CThinker wrote:[I think no one tests the 'passive' version anymore (the 'inert' version is what testers play with), but here is something from the 'passive' version:
C:\builds\SP-x86-Passive-Thinker.exe
Thinker: 5.4C (NAM 045, 1500) Copyright (c) Kerwin Medina
Thinker: uqe ueh uml
Thinker: Freeware. No warranties whatsoever.
post
setboard 1r4k1/p4ppp/2BPq3/4P2P/3b1P2/1r6/pPQ5/K1B2R2 b - -
go
move b3b4
14 240 981 12063101 b3b4
I also ran this in the debugger just to see the engine's progress. It actually finds it at depth 7 in milliseconds, and sticks with it.
Neither the 'active' version nor the 'inert' version can find it. Both pick the wrong b3c3.
Hi Lance,
I am very sorry about that
but I do not know how to manage it: Testing 3 different versions of an engine with 1CPU, 2CPU and 4CPU - so I would have 9 different engines of Thinker 5.4C to test
So I took the strongest version against engines
Thank´s for the new version
My apologies Werner. I did not mean it to sound like that. I was just alluding to the fact that the 'passive' version is no longer a favorite and has been overshadowed by the 'inert' version.
Personally, my favorite is the 'active' version, just because it is the only one that still has "some" code of mine. The rest are now all Kerwin's contraption.
On my system Deep Rybka 3 64-bit likes Qh3 and stays with it after some 3+ minutes of thought. If Rc3 it played, then Rybka still does not see the drawing line you provide. Your 4. ... Qxc1?? is weak to 4. ... Rxb2!! See key position here:
[d]1r4k1/p4ppp/2BP4/4P2P/3b1P2/2P5/pB6/K1Q2q2 b - - 0 4
Not 4. ... Qxc1?? Winning is 4. ... Rxb2!!
You are right indeed Ted, Rxb2 avoids the losing trap. So 1...Rc3! is winning after all. Gee, clarity after 10+ years
And about 4...Qxc1: After 5.Bxc1 Rb1+ Rybka 2.3 (4-proc) after 27 plies and 10 minutes finally find a positive score. Not that mine does better
CThinker wrote:the 'passive' version is no longer a favorite and has been overshadowed by the 'inert' version.
I believe that the changes from Thinker 5.4a Inert to 5.4c Inert are very minor, whereas the Passive version has had more major changes?
If this is the case, then it would make sense to test Thinker 5.4c Passive this time?
CThinker wrote:the 'passive' version is no longer a favorite and has been overshadowed by the 'inert' version.
I believe that the changes from Thinker 5.4a Inert to 5.4c Inert are very minor, whereas the Passive version has had more major changes?
If this is the case, then it would make sense to test Thinker 5.4c Passive this time?
Cheers, Graham.
The 5.4C release is intended to address the issues with the parallel search. So, you would see improvements mostly if you try the SMP versions.
If you just want to know which Thinker version is best against other engines, it would still be the 'inert' version.
CThinker wrote:the 'passive' version is no longer a favorite and has been overshadowed by the 'inert' version.
I believe that the changes from Thinker 5.4a Inert to 5.4c Inert are very minor, whereas the Passive version has had more major changes?
If this is the case, then it would make sense to test Thinker 5.4c Passive this time?
Cheers, Graham.
The 5.4C release is intended to address the issues with the parallel search. So, you would see improvements mostly if you try the SMP versions.
If you just want to know which Thinker version is best against other engines, it would still be the 'inert' version.
rebel777 wrote:[d]1r4k1/p4ppp/2BPq3/4P2P/3b1P2/1r6/pPQ5/K1B2R2 b - - am Rc3;
This is a sub-variation of the game Anand - Rebel 10 (1998). I wonder if any of the nowadays top programs can avoid 1..Rc3 which eventually leads to a draw.
[d]1r4k1/p4ppp/2BPq3/4P2P/3b1P2/1r6/pPQ5/K1B2R2 b - - am Rc3;
The Baron initially wants Bxb2 and exchange down to the endgame. Not sure whether this is really a good line, or whether it is dreaming.
After 1..Bxb2 2.Bxb2 Rxb2 3.Qxb2 Rxb2 4.Kxb2 Kf7 the following position is reached:
[d]5k2/p4ppp/2BPq3/4P2P/5P2/8/pK6/5R2 w - -
When searching in this position, Baron's score slowly starts to rise (on slow machine):
From the initial test position, the Baron switches to R3b4 and Qh3 (alternating between them) from ply 10 onwards. Rc3 is never displayed as the main continuation.
Richard.
