Author: John Merlino
Date: 11:55:26 09/18/02
Go up one level in this thread
On September 18, 2002 at 05:32:34, Dann Corbit wrote: >On September 17, 2002 at 22:57:26, Dann Corbit wrote: > >>Which engine finds the checkmate in this one: >>[D]r3nr1k/ppqbNpp1/7p/2p1p3/2B4Q/P4P2/1PP4P/2KR2R1 w - - >>? >> >>Not just the key move -- the checkmate sequence. > >The Chessmaster recommends: Rook takes pawn. > >Analysis: Your rook captures pawn, which threatens mate (queen takes pawn), >attacks Black's pawn at h6, and isolates Black's pawn at h6. Black responds by >moving queen to b6, which protects Black's pawn at h6. You move your rook to g6, >which threatens mate (queen takes pawn) and forks Black's queen and Black's pawn >at h6. Black counters with queen takes rook, which removes the threat on Black's >pawn at h6. Your knight captures queen, which quadruple-forks Black's king, >Black's pawn at e5, Black's rook at f8, and Black's pawn at h6. Black responds >by moving the king to g7, which moves it out of check and protects Black's pawn >at h6. Your knight captures rook. Black counters with the knight to f6, which >removes the threat on Black's bishop. Your knight captures bishop, which forks >Black's pawn at c5 and Black's pawn at e5. Black responds with the knight to h7. >You move your rook to g1, which checks Black's king. Black replies by moving the >king to h8, which moves it out of check. You move your queen to g3, which >threatens checkmate (queen to g7). Black replies by moving knight to g5, which >protects Black's pawn at f7. Your queen takes pawn, which checks Black's king >and isolates Black's pawn at f7. Black responds by moving king to h7, which >moves it out of check. You move your bishop to d3, which checks Black's king. >Black counters with the pawn to f5, which protects Black's king. Your queen >captures pawn at f5, which protects your pawn at f3, checks Black's king, and >creates a passed pawn on f3. Black responds with the king to h8, which moves it >out of check. You move your queen to f6, which forks Black's pawn at h6 and >Black's king. Black is forced to move king to g8, which moves it out of check. >Your rook captures knight, which checks Black's king. Black is forced to move >pawn takes rook, which removes the threat on Black's king. You move your queen >to g6, which checks Black's king. Black is forced to move king to h8, which >moves it out of check. You move your queen to h7, which checkmates Black's king. > >You can force checkmate in 14 moves. Wow, even I'm impressed! I'm assuming you used Chessmaster 8000 for this, because Chessmaster 9000 never announces Mate in 14. This is on a PIII-600: Time Depth Score Positions Moves 0:00 1/3 -0.72 1749 1.Nd5 Qd8 2.Qe4 0:00 1/3 -0.42 3350 1.Rg6 Kh7 2.Nd5 0:00 1/4 -0.13 6624 1.Rg6 Kh7 2.Nd5 Qd8 0:00 1/5 -0.33 56780 1.Rg6 Kh7 2.Rg2 Nd6 3.Qg3 g6 4.Qxe5 0:01 1/5 -0.09 85398 1.Bxf7 Bf5 2.Nxf5 Qxf7 3.Nxh6 Qf4+ 4.Qxf4 Rxf4 0:01 1/6 0.57 142695 1.Bxf7 Bf5 2.Nxf5 Rxf7 3.Nxh6 Rxf3 4.Nf5+ Kg8 0:02 1/6 5.82 215974 1.Rxg7 Kxg7 2.Rg1+ Kh7 3.Bd3+ e4 4.Bxe4+ f5 5.Rg6 Qf4+ 6.Qxf4 0:05 1/7 13.70 560036 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7 4.Nxf8 Bb5 5.Bxb5 Nc7 6.Qe7 Rxf8 7.Qxc7 0:11 1/8 15.33 1183094 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7 4.Nxf8 Nf6 5.Nxd7 Nh7 6.Qe7 Ng5 7.Qf6+ Kg8 8.Nxe5 0:28 1/9 17.55 3165238 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7 4.Nxf8 Nf6 5.Nxd7 Nh7 6.Rg1+ Kh8 7.Nxe5 Rf8 8.Nxf7+ Rxf7 9.Bxf7 1:08 1/10 Mate11 7968913 1.Rxg7 Qb6 2.Rg6 Qxg6 3.Nxg6+ Kg7 4.Rg1 Bg4 5.Nxe5 Rd8 6.Qxg4+ Kf6 7.Nxf7 Rd1+ 8.Kxd1 Ng7 9.Qg6+ Ke7 10.Qd6+ Ke8 11.Qd8# The Chessmaster recommends: Rook takes pawn. Analysis: Your rook captures pawn, which threatens mate (queen takes pawn), attacks Black's pawn at h6, and isolates Black's pawn at h6. Black responds by moving queen to b6, which protects Black's pawn at h6. You move your rook to g6, which threatens mate (queen takes pawn) and forks Black's queen and Black's pawn at h6. Black counters with queen takes rook, which removes the threat on Black's pawn at h6. Your knight captures queen, which quadruple-forks Black's king, Black's pawn at e5, Black's rook at f8, and Black's pawn at h6. Black responds by moving the king to g7, which moves it out of check and protects Black's pawn at h6. You move your rook to g1. Black counters with the bishop to g4, which attacks your pawn at f3. Your knight captures pawn, which pins Black's bishop, removes the threat on your pawn at f3, and isolates Black's pawn at f7. Black counters by moving the rook to d8, which seizes the open file. Your queen takes bishop, which checks Black's king. Black responds by moving king to f6, which moves it out of check and attacks your knight. Your knight captures pawn, which threatens to mate (queen to e6), forks Black's pawn at h6 and Black's rook at d8, and creates a passed pawn on f3. Black replies by moving rook to d1, which checks your king. Your king takes rook, which threatens to mate (queen to e6). Black replies by moving knight to g7, which takes the knight away from the edge of the board. You move your queen to g6, which checks Black's king. Black is forced to move king to e7, which moves it out of check. You move your queen to d6, which skewers Black's king and forks Black's king and Black's pawn at c5. Black is forced to move king to e8, which moves it out of check. You move your queen to d8, which checkmates Black's king. You can force checkmate in 11 moves. jm
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