Search found 156 matches

by elpapa
Fri Mar 30, 2018 1:42 am
Forum: Computer Chess Club: General Topics
Topic: LCZero Elo
Replies: 34
Views: 7997

Re: LCZero Elo

Dann Corbit wrote:Against a pool of random movers
A pool of them? What possible difference could there be between one random mover and another?
by elpapa
Wed Mar 21, 2018 3:55 pm
Forum: Computer Chess Club: General Topics
Topic: Gentlemen, start your engines: A 2 ply novelty
Replies: 2
Views: 971

Re: Gentlemen, start your engines: A 2 ply novelty

[pgn][Event "2018 Spring Chess Classic A"] [White "Shankland, Samuel"] [Black "Ipatov, Alexander"] [Site "Saint Louis"] [Round "8"] [Annotator "TA"] [Result "1/2-1/2"] [Date "2018.03.13"] [WhiteElo "2668"] [BlackElo "2665"] [PlyCount "78"] 1. d4 {} Na6 (1... Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5...
by elpapa
Sun Mar 18, 2018 11:10 pm
Forum: Computer Chess Club: General Topics
Topic: Slipper next generation: an update
Replies: 2
Views: 832

Re: Slipper next generation: an update

The first 6½ moves are just in the order in which they are generated (assuming you're scanning the board A1, B1...H8, captures first).

But then there's the surprising 7...d6 and all bets are off.
by elpapa
Fri Feb 02, 2018 11:11 pm
Forum: Computer Chess Club: General Topics
Topic: Engine or Human ?
Replies: 10
Views: 2191

Re: Engine or Human ?

Ovyron wrote:I voted Human-Human, black's attack didn't seem Engine-like, but an engine as white wouldn't have allowed it.
This.

I voted human-human as well.
by elpapa
Tue Jan 16, 2018 11:49 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 8 - Initial position until depth 59
Replies: 14
Views: 5131

Re: Stockfish 8 - Initial position until depth 59

Dann Corbit wrote:After 29. Bd5+, the rest is quiescence.
That is ply 59
Nitpick: The 59th halfmove is actually 30. a4
by elpapa
Tue Dec 19, 2017 1:37 am
Forum: Computer Chess Club: General Topics
Topic: Skipper zero : no progress
Replies: 30
Views: 6837

Re: Skipper zero : no progress

Result after two hours training on this simple endgame. Bit disappointing. [pgn] [FEN "3qk3/8/8/8/8/8/8/4K3 w - - 0 1"] 1. Ke1-f1 { 0.300 0.01 } { } 1. Qd8-d3 { 0.345 0.01 } { } 2. Kf1-g1 { 0.369 0.01 } { } 2. Qd3-d2 { 0.413 0.01 } { } 3. Kg1-f1 { 0.362 0.01 } { } 3. Qd2-f2 { 0.299 0.01 } { } 4. Kf...
by elpapa
Sun Nov 12, 2017 10:55 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 128-core AMD server
Replies: 40
Views: 9576

Re: 128-core AMD server

Rebel wrote:
jdart wrote:They still have one left, if anyone is interested.
Interested yes, but I am afraid my lovely wife would divorce me.
What you need to do is make a list. Wife: pros and cons, blade server: pros and cons. If the wife wins, make sure you burn or eat the list before she finds it.
by elpapa
Thu Nov 09, 2017 4:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Move ordering
Replies: 17
Views: 4300

Re: Move ordering

The actual code for MVV/LVA I have is this: value += piecevals[GetPieceByBit(b, Bitlist{b->index[m.dest]})] - (6 - GetPieceByBit(b, Bitlist{b->index[m.from]})); The 6 - piece_type is because a King = 0 and a Pawn = 5 in my engine. I'm reasonably sure that's okay. Agr...
by elpapa
Thu Nov 09, 2017 2:44 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Move ordering
Replies: 17
Views: 4300

Re: Move ordering

I use the following formula for MVV/LVA: score += pieceval[captured_piece] * 8 - pieceval[own_piece] Or maybe * 16, I don't remember, but I think * 8 is enough using traditional piece values. Looking at your code it seems you just subtract one value from the other which must be wrong.
by elpapa
Mon Oct 30, 2017 10:39 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Aspiration window problem
Replies: 14
Views: 3525

Re: Aspiration window problem

Are you sure Bg5 is the best move?

Code: Select all

SF8 depth 39, multiPV=4:

Bxe5 -0.44
Bd8  -1.11
Bg5  -1.68
Nc5  -2.82