]>
git.sesse.net Git - stockfish/log
Marco Costalba [Wed, 2 Jun 2010 09:49:34 +0000 (10:49 +0100)]
Sync sp_search() with main search()
And fix qserahc() dispatch also there.
No functional change tested wit Faked Split.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 1 Jun 2010 20:28:45 +0000 (21:28 +0100)]
Retire bitScanReverse32()
Use log() instead because we are not in speed
critical paths.
Also a bit of renaming and code shuffle while there.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 1 Jun 2010 18:49:46 +0000 (19:49 +0100)]
Retire ok_to_do_nullmove()
Has been remained the same from ages also with the FIXME.
Retire for now and rearrange the conditions order for
maximum performance.
Also a small touch at null zugzwang verification.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 1 Jun 2010 14:31:24 +0000 (15:31 +0100)]
Move invariant of singular ext. check out of loop
It is almost always false.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 1 Jun 2010 14:02:14 +0000 (15:02 +0100)]
Rename ok_to_prune() in connected_threat()
It is more up to the point. Also small speedup
due to checking for threat move before calling
the function. This saves more then 90% of function calls.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 1 Jun 2010 12:03:46 +0000 (13:03 +0100)]
Avoid double function dispatch
In 44% of cases we call search() just to call
qsearch() one moment later, avoid this double dispatch.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 1 Jun 2010 07:21:11 +0000 (08:21 +0100)]
Retire init_node()
Also don't poll in qsearch()
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 1 Jun 2010 06:36:30 +0000 (07:36 +0100)]
Don't init SplitPointStack[i][j].parent
It is already set to zero because is allocated in
the global storage area.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 31 May 2010 20:38:34 +0000 (21:38 +0100)]
Use ply counter in Position object
And avoid a redundant one passed as argument in
search calls.
Also renamed gamePly in ply to better clarify this
is used as search ply and is set to zero at the
beginning of the search.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 31 May 2010 17:32:00 +0000 (18:32 +0100)]
Fix SearchStack and ply misalignment in RootMoveList
In RootMoveList c'tor we call qsearch() with
ply == 1 but SearchStack at 0.
We never noticed before because in qsearch we don't access
previous's ply SearchStack, otherwise we would have got
a nice crash ;-)
This bug is a fall down of previous patch.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 30 May 2010 07:56:38 +0000 (08:56 +0100)]
Convert SearchStack ss[] to SearchStack*
Use a pointer to current SearchStack to avoid ss[ply]
address calculation.
Gives 1% speedup on Intel compiler
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 31 May 2010 10:05:04 +0000 (12:05 +0200)]
Add function to get ply from position
It will be used by future patches.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 31 May 2010 09:47:15 +0000 (11:47 +0200)]
Move gamePly among the StateInfo data
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 31 May 2010 11:01:33 +0000 (12:01 +0100)]
Move promotion and ep under pawn handling
And remove from main do_move() flow. Just a small speedup
because we avoid two branches in the common case.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 31 May 2010 05:13:34 +0000 (06:13 +0100)]
Thread::splitPoint is a volatile pointer
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 29 May 2010 09:01:25 +0000 (10:01 +0100)]
Do IID also when we already have a ttMove
In case tte->depth() is far lower the current depth
and we are in a PV node.
Almost 45% of researches give a different ttMove !
After 999 games at 1+0
Mod vs Orig +174 =694 -131 +15 ELO !!!!!!!
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 28 May 2010 22:31:05 +0000 (23:31 +0100)]
If LMR search fails high research at intemediate depth
Do not search immediately at full depth, but try a second
chance at lower depth. This is a feature that should scale
well because become important at high depths where we have
big reductions and also big savings in avoiding a costly
full depth search.
After 942 games at 1+0
Mod vs Orig +158 =645 -139 +7 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 29 May 2010 08:43:18 +0000 (09:43 +0100)]
Fix IIDMargin description
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 29 May 2010 07:54:15 +0000 (08:54 +0100)]
Retire zobMaterial[]
Use zobrist[] array to compute material key.
Space save of 2KB in L1 cache.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 28 May 2010 11:21:03 +0000 (12:21 +0100)]
Change zobMaterial[] index 0 definition
The index at 0 was reserved for no-pieces
information. But we don't need that.
