Rak Laptudirm
e0227a6272
Improve comment
...
closes https://github.com/official-stockfish/Stockfish/pull/5249
No functional change
2024-05-18 09:18:14 +02:00
Linmiao Xu
47597641dc
Lower smallnet threshold linearly as pawn count decreases
...
Passed STC:
https://tests.stockfishchess.org/tests/view/6644f677324e96f42f89d894
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 377920 W: 97135 L: 96322 D: 184463
Ptnml(0-2): 1044, 44259, 97588, 44978, 1091
Passed LTC:
https://tests.stockfishchess.org/tests/view/664548af93ce6da3e93b31b3
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 169056 W: 42901 L: 42312 D: 83843
Ptnml(0-2): 58, 18538, 46753, 19115, 64
closes https://github.com/official-stockfish/Stockfish/pull/5252
Bench: 1991750
2024-05-16 14:19:28 +02:00
Muzhen Gaming
e3c9ed77aa
Revert "Reduce more when improving and ttvalue is lower than alpha"
...
The patch regressed significantly at longer time controls.
Passed VLTC:
https://tests.stockfishchess.org/tests/view/6644c7a2bc537f5619453096
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 43336 W: 11177 L: 10884 D: 21275
Ptnml(0-2): 3, 4432, 12507, 4721, 5
Passed VVLTC:
https://tests.stockfishchess.org/tests/view/66450c974aa4fa9a83b6d0b0
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 32394 W: 8350 L: 8072 D: 15972
Ptnml(0-2): 2, 2798, 10317, 3080, 0
closes https://github.com/official-stockfish/Stockfish/pull/5251
Bench: 1594188
2024-05-16 14:17:53 +02:00
Linmiao Xu
541406ab91
Use same nnue divisor for both nets
...
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/6643ceeabc537f56194506f6
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 224800 W: 57910 L: 57896 D: 108994
Ptnml(0-2): 673, 26790, 57519, 26686, 732
Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/6643ff15bc537f5619451719
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 347658 W: 87574 L: 87688 D: 172396
Ptnml(0-2): 207, 39004, 95488, 38956, 174
closes https://github.com/official-stockfish/Stockfish/pull/5250
Bench: 1804704
2024-05-16 14:16:54 +02:00
FauziAkram
dcb0233784
Simplifying improving and worsening deduction formulas
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 77696 W: 20052 L: 19878 D: 37766
Ptnml(0-2): 222, 9124, 19994, 9274, 234
https://tests.stockfishchess.org/tests/view/66440032bc537f561945171e
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 234414 W: 58874 L: 58871 D: 116669
Ptnml(0-2): 96, 26147, 64742, 26102, 120
https://tests.stockfishchess.org/tests/view/6644094cbc537f5619451735
closes https://github.com/official-stockfish/Stockfish/pull/5248
Bench: 1336738
2024-05-15 16:27:03 +02:00
Linmiao Xu
1f3a0fda2e
Use same eval divisor for both nets
...
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/66428f146577e9d2c8a29cf8
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 241024 W: 62173 L: 62177 D: 116674
Ptnml(0-2): 904, 28648, 61407, 28654, 899
Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/6643ae6f1f32a966da74977b
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 193710 W: 48762 L: 48717 D: 96231
Ptnml(0-2): 70, 21599, 53481, 21626, 79
closes https://github.com/official-stockfish/Stockfish/pull/5246
Bench: 1700680
2024-05-15 16:26:00 +02:00
Stefan Geschwentner
9b90cd88f0
Reduce more when improving and ttvalue is lower than alpha
...
More reduction if position is improving but value from TT doesn't
exceeds alpha but the tt move is excluded.
This idea is based on following LMR condition tuning
https://tests.stockfishchess.org/tests/view/66423a1bf9f4e8fc783cba37
by using only three of the four largest terms P[3], P[18] and P[12].
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 27840 W: 7309 L: 7004 D: 13527
Ptnml(0-2): 85, 3219, 7018, 3502, 96
https://tests.stockfishchess.org/tests/view/6643dc1cbc537f56194508ba
Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 191280 W: 48656 L: 48020 D: 94604
Ptnml(0-2): 78, 20979, 52903, 21589, 91
https://tests.stockfishchess.org/tests/view/6643e543bc537f5619451683
closes https://github.com/official-stockfish/Stockfish/pull/5245
Bench: 1430835
2024-05-15 16:20:14 +02:00
mstembera
09dba1f080
Call adjustEval with correct parameters after rescore
...
