Search found 244 matches

by silentshark
Mon Jan 27, 2020 7:44 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: 78th Amateur Series Division 4
Replies: 2
Views: 131

Re: 78th Amateur Series Division 4

Gulp! That looks too tough a field for Francesca to survive. We shall see.
by silentshark
Thu Jan 23, 2020 8:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is razoring useless in modern engines ?
Replies: 10
Views: 914

Re: Is razoring useless in modern engines ?

To balance this, for my engine (Francesca - older, weaker than some mentioned), razoring does have a value. I just ran 10000 games of my dev version vs a version without razoring. Version with razoring was +9 ELO. I don't use probcut. This has given me a nudge. I'm going to look at razoring again, a...
by silentshark
Sat Jan 11, 2020 12:30 pm
Forum: Computer Chess Club: General Topics
Topic: New engine releases 2020
Replies: 56
Views: 6529

Re: New engine releases 2020

Today, I'm releasing a new version of my Winboard engine, Francesca. This is version 0.27. You can grab from my website, www.silentshark.co.uk Changes, as per readme.txt file Again, lots of small changes. Tweak to piece values to help value queen higher. Tweak to root LMR. Make sure checks right nea...
by silentshark
Sun Dec 29, 2019 5:22 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Microsoft Visual C vs Gcc on Windows
Replies: 4
Views: 444

Re: Microsoft Visual C vs Gcc on Windows

Fabio Gobbato wrote:
Sun Dec 29, 2019 4:23 pm
With gcc you can use also -flto when compiling and when linking.
Thanks, will take a look
by silentshark
Sun Dec 29, 2019 4:17 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Microsoft Visual C vs Gcc on Windows
Replies: 4
Views: 444

Microsoft Visual C vs Gcc on Windows

..just seeing if I can squeeze some extra performance, so I'm taking a look at gcc.

When it comes to performance using these compilers, what are others finding? Also, for gcc what optimisation flags are folks using? For reference, I am using -O3 and -march=native

Regards,
Tom
by silentshark
Sun Dec 29, 2019 9:09 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: ELO value of TTSE?
Replies: 5
Views: 613

ELO value of TTSE?

Hello all, Many strong engines seem to use the restricted version of singular extensions, just extending the move from the hash table in certain circumstances. To engine authors - what ELO increase do you see when using this? (Context - I'm going to look again, but experiments a few weeks ago showed...
by silentshark
Tue Dec 10, 2019 7:39 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan 22.0
Replies: 11
Views: 1029

Re: Arasan 22.0

I attempted to download the engine and book zip file from here: http://www.arasanchess.org/arasan22.0.zip and W10 security flagged it as having the "Trojan:Win32/Wacatac.B!ml" treat in the arasanx-32.exe file. has anyone else had the same problem? Virustotal shows two AV engines detecting this as m...
by silentshark
Sat Nov 30, 2019 5:22 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Probing the transposition table at depth 0
Replies: 5
Views: 549

Re: Probing the transposition table at depth 0

jstanback wrote:
Sat Nov 30, 2019 4:35 pm
In Wasp I get some benefit by storing positions in Qsearch at depth=0, but only if a move increased alpha. I probe the hash table for depth >= 0.

John
For me, just probing (not storing) in Qsearch was best, but not a lot in it.
by silentshark
Mon Nov 11, 2019 9:34 pm
Forum: Computer Chess Club: General Topics
Topic: Francesca 0.26 Released
Replies: 3
Views: 501

Re: Francesca 0.26 Released

Damir wrote:
Mon Nov 11, 2019 8:36 pm
Thanks Tom. Do you have Jerry there with you too somewhere ? :) :) :wink:
:D
by silentshark
Mon Nov 11, 2019 7:12 pm
Forum: Computer Chess Club: General Topics
Topic: New engine releases 2019
Replies: 460
Views: 115373

Re: New engine releases 2019

Francesca 0.26, you can grab from www.silentshark.co.uk. Hopefully, about +50 ELO compared to 0.25.