This is a prerequisite for next patch.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 29 May 2010 07:11:36 +0000 (08:11 +0100)]
Use Key type instead of Bitboard
They are both 64 bits unsigned integer, but it
is correct to use the proper type.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 23 May 2010 13:51:15 +0000 (14:51 +0100)]
Revert non-linear threats evaluation
After 999 games at 1+0
Mod vs Orig +148 =712 -139 +3 ELO
The added complexity doesn't seems to pay off and could
even scale worst with longer TC. So revert.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 22 May 2010 18:14:19 +0000 (19:14 +0100)]
Remove an useless assert in evaluate_passed_pawns()
The tested square comes from a bitboard anded with
pos.pieces_of_color(Us), so assert is useless.
Another nitpick report by Marek Kwiatkowski ;-)
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 22 May 2010 17:38:45 +0000 (18:38 +0100)]
Account for double pawn push in evaluate_unstoppable_pawns()
One of the most nitpicking patches I have ever seen.
Of course almost no functional change, but added just
becasue we are very pedantic ;-)
Spotted by Marek Kwiatkowski
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 17 May 2010 05:08:47 +0000 (06:08 +0100)]
Fix StormOpenFileBonus[] bug
It was erroneusly reversed. Bug from Glaurung times.
Probably a full re-tuning is needed anyhow.
Spotted and fixed by Ralph Stoesser.
After 999 games almost no change, but modified anyway
for documentation reasons.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 22 May 2010 11:45:05 +0000 (12:45 +0100)]
Fix a warning on array of size 0 under Windows
And better document new reality.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sat, 22 May 2010 08:34:35 +0000 (11:34 +0300)]
Drop completely illogical ei.kingDanger == 0 requirement
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sat, 22 May 2010 08:56:46 +0000 (11:56 +0300)]
Always save static value and kingDanger to TT
Around 5% speed-up
No functional change
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sat, 22 May 2010 08:51:22 +0000 (11:51 +0300)]
Drop TTClusterSize from 5 to 4
Very small obvious functional change
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 22 May 2010 10:55:01 +0000 (11:55 +0100)]
Add non-linear threats evaluation
Increase threats score according to the number of
threats and to the side to move.
Constants have been balanced after ~34k iterations.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 22 May 2010 10:35:15 +0000 (11:35 +0100)]
Revert "Simple implementation of strong YBWC"
It does not seem to increase anything even with a QUAD,
so revert.
After 1000 games with a QUAD
Mod - Orig: 500 - 497 (+1 elo)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Fri, 21 May 2010 19:17:59 +0000 (22:17 +0300)]
Add some automatic detection for Windows
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Fri, 21 May 2010 05:31:27 +0000 (08:31 +0300)]
Documentation fix
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Fri, 21 May 2010 05:05:36 +0000 (08:05 +0300)]
Correct 'prefetch' handling for Makefile
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 20 May 2010 20:37:37 +0000 (21:37 +0100)]
Let prefetch to be enabled by default on Windows
When compiling with MSVC we don't use the Makefile
so tweak a bit the Makefile to allow to let prefetch
in by default so that it works under Windows.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Thu, 20 May 2010 15:24:45 +0000 (18:24 +0300)]
Small tweaks to install gcc-profile-clean targets
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Wed, 19 May 2010 19:44:26 +0000 (22:44 +0300)]
Modify source to follow new Makefile
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Wed, 19 May 2010 17:37:56 +0000 (20:37 +0300)]
Rewrite Makefile
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 13 May 2010 08:06:27 +0000 (10:06 +0200)]
Simple implementation of strong YBWC
No gain in the worst case of 2 threads, but also no
loss and good potential for QUAD or OCTAL machines.
