Duck Chess vs Dark Chess

Duck Chess is a modern variant of standard chess in which a small, impassable rubber duck token is introduced to the board. After a player completes a traditional chess move, they must also move the duck to any adjacent, unoccupied square on the board. The square occupied by the duck becomes completely blocked, meaning no pieces can pass through, capture, or land on it. This additional mechanic fu...

Dark Chess is a chess variant using fog-of-war mechanics in which each player can see only the squares occupied or attacked by their own pieces. Unlike Kriegspiel, it generally requires no referee, with legality enforced by the game software or app. Moves are submitted normally, and attempting an illegal move results in the piece remaining in place, revealing a blocked path. It is popular in onlin...