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Exchange Sacrifice
In chess, the exchange is a situation in which one player Exchange (chess), exchanges a (i.e. a Bishop (chess), bishop or Knight (chess), knight) for a Rook (chess), rook. The side which wins the rook is said to have ''won the exchange'', while the other player has ''lost the exchange'', since the rook is usually Chess piece relative value, more valuable. Alternatively, the side having a rook for a minor piece is said to be ''up the exchange'', and the other player is ''down the exchange''. The opposing captures often happen on consecutive moves, although this is not strictly necessary. It is generally detrimental to lose the exchange, although occasionally one may find reason to purposely do so; the result is an #The exchange sacrifice, ''exchange sacrifice'' (see below). The #Minor exchange, ''minor exchange'' is an uncommon term for the exchange of a bishop and knight. "The exchange" differs from the more general "Exchange (chess), exchange" or "an exchange", which refers to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chess
Chess is a board game for two players, called White and Black, each controlling an army of chess pieces in their color, with the objective to checkmate the opponent's king. It is sometimes called international chess or Western chess to distinguish it from related games, such as xiangqi (Chinese chess) and shogi (Japanese chess). The recorded history of chess goes back at least to the emergence of a similar game, chaturanga, in seventh-century India. The rules of chess as we know them today emerged in Europe at the end of the 15th century, with standardization and universal acceptance by the end of the 19th century. Today, chess is one of the world's most popular games, played by millions of people worldwide. Chess is an abstract strategy game that involves no hidden information and no use of dice or cards. It is played on a chessboard with 64 squares arranged in an eight-by-eight grid. At the start, each player controls sixteen pieces: one king, one queen, two rooks, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
José Capablanca
José is a predominantly Spanish and Portuguese form of the given name Joseph. While spelled alike, this name is pronounced differently in each language: Spanish ; Portuguese (or ). In French, the name ''José'', pronounced , is an old vernacular form of Joseph, which is also in current usage as a given name. José is also commonly used as part of masculine name composites, such as José Manuel, José Maria or Antonio José, and also in female name composites like Maria José or Marie-José. The feminine written form is ''Josée'' as in French. In Netherlandic Dutch, however, ''José'' is a feminine given name and is pronounced ; it may occur as part of name composites like Marie-José or as a feminine first name in its own right; it can also be short for the name ''Josina'' and even a Dutch hypocorism of the name ''Johanna''. In England, Jose is originally a Romano-Celtic surname, and people with this family name can usually be found in, or traced to, the English county of C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Connected Pawns
In chess, connected pawns are two or more pawns of the same color on adjacent , as distinct from isolated pawns. These pawns are instrumental in creating pawn structure because, when diagonally adjacent, like the two rightmost white pawns, they form a , a chain where the one behind protects the one in front. When attacking these chains, the weak spot is the backmost pawn because it is not protected by any other pawn. Discussion Connected pawns that are both passed, i.e., without any enemy pawns in front of them on the same file or adjacent files, are referred to as connected passed pawns. Such pawns can be very strong in the endgame, especially if supported by other pieces. Often the opponent must sacrifice to prevent one of the pawns from promoting. Connected passed pawns are usually superior to other passed pawns. An exception is in an opposite-colored bishops endgame with a bishop and two pawns versus a bishop on the opposite color. If the pawns are connected and not bey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sicilian Defence
The Sicilian Defence is a chess opening that begins with the following moves: :1. b:Chess Opening Theory/1. e4, e4 b:Chess Opening Theory/1. e4/1...c5, c5 The Sicilian is the most popular and best-scoring response to White's first move 1.e4. Opening 1.d4 is a statistically more successful opening for White because of the high success rate of the Sicilian defence against 1.e4. ''New In Chess'' stated in its 2000 Yearbook that, of the games in its database, White scored 56.1% in 296,200 games beginning 1.d4, but 54.1% in 349,855 games beginning 1.e4, mainly because the Sicilian held White to a 52.3% score in 145,996 games. 17% of all games between Grandmaster (chess), grandmasters, and 25% of the games in the Chess Informant database, begin with the Sicilian. Grandmaster (chess), Grandmaster John Nunn attributes the Sicilian Defence's popularity to its "combative nature": "in many lines Black is playing not just for equality, but for the advantage. The drawback is that White o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pawn Structure
In a game of chess, the pawn structure (sometimes known as the pawn skeleton) is the configuration of pawns on the chessboard. Because pawns are the least mobile of the chess pieces, the pawn structure is relatively static and thus plays a large role in determining the strategic character of the position. General observations Weaknesses in the pawn structure, such as isolated, doubled, or backward pawns and , once created, are usually permanent. Care must therefore be taken to avoid them (but there are exceptions—for instance see ''Boleslavsky hole'' below). In the absence of these structural weaknesses, it is not possible to assess a pawn formation as good or bad—much depends on the position of the pieces. The pawn formation does determine the overall strategies of the players to a large extent, however, even if arising from unrelated openings. Pawn formations symmetrical about a vertical line (such as the ''e5 Chain'' and the ''d5 Chain'') may appear similar, but they te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Draw (chess)
