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Author SHA1 Message Date
Marco Costalba
de58594b0f Use standard naming conventions in book.cpp 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-08 11:50:38 +01:00
Marco Costalba
d5f0b91c06 Reintroduce operator>>() in Book class 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-08 09:15:18 +01:00
Marco Costalba
f78488bbdb Restore development version 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-08 09:11:36 +01:00
Marco Costalba
e3b23eb818 Stockfish 2.1.1 
stockfish bench signature is: 6487630

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-08 08:46:33 +01:00
Marco Costalba
d494725400 Spell fix in evaluate.cpp 
Spotted by Eelco.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-07 10:08:53 +01:00
Marco Costalba
2535dc1340 Fix reading of book file 
Bug is subtle because appears only under MSVC 32 bits in
optimized version, hence was missed before.

Bug is due to the fact that evaluation order of terms of a
sum is undefined by the standard, so in get_int() we have:

return 256 * get_int<n-1>() + bookFile.get();

And if get() is evaluated before get_int() we have a corrupted
key.

The patch rewrites the code in a more natural and predictable way.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-07 09:51:33 +01:00
Marco Costalba
339bf9b7e1 Remove redundant assignment in search() 
It is already assigned few lines before.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-05 12:16:26 +01:00
Marco Costalba
bb86691a0d Restore development version 
No functional change.
 2011-05-05 06:35:42 +01:00
Marco Costalba
f7fee4c616 Fix a warning in debug mode 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-03 19:29:21 +01:00
Marco Costalba
315c58354e Stockfish 2.1 
stockfish bench signature is: 6487630

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-03 12:11:19 +01:00
Marco Costalba
5ef2b8c494 Reintroduce permanent PV entries in TT 
We are now ready to release so restore this
improvment before 2.1

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-03 12:11:10 +01:00
Marco Costalba
9c5a53ca45 Update Readme.txt to 32 threads and bsfq on Windows 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-05-03 12:11:02 +01:00
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