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