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Subject: Problem with Rybka 1.01 ??

Author: Barry Culp

Date: 10:28:48 12/22/05

I just got my copy of Rybka 1.01 and the first position I tried to
analyze has a possible problem ? I am using the Fritz 9 GUI on a
P4 3.6 ghz with 512mb hash in infinite analysis mode.

The older version Rybka 1.0 switches from  Rh5 (-4.11) to Ke2 (-.80) in 7:16
at ply 15.

The newer version Rybka 1.01 stays on Rh5 ply 13 and doesnt make
any more progress after 30 minutes ??? I was able to reproduce
this "problem" a second time. I even tried booting my PC after each analysis.

Can anyone with Rybka 1.01 reproduce my results ??


[D] r6k/6p1/pq1pB1Pp/2nP1R2/2Q2p2/P1R2P2/2PK3P/1r6 w - - 0 1


Analysis by Rybka 1.0 Preview 32-bit:

34.Rh5 Nxe6 35.dxe6 Re8 36.Rb3 Qf2+ 37.Qe2 Qxe2+ 38.Kxe2 Rg1 39.Kd3 Rxg6
  ³  (-0.30)   Depth: 11   00:00:13  687kN
34.Rh5 Nxe6 35.dxe6 Re8 36.Rb3 Qf2+ 37.Qe2 Qxe2+ 38.Kxe2 Rg1 39.Kd3 Rxg6 40.Rf5
  ³  (-0.33)   Depth: 12   00:00:25  1354kN
34.Rh5 Nxe6 35.dxe6 Re8 36.Rb3 Qf2+ 37.Qe2 Qxe2+ 38.Kxe2 Rg1 39.Kd3 Rxg6 40.Rf5
Rgxe6
  ³  (-0.33)   Depth: 13   00:00:46  2558kN
34.Rh5 Nxe6 35.dxe6 Re8 36.Rf5 Qg1 37.Qe2 Qxg6 38.Rxf4 Rxe6 39.Rc8+ Kh7 40.Qd3
  ³  (-0.48)   Depth: 14   00:01:29  5272kN
34.Rh5 Nxe6 35.dxe6 Qf2+ 36.Qe2 Qd4+ 37.Rd3 Qg1 38.Rc3 Rf1 39.Ra5 Rf2 40.Rxa6
Rxe2+
  -+  (-4.11)   Depth: 15   00:04:10  14311kN
34.Ke2 Re8 35.Qxf4 Nxe6 36.dxe6 Rxe6+ 37.Kd2 Qf2+ 38.Kd3 Qe2+ 39.Kd4 Rd1+ 40.Rd3
Rxd3+
  µ  (-0.80)   Depth: 15   00:07:16  23074kN


Analysis by Rybka 1.01 Preview 2 32-bit:

34.Rh5 Nxe6 35.dxe6 Re8 36.Rb3 Rxb3 37.cxb3 Qe3+ 38.Kc2 Rxe6 39.Qc8+ Re8 40.Qb7
  ³  (-0.41)   Depth: 11   00:00:11  1588kN
34.Rh5 Nxe6 35.dxe6 Re8 36.Rb3 Qf2+ 37.Qe2 Qxe2+ 38.Kxe2 Rg1 39.Rf5 Rxg6 40.Rxf4
  ³  (-0.33)   Depth: 12   00:00:24  3348kN
34.Rh5 Nxe6 35.dxe6 Re8 36.Rb3 Qf2+ 37.Qe2 Qxe2+ 38.Kxe2 Rg1 39.Rf5 Rxg6 40.Rxf4
Rgxe6+
  ³  (-0.40)   Depth: 13   00:00:45  6395kN

No further analysis here after 30 minutes ?? Notice the difference
in node count on plys 11-13 between the 2 versions

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Last modified: Thu, 15 Apr 21 08:11:13 -0700

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