Set smallNet to false after rescoring so we call adjustEval() w/ correct
parameters.
STC:
https://tests.stockfishchess.org/tests/view/664308687134c82f3f7a4003
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 146912 W: 37856 L: 37756 D: 71300
Ptnml(0-2): 566, 17562, 37122, 17618, 588
LTC:
https://tests.stockfishchess.org/tests/view/6643a0821f32a966da7485d6
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 390414 W: 98015 L: 98173 D: 194226
Ptnml(0-2): 162, 43555, 107929, 43401, 160
closes https://github.com/official-stockfish/Stockfish/pull/5244
Bench: 1819318
2024-05-15 16:19:04 +02:00
Michael Chaly
9e45644c50
Add extra bonus to pawn history for a move that caused a fail low
...
Basically the same idea as it is for continuation/main history, but it
has some tweaks.
1) it has * 2 multiplier for bonus instead of full/half bonus - for
whatever reason this seems to work better;
2) attempts with this type of big bonuses scaled somewhat poorly (or
were unlucky at longer time controls), but after measuring the fact
that average value of pawn history in LMR after adding this bonuses
increased by substantial number (for multiplier 1,5 it increased by
smth like 400~ from 8192 cap) attempts were made to make default pawn
history negative to compensate it - and version with multiplier 2 and
initial fill value -900 passed.
Passed STC:
https://tests.stockfishchess.org/tests/view/66424815f9f4e8fc783cba59
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 115008 W: 30001 L: 29564 D: 55443
Ptnml(0-2): 432, 13629, 28903, 14150, 390
Passed LTC:
https://tests.stockfishchess.org/tests/view/6642f5437134c82f3f7a3ffa
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 56448 W: 14432 L: 14067 D: 27949
Ptnml(0-2): 36, 6268, 15254, 6627, 39
Bench: 1857237
2024-05-15 16:15:15 +02:00
FauziAkram
fa114266fa
Add extra bonus for high-depth condition
...
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 54208 W: 14058 L: 13717 D: 26433
Ptnml(0-2): 166, 6277, 13885, 6602, 174
https://tests.stockfishchess.org/tests/view/664136d8f9f4e8fc783c9b82
Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 112548 W: 28492 L: 28018 D: 56038
Ptnml(0-2): 53, 12186, 31318, 12668, 49
https://tests.stockfishchess.org/tests/view/664143fef9f4e8fc783c9bf6
closes https://github.com/official-stockfish/Stockfish/pull/5242
Bench: 1725980
2024-05-15 16:13:43 +02:00
xoto10
2682c2127d
Use 5% less time on first move
...
Stockfish appears to take too much time on the first move of a game and
then not enough on moves 2,3,4... Probably caused by most of the factors
that increase time usually applying on the first move.
Attempts to give more time to the subsequent moves have not worked so
far, but this change to simply reduce first move time by 5% worked.
STC 10+0.1 :
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 78496 W: 20516 L: 20135 D: 37845
Ptnml(0-2): 340, 8859, 20456, 9266, 327
https://tests.stockfishchess.org/tests/view/663d47bf507ebe1c0e9200ba
LTC 60+0.6 :
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 94872 W: 24179 L: 23751 D: 46942
Ptnml(0-2): 61, 9743, 27405, 10161, 66
https://tests.stockfishchess.org/tests/view/663e779cbb28828150dd9089
closes https://github.com/official-stockfish/Stockfish/pull/5235
Bench: 1876282
2024-05-15 16:09:30 +02:00
mstembera
e608eab8dd
Optimize update_accumulator_refresh_cache()
...
