Joona Kiiski a093f33154 Use zero null move margin when depth < 4 * OnePly ... This is because when we are below 4 * OnePly, the null move will directly jump to qsearch and if we are below beta, our opponent is above beta and will get immediate stand pat cut off. So basically this patch is just optimizing away useless evaluation calls. dbg_hit_on() runs show that this heuristic is correct >99% of cases. Transposition table probably causes some inaccurary? After 1148 games on QUAD mod-orig: 583 - 565 +5 elo Signed-off-by: Marco Costalba <mcostalba@gmail.com>		2010-02-15 19:14:41 +01:00
..
application.cpp	Rename stop_threads() to exit_threads()	2010-02-13 12:07:13 +01:00
application.h	Remove unused members in Application class	2009-07-26 16:11:20 +01:00
benchmark.cpp	Fix sending of best move during an infinite search	2010-01-10 13:18:43 +01:00
benchmark.h	Update copyright year	2009-05-07 14:54:40 +02:00
bitbase.cpp	Update copyright year	2009-05-07 14:54:40 +02:00
bitbase.h	Update copyright year	2009-05-07 14:54:40 +02:00
bitboard.cpp	Fix a little warning under gcc compiler	2009-12-30 13:25:22 +01:00
bitboard.h	Logaritmic futility margins	2009-11-23 20:59:24 +01:00
bitcount.h	Add hardware POPCNT support for gcc	2010-01-31 09:39:32 +01:00
book.cpp	Allow build on HP-UX 11.X	2010-02-12 06:49:16 +01:00
book.h	Allow build on HP-UX 11.X	2010-02-12 06:49:16 +01:00
color.h	Use string instead of std::string	2009-05-10 18:38:47 +01:00
COPYING	Initial import of Glaurung 2.1	2008-09-01 07:59:13 +02:00
depth.h	Use calculate_reduction() function to simplify code	2010-01-28 11:15:41 +01:00
direction.cpp	Space inflate and cleanup direction.cpp	2009-05-20 12:02:39 +02:00
direction.h	Update copyright year	2009-05-07 14:54:40 +02:00
endgame.cpp	Rename piece_attacks_from() in attacks_from()	2009-09-20 14:55:28 +01:00
endgame.h	Better naming and document some endgame functions	2009-08-14 08:19:55 +01:00
evaluate.cpp	Save futilityMargin for both colors	2010-02-01 20:06:56 +01:00
evaluate.h	Save futilityMargin for both colors	2010-02-01 20:06:56 +01:00
history.cpp	Convert gains to use a piece-to mapping	2010-02-03 19:33:59 +01:00
history.h	Convert gains to use a piece-to mapping	2010-02-03 19:33:59 +01:00
lock.h	Simplify locking in sp_search and sp_search_pv	2010-01-27 17:58:04 +01:00
main.cpp	Implemented perft	2009-11-01 17:05:00 +01:00
Makefile	Allow build on HP-UX 11.X	2010-02-12 06:49:16 +01:00
material.cpp	Fix duplicated scaling function	2010-02-01 19:33:02 +01:00
material.h	Move game phase computation to MaterialInfo	2009-11-14 17:57:49 +01:00
mersenne.cpp	Warnings termination fest	2008-09-24 00:32:53 +02:00
mersenne.h	Update copyright year	2009-05-07 14:54:40 +02:00
misc.cpp	Allow build on HP-UX 11.X	2010-02-12 06:49:16 +01:00
misc.h	Use string instead of std::string	2009-05-10 18:38:47 +01:00
move.cpp	Micro optimize and rename move_promotion()	2009-06-20 09:04:32 +01:00
move.h	Delay sorting of negative scored non-captures	2010-02-05 18:31:09 +01:00
movegen.cpp	Small code-style touches in movegen.cpp	2009-11-06 14:42:48 +01:00
movegen.h	Retire MovePicker::discovered_check_candidates()	2009-11-05 07:03:48 +01:00
movepick.cpp	Use gain table to order non-captures	2010-02-07 08:55:51 +01:00
movepick.h	Delay sorting of negative scored non-captures	2010-02-05 18:31:09 +01:00
pawns.cpp	Convert pawns evaluation to Score	2009-11-14 17:57:50 +01:00
pawns.h	Convert pawns evaluation to Score	2009-11-14 17:57:50 +01:00
piece.cpp	Update copyright year	2009-05-07 14:54:40 +02:00
piece.h	Retire piece_is_slider(PieceType pt)	2009-09-04 08:21:07 +01:00
position.cpp	Implement MaxGain table	2010-01-27 09:57:14 +01:00
position.h	Implement MaxGain table	2010-01-27 09:57:14 +01:00
psqtab.h	Joona tweaks of piece values	2009-07-02 06:29:14 +01:00
san.cpp	Avoid copy a Position to get a move's san notation	2010-01-25 16:22:50 +01:00
san.h	Avoid copy a Position to get a move's san notation	2010-01-25 16:22:50 +01:00
scale.h	Update copyright year	2009-05-07 14:54:40 +02:00
search.cpp	Use zero null move margin when depth < 4 * OnePly	2010-02-15 19:14:41 +01:00
search.h	Rename stop_threads() to exit_threads()	2010-02-13 12:07:13 +01:00
square.h	Update copyright year	2009-05-07 14:54:40 +02:00
thread.h	Rename flag 'stop' in 'stopRequest'	2010-02-14 16:04:53 +01:00
tt.cpp	Allow build on HP-UX 11.X	2010-02-12 06:49:16 +01:00
tt.h	Increase TT size limit to 8 GB	2010-02-01 16:53:10 +01:00
types.h	Fix correct name of int64_t type	2009-11-07 10:08:28 +01:00
uci.cpp	Standardize set_option function	2010-01-27 20:03:44 +01:00
uci.h	Update copyright year	2009-05-07 14:54:40 +02:00
ucioption.cpp	Increase TT size limit to 8 GB	2010-02-01 16:53:10 +01:00
ucioption.h	Use string instead of std::string	2009-05-10 18:38:47 +01:00
value.cpp	Update copyright year	2009-05-07 14:54:40 +02:00
value.h	Fix enum Value issue with gcc 4.4	2010-01-19 23:30:23 +01:00