After 922 games at 1+0 with 2 threads
Mod vs Orig +143 =533 -143 +0 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 20 May 2010 16:48:19 +0000 (17:48 +0100)]
Remove an assert in evaluate_passed_pawns()
We already tested few lines before with:
assert(pos.pawn_is_passed(Us, s));
Spotted by Marek Kwiatkowski.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 17 May 2010 06:04:24 +0000 (07:04 +0100)]
Indentation fix in middle-game evaluation
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 15 May 2010 12:29:21 +0000 (13:29 +0100)]
Introduce init_attack_tables() in evaluate()
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 15 May 2010 12:00:32 +0000 (13:00 +0100)]
Do not consider discovered checks in king safety
Does not help and it slows downs a bit because it
is not cheap to get the possible discovered checks
out of a position.
After 997 games at 1+0
Mod vs orig +153 =692 -152 +0 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 16 May 2010 07:56:58 +0000 (08:56 +0100)]
Fix RootMove::operator<() description
Reported by Melvin Sprague.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 15 May 2010 23:56:05 +0000 (00:56 +0100)]
Remove an useless Max() in passed pawns evaluation
There is no reason for that since tr cannot become negative.
Spotted by Ralph Stoesser.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 15 May 2010 20:44:57 +0000 (21:44 +0100)]
Threath tuning results
Final values for threath tuning (after ~30k iterations)
Verified to be equivalent with tuning branch.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 14 May 2010 16:12:10 +0000 (17:12 +0100)]
Add support for gcc-profile
It's now possible to build PGO builds with GCC
Patch from Oystein Johansen
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 14 May 2010 13:11:32 +0000 (15:11 +0200)]
Rename OutpostMask[] in AttackSpanMask[]
This is a more standard naming (see chessprogramming wiki)
and is more stick to what table is and not what is used for.
Code in pawns.cpp is a bit more readable now, at least for me ;-)
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 14 May 2010 11:51:29 +0000 (12:51 +0100)]
Micro optimization in evaluate_pawns()
Avoid a double bitcount in test for candidate passed
pawn when we don't have any supporting pawn.
Also use outpost_mask() instead of build it up on
the fly.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 14 May 2010 08:42:53 +0000 (10:42 +0200)]
Introduce evaluate_pawn_storm() to unify redundant code
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 14 May 2010 07:47:11 +0000 (09:47 +0200)]
Code style tweaks to pawns.cpp
Also a small speedup.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 14 May 2010 09:53:33 +0000 (11:53 +0200)]
Change color argument of square_is_weak()
Pass the color for which the square is to be
considered weak, not the opposite.
It is more natural and intuitive in this way.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 13 May 2010 13:06:06 +0000 (15:06 +0200)]
Space inflate marsenne
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 13 May 2010 08:56:11 +0000 (10:56 +0200)]
Another split() tweak session
Function split() doesn't need to return a value, also
remove useless 'master' field.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Wed, 12 May 2010 11:46:54 +0000 (14:46 +0300)]
Document old test result
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Wed, 12 May 2010 10:29:14 +0000 (13:29 +0300)]
Remove one hack caused by misunderstanding
No functional change
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Wed, 12 May 2010 11:30:00 +0000 (12:30 +0100)]
Fix a possible out of range access in previous patch
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Wed, 12 May 2010 08:35:10 +0000 (10:35 +0200)]
Retire splitPoint->cpus field
It is redundant with splitPoint->slaves[].
Also move slaves[MAX_THREADS] among the shared data in
SplitPoint definition as it should have been already.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 11 May 2010 13:29:54 +0000 (15:29 +0200)]
Syncing sp_search() and search()
Small twekas to make the two searches as similar as
possible.
Also removed an useless setting of mateKiller in sp_search()
No functional change (tested with FakeSplit)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 11 May 2010 08:40:14 +0000 (10:40 +0200)]
Simplify init_safety()
In this for is also ready to be tuned....to be continued ;-)
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 11 May 2010 08:07:17 +0000 (10:07 +0200)]
Greatly simplify weight_option()
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 10 May 2010 10:27:33 +0000 (12:27 +0200)]
Small evaluate_passed_pawns() cleanup
Mainly renamed local variables with sensible names.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 9 May 2010 22:31:43 +0000 (23:31 +0100)]
Better integration of faked split
We don't need to comment/uncomment code, just
set FakeSplit bool to true to enable faked split.
Also reintroduced some asserts and cleaned up a bit.
