Author: Vincent Lejeune
Date: 04:20:48 06/29/02
Go up one level in this thread
On June 27, 2002 at 11:53:00, Roy Eassa 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 > > >[d] r1k4r/1b1q1pp1/p6p/3n4/1B3Pn1/1P1B4/P1PQ3P/2KRR3 w - - >I think the point of 1.Ba5 is to play c4 NEXT, when it is even more effective. > >Here are some possibilities: > >1.Ba5! > > [1.c4 Nxb4 2.Qxb4 Nf6 > (2...Kb8 3.Re7 a5 4.Qe1 Qc8 5.h3 Nf6 6.Qe5+ Ka7 7.Qd4+ Kb8 8.Qd6+ Ka7 > 9.c5 Rd8 10.Qb6+ Kb8 11.Rxb7+ Qxb7 12.Qxd8+ +-) > 3.Re7 Qc6 4.Rxf7 > (4.Bf5+ Kb8 5.Rd6 a5 6.Qb6 Qxb6 7.Rxb6 Ra7 8.Rxf7 +=) > 4...a5 > (4...Kb8 5.Rxg7 Rd8 6.Bf1 Rxd1+ 7.Kxd1 Qf3+ 8.Be2 Qh1+ 9.Kc2 +-) > 5.Qc3 Re8 > (5...Qe6 6.Rxg7 Re8 7.Bg6 Rf8 8.Qd4 Kb8 9.Bf5! Qxf5 10.Qd6+ Ka7 > 11.Rxb7+ Kxb7 12.Qe7+ +-) > 6.Bg6 Qc5 > (6...Kb8 7.Rxg7 Re2 8.Rd8+ Bc8 9.Bf5 +-) > 7.Rxf6 [d]r1k1r3/1b3Rp1/5nBp/p1q5/2P2P2/1PQ5/P6P/2KR4 w - - 0 7 Here Hiarcs prefere clearly 7.Rxg7 than 7.Rxf6 with the line : 7. Rxg7 Re6 8. Qh3 Raa6 9. Bf5 Qa3+ 10. Kb1 Be4+ 11. Bxe4 Nxe4 12. c5 Nxc5 13. Qf5 Nxb3 14. Qd5 Nd2+ 15. Qxd2 Rad6 16. Qc1+ Qxc1+ 17. Rxc1+ Kd8 +- Hiarcs seems to be smarter than fritz 7 (IN THIS POSITION :) ) > (7.Qd3 Rg8 8.Bh7 Rh8 9.Rxg7 Kb8 10.Bg6 Ra6 =) > 7...Re2 8.b4 axb4 9.Qd3 Kb8 10.Qxe2 gxf6 +=] > >1...Kb8 > > [1...Bc6 2.c4 Ndf6 3.h3 Bf3 4.Bf5 Qxf5 5.Re7 +-] > > [1...h5 2.c4 Nc7 3.Qb4 Ne6 4.Bf5 Qc6 5.Rd6 +-] > >2.c4! Nde3 3.Rxe3 Nxe3 4.Qxe3 Re8 5.Be4 Qc8 6.Qb6 Ra7 7.Bb4 Ka8 8.Bc5 Qb8 9.Rd7 >+-
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