Fabian Fichter [Tue, 2 Apr 2019 19:00:14 +0000]
Rewrite definition of piece types
No functional change.
Fabian Fichter [Tue, 9 Apr 2019 20:34:02 +0000]
Increase stack size to 4 MB
Fabian Fichter [Tue, 9 Apr 2019 19:54:07 +0000]
Merge official-stockfish/master
bench: 3014293
31m059 [Tue, 9 Apr 2019 17:35:17 +0000]
Raise kingDanger threshold and adjust constant term #2087
The kingDanger term is intended to give a penalty which increases rapidly in the middlegame but less so in the endgame. To this end, the middlegame component is quadratic, and the endgame component is linear. However, this produces unintended consequences for relatively small values of kingDanger: the endgame penalty will exceed the middlegame penalty. This remains true up to kingDanger = 256 (a S(16, 16) penalty), so some of these inaccurate penalties are actually rather large.
In this patch, we increase the threshold for applying the kingDanger penalty to eliminate some of this unintended behavior. This was very nearly, but not quite, sufficient to pass on its own. The patch was finally successful by integrating a second kingDanger tweak by @Vizvezdenec, increasing the kingDanger constant term slightly and improving both STC and LTC performance.
Where do we go from here? I propose that in the future, any attempts to tune kingDanger coefficients should also consider tuning the kingDanger threshold. The evidence shows clearly that it should not be automatically taken to be zero.
Special thanks to @Vizvezdenec for the kingDanger constant tweak. Thanks also to all the approvers and CPU donors who made this possible!
STC:
LLR: -2.96 (-2.94,2.94) [0.00,4.00]
Total: 141225 W: 31239 L: 30846 D: 79140
http://tests.stockfishchess.org/tests/view/
5cabbdb20ebc5925cf00b86c
LTC:
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 30708 W: 5296 L: 5043 D: 20369
http://tests.stockfishchess.org/tests/view/
5cabff760ebc5925cf00c22d
Bench: 3445945
protonspring [Fri, 5 Apr 2019 03:45:52 +0000]
Remove BetweenBB Array #2076
Non functional change.
Fabian Fichter [Sat, 6 Apr 2019 17:55:49 +0000]
Include variant bench in CI
No functional change.
Fabian Fichter [Sat, 6 Apr 2019 15:56:11 +0000]
Add missing bitboard operator
Fix issues with shogi variants due to upstream merge.
Fabian Fichter [Sat, 6 Apr 2019 13:05:36 +0000]
Merge official-stockfish/master
bench: 3258421
Marco Costalba [Sat, 6 Apr 2019 10:43:41 +0000]
Fix sed for OS X (#2080)
The sed command is a bit different in Mac OS X (why not!).
The ‘-i’ option required a parameter to tell what extension to add for the
backup file. To fix it, just add extension for backup file, for example ‘.bak’
Fix broken Trevis CI test
No functional change.
erbsenzaehler [Sun, 27 Jan 2019 08:20:38 +0000]
Make ONE_PLY value independent again
And a Trevis CI test to catch future issues.
No functional change.
Marco Costalba [Sat, 6 Apr 2019 00:03:15 +0000]
Fix a missing assignment in previous commit
While reformatting the patch, I got wrong a statement and converted it badly.
xoto10 [Wed, 3 Apr 2019 07:35:55 +0000]
Use average bestMoveChanges across all threads #2072
The current update only by main thread depends on the luck of
whether main thread sees any/many changes to the best move or not.
It then makes large, lumpy changes to the time to be
used (1x, 2x, 3x, etc) depending on that sample of 1.
Use the average across all threads to get a more reliable
number with a smoother distribution.
STC @ 5+0.05 th 4 :
LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 51899 W: 11446 L: 11029 D: 29424
http://tests.stockfishchess.org/tests/view/
5ca32ff20ebc5925cf0016fb
STC @ 5+0.05 th 8 :
LLR: 2.96 (-2.94,2.94) [0.50,4.50]
Total: 13851 W: 2843 L: 2620 D: 8388
http://tests.stockfishchess.org/tests/view/
5ca35ae00ebc5925cf001adb
LTC @ 20+0.2 th 8 :
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 48527 W: 7941 L: 7635 D: 32951
http://tests.stockfishchess.org/tests/view/
5ca37cb70ebc5925cf001cec
Further work:
Similar changes might be possible for the fallingEval and timeReduction calculations (and elsewhere?), using either the min, average or max values across all threads.
