Author: Paul
Date: 13:57:11 02/05/01
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On February 05, 2001 at 15:07:40, Steffen Jakob wrote: >Hi Paul! > >Thank you for the positions. > >>4k3/8/1p1p4/pPpPp1p1/P1P1PpPp/5P1P/2BB4/K7 w - - id White Wins; bm Bxf4 > >I don't see the win after Bxf4 gxf4. Therefore Bxf4 isn't better than other >moves. You're absolutely right! Silly me ... and the funny thing is (I just looked this up in the archives of CCC), it appears to be from message 47367 by ... Steffen Jakob!! :) You said: "Is there a program which sees that white cannot break through blacks pawn wall (with knowledge and not with depth)?" Sorry! >>5rk1/5p2/pr2pPp1/Pp1pP1Pp/1PpP3P/K1P5/8/8 w - - id Draw; am axb6 > >Hossa doesn't solve this. My experimental code doesnt work at the moment for >positions where its weak side to move. Ok ... >>8/8/8/1k3p2/p1p1pPp1/PpPpP1Pp/1P1P3P/QNK2NRR w - - id WW; bm Kd1 > >Same as in the first position: I dont see a win here. Black simply doesnt take a >white piece. Hmmm, also looked this one up ... there is a very deep win here, goes something like this: 1. Kd1 Kb6 2. Rg2 Kc6 3. Re2 Kb6 4. Rg1 Kc6 5. Rgg2 Kb6 6. Ke1 Ka6 7. Kf2 Kb6 8. Re1 Ka6 9. Rc1 Kb6 10. Ke1 Ka6 11. Re2 Kb6 12. Kd1 Ka6 13. Re1 Kb6 14. Rc2 Ka6 15. Kc1 Kb6 16. Qa2 bxa2 17. b4 a1=Q 18. Rb2 Kb5 19. Rd1 Kb6 20. b5 Kc7 21. b6 But it's just too deep I think, something to look at again in 5/10 years :) >>3k2r1/5b2/2p5/rpPp1p1p/pP1PpPpP/P3P1P1/3K4/8 w - - id Draw; am bxa5 > >Same as in the 2nd position. > >>8/3k3p/5p2/p1p1pPpP/PpPpP1P1/RP1P4/8/5K1R w - - id WW; bm h6 > >At least Hossa would play h6 here :-) > > depth value time nodes pv > 1 +12.39 0.08 2 1.a3a2 > <1> +12.39 0.08 16 1.a3a2 > 2 +12.35 0.08 27 1.a3a2 d7c6 > <2> +12.35 0.10 54 1.a3a2 d7c6 > 3 +12.46 0.10 118 1.a3a2 d7c6 2.f1g2 > <3> +12.46 0.10 309 1.a3a2 d7c6 2.f1g2 > 4 +12.46 0.11 433 1.a3a2 d7c6 2.f1g2 c6d6 > <4> +12.46 0.12 729 1.a3a2 d7c6 2.f1g2 c6d6 > 5 +12.52 0.15 1319 1.a3a2 d7c6 2.f1g2 c6d6 3.g2f3 > <5> +12.52 0.22 3218 1.a3a2 d7c6 2.f1g2 c6d6 3.g2f3 > 6 +12.52 0.23 4097 1.a3a2 d7c6 2.f1g2 c6d6 3.g2f3 d6c6 > <6> +12.52 0.28 6680 1.a3a2 d7c6 2.f1g2 c6d6 3.g2f3 d6c6 > 7 +12.52 0.39 11592 1.a3a2 d7c6 2.f1g2 c6d6 3.g2f3 d6c6 > 4.h6 > <7> +12.52 0.61 21864 1.a3a2 d7c6 2.f1g2 c6d6 3.g2f3 d6c6 > 4.h6 >? 8 +7.36 1.26 70387 1.a3a2 h6 2.h1h2 d7c6 3.a2a3 b4xa3 > 4.h2a2 c6d6 5.a2xa3 >? 9/8 +7.39 1.67 100125 1.h6 b4xa3 2.f1g2 d7c6 3.h1a1 c6d6 > 4.a1xa3 d6c6 >? <8> +7.39 1.69 101058 1.h6 b4xa3 2.f1g2 d7c6 3.h1a1 c6d6 > 4.a1xa3 d6c6 This last one is the real test of course, and you solve it ... impressive! Thanks for trying them ... I'll be more careful picking positions the next time around, I promise :) Groetjes, Paul
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