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(In a helpmate in 2 for example, sometimes abbreviated h#2, the solution consists of a Black move, a White move, a second Black move, then a second White move, giving checkmate.) Although the two sides cooperate, all moves must be legal according to the rules of chess. The example problem illustrated is a helpmate in 8 (or h#8) by Z. Maslar ...
A chess problem, also called a chess composition, is a puzzle created by the composer using chess pieces on a chessboard, which presents the solver with a particular task.. For instance, a position may be given with the instruction that White is to move first, and checkmate Black in two moves against any possible defen
A type of problem in which there are two solutions, the second one reversing the roles of the colours in the first. The most common type is the duplex helpmate, in which the two solutions are: Black moves first and cooperates with White to be mated; and White moves first and cooperates with Black to be mated.
Chess problems are divided into orthodox and heterodox types, both covering a variety of genres. Orthodox problems employ the standard rules of chess and involve positions that can legally arise from actual gameplay. The most common form of orthodox problem is the directmate, which stipulates checkmate in n moves, usually two or three. The ...
A Grimshaw is a device found in chess problems in which two pieces (usually a rook and bishop) arriving on a particular square mutually interfere with each other. It is named after the 19th-century problem composer Walter Grimshaw. The Grimshaw is one of the most common devices found in directmates.
A seriesmover is a chess problem in which one side makes a series of legal moves without reply at the end of which the other side makes a single move, giving checkmate or yielding stalemate, depending on the precise stipulation. [1] Checks cannot be given except on the last move of the series. There are various types of seriesmover:
Dawson published his first problem, a two-mover, in 1907. His chess problem compositions include 5,320 fairies, 885 directmates, 97 selfmates, and 138 endings. 120 of his problems have been awarded prizes and 211 honourably mentioned or otherwise commended. He cooperated in chess composition with Charles Masson Fox.
The problem is a helpmate in 2, which means Black moves first and cooperates with White to move to a position where Black is in checkmate after White's second move. This problem features grasshoppers (represented here by inverted queens), a fairy chess piece which moves along the same lines as a queen , but which must "hop" over another piece ...