Bench 3506898
Moez Jellouli [Fri, 29 Mar 2019 13:05:02 +0000]
Remove pureStaticEval #2069
Remove pureStaticEval variable and keep only one
static evaluation (ss->staticEval).
STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 64617 W: 14348 L: 14312 D: 35957 Elo -0.24
http://tests.stockfishchess.org/tests/view/
5c9e1ad70ebc5925cfffc106
LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 82200 W: 13703 L: 13680 D: 54817 Elo -0.24
http://tests.stockfishchess.org/tests/view/
5c9e4efd0ebc5925cfffc68b
Bench : 3506898
Moez Jellouli [Thu, 4 Apr 2019 06:49:35 +0000]
Add attacked by 2 pawns to attackedBy2 (#2074)
Add squares attacked by 2 pawns to the attackedBy2 array
STC :
LLR: -2.95 (-2.94,2.94) [0.50,4.50]
Total: 132722 W: 29583 L: 29090 D: 74049
http://tests.stockfishchess.org/tests/view/
5ca231ba0ebc5925cf000794
LTC :
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 94589 W: 16161 L: 15718 D: 62710
http://tests.stockfishchess.org/tests/view/
5ca25d180ebc5925cf000ba4
Bench: 3337864
Fabian Fichter [Sun, 31 Mar 2019 17:32:29 +0000]
Merge official-stockfish/master
bench: 3273755
Fabian Fichter [Sun, 31 Mar 2019 11:11:19 +0000]
Merge official-stockfish/master
No functional change.
Marco Costalba [Sun, 31 Mar 2019 09:47:36 +0000]
Assorted trivial cleanups 3/2019 (#2030)
No functional change.
protonspring [Mon, 25 Mar 2019 19:04:14 +0000]
Use simple array for Pawns Connected bonus #2061
Simplification which removes the pawns connected array.
Instead of storing the values in an array, the values are
calculated real-time. This is about 1.6% faster on my machines.
Performance:
master ave nps: 159,248,672
patch ave nps: 161,905,592
STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 20363 W: 4579 L: 4455 D: 11329
http://tests.stockfishchess.org/tests/view/
5c9925ba0ebc5925cfff79a6
Non functional change.
Moez Jellouli [Sun, 31 Mar 2019 08:51:08 +0000]
Shuffle detection #2064
Shuffle detection procedure :
Shuffling positions are detected if
the last 36 moves are reversible (rule50_count() > 36),
the position have been already in the TT,
there is a still a pawn on the board (to avoid special endings like KBN vs K).
The position is then judged as a draw.
An extension is realized if we already made 14 successive reversible moves in PV to accelerate the detection of the eventual draw.
To go further : we can still improve the idea. The length of the tests need a lot of ressources.
the limit of 36 is logic but must be checked again for special zugzwang positions,
this limit can be decreased in special positions,
the limit of 14 moves for extension has not been tuned.
STC
LLR: -2.94 (-2.94,2.94) [0.50,4.50]
Total: 32595 W: 7273 L: 7275 D: 18047 Elo +0.43
http://tests.stockfishchess.org/tests/view/
5c90aa330ebc5925cfff1768
LTC
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 51249 W: 8807 L: 8486 D: 33956 Elo +1.85
http://tests.stockfishchess.org/tests/view/
5c90b2450ebc5925cfff1800
VLTC
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 137974 W: 20503 L: 19983 D: 97488 Elo +1.05
http://tests.stockfishchess.org/tests/view/
5c9243a90ebc5925cfff2a93
Bench: 3548313
protonspring [Sun, 31 Mar 2019 08:48:27 +0000]
Replace std::mins/max with clamp function (#2062)
Adding a clamp function makes some of these range limitations a bit prettier and removes some #include's.
STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 28117 W: 6300 L: 6191 D: 15626
http://tests.stockfishchess.org/tests/view/
5c9aa1df0ebc5925cfff8fcc
Non functional change.
Joost VandeVondele [Sun, 31 Mar 2019 08:44:55 +0000]
Remove duplication. (#2068)
always use the implementation of gives_check in position, no need to
hand-inline part of the implementation in search.
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 57895 W: 12632 L: 12582 D: 32681
http://tests.stockfishchess.org/tests/view/
5c9eaa4b0ebc5925cfffc9e3
No functional change.
protonspring [Sun, 31 Mar 2019 08:43:20 +0000]
Accessor for SquareBB #2067
This is a non-functional code style change.
