Author: Sune Larsson
Date: 12:41:36 02/28/01
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On February 28, 2001 at 15:11:17, John Merlino wrote: >On February 28, 2001 at 07:13:50, Sune Larsson wrote: > >> >> 3r1r1k/p2p2pp/np1P1q2/5p2/1PP1p3/P3Q3/B2R1PPP/4R1K1 w - - 0 1 >> >> This is the game Kurt Richter - Schlage, Berlin 1930. >> We can call it a positional test. The theme is about >> immobilizing your opponent's pieces. Guess Richter was >> in a splendid mood when he played 1.c5! bxc5 2.b5! Nb8 3.Lc4! >> The black knight was a mere spectator for the rest of the game: >> >> 1.c5! bxc5 2.b5! Nb8 3.Bc4! Rde8 4.f4 Rc8 5.a4 h6 6.Rd5 g5 7.fxg5 Qxg5 >> 8.Qxg5 hxg5 9.g4! fxg4 10.Rxe4 Rf4 11.Rxf4 gxf4 12.Rg5 g3 13.hxg3 fxg3 >> 14.Kg2 Kh7 15.Kxg3 a6 16.Kf4 axb5 17.axb5 Kh6 18.Rg8 Rxg8 19.Bxg8 Kg7 >> 20.Bc4 Kf6 21.Ke4 Kg5 22.Kd5 Kf4 23.Kxc5 Ke5 24.Bg8 Kf6 25.Kb6 1-0 >> >> Test: Your program should give white a big +score for the >> moveorder 1.c5! bxc5 2.b5! >> >> Sune > >CM8000 doesn't think that 1...bxc5 is the proper response: > >Time Depth Score Positions Moves >0:00 1/4 1.29 4958 1. c5 b5 2. Red1 Rfe8 >0:00 2/5 1.16 11158 1. c5 b5 2. Red1 Rfe8 3. Bd5 >0:00 2/6 1.32 26902 1. c5 b5 2. Red1 Rfe8 3. Qe2 Rb8 > 4. Qh5 >0:01 3/7 1.15 79474 1. c5 b5 2. Bb3 Nb8 3. a4 bxa4 > 4. Bxa4 Rfe8 5. Bb3 >0:03 3/8 1.18 202795 1. c5 b5 2. c6 dxc6 3. d7 Nc7 4. > Red1 Ne6 5. Bxe6 Qxe6 6. Qxa7 >0:10 4/9 1.08 669892 1. c5 b5 2. Bb3 Nb8 3. a4 bxa4 > 4. Bxa4 Rde8 5. Bb5 f4 >0:35 4/10 1.26 2285646 1. c5 b5 2. c6 dxc6 3. d7 Nc7 4. > Red1 a6 5. Qb6 Nd5 6. Bxd5 cxd5 > 7. Qxf6 Rxf6 8. Rxd5 >2:03 5/11 1.20 8800155 1. c5 b5 2. c6 dxc6 3. d7 Ra8 4. > Red1 Qe7 5. Rd6 f4 6. Qc3 > >After playing 1.c5 bxc5, though: > >Time Depth Score Positions Moves >0:00 2/5 1.41 6473 2. b5 Nb8 3. Qxc5 Qh6 4. Rc2 >0:00 3/7 1.21 40891 2. b5 Nb8 3. Qxc5 a6 4. bxa6 Qh6 > 5. Qc3 Nxa6 >0:02 3/8 1.19 119926 2. b5 Nb8 3. Qxc5 a6 4. b6 Rc8 > 5. Qe3 Nc6 6. Rc1 >0:06 4/9 1.28 419302 2. b5 Nb8 3. Qxc5 a6 4. bxa6 Nxa6 > 5. Qa5 Ra8 6. Bc4 Qg5 7. Red1 >0:22 4/10 0.93 1504912 2. b5 Nb8 3. Qxc5 a6 4. a4 Rc8 > 5. Qe3 axb5 6. axb5 Rc3 7. Qa7 > Rfc8 >1:28 5/11 1.01 7005842 2. b5 Nb8 3. Qxc5 a6 4. b6 Rc8 > 5. Qa5 Qc3 6. Qxc3 Rxc3 7. a4 Nc6 > 8. Rb1 > >jm Interesting that CM answers 1.c5 with 1.-b5, thereby keeping his knight more alive. In the second line I noticed that most programs are very anxious about an immediate recapture of the c5 pawn (3.Qxc5). Richter showed a more convincing way by keeping the knight in his stable. Sune
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