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Subject: Re: Transposition into won endgame

Author: Mike S.

Date: 02:21:06 01/31/04

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On January 30, 2004 at 17:51:32, Kurt Utzinger wrote:

>The position below is from a 90m+30s game between
>Shredder8 and ChessTiger15 in which White easily
>won with 45.Qf6 and an won pawn ending.

Another one, where White even gives a bishop to being exchange queens and
transpose into a won pawn endgame (KPP-KPP only). It occured in a game Crafty
17.14 - Delfi 4.2, 40/10m P3/700 MHz. IIRC, only 4-piece tbs. were available.

[D]8/8/2q1k3/1p2B3/3Q4/PKP5/1P6/8 w - - 0 86

86.Qd6+!

I don't know if it's the fastest way to mate (I guess so), but also Qd6+ is
human-like IMO, because after the very simple

86. Qd6+ Qxd6 87. Bxd6 Kxd6 88. a4

it's very easy for White. So no need to deal with "endless" counter-checks from
a black queen...

Analysis by Crafty 19.06, P3/700 MHz:

86.Kb4 Qb7 87.Qc5 Kf5 88.Qxb5 Qa8 89.Bd6+ Kg6 90.Qd3+ Kf6 91.Qd4+ Kf7 92.a4
  +-  (7.84)   Depth: 1/7   00:00:00
  +-  (9.50)   Depth: 10/25   00:00:10  3613kN, tb=9
86.Qd6+ Qxd6 87.Bxd6 Kxd6 88.Kb4 Kc6 89.a4 Kb6 90.b3 Kc6 91.a5 Kd6 92.Kxb5 Kd5
93.a6
  +-  (10.58)   Depth: 10/25   00:00:11  3747kN, tb=13
  +-  (11.44)   Depth: 13/32   00:00:22  8183kN, tb=223

Regards,
Mike Scheidl



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