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Subject: Re: number of pawn positions in chess...(updated)

Author: Dan Ellwein

Date: 04:36:06 01/26/00

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On January 26, 2000 at 03:02:09, Jeremiah Penery wrote:

>On January 25, 2000 at 19:33:39, Dan Ellwein wrote:
>
>>this total will be reduced by the number of illegal pawn formations associated
>>with each of the 24 groups...
>>
>>ie
>>
>>[D]4k3/8/8/8/8/6PP/7P/4K3 w - -
>>
>>is one example...
>
>This isn't an illegal pawn configuration.  I constructed a (stupid) game to show
>that it is reachable:
>
>1. a4 c6 2. c4 b5 3. axb5 cxb5 4. cxb5 a6 5. bxa6 Rxa6 6. Rxa6 Nxa6 7. b4
>Nxb4 8. Ba3 Qb6 9. Bxb4 Qxb4 10. Nc3 Qxc3 11. dxc3 d5 12. c4 dxc4 13. Qc2
>Ba6 14. Qxc4 Bxc4 15. e4 Bxf1 16. Kxf1 f5 17. exf5 e6 18. fxe6 Nf6 19. e7
>Bxe7 20. Ke2 Rf8 21. Nf3 Ne4 22. Nd4 Ng5 23. Ne6 Nh3 24. gxh3 Rf3 25. Rg1
>Rg3 26. fxg3 Bc5 27. Nxc5 Ke7 28. Rf1 Ke8 29. Rf7 Kd8 30. Rxg7 Ke8 31. Rxh7
>Kf8 32. Rf7+ Kxf7 33. Ne6 Kxe6 34. Kf2 Ke7 35. Ke1 Ke8

Jeremiah... you are right... the position should be...

[D]4k3/8/8/8/8/7P/6PP/4K3 w - -





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