[Event "Havana"] [Site "?"] [Round "0"] [White "Chigorin and Ponce"] [Black "Steinitz and Gavilan"] [Result "0-1"] [FEN "6rk/ppp4p/1b3q2/4p1p1/4Pr2/2P2B2/P4PPP/R2Q1RK1 w - - 0 1"] [ECO "A00"] [Opening "Clemenz Opening"] {The avoidance of weakening moves} 1. h3 $2 { White weakens an already seriously compromised position} (1. -- {The threat is} 1... g4 2. Be2 g3 3. hxg3 Rxf2 4. Rxf2 Qxf2+ 5. Kh1 Qxg3) (1. Kh1 { Steinitz's move for White to defend himself} 1... g4 2. Be2 Rxf2 (2... Bxf2 3. g3 $1 Rxe4 (3... Qh6 4. Qd5 {counterattack} (4. gxf4 g3) 4... Bxg3 5. Qxe5+ Rg7 6. Qe8+ $11 {perpetual check}) 4. Kg2) 3. Rxf2 Qxf2 4. Bxg4) 1... g4 $1 2. hxg4 (2. Bxg4 Rgxg4 3. hxg4 Rxf2 4. Rxf2 Qxf2+ 5. Kh1 Qh4# { thematic Queen and Bishop mate}) 2... h5 3. g5 (3. gxh5 Rxf3 {pin}) 3... Rxg5 4. Kh2 Rh4+ 5. Kg1 Qf4 6. Re1 Rxg2+ $1 {Thematic destruction} 7. Bxg2 (7. Kxg2 Qh2+ 8. Kf1 Qxf2#) (7. Kf1 Rxf2+ 8. Kg1 Qh2#) 7... Qxf2# 0-1