Author: Drexel,Michael
Date: 05:29:18 12/29/02
Go up one level in this thread
On December 29, 2002 at 08:14:27, Uri Blass wrote: >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 Nice game Uri, just forgot the possibility to promote the pawns. at least it can not be reached without promotion. Michael
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