If we add an accessor function for SquareBB we can consolidate all of the asserts. This is also a bit cleaner because all SquareBB accesses go through this method making future changes easier to manage.
STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 63406 W: 14084 L: 14045 D: 35277
http://tests.stockfishchess.org/tests/view/
5c9ea6100ebc5925cfffc9af
No functional change.
Fabian Fichter [Sat, 30 Mar 2019 16:47:04 +0000]
Increase stack size for MSVC (fixes #8)
Default stack size of 1 MB is insufficient for debug builds,
so increase it to 2 MB (same value as for OS X).
Fabian Fichter [Sat, 30 Mar 2019 15:12:56 +0000]
Merge official-stockfish/master
bench: 3356469
Fabian Fichter [Sat, 30 Mar 2019 15:10:23 +0000]
Merge official-stockfish/master
No functional change.
Fabian Fichter [Sat, 30 Mar 2019 13:51:07 +0000]
Merge official-stockfish/master
bench: 3539234
Fabian Fichter [Sat, 30 Mar 2019 13:32:34 +0000]
Merge official-stockfish/master
No functional change.
Fabian Fichter [Sat, 30 Mar 2019 12:46:12 +0000]
Tweak quadratic bonus for antichess
giveaway STC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 3128 W: 1311 L: 1182 D: 635
http://35.161.250.236:6543/tests/view/
5c9d2d226e23db76ed25265a
giveaway LTC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 2882 W: 1168 L: 1045 D: 669
http://35.161.250.236:6543/tests/view/
5c9dd5136e23db76ed25265f
protonspring [Sun, 24 Mar 2019 16:41:25 +0000]
Simplify pawn asymmetry (remove use of semiopen files). (#2054)
This is a functional simplification.
To me, the exclusive OR of semiopenFiles here is quite convoluted. Looks like it can be removed.
STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 43885 W: 9731 L: 9653 D: 24501
http://tests.stockfishchess.org/tests/view/
5c9041680ebc5925cfff10ea
LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 68437 W: 11577 L: 11533 D: 45327
http://tests.stockfishchess.org/tests/view/
5c9101740ebc5925cfff1cbf
bench 3575627
Joost VandeVondele [Sun, 24 Mar 2019 16:40:29 +0000]
Remove unneeded condition. (#2057)
This is covered by the line just before. If we would like to protect
against the piece value of e.g. a N == B, this could be done by an
assert, no need to do this at runtime.
No functional change.
protonspring [Sun, 24 Mar 2019 16:37:38 +0000]
Simplify Passed Pawns (#2058)
This is a non-functional simplification/speedup.
The truth-table for popcount(support) >= popcount(lever) - 1 is:
------------------lever
------------------0-------1---------2
support--0------X-------X---------0
-----------1------X-------X---------X
-----------2------X-------X---------X
Thus, it is functionally equivalent to just do: support || !more_than_one(lever) which removes the expensive popcounts and the -1.
Result of 20 runs:
base (...h_master.exe) = 1451680 +/- 8202
test (./stockfish ) = 1454781 +/- 8604
diff = +3101 +/- 931
STC
LLR: 2.94 (-2.94,2.94) [-3.00,1.00]
Total: 35424 W: 7768 L: 7674 D: 19982
Http://tests.stockfishchess.org/tests/view/
5c970f170ebc5925cfff5e28
No functional change.
Fabian Fichter [Sat, 23 Mar 2019 15:48:59 +0000]
Avoid timeouts in travis builds
Fabian Fichter [Sat, 23 Mar 2019 15:18:41 +0000]
Include large-board version in CI
Fabian Fichter [Sat, 23 Mar 2019 15:02:38 +0000]
Fix upstream merge for large-board version
Fabian Fichter [Fri, 22 Mar 2019 20:35:36 +0000]
Merge official-stockfish/master
bench: 3456069
Fabian Fichter [Fri, 22 Mar 2019 20:05:35 +0000]
Merge official-stockfish/master
bench: 3933394
Fabian Fichter [Fri, 22 Mar 2019 19:48:52 +0000]
Merge official-stockfish/master
bench: 3653948
Fabian Fichter [Fri, 22 Mar 2019 18:23:43 +0000]
Tweak nCheck bonus
3check STC
LLR: -2.97 (-2.94,2.94) [0.00,10.00]
Total: 14209 W: 6657 L: 6550 D: 1002
http://35.161.250.236:6543/tests/view/
5c8956106e23db76ed2525e2
3check LTC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 5693 W: 2683 L: 2507 D: 503
http://35.161.250.236:6543/tests/view/
5c92acec6e23db76ed252639
xoto10 [Sun, 10 Mar 2019 21:57:48 +0000]
Remove !extension check #2045
While looking at pruning using see_ge() (which is very valuable)
it became apparent that the !extension test is not adding any
value - simplify it away.
STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 56843 W: 12621 L: 12569 D: 31653
http://tests.stockfishchess.org/tests/view/
5c8588cb0ebc5925cffe77f4
LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 78622 W: 13223 L: 13195 D: 52204
http://tests.stockfishchess.org/tests/view/
5c8611cc0ebc5925cffe7f86
Further work could be to optimize the remaining see_ge() test. The idea of less pruning at higher depths is valuable, but perhaps the test (-PawnValueEg * depth) can be improved.
Bench: 3188688
CoffeeOne [Wed, 20 Mar 2019 13:50:41 +0000]
Skip skipping thread scheme (#1972)
Several simplification tests (all with the bounds [-3,1]) were run:
5+0.05 8 threads, failed very quickly:
http://tests.stockfishchess.org/tests/view/
5c439a020ebc5902bb5d3970
20+0.2 8 threads, also failed, but needed a lot more games:
http://tests.stockfishchess.org/tests/view/
5c44b1b70ebc5902bb5d4e34
60+0.6 8 threads passed:
http://tests.stockfishchess.org/tests/view/
5c48bfe40ebc5902bca15325
60+0.6 4 threads passed:
http://tests.stockfishchess.org/tests/view/
5c4b71a00ebc593af5d49904
No functional change.
Fabian Fichter [Fri, 15 Mar 2019 13:55:05 +0000]
Re-enable appveyor debug builds
No functional change.
Fabian Fichter [Fri, 15 Mar 2019 13:07:56 +0000]
Tweak extinction bonus
kinglet STC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 854 W: 438 L: 332 D: 84
http://35.161.250.236:6543/tests/view/
5c89565a6e23db76ed2525eb
kinglet LTC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 707 W: 360 L: 259 D: 88
http://35.161.250.236:6543/tests/view/
5c8a07376e23db76ed2525f0
extinction STC
LLR: 2.98 (-2.94,2.94) [-10.00,5.00]
Total: 5185 W: 2409 L: 2382 D: 394
http://35.161.250.236:6543/tests/view/
5c89566e6e23db76ed2525ee
Fabian Fichter [Fri, 15 Mar 2019 10:39:42 +0000]
Merge official-stockfish/master
bench: 3633478
Fabian Fichter [Fri, 15 Mar 2019 10:23:51 +0000]
Merge official-stockfish/master
bench: 3423031
Fabian Fichter [Thu, 14 Mar 2019 20:26:01 +0000]
Reenable unoptimized builds for OSX
Marco Costalba [Tue, 12 Mar 2019 07:35:10 +0000]
Increase thread stack for OS X (#2035)
On OS X threads other than the main thread are created with a reduced stack
size of 512KB by default, this is dangerously low for deep searches, so
adjust it to TH_STACK_SIZE. The implementation calls pthread_create() with
proper stack size parameter.
Verified for no regression at STC enabling the patch on all platforms where
pthread is supported.
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 50873 W: 9768 L: 9700 D: 31405
No functional change.
Fabian Fichter [Thu, 14 Mar 2019 21:05:47 +0000]
Merge official-stockfish/master
Fabian Fichter [Thu, 14 Mar 2019 18:55:42 +0000]
Adjust instrumented testing
Fix timeouts and skip thread-sanitizing for now to fix CI.
No functional change.
Marco Costalba [Tue, 12 Mar 2019 07:35:10 +0000]
Increase thread stack for OS X (#2035)
On OS X threads other than the main thread are created with a reduced stack
size of 512KB by default, this is dangerously low for deep searches, so
adjust it to TH_STACK_SIZE. The implementation calls pthread_create() with
proper stack size parameter.
Verified for no regression at STC enabling the patch on all platforms where
pthread is supported.
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 50873 W: 9768 L: 9700 D: 31405
No functional change.
