Search found 1065 matches

by Ras
Sun May 28, 2017 5:09 pm
Forum: Chess Players Forum
Topic: Philidor IV
Replies: 20
Views: 8241

Re: Philidor IV

also, if black has 40cps edge after the knight capture, there is certainly no compensation. If there were no compensation at all, I would expect black to have an edge of 100cps, the material value of the pawn. I've been digging a bit deeper through the variants to include this gambit as passive kno...
by Ras
Sat May 27, 2017 10:18 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is AlphaGo approach unsuitable to chess?
Replies: 19
Views: 10834

Re: Is AlphaGo approach unsuitable to chess?

Given the complexity (branching factor) of Go, why is this approach not suitable to Chess? Because chess is way more tactical. One piece one square further can decide everything. This is bad for neuro networks because they are designed to give a similar result for similar input (pattern recognition...
by Ras
Sat May 27, 2017 7:01 pm
Forum: Chess Players Forum
Topic: Philidor IV
Replies: 20
Views: 8241

Re: Philidor IV

of course, as Gerold suggests, Ng4. I do not see any compensation for the pawn. I do - the open g file and the rook on said file. Probably, that isn't enough compensation, but at least some. The main issue for Black is that castling kingside is out of question, and castling queenside takes more tim...
by Ras
Sat May 27, 2017 1:31 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: AOCC 1.0 (AMD Optimizing C/C++ Compiler)
Replies: 2
Views: 1177

Re: AOCC 1.0 (AMD Optimizing C/C++ Compiler)

Now test with chess engines to see if there are improvements Phoronix did that with TSCP - hardly any improvement over GCC 6.3 and inferior to CLANG 5. http://www.phoronix.com/scan.php?page=article&item=amd-ryzen-aocc&num=3 It's interesting, however, that GCC 7 is slower than GCC 6.3, and GCC 8 eve...
by Ras
Fri May 26, 2017 1:41 am
Forum: Computer Chess Club: General Topics
Topic: is white lost in this position ... 14.0-0-0 ...
Replies: 7
Views: 1558

Re: is white lost in this position ... 14.0-0-0 ...

9. Ng5 is the beginning of a wrong plan. From that move onwards, the game goes downhills. White does not have development advantage. Plus that White does not control the centre. There is nothing that would suggest a piece sacrifice. The open h file alone does not cut because the queen is too far awa...
by Ras
Thu May 25, 2017 1:29 pm
Forum: Computer Chess Club: General Topics
Topic: Is 32-bit obsolete?
Replies: 12
Views: 4321

Re: Is 32-bit obsolete?

I have Win7-64 on my desktop machine and Win7-32 on my netbook. Plus that my chess target hardware runs a 32 bit ARM Cortex-M4 (no operating system).
by Ras
Tue May 23, 2017 12:45 am
Forum: Computer Chess Club: General Topics
Topic: Skipper update
Replies: 47
Views: 9472

Re: Skipper update

Probably because of hash tables, that can cut off a PV. Who cares, it's the move being played that counts.

That said, still wondering whether a micro-controller system can beat Skipper. Can I get an EXE file? 8-)
by Ras
Tue May 23, 2017 12:39 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Your favorite crash
Replies: 21
Views: 5275

Re: Your favorite crash

My engine simply does not crash. But only after debugging stability issues, and in that one, my favourite was illegal addressing. NG-Play still has a hash table bug where an out-of-bounds write may occur. I have converted the dynamic alloc to static alloc, and in this scenario, the out of bounds wri...
by Ras
Tue May 23, 2017 12:26 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Your favorite crash
Replies: 21
Views: 5275

Re: Your favorite crash

What would be the best method or code insertion for testing stack overflow? Since my chess system is based on a micro-controller, stack overflow is much more of a threat than with PC systems. I'm using two methods: 1) I call GCC with the option -fstack-usage. That gives me the stack usage for each ...
by Ras
Thu May 18, 2017 10:30 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: horrid positional play in a solid tactical searcher
Replies: 18
Views: 6084

Re: horrid positional play in a solid tactical searcher

Henk wrote:Was just a joke. Engine is kept private to not inflict psychic damage to others.
Too bad, I would have liked to do a game with Skipper on a PC at 3.7 GHz (single-thread) against the CT800 on a Cortex-M4 microcontroller at 168 MHz. :D