Undermining (chess) Undermining (chess) Undermining (also known as removal of the guard, or removing the defender) is a chess tactic in which a defensive piece is captured, leaving one of the opponent's pieces undefended or under-defended. The opponent has the unpalatable choice of recapturing or saving the undefended piece. A possible response is to sacrifice the piece whose defense was undermined before capturing the piece which just took the defender. Kramnik–Topalov in the seventh round of the 2004 Linares chess tournament reached the diagrammed position with White to play. The black knight on a4 is defended only by the black pawn on
Human chess Human chess Human chess is a form of chess in which people take the place of pieces. Human chess is typically played outdoors, either on a large chessboard or on the ground, and is often played at Renaissance fairs. Many human chess games are choreographed stage shows performed by actors trained in stage combat. When this is the case, piece captures are represented by choreographed fights that determine whether the piece is actually taken or not. Alternatively, the pieces may spar, following rules similar to those used by the Society for Creative Anachronism. A costumed human chess game has been