Fabian Fichter [Sun, 10 Mar 2019 15:25:37 +0000]
Bonus for extinction piece types
kinglet STC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 117 W: 104 L: 9 D: 4
http://35.161.250.236:6543/tests/view/
5c84ed3d6e23db76ed2525af
giveaway STC
LLR: 2.94 (-2.94,2.94) [-10.00,5.00]
Total: 2220 W: 948 L: 905 D: 367
http://35.161.250.236:6543/tests/view/
5c85020e6e23db76ed2525b2
extinction STC (failed)
LLR: -2.98 (-2.94,2.94) [-10.00,5.00]
Total: 939 W: 400 L: 471 D: 68
http://35.161.250.236:6543/tests/view/
5c84ece66e23db76ed2525a8
Fabian Fichter [Sat, 9 Mar 2019 10:19:53 +0000]
Fix tablebase probing
Do not rely on assumption that PIECE_TYPE_NB = 8.
Fabian Fichter [Sat, 9 Mar 2019 22:29:05 +0000]
Fix FEN of nCheck variants
3check
LLR: 2.96 (-2.94,2.94) [-10.00,5.00]
Total: 515 W: 268 L: 208 D: 39
http://35.161.250.236:6543/tests/view/
5c843ee36e23db76ed252591
3check 2threads
LLR: 2.95 (-2.94,2.94) [-10.00,5.00]
Total: 527 W: 270 L: 211 D: 46
http://35.161.250.236:6543/tests/view/
5c84440f6e23db76ed252594
protonspring [Sun, 10 Mar 2019 09:53:39 +0000]
Remove popcount16() (#2038)
This is a non-functional simplification / code-style change.
This popcount16 method does nothing but initialize the PopCnt16 arrays.
This can be done in a single bitset line, which is less lines and more clear. Performance for this code is moot.
No functional change.
xoto10 [Fri, 1 Feb 2019 20:02:03 +0000]
Simplify failedLow away #1986
FailedLow doesn't seem to add any value so remove it.
STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 43915 W: 9682 L: 9604 D: 24629
http://tests.stockfishchess.org/tests/view/
5c5339770ebc592fc7baef74
LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 58515 W: 9670 L: 9609 D: 39236
http://tests.stockfishchess.org/tests/view/
5c53cc840ebc592fc7baf6c1
Ideas for further work:
Tune the values in the revised fallingEval calculation
Consider adding a term using delta, e.g. c * (delta - 20) as an indicator of eval instability
Bench: 3318033
Marco Costalba [Sat, 9 Mar 2019 12:24:26 +0000]
Revert "Allowing singular extension in mate positions"
It was causing an assert: value > -VALUE_INFINITE
under some conditions.
See https://github.com/official-stockfish/Stockfish/issues/2036
Bench: 3318033
Fabian Fichter [Fri, 8 Mar 2019 21:43:44 +0000]
Merge official-stockfish/master
bench: 3428840
Fabian Fichter [Wed, 6 Mar 2019 20:47:20 +0000]
Tweak shatranj piece values
shatranj STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 980 W: 170 L: 104 D: 706
http://35.161.250.236:6543/tests/view/
5c7ec32b6e23db07348e8774
shatranj LTC
LLR: 2.98 (-2.94,2.94) [0.00,10.00]
Total: 918 W: 134 L: 71 D: 713
http://35.161.250.236:6543/tests/view/
5c7ed6e76e23db07348e8777
protonspring [Tue, 5 Mar 2019 19:48:29 +0000]
Remove FutilityMoveCounts array. (#2024)
This is a functional simplification that removes the FutilityMoveCounts array with a simple equation using only ints.
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 14175 W: 3123 L: 2987 D: 8065
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 9900 W: 1735 L: 1597 D: 6568
Bench: 3380343
protonspring [Sun, 3 Mar 2019 14:53:36 +0000]
Shrink Reductions[] array to one dimension
This is a non-functional patch which shrinks the reductions array.
This saves about 8Kb of memory.
The only slow part of master's reductions array is the calculation
of the log values, so using a separate array for those values and
calculating the rest real-time appears to be just as fast as master.
STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 63245 W: 13906 L: 13866 D: 35473
http://tests.stockfishchess.org/tests/view/
5c7b571f0ebc5925cffdc104
No funcional change.
SFisGOD [Tue, 5 Mar 2019 04:34:02 +0000]
Pawn value tweak
STC:
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 47166 W: 10664 L: 10311 D: 26191
http://tests.stockfishchess.org/tests/view/
5c7dfc370ebc5925cffdf830
LTC:
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 35439 W: 6034 L: 5767 D: 23638
http://tests.stockfishchess.org/tests/view/
5c7e41020ebc5925cffdfe9b
Bench: 3470519
Marco Costalba [Fri, 8 Feb 2019 09:36:03 +0000]
Assorted trivial cleanups 2/2019
No functional change.
