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Chess is a recreational and competitive game played between two players. The current form of Chess (sometimes called Western chess or international chess) has an international pedigree which evolved from similar, much older games in India and Persia. The modern form of the game emerged in Southern Europe during the second half of the 15th century. Today, chess is one of the world's most popular games, played by millions of people worldwide at home, in clubs, online, by correspondence, and in tournaments.

The game is played on a square chequered chessboard with 64 squares arranged in an eight-by-eight square. At the start, each player (one controlling the white pieces, the other controlling the black pieces) controls sixteen pieces: one king, one queen, two rooks, two knights, two bishops, and eight pawns. The object of the game is to checkmate the opponent's king, whereby the king is under immediate attack (in "check") and there is no way to remove it from attack on the next move.

The tradition of organized competitive chess started in the sixteenth century and has developed extensively. Chess today is a recognized sport of the International Olympic Committee. The first official World Chess Champion, Wilhelm Steinitz, claimed his title in 1886; Norwegian Grandmaster Magnus Carlsen is the current World Champion. Theoreticians have developed extensive chess strategies and tactics since the game's inception. Aspects of art are found in chess composition.

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An endgame tablebase is a computerized database of all chess positions within certain chess endgames. The tablebase reveals the game-theoretical value of each position (win, loss, or draw), and how many moves it will take to achieve that result with perfect play. Thus, the tablebase acts as an oracle, always providing the optimal moves for both White and Black.

Tablebases are generated by retrograde analysis, working backwards from a checkmated or stalemated position. Tablebases have solved chess for every position with six or fewer pieces (including the two kings). The results of the solution have profoundly advanced the chess community's understanding of endgame theory. Some positions which humans had analyzed as draws were proved to be winnable; the tablebase could see a mate in 100 moves or more, far beyond the horizon of both humans and computers. Tablebases have enhanced competitive play and facilitated the composition of chess endgame studies. They provide a powerful analytical tool, enabling students of chess to discover its deepest secrets.

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Featured articles	Good articles
Chess	Alekhine, Alexander	Fischer, Bobby
First-move advantage in chess	Anderssen, Adolf	Lasker, Emanuel
Gossip, George H. D.	Bindrich, Falko	Milner-Barry, Stuart
The Turk	Budapest Gambit	Modern Benoni
	Bughouse chess	Nadanian, Ashot
	Carlsen, Magnus	Rules of chess
	Chess in Armenia	Staunton, Howard
	En passant	Steinitz, Wilhelm
	Endgame tablebase	World Chess Championship 1972

Lua error in package.lua at line 80: module 'Module:Box-header/colours' not found. For chess news, see 2015 in sports, the 2015 in chess category, the current sports events portal, or the Wikinews sports portal. Below is the FIDE rating list of the top 20 players as of May 2015.

Rank	Player	Rating
1	Magnus Carlsen	2876
2	Viswanathan Anand	2804
3	Fabiano Caruana	2803
4	Hikaru Nakamura	2799
5	Veselin Topalov	2798
6	Alexander Grischuk	2780
7	Wesley So	2778
8	Vladimir Kramnik	2777
9	Anish Giri	2776
10	Levon Aronian	2776
11	Ding Liren	2757
12	Maxime Vachier-Lagrave	2754
13	Sergey Karjakin	2753
14	David Navara	2751
15	Evgeny Tomashevsky	2749
16	Li Chao	2748
17	Radosław Wojtaszek	2746
18	Boris Gelfand	2744
19	Michael Adams	2740
20	Dmitry Jakovenko	2738

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...that Swiss Grandmaster Viktor Korchnoi won four Soviet Union national championships, two Candidates tournaments, and six Chess Olympiad team gold medals and qualified twice to play for the world championship but never earned the world title, having fallen by a combined twelve games to seven to Soviet Grandmaster Anatoly Karpov?
...that Beersheba, situated in the Negev desert in Israel, is home to eight grandmasters and, with one such player for every 22,875 residents, has the greatest concentration of grandmasters of any world city?
...that Indian Koneru Humpy, the youngest-ever female Grandmaster, was given the forename Hampi at her birth but was subsequently given the more Russian-sounding name Humpy by her father?