⊙ (11. 748)

Denoted by the above symbol in international chess notation, we are remembered by New Shelton wet/dry of the term in its literal and metaphorical senses of the disadvantageous requirement to move or otherwise respond in Zugzwang. Although imprecise in its use in the game (a player is said to be in such a prelude to a checkmate when an open option when in a turn-based game each side is compelled to move will worsen their position, the concept is well understood), endgame studies from the eighteenth century on formalised the unsatisfactory compulsion or obligation—Zugpflicht—to make a move that yields to the offence.