In chess, there are a number of ways that a game can end in a draw, neither player winning. Draws are codified by various rules of chess including stalemate (when the player to move is not in check but has no legal move), threefold repetition (when the same position occurs three times with the same player to move), and the fifty-move rule (when the last fifty successive moves made by both players contain no or pawn move). Under the standard FIDE rules, a draw also occurs in a dead position (when no sequence of legal moves can lead to checkmate), most commonly when neither player has sufficient to checkmate the opponent. Unless specific tournament rules forbid it, players may agree to a draw at any time. Ethical considerations may make a draw uncustomary in situations where at least one player has a reasonable chance of winning. For example, a draw could be called after a move or two, but this would likely be thought unsporting. In the 19th century, some tournaments, notably ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passed Pawn
In chess, a passed pawn is a pawn with no opposing pawns to prevent it from advancing to the eighth ; i.e. there are no opposing pawns in front of it on either the same or adjacent files. A passed pawn is sometimes colloquially called a ''passer''. Passed pawns are advantageous because only the opponent's pieces can stop them from promoting. In the diagram, the white pawns on b5, c4, and e5 are passed pawns, and Black's pawn on d4 is a passed pawn. If Black plays ...fxg4, then the black pawn on g4 will be passed, as well as White's pawn on f4. Protected passed pawn A passed pawn that is protected by its own pawns is called a ''protected passed pawn''. In the first diagram in this article, the pawns on the b- and e-files are protected passed pawns. Two or more passed pawns on adjacent files are called ''connected passed pawns'' (see connected pawns), and they are very strong. In the diagram at the top, White's b- and c-pawns are connected passed pawns. A pair of connec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pawnless Chess Endgame
A pawnless chess endgame is a chess endgame in which only a few pieces remain, and no pawns. The basic checkmates are types of pawnless endgames. Endgames without pawns do not occur very often in practice except for the basic checkmates of king and queen versus king, king and rook versus king, and queen versus rook. Other cases that occur occasionally are (1) a rook and versus a rook and (2) a rook versus a minor piece, especially if the minor piece is a bishop. The study of some pawnless endgames goes back centuries by players such as François-André Danican Philidor (1726–1795) and Domenico Lorenzo Ponziani (1719–1796). On the other hand, many of the details and recent results are due to the construction of endgame tablebases. Grandmaster John Nunn wrote a book (''Secrets of Pawnless Endings'') summarizing the research of endgame tablebases for several types of pawnless endings. The assessment of endgame positions assumes optimal play by both sides. In some cases, one s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Berliner
Hans Jack Berliner (January 27, 1929 – January 13, 2017) was a Professor of Computer Science at Carnegie Mellon University, and was the World Correspondence Chess Champion, from 1965–1968. He was a Grandmaster of Correspondence Chess. He directed the construction of the chess computer HiTech, and was also a published chess writer. Early life Berliner was born January 27, 1929 in Berlin to a Jewish family. One of his classmates at school was future Estonian President Lennart Meri, whose father was serving as Estonia's ambassador to Germany. In 1937, Berliner's family moved to the United States to escape Nazi persecution, taking up residence in Washington, D.C. He learned chess at age 13, and "it quickly became his main preoccupation." Berliner is mentioned in "How I Started To Write", an essay by Carlos Fuentes, where he is described as "an extremely brilliant boy", with "a brilliant mathematical mind". "I shall always remember his face, dark and trembling, his aquiline ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Larry Kaufman
Lawrence Charles Kaufman (born November 15, 1947) is an American chess and shōgi player. In chess, he was awarded the title Grandmaster by FIDE for winning the 2008 World Seniors Championship (which he later retroactively shared with Mihai Suba). Kaufman had been previously awarded the title International Master in 1980. Background A longtime researcher in computer chess, Kaufman has made several contributions to chess-related works. He helped write the opening book for the pioneering program Mac Hack, co-developed Socrates II and its commercial adaptation, Kasparov's Gambit, edited the journal ''Computer Chess Reports'', and worked on many other research and commercial chess engines. He is also known for his work on computer chess engine Rybka 3, and several books and articles, includinThe Evaluation of Material Imbalances He helped develop the chess program Komodo with Don Dailey, with whom he had worked on the Socrates series of programs. After Dailey's death in 2013, Ka ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Euwe
Machgielis "Max" Euwe (; May 20, 1901 – November 26, 1981) was a Dutch chess player, mathematician, author, and chess administrator. He was the fifth player to become World Chess Champion, a title he held from 1935 until 1937. He served as President of FIDE, the World Chess Federation, from 1970 to 1978. Early years, education and professional career Euwe was born in the Watergraafsmeer, in Amsterdam. He studied mathematics at the University of Amsterdam under the founder of intuitionistic logic, L.E.J. Brouwer (who later became his friend and for whom he held a funeral oration), and earned his doctorate in 1926 under Roland Weitzenböck. He taught mathematics, first in Rotterdam, and later at a girls' Lyceum in Amsterdam. After World War II, Euwe became interested in computer programming and was appointed professor in this subject at the universities of Rotterdam and Tilburg, retiring from Tilburg University in 1971. He published a mathematical analysis of the game of chess ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edmar Mednis
Edmar John Mednis ( lv, Edmārs Džons Mednis; March 22, 1937 – February 13, 2002) was a Latvian-American chess player and writer of Latvian origin. He was awarded the title of Grandmaster by FIDE in 1980. Biography Mednis' family were refugees in 1944 during World War II. As displaced persons, Edmar and his two sisters, with parents Edvin and Marita Mednis, were permitted to emigrate to the United States in 1950. Mednis was trained as a chemical engineer, then worked as a stockbroker, but became best known as a chess author. He wrote 26 chess books, including ''Practical Rook Endings'' (1982) and ''Strategic Chess: Mastering the Closed Game'' (1993), and hundreds of chess articles. He and Robert Byrne annotated many games for ''Chess Informant''. Mednis finished second in the 1955 World Junior Championship behind Boris Spassky (the two drew their game). He was the first player to beat Bobby Fischer in a U.S. Championship. He played on the 1962 US team at the 15th C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
