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Subject: Did Shredder blunder? Deep Fritz 8 says that 23.h4 was a bad mistake

Author: Albert Silver

Date: 08:03:59 08/15/04

Go up one level in this thread


On August 15, 2004 at 10:43:42, S J J wrote:

>On August 15, 2004 at 10:29:30, Vincent Lejeune wrote:
>
>>[Event "55'/40+30'"]
>>[Site "MyTown"]
>>[Date "2004.08.15"]
>>[Round "?"]
>>[White "New game"]
>>[Black "Hydra/Chimera-1.12aC"]
>>[Result "*"]
>>[ECO "B97"]
>>[Annotator "Hydra"]
>>[PlyCount "33"]
>>[EventDate "2004.??.??"]
>>[TimeControl "40/3300:1800"]
>>
>>{4MB, HydraLutzWhite_v5.ctg, CHESS2} 1. e4 {[%emt 0:00:00]} c5 {[%emt 0:00:00]}
>>2. Nf3 {[%emt 0:00:48]} d6 {[%emt 0:00:00]} 3. d4 {[%emt 0:00:24]} cxd4 {
>>[%emt 0:00:00]} 4. Nxd4 {[%emt 0:00:18]} Nf6 {[%emt 0:00:00]} 5. Nc3 {
>>[%emt 0:00:16]} a6 {[%emt 0:00:00]} 6. Bg5 {(Be2) [%emt 0:00:15]} e6 {
>>[%emt 0:00:00]} 7. f4 {[%emt 0:00:13]} Qb6 {[%emt 0:00:00]} 8. Nb3 {
>>[%emt 0:00:16]} Be7 {[%emt 0:00:00]} 9. Qf3 {(Be2) [%emt 0:00:19]} Nbd7 {
>>[%emt 0:00:00]} 10. O-O-O {[%emt 0:00:23]} Qc7 {[%emt 0:00:00]} 11. Kb1 {
>>(Be2) [%emt 0:00:17]} b5 {[%eval -13,16] [%emt 0:01:44]} 12. Bd3 {
>>(a3) [%emt 0:00:09]} b4 {[%eval -43,16] [%emt 0:01:42]} 13. Ne2 {[%emt 0:00:07]
>>} Bb7 {[%eval -47,16] [%emt 0:03:22]} 14. Qh3 {(Bxf6) [%emt 0:00:07]} Nxe4 {
>>[%eval -83,16] [%emt 0:02:00]} 15. Bxe7 {[%emt 0:00:10]} Kxe7 {
>>[%eval -93,16] [%emt 0:01:57]} 16. Qh4+ {(Rhe1) [%emt 0:00:09]} Ndf6 {
>>[%eval -95,17] [%emt 0:03:21]} 17. Rhe1 {[%emt 0:01:46]} *
>
>
>Fritz eval is -.81!
>Has 14. Ng3 instead of Qh3 as the better move.

Here is the position after 22...a5

[D]r6r/2q1kpp1/3p3p/p3pPnQ/1p6/3B4/PPPN2bP/1K1RR3 w - - 0 23

Deep Fritz 8 was quite happy with 23.h4 until ply 13 in its analysis but then
changed its mind at ply 14 and said it was a bad mistake. Shredder played it all
the same, so the question is who is right?

Analysis by Deep Fritz 8:

23.h4 Nh7 24.Qg4 Bd5 25.Qxg7
  +-  (1.54)   Depth: 7/23   00:00:00  75kN
23.h4 Nh7 24.Qg4 Bd5 25.Qxg7
  +-  (1.54)   Depth: 8/25   00:00:00  134kN
23.h4--
  ±  (1.26)   Depth: 9/29   00:00:00  259kN
23.h4 Nh7 24.Rg1 Nf6 25.Qe2 Bd5 26.Rxg7 Kf8 27.Rdg1
  ²  (0.30)   Depth: 9/30   00:00:00  616kN
23.Re2!
  ²  (0.30)   Depth: 9/30   00:00:01  1122kN
23.Re2--
  =  (0.02)   Depth: 10/27   00:00:03  2764kN
23.Re2 Bd5 24.Qg4 Kf8 25.h4
  =  (-0.10)   Depth: 10/28   00:00:04  3267kN
23.h4
  =  (-0.10)   Depth: 10/28   00:00:04  3417kN
23.h4
  =  (0.06)   Depth: 10/28   00:00:04  3482kN
23.h4 Nh7 24.Rg1 Nf6 25.Qe2 Bd5 26.Rxg7 Kf8 27.Rdg1
  ²  (0.30)   Depth: 10/28   00:00:04  3772kN
23.h4 Nh7 24.Rg1 Nf6 25.Qe2 Bd5 26.Rxg7 Kf8 27.Rdg1
  ²  (0.30)   Depth: 11/30   00:00:08  7220kN
23.h4 Nh7 24.Rg1 Nf6 25.Qe2 Bd5 26.Rxg7 Kf8 27.Rdg1
  ²  (0.30)   Depth: 12/29   00:00:15  13408kN
23.h4 Nh7 24.Rg1 Nf6 25.Qe2 Bd5 26.Rxg7 Kf8 27.Rdg1
  ²  (0.30)   Depth: 13/35   00:00:33  32253kN
23.h4--
  =  (0.02)   Depth: 14/36   00:01:06  65533kN
23.h4 Nh7 24.Rg1 Nf6 25.Qe2 Bd5 26.Rxg7 a4 27.Be4 b3 28.cxb3 axb3
  ³  (-0.40)   Depth: 14/39   00:01:29  89780kN
23.Rg1
  ³  (-0.39)   Depth: 14/39   00:03:33  214843kN
23.Rg1 Qc6 24.Qe2 Bf3 25.Nxf3 Qxf3 26.Qe1 Qf4 27.Rf1 Qxh2 28.Be4 Nxe4 29.Qxe4
  ³  (-0.34)   Depth: 14/39   00:04:13  254594kN
23.Qg4
  ³  (-0.34)   Depth: 14/39   00:04:52  295775kN
23.Qg4
  =  (-0.18)   Depth: 14/39   00:05:17  320678kN
23.Qg4 Bh3 24.Qh4 b3 25.axb3 a4 26.Re3 Bg2 27.Qg3 Qa7 28.f6+
  =  (-0.08)   Depth: 14/39   00:05:48  352507kN



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