Author: John Merlino
Date: 13:23:37 02/28/01
Go up one level in this thread
On February 28, 2001 at 11:48:39, Sune Larsson wrote: > > [D]r1bq1rk1/ppp2pp1/3b1n1p/2p1p3/4P2B/2NP1N2/PPP2PPP/R2Q1RK1 w - - 0 1 > > Here is an example of a definitive no-no. This position happened in > Winter(!) - Capablanca, London 1922. Here white was a bit careless > and played 1.Nd5? after 1.-g5 2.Nxf6+ Qxf6 3.Bg3 Bg4 4.h3 Bxf3 > 5.Qxf3 Qxf3 6.gxf3, the proud bishop was reduced to a simple pawn. > This preacher never saw the daylight anymore... > > Test1: 1.Nd5? is a clear no-no and should be evaluated with penalty > points. > > Test2: If 1.Nd5? is faced, your program should give definite +scores > to the line above. And choose this path in play. > > Sune CM8000 never considers playing 1.Nd5, but doesn't see it as particularly losing either (note 2.Bg3 rather than 2.Nxf6+): Time Depth Score Positions Moves 0:00 2/6 0.19 24941 1. Nd2 Be7 2. Bxf6 Bxf6 3. Qf3 Be6 4. Rae1 0:01 3/7 0.21 84656 1. Nd2 Be7 2. Bg3 Bd6 3. Nc4 Re8 4. Qf3 Bg4 0:03 3/8 0.25 182971 1. Nd2 c6 2. Nc4 b5 3. Bxf6 Qxf6 4. Nxd6 Qxd6 5. Qf3 Be6 0:08 4/9 0.23 506657 1. Nd2 c6 2. Nc4 Bc7 3. Ne3 b5 4. Qf3 g5 5. Bg3 Be6 0:22 4/10 0.24 1440598 1. Nd2 c6 2. a4 Bc7 3. Nc4 Re8 4. Qf3 g5 5. Bg3 Bg4 0:59 5/11 0.18 4175383 1. Nd2 c6 2. Nc4 Bc7 3. Ne3 Be6 4. Qf3 g5 5. Bg3 g4 6. Qe2 ---- ---- ---- ---- ---- 0:00 2/6 0.14 21106 1...g5 2. Bg3 Nxd5 3. exd5 f6 4. Nd2 Bd7 5. Qe2 0:00 3/7 0.09 52586 1...g5 2. Nxf6+ Qxf6 3. Bg3 Bg4 4. h3 Bxf3 5. Qxf3 Qxf3 6. gxf3 Rfd8 7. Rae1 0:01 3/8 0.09 125609 1...g5 2. Bg3 Nxd5 3. exd5 f6 4. Nd2 Bf5 5. Qf3 Qd7 6. Rae1 0:05 4/9 0.02 373533 1...g5 2. Bg3 Nxd5 3. exd5 f6 4. Nd2 Bf5 5. Qh5 Be7 6. Qxh6 Qxd5 0:13 4/10 0.12 1079192 1...g5 2. Bg3 Nxd5 3. exd5 f6 4. Nd2 Bf5 5. Qh5 Kg7 6. Nc4 Qd7 7. Ne3 0:50 5/11 0.00 4311639 1...g5 2. Nxf6+ Qxf6 3. Bg3 Bg4 4. Re1 Rfe8 5. Re3 Rad8 6. h3 Bh5 7. a4 Kh7 3:30 6/12 -0.03 18382248 1...g5 2. Bg3 Nxd5 3. exd5 f6 4. Nd2 Bf5 5. Nc4 Qd7 6. Qh5 Kg7 7. Ne3 Bg6
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