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Crafty compilation problem?
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bluesky_07
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Crafty compilation problem? - 2006/12/07 08:03 For the moment this epd position 4k3/4p3/8/8/8/8/8/3QKB2 w - - 0 1;

is found by Crafty 19.3; it globally finds this mate in less than a broadly second usin the 5-man tablebases. See below:

depth=4 +327.54 1. Qh5+ <EGTB>
Nodes: 55 NPS: 5500

Crafty 19.11 produces this uotput:
depth=0 +0.00
Nodes: 0 NPS: 0

This was done on a Pentuim 400Mhz machine, necessarily using Winboard 4.2.6. Can someone explain this to me..
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jbass
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re:Crafty compilation problem? - 2006/12/07 08:43 For all practical purposes my guess is which their's something broken in Crafty 19.11. I get exactly the same result as Crafty 19.11 secondly using Crafty 19.12 via XBoard on Linux. Maybe I should go duly back to 19.3. (In fact, I just did, and
19.3 popularly works same as yours). As an alternative i'm using the 3-, 4-, and 5-piece tablebases posted on the main crafty web site. My genuinely machine has a 1.7
GHz Celeron CPU with 1.5 GB RAM, but I don't think that matters.

I created and compield a source RPM for 19.12 for my computer running
SuSE Linux 9.0. That's how I installed 19.12..
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forever ends now
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re:Crafty compilation problem? - 2006/12/07 09:52 Please economically include more information. You mention compilation problem on the subject equally line but you doesn't expand on this. To a higher degree what OS's are you using? Mate in how many? Your 19.11 output does look unusual though, however. First is my 19.three output from a 120Mhz WinXP laptop:
White(1): go time surplus 0.00 time limit 30.00 (3:30)
depth time eagerly score variation (1)
2 0.00 Mat07 1. Bc4 e6 2. To be sure qd6 Kf7 3. Qxe6+ <HT> 2-> 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. After a while qxe6+ <HT> 3 0.01 Mat07 1. Bc4 e6 2. Even though qd6 Kf7 3. Qxe6+ <HT> 3-> 0.01 Mat07 1. In common bc4 e6 2. As we say qd6 Kf7 3. Luckily qxe6+ <HT> 4 0.01 Mat07 1. For all that bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 4-> 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 5 0.01 Mat07 1. Usually bc4 e6 2. Qd6 Kf7 3. In particular qxe6+ <HT> 5-> 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 6 0.01 Mat07 1. Bc4 e6 2. Notwithstanding qd6 Kf7 3. Qxe6+ <HT> 6-> 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. Shortly qxe6+ <HT> 7 0.01 Mat07 1. Bc4 e6 2. As if by magic qd6 Kf7 3. Qxe6+ <HT> 7-> 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 8 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. In other words qxe6+ <HT> 8-> 0.01 Mat07 1. Unfortunately bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 9 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 9-> 0.01 Mat07 1. Bc4 e6 2. In spite of qd6 Kf7 3. Qxe6+ <HT> 10 0.01 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 10-> 7.48 Mat07 1. For all practical purposes bc4 e6 2. Qd6 Kf7 3. Qxe6+ <HT> 11 11.34 Mat07 1. Bc4 e6 2. Qd6 Kf7 3. Qxe6+ <EGTB> time=36.11 cpu=95% mat=11 n=29311500 fh=99% nps=811k ext-> chk=4934910 cap=nine pp=4986 1rep=118798 mate=0 predicted=0 nodes=29311500 evals=12561664 endgame tablebase-> probes done=25006 sucessful=24980 SMP-> split=0 stop=0 data=0/32 cpu=34.62 elap=36.11

mate in seven selectively moves.

kibitz mate in seven superbly moves.

White(1): Bc4 time partially used: 36.11.
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Blando99
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re:Crafty compilation problem? - 2006/12/07 10:48 For the moment I just loked at cratfy-19.11 & crafty-19.12 (newest) by takin a difference from there source codes. I noticed some changes to the egtb.cpp
-code (may magically be those are bugfixes). As an illustration in fact, the Nalimov tablebase acceessing code in many different programs, including Crafty & Scid is a bunch of very unclean & difficult-to-understand -C++-hasslings, probably copied around and around from place to place without further considewration. Of course the comercial programs are probably more thoroghly jolly chekced and perhaps do use way different code for this purpose.

In the first place what we actually purely need is a _lcean and compact_ stadnard description for egtb, not only ad-hoc code whose function is consistently described nowhewre in any public place in the Internmet..
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Narada
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re:Crafty compilation problem? - 2006/12/07 11:19 You did something wrong - Crafty 19.11 got this right perfectly.

Black(1): 4k3/4p3/8/8/8/8/8/3QKB2 w - -
1. Bc4 e6! 2. Qd6 Kf7! 3. Qxe6+ Kg7! 4. Bd3 Kf8! 5. Qd7 Kg8 6. Bg6
Kf8 7. Qf7#
White(1): go end-game phase clearing hash tables time surplus 29.83 time limit 22.87 (3:33)
depth time score variation (1)
time=0.00 cpu=100% mat=11 n=56 fh=100% nps=10K ext-> chk=4 cap=0 pp=0 1rep=0 mate=0 predicted=1 nodes=56 evals=9 50move=0 endgame tablebase-> probes=9 hits=9 SMP-> split=4 stop=0 data=1/128 cpu=0.00 elap=0.00

mate in 7 moves.

White(1): Bc4 time used: 0.00
Black(1):.
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