Tested that with FakeSplit = true we have reproducible
finger printing even in SMP.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sun, 9 May 2010 19:04:21 +0000 (22:04 +0300)]
Disable fake-mode
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sun, 9 May 2010 18:59:39 +0000 (21:59 +0300)]
Unite sp_search() and sp_search_pv()
Also introduce a new rule:
In sp_search() always must hold: sp->alpha < sp->beta
Should fix some rear but very nasty races
To keep everything in sync, search() is also modified to
obey this rule. Because this affects only PV-nodes, should
have zero meaning to speed.
No functional change in fake mode
Regression test after 854 games
Mod vs Orig 433 - 421, no crashes.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sun, 9 May 2010 10:20:55 +0000 (13:20 +0300)]
Introduce fake-mode for split
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 9 May 2010 12:03:58 +0000 (13:03 +0100)]
Revert to old prefetch detection logic
It was broken on Windows 64bit with MSVC and possibly
on other platforms, so revert to old proven one.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 9 May 2010 09:30:50 +0000 (11:30 +0200)]
Fix an off-by-one bug in ThreatBonus[] table
We need a retuning anyhow.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sat, 8 May 2010 13:59:00 +0000 (16:59 +0300)]
Templatize qsearch
No functional change and 2% speed-up on GCC.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 7 May 2010 07:39:28 +0000 (09:39 +0200)]
Retire mate threat detection from evaluation
Remove a lot of complex, obscure and useless code.
After 999 games at 1+0
Mod vs Orig +162 =673 -164 -1 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 8 May 2010 12:30:34 +0000 (13:30 +0100)]
Add a comment and a FIXME
And fix indentation too.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 8 May 2010 12:12:46 +0000 (13:12 +0100)]
Lookup TT for eval also in PV nodes
We don't need to evaluate the position if it
is already cached in TT. We already do this
in non-PV case.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 8 May 2010 12:06:55 +0000 (13:06 +0100)]
Fix an obsoleted descrption comment
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 8 May 2010 11:58:10 +0000 (12:58 +0100)]
Unify Internal iterative deepening
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 8 May 2010 11:39:52 +0000 (12:39 +0100)]
Templetize extension() function
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 8 May 2010 11:26:34 +0000 (12:26 +0100)]
Templetize reduction() functions
No functional or speed change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 8 May 2010 10:47:00 +0000 (11:47 +0100)]
Use enum NodeType instead of opaque true/false
Increase readibility.
No functional and speed change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sat, 8 May 2010 08:54:51 +0000 (11:54 +0300)]
Unite search_pv() and search()
A lot of redundant code removed: -182 lines of code
No functional and speed change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Fri, 7 May 2010 09:36:25 +0000 (11:36 +0200)]
Rename AttackWeight[] in KingAttackWeights[]
Also simplify a bit the code removing useless
named constants.
No functional change.
Marco Costalba [Fri, 7 May 2010 09:17:26 +0000 (11:17 +0200)]
Array ThreatBonus[] is initialized at zero by compiler
We don't need to do the job.
No functional change.
Marco Costalba [Thu, 6 May 2010 18:10:04 +0000 (19:10 +0100)]
Properly indent evaluate_king()
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 6 May 2010 12:22:53 +0000 (14:22 +0200)]
Rename futilityMargin in kingDanger in EvalInfo
This is what actually is.
A standard naming convention suggests to name a variable
with someting resembling _what_ the variable is and not
_how_ the variable is used. This normally results
in easier to read code.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 6 May 2010 09:13:07 +0000 (11:13 +0200)]
Simplify some obsolete code in king safety
Now that QueenCheckBonus and friends are always > 0
we can remove a bunch of useless 'if' statements.
No functional change.
Marco Costalba [Thu, 6 May 2010 08:36:01 +0000 (10:36 +0200)]
Rename king "safety" to king "danger"
A bigger "safety" value is actually a bigger
threat for the king, so it is a bigger "danger"
With this renaming "Cowardice" and "Aggressiveness"
UCI parameters become easier to understand.
It is also easier to understand why the once "safety"
value (that is a "danger") is subtracted from evaluation
instead of being added.
No functional change.
