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Subject: Re: Is the queen sac sound?

Author: William Rex

Date: 22:39:53 12/29/03

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New game
8/6pk/4Q2p/3P1P1q/8/6P1/4rP2/2R3K1 w - - 0 1

Analysis by Deep Fritz 8:

1.Qa6--
  +-  (1.51)   Depth: 7/16   00:00:00  57kN
1.Qa6 Rd2 2.Qa5 Rd3 3.f6 Rd1+ 4.Rxd1
  +-  (1.49)   Depth: 7/26   00:00:00  67kN
1.Qa6 Rd2 2.Qa5 Rd3 3.f6 Rxd5 4.Qc7 Qg6 5.Qb7
  ±  (1.30)   Depth: 8/23   00:00:00  129kN
1.Qg6+!
  ±  (1.32)   Depth: 8/23   00:00:00  153kN
1.Qg6+!
  +-  (1.50)   Depth: 8/23   00:00:00  153kN
1.Qg6+ Qxg6 2.fxg6+ Kxg6 3.Rd1 Kf7 4.Kf1 Re7 5.f3
  +-  (1.73)   Depth: 8/23   00:00:00  155kN
1.Qg6+ Qxg6 2.fxg6+ Kxg6 3.Rd1 Re7 4.d6 Rd7 5.f4 Kf6 6.Kf2
  +-  (1.70)   Depth: 9/16   00:00:00  203kN
1.Qg6+ Qxg6 2.fxg6+ Kxg6 3.Rd1 Re7 4.f4 Rd7 5.Kf2 Kf6 6.Kf3
  +-  (1.71)   Depth: 10/19   00:00:00  329kN
1.Qg6+ Qxg6 2.fxg6+ Kxg6 3.Rd1 Re7 4.f4 Rd7 5.Kf2 Kf6 6.Kf3 Rd6
  +-  (1.68)   Depth: 11/21   00:00:00  713kN
1.Qg6+ Qxg6 2.fxg6+ Kxg6 3.Rd1 Re7 4.f4 Rd7 5.Kf2 Kf6 6.Kf3 Rd6 7.Kg4
  +-  (1.68)   Depth: 12/22   00:00:02  1651kN
1.Qg6+--
  ±  (1.40)   Depth: 13/25   00:00:04  3763kN, tb=1
1.Qg6+ Qxg6 2.fxg6+ Kxg6 3.Rd1 Kf7 4.Kf1 Rc2 5.d6 Ke8 6.d7+ Kd8 7.f3 Rc7
  ±  (1.37)   Depth: 13/25   00:00:04  3887kN, tb=1
1.Re1!
  ±  (1.38)   Depth: 13/43   00:00:11  9357kN, tb=7
1.Re1!
  +-  (1.53)   Depth: 13/43   00:00:12  9681kN, tb=8
1.Re1!
  +-  (1.84)   Depth: 13/43   00:00:12  10009kN, tb=8
1.Re1!
  +-  (2.47)   Depth: 13/43   00:00:12  10414kN, tb=8
1.Re1 Rxe6 2.fxe6 Kg8 3.d6 Qa5 4.Re2 Qa1+ 5.Kh2 Qf1 6.d7
  +-  (3.78)   Depth: 13/43   00:00:16  13013kN, tb=8
1.Re1 Rxe6 2.fxe6 Kg8 3.d6 Qa5 4.Re2 Qa1+ 5.Kh2 Qf1 6.d7 Qxe2 7.d8Q+ Kh7 8.e7
Qxf2+ 9.Kh3 Qf1+ 10.Kg4 Qc4+
  +-  (3.78)   Depth: 14/42   00:00:19  16117kN, tb=8
1.Re1!
  +-  (4.06)   Depth: 15/39   00:00:39  33189kN, tb=16
1.Re1!
  +-  (4.34)   Depth: 16/45   00:01:14  63611kN, tb=51









On December 29, 2003 at 20:44:06, Sune Fischer wrote:

>
>[D]8/6pk/4Q2p/3P1P1q/8/6P1/4rP2/2R3K1 w - - 0 56
>
>In the actual game Frenzee played d6!? and went on to win.
>
>In post mortem analysis it switches to Re1 with a bit more time, still
>sacrificing the queen.
>
>I've been playing a little bit with the eval scores for passed pawns
>and not surprisingly the position is very sensitive to these changes.
>
>Any other engines who wants to sacrifice the queen here, is it sound
>or a lucky punch?
>
>-S.



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