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Author SHA1 Message Date
Marco Costalba
5a72ff128e Benchmark: print nodes searched at the end of testing 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-24 20:43:11 +01:00
Marco Costalba
3f63dd1023 Easy debug macro enabling 
Now you don't need to toggle show_debug_xxxx anymore

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-22 15:59:26 +01:00
Marco Costalba
62ab7e4612 Introduce node limited benchmarking 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-22 11:56:14 +01:00
Marco Costalba
1867785231 Introduce depth limited benchmarking 
Also print some more info.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-22 11:02:05 +01:00
Marco Costalba
bac4da70c9 Remove an include in movepick.h 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Signed-off-by: unknown <Marco@.(none)>
 2008-11-19 22:15:41 +01:00
Marco Costalba
8189ae9e1c Fix a silly bug that disabled second killer 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Signed-off-by: unknown <Marco@.(none)>
 2008-11-19 22:15:26 +01:00
Marco Costalba
1d525bb45f qsearch: restore pruning of pv nodes with negative SEE 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Signed-off-by: unknown <Marco@.(none)>
 2008-11-19 22:15:14 +01:00
Marco Costalba
da7d872eda Fix Intel warnings and init_search_stack argument 
Should be a reference not a copy!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:46:12 +01:00
Marco Costalba
49d52b8266 Set killer slots number to 2 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:48 +01:00
Marco Costalba
75d001addd MovePicker: fix a nasty bug in EvalInfo optimization 
EvalInfo has missing attack info when a specialized
endgame function is used.

We missed this case and were using an empty attack bitboard
instead so that no captures were generated for endgames.

After testing the EvalInfo optimization gave worst results,
so after a (long) debug session this nasty bug was found.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:48 +01:00
Marco Costalba
7daaf03b39 Add and use update_killers() 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:48 +01:00
Marco Costalba
2e778445d5 Add and use move_is_killer() helper 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:48 +01:00
Marco Costalba
93bc05cf69 Convert killers to a vector 
Add infrastructure to threat killer moves as a vector,
this will allow us to easily parametrize the number of
killer moves, instead of hardcode this value to two as is now.

This patch just add the infrastructure, no functional
change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:47 +01:00
Marco Costalba
a7227ac26f qsearch: do not prune pv nodes with negative SEE 
Also small micro-optimization, take a line out of
the moves loop.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:47 +01:00
Marco Costalba
bb0da595a7 Disable per-square MVV/LVA for now 
Needs more testing.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:47 +01:00
Marco Costalba
20d7197a9b MovePicker: use EvalInfo to skip generating captures 
When we know already no captures are possible in a given
position.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:46 +01:00
Marco Costalba
f4758ced90 Position::to_fen(): fix a bug in side to move representation 
Was introduced almost two months ago in patch:
"Space inflate Position::to_fen()"

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:46 +01:00
Marco Costalba
3c05bd70eb Print the move in addition to position 
Teach Position::print() to optionally print a
given move in san notation in addition to
the ASCII representation of the board.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:46 +01:00
Marco Costalba
7000e100bd Enable per-square MVV/LVA 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:46 +01:00
Marco Costalba
2ed22e4fc8 MovePicker:find bad captures during scoring 
Instead of pospone until picking. No functional
change and probably no performance change but it is
needed for following patch.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:46 +01:00
Marco Costalba
940c53c366 MovePicker: introduce per square MVV/LVA ordering 
Just added the infrastructure, no functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:45 +01:00
Marco Costalba
4df8651c82 Fix hashfull info 
Do not count has a replacement when a TT entry is
written in an empty slot.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-16 12:37:45 +01:00
Marco Costalba
2d4e2bc62a Fix in ok_to_history(): castle move is not a capture 
It is erroneusly considered a capture because king
moves on the same square of the rook.

Use the correct function Position::move_is_capture()
instead of the open coded (and buggy) one.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:40 +01:00
Marco Costalba
d89a03cc35 Small tidyup of TranspositionTable::store() 
Hopefully without bugs this time!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:40 +01:00
Marco Costalba
34b1d0538b Fix a logic bug in TranspositionTable::store() 
Make the logic work as advertised in the function
description.