Vizvezdenec [Wed, 27 Feb 2019 20:25:12 +0000]
Add continuation history 5
Original patch passed STC:
http://tests.stockfishchess.org/tests/view/
5c7439ff0ebc5925cffd3e64
LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 26348 W: 5926 L: 5632 D: 14790
and LTC:
http://tests.stockfishchess.org/tests/view/
5c745a8b0ebc5925cffd41a8
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 198411 W: 33238 L: 32510 D: 132663
But had undefined behavior.
After fixing (thx to @vondele )
passed LTC:
http://tests.stockfishchess.org/tests/view/
5c763c7c0ebc5925cffd5de2
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 112253 W: 18711 L: 18225 D: 75317
bench 3049229
Fabian Fichter [Mon, 4 Mar 2019 19:22:44 +0000]
Implement sittuyin stalemate rule (#14)
Taking a promotion to avoid stalemate is optional (rule 3.9 c.7).
Example:
setoption name multipv value 20
setoption name UCI_Variant value sittuyin
position fen k5PK/3r4/8/8/8/8/8/8 b - - 0 1
go depth 1
No functional change for other variants.
Fabian Fichter [Mon, 4 Mar 2019 19:54:56 +0000]
Fix detection of optional game end
No functional change for variants without counting rules.
Fabian Fichter [Sat, 2 Mar 2019 21:02:14 +0000]
Tweak shogi piece values
shogi
LLR: 2.98 (-2.94,2.94) [0.00,10.00]
Total: 918 W: 504 L: 390 D: 24
Fabian Fichter [Sat, 2 Mar 2019 13:49:49 +0000]
Merge official-stockfish/master
bench: 3253645
Fabian Fichter [Sat, 2 Mar 2019 10:07:32 +0000]
Merge official-stockfish/master
bench: 3334755
Fabian Fichter [Fri, 1 Mar 2019 22:59:03 +0000]
Extend endgame evaluation for fairy pieces
Fabian Fichter [Fri, 1 Mar 2019 18:39:49 +0000]
Generalize passed pawn evaluation
losalamos
LLR: 2.99 (-2.94,2.94) [-10.00,5.00]
Total: 140 W: 56 L: 13 D: 71
ai-wok
LLR: 3.04 (-2.94,2.94) [-10.00,5.00]
Total: 194 W: 112 L: 53 D: 29
Joost VandeVondele [Wed, 27 Feb 2019 12:36:48 +0000]
Remove skipQuiets with mate fix. (#2021)
This removes the skipQuiets variable, as was done in an earlier round by
@protonspring, but fixes an oversight which led to wrong mate
announcements. Quiets can only be pruned when there is no mate score, so
set moveCountPruning at the right spot.
tested as a fix at STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 66321 W: 14690 L: 14657 D: 36974
http://tests.stockfishchess.org/tests/view/
5c74f3170ebc5925cffd4b3c
and as the full patch at LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 25903 W: 4341 L: 4228 D: 17334
http://tests.stockfishchess.org/tests/view/
5c7540030ebc5925cffd506f
Bench: 3292342
Marco Costalba [Tue, 26 Feb 2019 12:20:48 +0000]
Revert "Remove skipQuiets variable in search()"
This reverts commit
76d2f5b94a0df20d84ccf922bd1c0fcf1c779090.
Due to a bug, see https://github.com/official-stockfish/Stockfish/issues/2019
Bench: 3516616
Fabian Fichter [Sat, 23 Feb 2019 13:50:16 +0000]
Merge official-stockfish/master
bench: 4439882
Fabian Fichter [Sat, 23 Feb 2019 09:32:43 +0000]
Fix PSQT color symmetry for non-standard board sizes
minishogi
LLR: 2.99 (-2.94,2.94) [-10.00,5.00]
Total: 584 W: 324 L: 259 D: 1
shogi
LLR: 2.96 (-2.94,2.94) [-10.00,5.00]
Total: 680 W: 363 L: 301 D: 16
Fabian Fichter [Sat, 23 Feb 2019 09:31:40 +0000]
Update readme
Fabian Fichter [Fri, 22 Feb 2019 20:05:59 +0000]
Tweak NMP depth for racing kings
racingkings STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 2269 W: 812 L: 706 D: 751
http://35.161.250.236:6543/tests/view/
5c6daf426e23db07348e86e3
racingkings LTC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 3534 W: 1201 L: 1081 D: 1252
http://35.161.250.236:6543/tests/view/
5c6dce286e23db07348e86ec
Kurtbusch [Fri, 4 Jan 2019 23:27:14 +0000]
Add KNNvKP Endgame Heuristic
This is a somewhat different patch. It fixes blindspots for
two knights vs pawn endgame.
