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Author SHA1 Message Date
Marco Costalba
b1929960f9 Fix bug in evaluate_passed_pawns() 
If blockSq is already on rank 8, blockSq + pawn_push(Us) is on rank 9,
outside of board. It does not make sense to measure king distance to
a field outside the board.

Bug spotted by Fruity:
http://open-chess.org/viewtopic.php?f=5&t=1156&start=10

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-03 12:10:53 +01:00
Marco Costalba
8447248705 Retire "Pawn Structure" UCI option 
Almost useless for the user and now is in sync with
the material value that is already weighted.

A small speedup of 0,4% because we avoid an apply_weight()
call in a fast path.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-02 17:50:46 +01:00
Marco Costalba
a10487b074 Rename stuff in evaluate.cpp 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-02 17:50:37 +01:00
Marco Costalba
db31efb8a6 Additional tweaks in evaluate_unstoppable_pawns() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-01 12:15:40 +01:00
Marco Costalba
75acd52415 Remove redundancy in evaluate_unstoppable_pawns() 
Spotted by Fruity
http://open-chess.org/viewtopic.php?f=5&t=1156&start=20

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-01 10:31:27 +01:00
Marco Costalba
18c9b5ee86 Small reformat in evaluate_unstoppable_pawns() 
Also simplify tracing because evaluate_unstoppable_pawns()
return always zero if both colors have non pawn material.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-01 09:58:45 +01:00
Marco Costalba
33bd67e052 Update polyglot.ini 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-01 07:49:40 +01:00
Marco Costalba
4dc7ba1619 Rename check related functions 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-29 18:56:48 +01:00
Marco Costalba
92d70fb667 Small renaming in thread.cpp 
To better self document the code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-29 13:08:35 +01:00
Marco Costalba
0bf475ec55 Rename Option in UCIOPtion 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-29 13:08:27 +01:00
Marco Costalba
bb7713c8e9 Limit history range to +-2000 
Extensive test series on tweaking history limit and bonus
formula. At the end this was the best.

After 11959 games:

Mod vs Orig 2087 - 1934 - 7938 ELO +4 (+- 3.7) LOS 92%

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-28 08:00:34 +01:00
Marco Costalba
e656ddcf18 Perft counts leaf nodes not generated moves. 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-27 23:21:46 +01:00
Marco Costalba
1d0159075e Use probe() as name for looking up into an hash table 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-27 07:31:51 +01:00
Marco Costalba
321320b081 Tidy up uci.cpp and siblings 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-26 13:23:47 +01:00
Marco Costalba
ca9d40c145 Move OpeningBook and RK where are actually used 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-26 13:23:39 +01:00
Marco Costalba
03f4d1e8d6 Fix a compile error with gcc 
It seems gcc does not like an extra semicolon.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-25 22:59:56 +01:00
Marco Costalba
87f2b52ace Move MovePickerExt specializations away from headings 
This unclutters a bit the heading part of search.cpp

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-25 13:35:13 +01:00
Marco Costalba
09d01ee9dc Tidy up benchmark.cpp 
Node count is different just becuase now we don't log on
"bench.txt" file anymore so that we avoid some calls to
pretty_pv() that calls Position::do_move().

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-25 12:07:30 +01:00
Marco Costalba
05cfb00f26 Large API rename in ThreadsManager 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-25 10:30:39 +01:00
Marco Costalba
339e1b49f6 Don't allocate MAX_THREADS hash tables if not necessary 
This prevent crashing on mobile devices with limited RAM,
currently with MAX_THREADS = 32 we would need 44MB that
could be too much for a poor cellphone.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-24 19:23:07 +01:00
Marco Costalba
fecefbb99c Move pawn and material tables under Thread class 
This change allows to remove some quite a bit of code
and seems the natural thing to do.

Introduced file thread.cpp to move away from search.cpp a lot
of threads related stuff.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-24 17:07:22 +01:00
Marco Costalba
c9d7e99de6 Rename MOVES_MAX in MAX_MOVES 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-24 08:54:36 +01:00
Marco Costalba
ccd5ccbcdb Retire extensions as UCI option 
There is no real need why an user should change these values.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-24 08:52:16 +01:00
Marco Costalba
633c83f648 Document why we use per-thread pawn and material tables 
Arisen from a discussion on talkchess.