Marco Costalba [Thu, 6 May 2010 07:58:04 +0000 (09:58 +0200)]
Evaluation weights cleanup
Use a Weights[] array instead of named variables to
store evaluation weights.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 6 May 2010 02:23:41 +0000 (03:23 +0100)]
Set Mate Threat Extension to OnePly
For both PV and non-PV nodes.
After 981 games at 1+0
Mod vs Orig +153 =686 -142 +4 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 1 May 2010 04:41:25 +0000 (05:41 +0100)]
Avoid a call to apply_weight() in evaluate_king()
Precompute scores in SafetyTable[] instead of calculate
them on the fly.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Sun, 18 Apr 2010 16:12:47 +0000 (19:12 +0300)]
Further push the LMR pedal
More aggressive LMR reductions.
Tested at different time controls:
- Tested with 1CPU 1+0, after 3000 games, result was +12 ELO
- Tested this with 4CPU 1+0 and got sth around 5-10 ELO increase
- Last one at long time control,after ~1000 games with 10+0 result is:
Orig - Mod: 491 - 520 (+10 elo)
A testing marathon by Joona for this important change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 2 May 2010 12:39:47 +0000 (13:39 +0100)]
A promotion piece cannot be a king or a pawn
Or any other garbage value bigger then QUEEN.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 2 May 2010 11:02:41 +0000 (12:02 +0100)]
Do not return from idle_loop() with lock held
Master thread returns from idle_loop() when sp->cpus == 0,
but cpus is decremented by slave threads under sp->lock,
so it could happen that we return in split(), where we release
the split point, with sp->lock still held.
This patch guarantees that sp->lock is released when returning
to split().
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 2 May 2010 08:28:37 +0000 (09:28 +0100)]
Reverse the logic used to detect prefetch
Explicitly search for x86 architecture instead of
excluding the others.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 1 May 2010 09:34:28 +0000 (10:34 +0100)]
Allow a static evaluation to overwrite an exsisting entry
The idea here is that if we cut-off after a stand pat the
already exsisting TT entry was not usable with current
beta, so overwrite anyway.
After 999 games at 1+0
Mod vs Orig +173 =665 -161 + 4 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sat, 1 May 2010 05:12:04 +0000 (06:12 +0100)]
Do not refresh TT in qsearch
Almost no change and simplifies a bit the code.
After 961 games at 1+0
Mod vs Orig +156 =650 -146 +4 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Thu, 29 Apr 2010 17:21:48 +0000 (18:21 +0100)]
Refresh TT entry after a cut-off to avoid aging
Re-save the same TT entry if value is usable and allow
us to cut-off, it means that entry is valuable and
we want to keep it fresh updating the 'generation'
parameter up to the current value.
Patch suggested by J. Wesley Cleveland and better
clarified by Miguel A. Ballicora.
After 999 games at 1+0 64MB hash size
Mod vs Orig +167 =677 -155 +4 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Joona Kiiski [Mon, 26 Apr 2010 08:51:03 +0000 (11:51 +0300)]
Fix compile error on GCC
Add missing prototype.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 27 Apr 2010 05:17:32 +0000 (06:17 +0100)]
Endgame's apply() method can be 'const'
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Tue, 27 Apr 2010 04:00:45 +0000 (05:00 +0100)]
Remove an obsolete comment
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 26 Apr 2010 12:43:03 +0000 (14:43 +0200)]
Another small material tweak
In this case we avoid to name the 'black' version of the
endgame function but use a vector indexed by color instead.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Mon, 26 Apr 2010 09:42:46 +0000 (11:42 +0200)]
Cleanup material distribution detectors
No functional change (verified each function)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Marco Costalba [Sun, 25 Apr 2010 09:31:48 +0000 (10:31 +0100)]
Do not call exit_threads() in Application d'tor
Because exit_threads() references the global object TM, we
need to call the function when still inside main(), otherwise,
due to undefined global object initialization and destruction
we could end up with referencing an already destroyed object.
Actually this should not happen because Application singleton
is initialized _only_ after all the other globals due to how
Application::initialize() is defined, but this is very tricky
C++ and not easy to follow, even for me ;-)
Also rearranged a bit main() code flow.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>