Author: Uri Blass
Date: 05:14:27 12/29/02
Go up one level in this thread
On December 29, 2002 at 07:51:25, Drexel,Michael wrote: >On December 29, 2002 at 05:45:00, John Lowe wrote: > >>On December 29, 2002 at 00:26:50, Les Fernandez wrote: >> >>>[D]4k3/8/8/8/8/2P5/1PPP4/4K3 w - - >>> >>>The above pawn structure to the best of my knowledge can't ever be reached since >>>the c3 pawn would have had to come from either b2-c2-d2. Are there alot of >>>these type of positions or are there a handful of pawn structures that we know >>>can't happen? Perhaps someone knows of a link that discusses this or can shed >>>"some" light as to what types of structures I can be made aware of. I am >>>working on an idea to increase our data in the C.A.P project for which an >>>understanding on reachable pawn positions is important. Any input that you can >>>provide me with would be deeply appreciated. It may be that there are so many >>>various scenario's that I might just have to leave out this portion of what I am >>>trying to do and just work with the other entities but I would prefer to work >>>pawns into my idea if possible. >>> >>>Thanks, >>> >>It is possible to get, within the rules - not the sensible game - a white pawn >>on a2,a3,a4,a5,a6 and a7 >> >>This will "cost" 15 captures leaving no capturable pieces for the g2 and h2 >>pawns. It will involve making king-side black pawns available for capture by >>sacrificing white pieces to them - it will take some analysis to discover how >>but my guess is that it can be done. >> >>Migrations bigger than this will be outside the rules. >> >>Does this help >> >>>Les ? >> >>Regards >> >>John > >Sorry John but this can not be done: > >[D] k7/P7/P7/P7/P7/P7/P7/K7 w - - 0 1 > >This pawn structure can not be reached within the rules. >The problem is: >you have not enough white pieces available in order to sacrifice them to make >all black king-side pawns available. It just happened in a game that I played against myself in 10 minutes Sorry for the low level of the moves but I am not good at blitz(;_ [Event "Edited game"] [Site "URI-PC"] [Date "2002.12.29"] [Round "-"] [White "-"] [Black "-"] [Result "*"] 1. h4 a5 2. h5 a4 3. Nf3 a3 4. bxa3 b5 5. Rh3 b4 6. Nd4 b3 7. cxb3 Ra4 8. bxa4 c5 9. g3 c4 10. Bg2 c3 11. dxc3 Qa5 12. Bf3 Na6 13. Bg2 Nb4 14. cxb4 d5 15. bxa5 Nf6 16. Nb3 d4 17. g4 d3 18. exd3 Ba6 19. g5 Nxh5 20. Rg3 Bc4 21. dxc4 e5 22. Rh3 e4 23. Rg3 e3 24. fxe3 Bc5 25. Rh3 Nf6 26. Rg3 Bd4 27. exd4 Ke7 28. Bd2 Ne4 29. Bc1 Nxg5 30. Bd2 Ne4 31. Bc1 Nc5 32. dxc5 h5 33. Bd2 h4 34. Bc1 h3 35. Be3 h2 36. Bg1 h1=Q 37. N1d2 Rb8 38. Nf3 Rb6 39. cxb6 g5 40. Qb1 Kd7 41. Qb2 Kc8 42. Qb1 Kb7 43. Qb2 Ka8 44. Qb1 Qh8 45. Qb2 Qb8 46. Qb1 Qa7 47. bxa7 g4 48. Qd3 gxf3 49. Qd7 fxg2 50. Qb7+ Kxb7 51. Bf2 g1=Q+ 52. Kd2 Qxf2+ 53. Kd3 Qxg3+ 54. Kd2 f5 55. Rg1 Qxg1 56. Kc2 f4 57. Kd2 f3 58. Kc2 f2 59. Kd2 f1=Q 60. Kc2 Qc5 61. Kd2 Qb5 62. cxb5 Qf6 63. Kc2 Qe6 64. Kb2 Qxb3+ 65. Kc1 Qe6 66. Kb2 Qd6 67. Ka1 Qa6 68. bxa6+ Ka8 * Uri
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