No fnctional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-24 08:18:39 +01:00
Marco Costalba
fe213d30fa Fix some comments in early stop detection 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-23 15:52:51 +01:00
Marco Costalba
8b2adcf99e Retire UseLogFile in search.cpp 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-23 15:00:44 +01:00
Marco Costalba
1d368bbbdc Introduce and use SearchLimits 
Pack a bit of global variables related to search limits in
a single struct.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-23 13:11:03 +01:00
Marco Costalba
bbfe452f85 Use move_is_special() in pawn endgame condition 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-22 12:30:51 +01:00
Marco Costalba
8bf9dc8254 Retire SearchStartTime global 
Use a static variable inside current_search_time() instead.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-22 12:30:43 +01:00
Marco Costalba
f349143a6b Reduce loops in init_threads() and exit_threads() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-22 12:30:35 +01:00
Marco Costalba
79e50a2fbf Move wake_sleeping_thread() to Thread class 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-20 12:05:07 +01:00
Marco Costalba
2c317d7b28 Correctly implementg selDepth feature 
Send to GUI the deepest search depth apart from
qsearch of the PV line.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-20 12:04:59 +01:00
Marco Costalba
fdc9f8cbd7 Move sleepLock and sleepCond under Thread 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-20 12:04:52 +01:00
Marco Costalba
2e6839c9a0 Increase risk of blunders at low skill levels 
According to Heinz's tests current setup is in fact too
strong for weak players. This seems the best according
to his tests.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-20 12:04:43 +01:00
Marco Costalba
67b0d0b1cc Use only history to score non captures 
It seems gain is practically unuseful, so remove.

After 13554 games:
Mod vs Orig 2252 - 2319 - 8983 ELO -1 (+- 3.4)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-17 22:32:12 +01:00
Marco Costalba
068561f86a Small simplification in scale_by_game_phase() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-17 10:31:26 +01:00
Marco Costalba
076b62310e Move ply to SearchStack 
Shrink search() signature for better readibility.

We get also a nice 1.3% speed increase.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-17 08:59:54 +01:00
Marco Costalba
5ba85ef441 Remove one indentation level in get_next_move() 
Small renaming and fix some comments.

No functional and no speed change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-16 12:57:06 +01:00
Marco Costalba
c13b53a514 Code style in tt.cpp 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-16 10:49:35 +01:00
Marco Costalba
a860576493 Better self-document LMR reduction() formula 
Suggested by Onno

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-16 10:49:27 +01:00
Marco Costalba
786564068b Promote OptionsMap to a class 
And add a bit of documentation too.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-16 10:49:20 +01:00
Marco Costalba
6056a43419 Fix a stale comment 
Spotted by Onno

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-16 10:21:31 +01:00
Marco Costalba
f8e767388b Remove src/COPYING file 
It is enough the one in the base directory

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-14 07:06:56 +01:00
Marco Costalba
b41b590457 Remove "divide by zero" workaround 
It is now useless because of the condition at the beginning.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-14 07:04:32 +01:00
Marco Costalba
7f367e6019 Cleanup debug counters 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-13 18:51:56 +01:00
Marco Costalba
54f1c383d3 Move move_is_legal() under Position class 
It is a more logical place than in move generation file.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-13 13:18:19 +01:00
Marco Costalba
fe8f5b3497 Some more cleanup in endgame.cpp 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-13 13:17:21 +01:00
Marco Costalba
6608a16a6a Fix some warnings and a compile error with icc 
Unfortunatly icc does not understand that weakerSide and
strongerSide belongs to the base class :-(

So we have define them in the derived class.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-12 08:05:41 +01:00
Marco Costalba
b5d5646c84 Move EndgameFunctions to endgame.cpp 
And cleanup code while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-11 21:25:24 +01:00
Marco Costalba
08c464c690 Increase MaterialTableSize 8 times 
Now that we prefetch in material hash table we
can increase its size and gain something.

Hit rate is now of 98% from 92%

Speedup of 0.8%

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-04-11 18:15:40 +01:00