[Event "Gravure"] [White "Rusz, Árpád"] [Black "(Study 177)"] [Site ""] [Round ""] [Annotator ""] [Result "1-0"] [Date "2019.??.??"] [PlyCount "13"] [Setup "1"] [FEN "1k6/1P2q2b/K2N4/8/4P3/B2N4/8/8 w - - 0 1"] 1. Bc5 Qxb7+ (1... Bxe4 2. Ba7+ )(1... Qxd6+ 2. Bxd6# )2. Nxb7 Bxe4 { Fork! Unfortunately, the white bishop occupies the c5 square, so the knights cannot defend each other...} 3. Ba7+ (3. Bd6+ Ka8 4. Ndc5 (4. Nbc5 Bxd3+ 5. Nxd3 {stalemate} )Bxb7+ 5. Nxb7 {stalemate} )Ka8 {The black king wants a stalemate. Now the c5 square is empty. Can the knights defend each other? No!} 4. Nb4 ({1st thematic try:} 4. Nbc5 Bxd3+ 5. Kb6 (5. Nxd3 {stalemate} )Bc4 {mutual zugzwang} )({2nd thematic try:} 4. Ndc5 Bxb7+ 5. Kb6 (5. Nxb7 {stalemate} )Bc8 {mutual zugzwang} )Bxb7+ 5. Kb6 {mutual zugzwang} Bd5 (5... Ba6 6. Nd5 Bc4 7. Nc7# )6. Na6 Bc4 7. Nc7# 1-0