ANTI-BRISTOL The interference of one black piece by another like moving one on the same line (if the pieces are on different lines, it is a Holzhausen). [Event "La Strategie"] [Site "?"] [Date "1921.05.??"] [Round "?"] [White "A.W. Mongredien"] [Black "Mate in 3 moves"] [Result "*"] [SetUp "1"] [FEN "7B/8/r6q/1Np5/2k5/6PB/2P3NP/1R1R3K w - - 0 1"] [PlyCount "5"] 1. c3 Ra1 (1... Rf6 2. Be6+ Rxe6 3. Na3#) 2. Ne3+ Qxe3 3. Nd6# * You must activate JavaScript to enhance chess game visualization.