[Event "Shakhmatnaya Kompozicia"] [White "Rusz, Árpád"] [Black "(Study 170)"] [Site ""] [Round ""] [Annotator ""] [Result "1/2-1/2"] [Date "2019.??.??"] [PlyCount "21"] [Setup "1"] [FEN "k1Kn1N2/b5P1/4p2Q/1P6/3q2r1/6p1/6Nn/7B w - - 0 1"] 1. Nxe6 {Threatening with checkmate on c7.} ({Thematic try:} 1. Nf4+ g2 2. Bxg2+ Rxg2 3. N8xe6 (3. Nxg2 Nf7 4. Nxe6 Qc4+ 5. Nc7+ Qxc7+ 6. Kxc7 Nxh6 )Nxe6 4. Nxe6 Qg4 {Black pins the knight. The g4 square was empty because the rook managed to move away.} )Nxe6 2. Nf4+ g2 3. Nxe6 { White again is threatening to give checkmate on c7. The knight cannot be pinned by Qg4.} ({Letting the rook to move away from g4 is again a mistake:} 3. Bxg2+ Rxg2 4. Nxe6 Qg4 )Qc4+ (3... gxh1=Q 4. Nc7# )4. Nc7+ Qxc7+ 5. Kxc7 Rxg7+ (5... Bb8+ 6. Kd8 {The white king leaves the c8 square empty.} gxh1=Q 7. Qa6+ Ba7 8. Qc8+ Bb8 9. Qa6+ {perpetual check} )6. Qxg7 Bb8+ 7. Kc6 {Triangulation. White lets black to promote the pawn with check.} ({Thematic try:} 7. Kb6 gxh1=Q {mutual zugzwang} )gxh1=Q+ 8. Kb6 {mutual zugzwang - Focal Theme. The black queen has to keep an eye on both b7 and a1.} Qg1+ ({Moving the knight is a wrong idea because it will interfere the black queen.} 8... Nf1 9. Qa1+ Ba7+ 10. Qxa7# )(8... Nf3 9. Qb7# )9. Qxg1 Ba7+ 10. Kc7 Bxg1 11. b6 {The knight is again in a wrong place blocking the h2 square for the bishop.} 1/2-1/2