Still a fallback from TT cleanup.

This should be less serious then the one in retrieve(),
but it's still a bug.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:40 +01:00
Marco Costalba
cdf1f23bc5 Micro optimization of update_history() 
Remove an useless comparison.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:40 +01:00
Marco Costalba
e86468cc63 Use cut-off checks in qsearch as killer moves 
Killers should not be captures, but checks are not
and are produced also in qsearch.

Use this information, will be useful for move ordering.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:40 +01:00
Marco Costalba
e7bad2687a Smaller null move reduction when depth is high 
Lower probability to miss something important.

It seems to increase strenght. Idea form Cyclone.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:39 +01:00
Marco Costalba
3f610e2b13 Introduce LastIterations variable 
Is set during the last iteration.

Sometime also during the second last.

During the last iteration is set in the 95% of cases.

During the second last is set in the 40% of cases.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:39 +01:00
Marco Costalba
6cc11272e2 Restore development versioning and LSN filtering 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-10 19:19:39 +01:00
Marco Costalba
a28c17ecb6 Fix a missed initialization in get_option_value() 
Spotted and reported by Dann Corbit.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-04 20:59:11 +01:00
Marco Costalba
ec23692433 Stockfish 1.01 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-04 20:56:30 +01:00
Marco Costalba
787d358554 Fix compile under Ubuntu 64bit 
Some missing includes.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-04 20:56:30 +01:00
Marco Costalba
ff0d9dad2b Fix a serious bug in TranspositionTable::retrieve() 
Reported by Tord Romstad.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-04 20:56:30 +01:00
Marco Costalba
046fd4926f Restore development versioning 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-04 20:56:30 +01:00
Marco Costalba
c595185b3c Restore LSN filtering 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-04 20:56:18 +01:00
Marco Costalba
1a158c0cf0 Revert movepick optimizations before to release 
More testing is needed and better do not risk
just before release.

Reverted:

Disable LSN filtering as defualt for release
Use MVV/LVA in score_evasions()

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:58:10 +01:00
Marco Costalba
8097e99c69 Stockfish 1.0 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:35:32 +01:00
Marco Costalba
2fa9d25e82 Disable LSN filtering as defualt for release 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:35:02 +01:00
Marco Costalba
3e275680d5 Use MVV/LVA in score_evasions() 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:00:28 +01:00
Marco Costalba
d087b0a34a Delay SEE for scoring captures 
Do not calculate SEE on all the moves in MovePicker::score_captures()
but delay until pick_move_from_list() when only the best ones are
double checked against their see value.

If a beta cut-off occurs then we avoid calculating SEE on all
the moves, but just the picked ones.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:00:28 +01:00
Marco Costalba
55b6464d40 search: micro optimization 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:00:28 +01:00
Marco Costalba
b5232e2da3 Fix a couple of gcc warnings in position.cpp 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:00:19 +01:00
Marco Costalba
35bd334b30 Update README to Stockfish 
Remove Glaurung references.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-02 15:00:09 +01:00
Marco Costalba
6e8bd8bf2d Final touches to material.cpp 
No functional changes, altough a bit of code reshuffle.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-01 12:46:54 +01:00
Marco Costalba
899b9455d6 Material: lockless per-thread maps 
Adds a good bunch of code but should be faster
and scalable because is lockless.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-01 12:46:54 +01:00
Marco Costalba
8b57416ace Revert "MovePicker::score_captures() order with SEE when pv" 
Does not seem to increase the strenght.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-01 12:46:54 +01:00
Marco Costalba
1146fc8d09 Space inflate move.cpp 
Also a little cleanup.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-01 12:46:53 +01:00
Marco Costalba
6e5cf2f3c5 Revert "Relax time constraints" 
Does not seem to give an improvment, acutually it seems
a totally neutral change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-01 12:46:53 +01:00
Marco Costalba
e5ebd4f5d1 Partially space inflate search.cpp 
Space inflate main remaining functions in search.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-01 12:46:53 +01:00