Search found 401 matches

by D Sceviour
Thu Apr 25, 2019 1:04 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Prefetch and Threading
Replies: 1
Views: 104

Prefetch and Threading

The Prefetch() instruction can be used to speed up the read operation for hash table probes. My tests indicate a speed improvement for one CPU using Prefetch(), but increasing threads decrease the effectiveness of Prefetch(). What is happening? The Prefetch() command works something like this: "Inte...
by D Sceviour
Tue Apr 02, 2019 7:38 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: CEGT - rating lists March 24th 2019
Replies: 13
Views: 1000

Re: CEGT - rating lists March 24th 2019

tpoppins wrote:
Tue Apr 02, 2019 5:44 pm
The situation was different but I suspect that underlying cause is the same -- undefined behavior possibly caused by a bug in the hashtable code.
Another possibility may be incompatible mmx or sse hardware. Try using Schooner's non-popcount generic version.
by D Sceviour
Sat Mar 30, 2019 5:12 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: CEGT - rating lists March 24th 2019
Replies: 13
Views: 1000

Re: CEGT - rating lists March 24th 2019

Werner wrote:
Sat Mar 30, 2019 9:05 am
Hi,
in a short testmatch with 100 games I have had around 50 games lost due to an illegale move:
What is the time control being used? I see 40/480:0.
by D Sceviour
Wed Mar 27, 2019 9:52 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: World KO Engine Champs 2019 Underway!
Replies: 4
Views: 296

Re: World KO Engine Champs 2019 Underway!

Why are there 35 entries for Stockfish? Can I have 35 entries for my engine?
by D Sceviour
Thu Mar 21, 2019 8:35 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Deep mate question
Replies: 12
Views: 1001

Re: Deep mate question

Dennis links are very interesting indeed. I must have something very wrong in Minic because it takes only 3 sec to find the good move, after that window is opened gradualy, but still quite fast, and only when the engine reach fully semi-opened window to search is slowing down and never finish altho...
by D Sceviour
Wed Mar 20, 2019 6:19 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Deep mate question
Replies: 12
Views: 1001

Re: Deep mate question

And only 22M nodes to validate it ! this is very small for a depth 22 opened window search no ? What do you mean by small? Every engine is different. Schooner happened to find this particular problem "easy". There must be some bug in minic on this topic ... I have already posted on this position be...
by D Sceviour
Wed Mar 20, 2019 5:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Deep mate question
Replies: 12
Views: 1001

Re: Deep mate question

xr_a_y wrote:
Wed Mar 20, 2019 4:52 pm
And only 22M nodes to validate it ! this is very small for a depth 22 opened window search no ?
What do you mean by small? Every engine is different. Schooner happened to find this particular problem "easy".
by D Sceviour
Wed Mar 20, 2019 4:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Deep mate question
Replies: 12
Views: 1001

Re: Deep mate question

Schooner v2.0.39 - 0.64 seconds to mate 24 +327.40 22.9M 0:06.39 g2g7 g8g7 g1g7 f7g7 d6e7 g7g8 e7e8 g8g7 h5h6 g7h6 e8f8 h6h5 f8f7 h5h4 f7h7 h4g3 h7g6 g3h2 e3f2 c6c5 f2f1 c5g1 g6g1 h2h3# 24 +327.32 2.2M 0:00.64 g2g7# 24 +28.05 2.2M 0:00.64 g2g7 24 +13.46 2.2M 0:00.64 g2g7 24 +7.06 2.2M 0:00.63 g2g7 2...
by D Sceviour
Sat Mar 16, 2019 7:08 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney March
Replies: 13
Views: 807

Re: On-line engine blitz tourney March

You have to love it :) [Round "-"] [White "Schooner"] [Black "LeelaRB"] [Result "1-0"] [WhiteElo "1873"] [BlackElo "2115"] [TimeControl "300+1"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3 b5 8. Qd2 Nbd7 9. g4 b4 10. Nce2 h6 11. O-O-O Qc7 12. h4 d5 13. Bf4 Qa5 14. Kb1 dxe4 15...
by D Sceviour
Sat Mar 09, 2019 12:31 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: 73rd Amateur Series Division 2
Replies: 12
Views: 900

Re: 73rd Amateur Series Division 2

This is Schooners best tournament win so far. For years I have admired Texel, Arasan and Nemorino, and watched them defeat Schooner on the ICS. I have spent hours studying their games. Now I am in awe watching Schooner surpass them. The down side is that Schooner can now have the stuffings knocked o...