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The two knights endgame is a chess endgame with a king and two knights versus a king. In contrast to a king and two bishops (on opposite-colored squares), or a bishop and a knight, a king and two knights cannot force checkmate against a lone king (however, the superior side can force stalemate [1] [2]).
A bare king can never give check, however, and can therefore never deliver a checkmate or win the game. A bare king can in some situations play to a draw, such as by stalemate, capturing the opponent's pieces to reduce his advantage to an unwinnable one or if the opponent of a bare king oversteps the time limit. [5]
The most common form of double check involves one piece moving to deliver check and revealing a discovered check at the same time from a piece it had been blocking. The only possible reply to a double check is a king move, as it is impossible to block or capture both checking pieces at once.
A dead position is defined as a position where neither player can checkmate their opponent's king by any sequence of legal moves. [34] According to the rules of chess the game is immediately terminated the moment a dead position appears on the board. Some basic endings are always dead positions; for example: king against king;
Proviso (4) above is exactly the rule that says you can't castle through check, though. The square the rook ends up on is exactly the same as the square the king passes through. It is actually (3) that is against the standard rules: you can castle if your rook is attacked. Double sharp 11:53, 5 October 2021 (UTC)
The king is not allowed to castle when it is in check. Blocking the check . Also called interposing , this is possible only if the checking piece is a queen , rook , or bishop and there is at least one empty square in the line between the checking piece and the checked king.
Three-check chess, also simply known as three-check, is a chess variant where a player can win by placing their opponent in check three times. Apart from this, standard rules of chess apply, including starting position and other ending conditions, such as stalemate and checkmate.
Since many pieces (pawn, lance, knight, silver) can all promote to gold-like piece, checkmate by a gold is usual. Because of the relative ease of mating with a gold compared to other pieces, it is often advantageous to keep a gold in hand during the endgame so that a mate with a dropped gold can be executed.