Author: KarinsDad
Date: 14:01:03 03/01/00
Go up one level in this thread
On March 01, 2000 at 11:43:59, Martin wrote: >Hello KarinsDad :) Howdy! [snip] > >I think wasting time with Ba1-b2-a1 is just too slow. White needs its pawns >closer to the 8th rank. Now let's get concrete. > >1...Kf5 2.Ba1 Bf1 3.Bb2 Be2 4.Ba1 h2 5.Kxh2 Kf4 6.Kg2 So far we agree. > >6...Ke3 Not Bxf3, Black has to control the d2 square in order to keep the wK >away. > >7.f4 Or do you want to play c4 right now? (7.c4 dxc4 8.f4 Kd2 9.f5 c3 10.f6 c2 >11.f7 c1D 12.f8D and the a-pawn is killing white...) > >7...Bd3 8.Kg3 (8.c4 dxc4 9.Bc3 Pushing the pawns forward gives nothing since the >bB controls the diagonal c8-h3 and f5, while the bK goes to d2. 9...Be4+ then >Kd3 and the c-pawn wants to become a girl. White is too slow.). > >8...Kd2 9.Kg4 Anything else but trying to support the f-pawn is even worse. The >square g4 is suboptimal but there's no better one... > >9...Kc2 Is it now okay to play c4? (black threatens Kb1) Let's try it. > >10.c4 (10.f5 Bxf5+ and the a-pawn queens) 10...dxc4 Now the pawn race starts, >you're right. But it's black who has the pole position here. 1...Kf5 2.Ba1 Bf1 3.Bb2 Be2 4.Ba1 h2 5.Kxh2 Kf4 6.Kg2 6...Ke3 7.f4 Bd3 8.Kg3 Kd2 9.Kg4 Kc2 10. f5 Bxf5+ 11. Kxf5 Kb1 12. c4 dxc4 13. Bh8 a1(Q) 14. Bxa1 Kxa1 15. d5 c6 16. d6 c7 17. d7 c8 (Q) 18. d8 (Q) This line appears to be a draw. Is there a way to avoid it? Probably, but it is not obvious. So although I agree that this might be a won position for black, it has not yet been shown to be the case. 10. f5 Kb1 11. f6 Bg6 12. c4 dxc4 13. Be5 a1(Q) 14. Bxa1 Kxa1 15. d5 c6 16. d6 Be8 17. d7 Bxd7 18. f7 c7 19. f8 (Q) c8 (Q) So, although there are other lines here, none of them appear to win for black and result in a draw (maybe). So, my only point is that this is not even clearcut for humans, let alone for computers. You'll notice that we are looking down 30+ ply. Not so easy, even for humans. KarinsDad :)
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