Chess problems

problem made with chess

sequence of moves of a knight on a chessboard to visit each square exactly once

composed chess endgame position

thumb | right | Example of selfmate A selfmate is a chess problem in which White, moving first, must force Black to deliver checkmate within a specified number of moves. Selfmates were once known as sui-mates.

A helpmate is a type of chess problem in which both sides cooperate in order to achieve the goal of checkmating Black. In a helpmate in n moves, Black moves first, then White, each side moving n times, to culminate in White's nth move checkmating Black. (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.

technique employed to determine which moves were played leading up to a given position

earliest known work devoted entirely to modern chess

publication of the world chess governing body, FIDE

piece used in fairy chess or chess variants

Annual chess puzzles competition

chess variant

device found in chess problems in which 2 pieces arriving on a square mutually interfere

model mate involving all pieces of both players

chess problem of a directmate with White to move, in which Black may defend by promoting, and such that if Black promotes, then White must promote to the same piece that Black just promoted to

puzzle based on the board game chess

chess endgame with a king and two knights versus a king, possibly with pawns

Allumwandlung (, German for "complete promotion", sometimes abbreviated AUW) is a chess problem theme where, at some stage in the solution, a pawn (or sometimes pawns) is promoted variously to a queen, rook, bishop, and knight. Allumwandlung's main requirement is promotion, either a white pawn or a black pawn. A Babson task may appear if both pawns are spotted in an individual problem, corresponding one another.

pure mate where the checkmated king and all vacant squares in its field are attacked only once, squares in the king’s field occupied by friendly units are not attacked, and all units of the mating side participate in the mate

checkmating position such that the mated king is attacked exactly once and prevented from moving to any of the adjacent squares in its field for exactly one reason per square

checkmate position such that all of the attacker’s remaining knights, bishops, rooks and queens contribute to the mating attack

chess problem

retrograde analysis chess problem in which the solver must construct a game which ends with a given position after a specified number of moves

chess puzzle that uses humor

German bimonthly magazine specialized on chess compositions

triennial competition for composers of chess problems and studies

device found in some chess problems; a Grimshaw brought about by a sacrifice on the critical square

manuscript

manoeuvre found in chess problems, first used by Henry

Wikimedia glossary list article

chess problem in which a white pawn makes all 4 possible moves (forward 1 square, forward 2 squares, left capture, right capture)

A reflexmate is a chess problem in which White, moving first, must force Black to deliver checkmate within a specified number of moves against their will – with the added condition that if either player can give checkmate, they must. If this condition applies only to Black, it is a semi-reflexmate. (Without this condition, the problem is just ordinary selfmate.)