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Subject: Re: By Matous-1975. An incredible position!

Author: Anthony Cozzie

Date: 22:08:05 04/03/03

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On April 03, 2003 at 17:35:16, George Tsavdaris wrote:

>Is there any engine can find the right move in this incredible position
>in a reasonable time? All the engines i tried on my 1500 MHz PC failed.
>Even Fritz 8 after 20 minutes didn't find the move.
>
>The amazing move is  1.Bc7!! After that 1...Qxc8 is forced. 1...Qxc8
>2.gxf7+ Kh8 [2...Kf8 3.Bd6#]
>3.Be5 Qc5 The only move.
>4.Bb2!  Nc7 Again the only move.
>5.Ba1 a4 6.Bb2 a3 7.Ba1 a2 8.Bb2 a1Q 9.Bxa1 And black has no other moves! 1-0
>
>[D]n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1

A *very* tough position!

Root:
1. gxh7 Kh8 2. Qxa8 a4 3. Qd5 Qf8 4. Ke5 Kxh7 5. Qd3 Kg8 6. Bf6 Qb8 7. Kf5 Qc8
8. Kf4 Qc1 9. Kg3
 = (2.68)       Depth: 14       00:32:59.84     752994kN

After forcing Bc7 Qxc8:
1. gxf7 Kh8 2. Be5 Qc5 3. Bb2 Nc7 4. Ba1 a4 5. Bb2 a3 6. Ba1 a2 7. Bb2 a1=Q 8.
Bxa1 Nb5 9. Ke6 Nc3 10. Bxc3 Qxc3 11. f8=Q
 =   MAT10      Depth: 16       00:04:50.02     107802kN

So it looks like this position would require an 18 ply search, or ~10 hours for
Zappa (AMD 1.5GHZ)

anthony



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