With local testing starting from random KNNvKP positions where the
pawn has not advanced beyond the 4th rank (thanks @protonspring !)
at 15+0.15 (4 cores), this went +105=868-27 against master. All except
two losses were won in reverse.
The heuristic is simple but effective - the strategy in these endgames
is to push the opposing king to the corner, then move the knight that's
blocking the pawn in for the checkmate while the pawn is free to move
and prevents stalemate. This patch gives SF the little boost it needs
to search the relevant king-cornering mating lines.
See the discussion in pull request 1939 for some more good results for
this test in independant tests:
https://github.com/official-stockfish/Stockfish/pull/1939
Bench: 3310239
MJZ1977 [Tue, 19 Feb 2019 16:48:03 +0000]
ProbCutCount limit dependancy to cutNode
Use the ProbCutCount limit `2 + 2 * cutNode` instead of constant 3.
STC
LLR: -2.95 (-2.94,2.94) [0.50,4.50]
Total: 61812 W: 13599 L: 13459 D: 34754
http://tests.stockfishchess.org/tests/view/
5c6d19240ebc5925cffca07a
LTC
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 27549 W: 4614 L: 4363 D: 18572
http://tests.stockfishchess.org/tests/view/
5c6d45c10ebc5925cffca7a6
Closes https://github.com/official-stockfish/Stockfish/pull/2015
Bench: 3368889
protonspring [Wed, 13 Feb 2019 21:58:43 +0000]
Remove PvNode dimension from Reductions array
This is a functional simplification: if we simply subtract one to Reductions[]
when PvNode is set, we can remove this dimension of the multidimensional array.
I think this saves about 8K of memory.
STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 10118 W: 2282 L: 2138 D: 5698
http://tests.stockfishchess.org/tests/view/
5c6332b60ebc5925cffbdfed
LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 70765 W: 11617 L: 11575 D: 47573
http://tests.stockfishchess.org/tests/view/
5c63379e0ebc5925cffbe0de
Closes https://github.com/official-stockfish/Stockfish/pull/2010
Bench 3261078
protonspring [Thu, 14 Feb 2019 21:23:24 +0000]
Remove skipQuiets variable in search()
This is a functional simplification. The moveCountPruning variable and the
skipQuiets variable are similar enough in function that they can be combined.
This removes the skipQuiets variable in search.
STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 23278 W: 5210 L: 5091 D: 12977
http://tests.stockfishchess.org/tests/view/
5c65dc490ebc5925cffc12e9
LTC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 77107 W: 12792 L: 12761 D: 51554
http://tests.stockfishchess.org/tests/view/
5c65e4360ebc5925cffc1490
Closes https://github.com/official-stockfish/Stockfish/pull/2011
bench 3640330
Fabian Fichter [Wed, 20 Feb 2019 21:50:33 +0000]
Fix placement chess in large-board version
Fabian Fichter [Sun, 17 Feb 2019 13:23:28 +0000]
Support microshogi
https://en.wikipedia.org/wiki/Micro_shogi
No functional change for other variants.
Fabian Fichter [Sun, 17 Feb 2019 12:34:56 +0000]
Tweak piece values for drop games
Decrease value of strong pieces for drop games and games where checks are prohibited.
