Author: Vincent Diepeveen
Date: 10:30:34 06/28/02
Go up one level in this thread
On June 27, 2002 at 13:36:19, Peter Berger wrote: >On June 27, 2002 at 04:04:07, Vincent Diepeveen wrote: > >>Hello, >> >>Several positions in WM test the solutions given aren't the >>objective best moves. >> >>For example i get impression that at position 16: >> >> >>r1k4r/1b1q1pp1/p6p/3n4/1B3Pn1/1P1B4/P1PQ3P/2KRR3 w - - bm Ba5; id "CSS WM-Test >>16) Lb4-a5 (K)"; >> >>Undoubtfully Ba5 is a good move, but completely material >>winning is c2-c4 here. You get directly a rook at the 7th rank, >>swallow f7 + g7, and black is completely immobilized the rest of >>the game. Soon also Rd1-e1-e7 happens and it's a mate in XXX soon >>then. >> >>I can imagine why a human plays Ba5 here and doesn't take a risk (note >>the chessprograms want this all initially too), but let's look objective >>to the position. Not finding c4 soon means a program is a tactical joke. >> >>As a human i wouldn't find c4 so soon either. I would go for Ba5, because >>i know how much i suck in tactics. >> >>Best regards, >>Vincent > >This is what I get with Crafty 17.13: > >14-> 28:00 0.00 1. c4 Nxb4 2. Qxb4 Nf6 3. Re7 Qc6 4. > Bf5+ Kb8 5. Rd6 Qh1+ 6. Rd1 Qc6 > 15 36:53 0.00 1. c4 Nxb4 2. Qxb4 Nf6 3. Re7 Qc6 4. > Bf5+ Kb8 5. Rd6 Qh1+ 6. Rd1 Qc6 > 15 125:37 0.20 1. Ba5 Ngf6 2. c4 Nc7 3. Qb4 Re8 4. > Rxe8+ Nfxe8 5. Qc5 g6 6. Bxg6 fxg6 > 7. Rxd7 Kxd7 8. Qd4+ Kc8 9. Kd2 Bf3 > 15-> 125:37 0.20 1. Ba5 Ngf6 2. c4 Nc7 3. Qb4 Re8 4. > Rxe8+ Nfxe8 5. Qc5 g6 6. Bxg6 fxg6 > 7. Rxd7 Kxd7 8. Qd4+ Kc8 9. Kd2 Bf3 > >Crafty 17.13 gets 1. c4 very fast with negative score and then drawscore soon. >It needs a long time to find 1. Ba5 with a slight positive score. I expect it to >fail-high on Ba5 in ply 16. > >If 1.c4 is completely material winning it must be very deep and tough for >computers. If you let Diep think for a long time, will it keep with 1. c4 or >will it change its mind to 1. Ba5 eventually ? > >Regards, >Peter DIEP wasn't on pc beginners hardware when running the position.
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