BBC-1.1 Quick Run

[brianprichardson]

BBC-1.1 Quick Run

[maksimKorzh]

Thanks, I still can't understand what kind of illegal moves in PV you're talking about, can you give me some logs please?
I tried to work with cutechess-cli but it annoys me so much that I can't do anything to myself to start using in.
I just want to get a clear understanding on what does cutechess mean by saying illegal move because that doesn't seem for me to be possible.
PLEASE gimme some logs with particular PV so I can prove that the move is illegal

[brianprichardson]

D:\Cutechess-cli>cutechess-cli -debug -each tc=0:10+1.0 restart=on -engine conf=BBC-10 -engine conf=BBC-11 -games 12000 -wait 1000 -ratinginterval 10 -tb E:/syzygy;E:/syzygy-7 -tbpieces 7 -openings file=D:/Cutechess-cli/book_3moves_cp25-49_13580pos.pgn start=1 -repeat -concurrency 1 -pgnout book_3moves_cp25-49_13580pos.pgn-BBC-10_v_BBC-11.pgn min fi > log.txt
Warning: Illegal PV move h8h7 from BBC-11 (1)
Warning: PV: Kh7 Qxe6 Nf2+ Kg2 Nd3+ Kh3 h8h7
Warning: Illegal PV move f3g2 from BBC-11 (1)
Warning: PV: Nf2+ Kg2 Nd3+ Kh3 Ne5 Qxe5 Bxe5 Re7 Qd3 f3g2
Warning: Illegal PV move e6g4 from BBC-10 (0)
Warning: PV: Kg2 Ng4+ Kh3 Nf2+ e6g4
Warning: Illegal PV move e6g4 from BBC-10 (0)
Warning: PV: Kg2 Ng4+ Kh3 Nf2+ e6g4
Warning: Illegal PV move e6f5 from BBC-11 (1)
Warning: PV: Ng4+ Kh3 Nf2+ e6f5
Warning: Illegal PV move e6f6 from BBC-10 (0)
Warning: PV: Kh3 Nf2+ e6f6
Warning: Illegal PV move e6g4 from BBC-10 (0)
Warning: PV: Kh3 Nf2+ e6g4
Warning: Illegal PV move h3g4 from BBC-10 (0)
Warning: PV: Kh3 Nf2+ h3g4
Warning: Illegal PV move e6g4 from BBC-11 (1)
Warning: PV: Nf2+ e6g4
Warning: Illegal PV move b2c3 from BBC-11 (1)
Warning: PV: Nf2+ b2c3
Warning: Illegal PV move e6g4 from BBC-11 (1)
Warning: PV: Nf2+ e6g4
Warning: Omitted incomplete game 1

D:\Cutechess-cli>

log.txt

[maksimKorzh]

Now this is what need, thank you!

[maksimKorzh]

@brianprichardson it seems like I've fixed illegal move in PV bug.
Here's the fixed version:
[(https://github.com/maksimKorzh/bbc/blob/master/src/bbc_1.2a.c)]
Also I've optimized interpolation so now it's done only ones as suggested by Pedro Castro, so should be around 10-15 ELO stronger compared to bbc 1.1

I was testing in cutechess-cli (damn, that was a challenge!) and didn't get any warnings. Could you please test it on your side if still interested?

What the problem was (IMO):
I was updating PV length after returning 3 fold repetition draw score so the illegal move was attached to the PV becuase PV length wasn't adjusted correctly, now when I set up PV length before 3 fold repetition (where it should be) everything seems working ok.

[brianprichardson]

No more invalid PV move warning, but 1.2a has losses on time now.
Will run match again this time with logging.

[brianprichardson]

search for 'on time' to see time losses
cutechess.log

[maksimKorzh]

Hmmm... very strange because I didn't change timing at all, now assuming time left for both sides:
go wtime 1029 btime 1036 winc 1000 binc 1000
what's wrong in loosing on time?

[maksimKorzh]

@brianprichardson
Here's report by Pedro Castro (bbc_1.2a vs bbc_1.1):
bbc1.2a only interpolación Win 73 games, Lost 58, Draw 69.
Elo for bbc1.2a is: +26.1
But error here is: +/- 39.1

Timings in both engines are 100% the same.
I just can't get why engine can't lose on time??
Is that a bug??

[brianprichardson]

Losing on time is not acceptable, especially with a 1 second increment.
It distorts match results.
Suppose your engine is in a strong winning position and then gets flagged for a time loss.

[maksimKorzh]

@brianprichardson it seems I've fixed lose on increment bug, please see this version:
https://github.com/maksimKorzh/bbc/blob/master/src/bbc_1.2b.c
Also it finally brought commented out evaluation features, so version 1.2b should be stronger compared to 1.2a

[brianprichardson]

No more time losses with 1.2b version at 10 sec + 1 sec increment.

[maksimKorzh]

@brianprichardson thanks, Brian