Author: Ernst Walet
Date: 13:18:23 07/10/03
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On July 10, 2003 at 15:04:25, Matthew White wrote: >Underpromotion position from >Chan - Depasquale >Laoag 1985 >[D]6k1/8/4p3/4Pp1p/5P1P/3Rn2K/6p1/8 b - - > >The only winning move is 1...g1=B! > >For example, 1...g1=Q 2. Rd8+ Kh7 (or Kf7 Rd7+ Ke8 Rd8+ etc) 3. Rh8+ Kxh8 (or >Kg7 Rg8+ Kxg8 stalemate) stalemate. > >Most engines see this, though it takes up to 8 ply or so most of the time... >wbNimzo2000 doesn't seem to be able to find the correct move. Nimzo8, OTOH, >does... Guess he found the bug :). Maybe it will help you find a bug too... > >Regards, >Matt Cm9000 finds it in 4 ply Time Depth Score Positions Moves 0:00 1/3 -8.55 2085 1...g1=Q 2.Rd8+ Kf7 3.Rd7+ Kf8 4.Rd8+ Ke7 5.Rd7+ Ke8 0:00 1/4 0.00 3466 1...g1=Q 2.Rd8+ Kf7 3.Rd7+ Kf8 4.Rd8+ Ke7 5.Rd7+ Ke8 6.Rd8+ Ke7 0:00 1/4 -0.96 4110 1...g1=B 2.Kg3 Nd5 3.Kf3 Kf7 0:00 1/5 -0.93 6220 1...g1=B 2.Rd8+ Kf7 3.Rd7+ Ke8 4.Rd6 Ke7 5.Kg3 0:00 1/6 -1.05 11005 1...g1=B 2.Rd8+ Kf7 3.Rd7+ Ke8 4.Rh7 Nd5 5.Kg3 Be3 0:00 1/7 -0.99 22830 1...g1=B 2.Rb3 Kf7 3.Rb7+ Ke8 4.Kg3 Nd5 5.Kf3 Bc5 0:00 1/8 -0.99 38940 1...g1=B 2.Rb3 Kf7 3.Rb7+ Ke8 4.Kg3 Nd5 5.Kf3 Bc5 0:00 2/9 -1.04 71451 1...g1=B 2.Rd7 Nd5 3.Kg3 Be3 4.Kf3 Bxf4 5.Rxd5 exd5 6.Kxf4 d4 7.e6 0:00 3/10 -0.95 208320 1...g1=B 2.Rb3 Ng4 3.Kg2 Bc5 4.Rb8+ Kf7 5.Rh8 Kg6 6.Rg8+ Kh7 7.Rc8 Bb6 0:00 4/11 -0.91 306071 1...g1=B 2.Rb3 Kf8 3.Rb1 Bf2 4.Rb2 Ng4 5.Rb8+ Ke7 6.Rh8 Be3 7.Rh7+ Kd8 8.Kg3 0:01 5/12 -0.91 467659 1...g1=B 2.Rb3 Kf8 3.Rb1 Bf2 4.Rb2 Ng4 5.Rb8+ Kf7 6.Rb7+ Ke8 7.Rh7 Be3 8.Kg3 0:02 6/13 -0.85 1067802 1...g1=B 2.Rb3 Ng4 3.Kg2 Bc5 4.Rb8+ Kf7 5.Kf3 Be7 6.Rb7 Ke8 7.Rb8+ Kd7 8.Rb7+ Kd8 9.Rb6 0:04 7/14 -0.85 1757135 1...g1=B 2.Rb3 Ng4 3.Kg2 Bc5 4.Rb8+ Kf7 5.Kf3 Be7 6.Rb7 Ke8 7.Rb6 Kd7 8.Rb7+ Kd8 9.Rb6 0:07 8/15 -0.87 3336259 1...g1=B 2.Rb3 Ng4 3.Kg2 Bf2 4.Rb8+ Kf7 5.Rb7+ Ke8 6.Kh3 Be1 7.Rh7 Nf2+ 8.Kg3 Ne4+ 9.Kf3 Bxh4 10.Rxh5 Bf2 11.Rh7 0:13 9/16 -0.96 5927690 1...g1=B 2.Rb3 Bf2 3.Rb2 Ng4 4.Rb8+ Kf7 5.Rb7+ Ke8 6.Rb3 Kd7 7.Rd3+ Ke7 8.Rb3 Be1 9.Rb7+ Kd8 10.Rh7 Nf2+ 11.Kg3 Nd3+ 12.Kf3 Bxh4 13.Rxh5 Ernst.
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