crazyhouse STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 1687 W: 883 L: 759 D: 45
http://35.161.250.236:6543/tests/view/
5c6723ee6e23db07348e86aa
crazyhouse LTC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 1096 W: 586 L: 471 D: 39
http://35.161.250.236:6543/tests/view/
5c6745716e23db07348e86af
racingkings STC
LLR: 7.35 (-2.94,2.94) [0.00,10.00]
Total: 17215 W: 6182 L: 5762 D: 5271
http://35.161.250.236:6543/tests/view/
5c6724056e23db07348e86ad
racingkings LTC
LLR: 2.98 (-2.94,2.94) [-10.00,5.00]
Total: 1634 W: 527 L: 487 D: 620
http://35.161.250.236:6543/tests/view/
5c67d4776e23db07348e86b5
shogi
LLR: 3.00 (-2.94,2.94) [-10.00,5.00]
Total: 1066 W: 548 L: 488 D: 30
minishogi
LLR: 2.95 (-2.94,2.94) [-10.00,5.00]
Total: 1126 W: 591 L: 531 D: 4
Fabian Fichter [Sun, 10 Feb 2019 20:03:06 +0000]
Simplify evaluation of passed shogi pawns
shogi
LLR: 1.60 (-2.94,2.94) [-10.00,5.00]
Total: 1000 W: 502 L: 473 D: 25
Fabian Fichter [Sun, 10 Feb 2019 19:48:24 +0000]
Tweak king danger for fairy pieces
minishogi
LLR: 2.98 (-2.94,2.94) [0.00,10.00]
Total: 1390 W: 753 L: 630 D: 7
asean
LLR: 3.01 (-2.94,2.94) [-10.00,5.00]
Total: 684 W: 151 L: 111 D: 422
Fabian Fichter [Sun, 10 Feb 2019 10:11:49 +0000]
Fix threat evaluation for shogi pawns
Fabian Fichter [Sat, 9 Feb 2019 23:52:13 +0000]
Merge official-stockfish/master
bench: 4592402
Fabian Fichter [Sat, 9 Feb 2019 23:44:47 +0000]
Merge official-stockfish/master
bench: 4915605
Fabian Fichter [Sat, 9 Feb 2019 23:39:54 +0000]
Merge official-stockfish/master
Fabian Fichter [Sat, 9 Feb 2019 23:26:41 +0000]
Merge official-stockfish/master
bench: 4691733
Fabian Fichter [Sat, 9 Feb 2019 23:22:15 +0000]
Merge official-stockfish/master
Fabian Fichter [Sat, 9 Feb 2019 22:23:57 +0000]
Improve generalization of castling
No functional change.
Fabian Fichter [Sat, 9 Feb 2019 17:28:16 +0000]
Merge official-stockfish/master
bench: 5031310
Fabian Fichter [Sat, 9 Feb 2019 17:13:35 +0000]
Merge official-stockfish/master
bench: 4633927
Fabian Fichter [Sat, 9 Feb 2019 16:58:41 +0000]
Merge official-stockfish/master
Fabian Fichter [Sat, 9 Feb 2019 14:21:00 +0000]
Simplify connection bonus
connect4
LLR: 2.99 (-2.94,2.94) [-10.00,5.00]
Total: 204 W: 108 L: 53 D: 43
Fabian Fichter [Fri, 8 Feb 2019 22:53:36 +0000]
Decrease king evaluation divisor for shogi variants
euroshogi
LLR: 2.98 (-2.94,2.94) [-10.00,5.00]
Total: 250 W: 156 L: 90 D: 4
minishogi
LLR: 3.31 (-2.94,2.94) [-10.00,5.00]
Total: 500 W: 286 L: 213 D: 1
shogi
LLR: 2.97 (-2.94,2.94) [-10.00,5.00]
Total: 506 W: 281 L: 217 D: 8
Fabian Fichter [Fri, 8 Feb 2019 18:07:49 +0000]
Skip king protector bonus when there is no king
protonspring [Sun, 13 Jan 2019 02:30:56 +0000]
Change outposts to single value #1946
This is a functional simplification of the Outposts array
moving it to a single value. This is a duplicate PR because
I couldn't figure out how to fix the original one.
The idea is from @31m059 with formatting recommendations by @snicolet.
See #1940 for additional information.
STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 23933 W: 5279 L: 5162 D: 13492
http://tests.stockfishchess.org/tests/view/
5c3575800ebc596a450c5ecb
LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 41718 W: 6919 L: 6831 D: 27968
http://tests.stockfishchess.org/tests/view/
5c358c440ebc596a450c6117
bench 3783543
Marco Costalba [Tue, 1 Jan 2019 13:13:08 +0000]
Assorted trivial cleanups 1/2019
To address #1862
No functional change.
Marco Costalba [Fri, 8 Feb 2019 09:17:18 +0000]
Log message of: Less king danger...
The commit:
Less king danger if we have a knight near by to defend it
went in withouth proper commit message, here below we add it:
STC: LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 113106 W: 25087 L: 24367 D: 63652
http://tests.stockfishchess.org/tests/view/
5c5517540ebc592fc7bb0eb4
LTC: LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 96669 W: 16318 L: 15872 D: 64479
http://tests.stockfishchess.org/tests/view/
5c55352b0ebc592fc7bb11c8
bench: 3653942