A fortress in chess is a defensive setup in which the stronger side cannot make progress despite a material advantage. The pieces and pawns protect the required entry squares, and any attempt to break through either repeats the position or …
Zugzwang in chess is the remarkable situation in which having to move becomes a disadvantage. ⏳ The position may appear balanced, yet every legal move gives something away. 🧩 Using zugzwang in chess is most common in endgames, but its …