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This difference is typical of many endgames. DTC is always smaller than or equal to DTM, but the DTM metric always leads to the quickest checkmate. Incidentally, DTC = DTM in the unusual endgame of two knights versus one pawn because capturing the pawn (the only material Black has) results in a draw, unless the capture is also checkmate.
Fool's mate was named and described in The Royal Game of Chess-Play, a 1656 text by Francis Beale that adapted the work of the early chess writer Gioachino Greco. [2]Prior to the mid-19th century, there was not a prevailing convention as to whether White or Black moved first; according to Beale, the matter was to be decided in some prior contest or decision of the players' choice. [3]
A checkmate may occur in as few as two moves on one side with all of the pieces still on the board (as in fool's mate, in the opening phase of the game), in a middlegame position (as in the 1956 game called the Game of the Century between Donald Byrne and Bobby Fischer), [3] or after many moves with as few as three pieces in an endgame position.
Tsume problems usually present a situation that might occur in a shogi game (although unrealistic artistic tsume shogi exists), and the solver must find out how to achieve checkmate. It is similar to a mate-in-n chess problem. The term tsumi (詰み) means the state of checkmate itself. The verb form is tsumu (詰む) "to checkmate
The match score is usually given as "6−5", or "6−5 with 21 draws". Sometimes a Three points for a win system is used: 3 points for a win, 1 for a draw and 0 for a loss. This is usually shown as the number of points from number of games played, for instance "10 points from 6 games" for 3 wins, 2 losses and 1 draw.
Back-rank mates are often guarded against by a friendly rook or queen protecting the back rank. However, it may be possible for the attacking side to deflect one of these pieces away from defensive duties, sacrifice a queen for one of them, or exchange one of them, or the pieces may simply be overworked. In the example shown to the left, White ...
Kerry Carpenter's dramatic 3-run home run in the ninth inning evened the Detroit Tigers and Cleveland Guardians ALDS at a game apiece.
Chess engines usually assign the king an arbitrary large value such as 200 points or more to indicate that the inevitable loss of the king due to checkmate trumps all other considerations. [9] During the endgame, as there is less danger of checkmate, the king will often assume a more active role.