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Subject: Re: (Supposed) Mate in 25 => Kasparov v. World (1999)

Author: Hans Havermann

Date: 19:43:33 02/07/01

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On February 07, 2001 at 01:28:20, Terry McCracken wrote:

>>[D]8/6P1/2q2K2/8/3p4/8/5Q2/2k5 w

>I ran the moves through Fritz6 on a P-III 500, infinate analysis, letting it
>decide what was the best move and it took it a while with me forcing moves to
>announce mate.
>However it did find a mate this way in 27 moves, so I would think Kasparov +
>Deep Junior we're right in claiming checkmate within 25 or 26 moves.

I took a slightly different tack. I let William Bryant's Screamer (b55), with
5-piece TBs, run for 24 hours and took the position after 1. Kg5 Qd5+ 2. Qf5
Qg2+ 3. Qg4 Qd5+ 4. Kf4 Qd6+ 5. Kf3 Qc6+ 6. Kf2 Qc2+ 7. Kg1 (a seemingly
reasonable length of its output after that time) as input for new analysis. The
remainder of the game would then run (I think) 7. ...d3 8. Qf4+ d2 9. g8=Q Qd1+
10. Kg2 Qe2+ 11. Kh3 Qd3+ 12. Kh4 Kb2 13. Qb4+ Kc1 14. Qgc4+ Qc2 15. Qxc2+ Kxc2
16. Qc4+ Kb2 17. Qd3 Kc1 18. Qc3+ Kd1 19. Kg4 Ke2 20. Qc2 Ke3 21. Kf5 Kd4 22.
Qxd2+ Kc4 23. Ke6 Kb5 24. Kd6 Kc4 25. Kc6 Kb3 26. Kb5 Ka3 27. Kc4 Ka4 28. Qb4#



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