STC https://tests.stockfishchess.org/tests/view/664105df26ac5f9b286d30e6
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 178528 W: 46235 L: 45750 D: 86543
Ptnml(0-2): 505, 17792, 52142, 18363, 462
Combo of two yellow speedups
https://tests.stockfishchess.org/tests/view/6640abf9d163897c63214f5c
LLR: -2.93 (-2.94,2.94) <0.00,2.00>
Total: 355744 W: 91714 L: 91470 D: 172560
Ptnml(0-2): 913, 36233, 103384, 36381, 961
https://tests.stockfishchess.org/tests/view/6628ce073fe04ce4cefc739c
LLR: -2.93 (-2.94,2.94) <0.00,2.00>
Total: 627040 W: 162001 L: 161339 D: 303700
Ptnml(0-2): 2268, 72379, 163532, 73105, 2236
closes https://github.com/official-stockfish/Stockfish/pull/5239
No functional change
2024-05-13 07:32:32 +02:00
Linmiao Xu
0b08953174
Re-evaluate some small net positions for more accurate evals
...
Use main net evals when small net evals hint that higher eval
accuracy may be worth the slower eval speeds. With Finny caches,
re-evals with the main net are less expensive than before.
Original idea by mstembera who I've added as co-author to this PR.
Based on reEval tests by mstembera:
https://tests.stockfishchess.org/tests/view/65e69187b6345c1b934866e5
https://tests.stockfishchess.org/tests/view/65e863aa0ec64f0526c3e991
A few variants of this patch also passed LTC:
https://tests.stockfishchess.org/tests/view/663d2108507ebe1c0e91f407
https://tests.stockfishchess.org/tests/view/663e388c3a2f9702074bc152
Passed STC:
https://tests.stockfishchess.org/tests/view/663dadbd1a61d6377f190e2c
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 92320 W: 23941 L: 23531 D: 44848
Ptnml(0-2): 430, 10993, 22931, 11349, 457
Passed LTC:
https://tests.stockfishchess.org/tests/view/663ef48b2948bf9aa698690c
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 98934 W: 24907 L: 24457 D: 49570
Ptnml(0-2): 48, 10952, 27027, 11382, 58
closes https://github.com/official-stockfish/Stockfish/pull/5238
bench 1876282
Co-Authored-By: mstembera <5421953+mstembera@users.noreply.github.com>
2024-05-13 07:30:18 +02:00
Linmiao Xu
53f363041c
Simplify npm constants when adjusting eval
...
Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/663d0c4f507ebe1c0e91ec8d
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 162784 W: 41987 L: 41906 D: 78891
Ptnml(0-2): 520, 19338, 41591, 19427, 516
Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/663d20fd507ebe1c0e91f405
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 457242 W: 115022 L: 115250 D: 226970
Ptnml(0-2): 271, 51566, 125179, 51330, 275
closes https://github.com/official-stockfish/Stockfish/pull/5237
Bench: 2238216
2024-05-13 07:25:22 +02:00
Michael Chaly
d3f081ed8a
Adjust standpat return value in qsearch
...
Instead of returning value itself return value between it and beta for non pv nodes - analogous to what we do after actual search there.
Passed STC:
https://tests.stockfishchess.org/tests/view/663cb1b4c0b75d7f7b98188e
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 131552 W: 34131 L: 33673 D: 63748
Ptnml(0-2): 420, 15446, 33600, 15876, 434
Passed LTC:
https://tests.stockfishchess.org/tests/view/663cda5dc0b75d7f7b981c6f
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 282798 W: 71658 L: 70833 D: 140307
Ptnml(0-2): 112, 31187, 77979, 32006, 115
closes https://github.com/official-stockfish/Stockfish/pull/5233
Bench: 1606672
2024-05-13 07:22:11 +02:00
Muzhen Gaming
813c5aa532
VVLTC search tune
...
Tuned at 111k games of VVLTC.
Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/664090c6d163897c63214324
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 83046 W: 21071 L: 20747 D: 41228
Ptnml(0-2): 2, 7574, 26048, 7896, 3
Passed VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/6640cb2abaa6260a5688dc17
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 68630 W: 17620 L: 17270 D: 33740
Ptnml(0-2): 4, 6242, 21471, 6596, 2
closes https://github.com/official-stockfish/Stockfish/pull/5240
Bench: 1752471
2024-05-13 07:20:03 +02:00
Shawn Xu
540545d127
simplify away quietCheckEvasions pruning
...
simplifies away the pruning of quiet evasion moves in quiescent search.
Passed STC:
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 343520 W: 88356 L: 88470 D: 166694
Ptnml(0-2): 1061, 40073, 89706, 39759, 1161
https://tests.stockfishchess.org/tests/view/663c7ddfc0b75d7f7b980f3b
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 168744 W: 42454 L: 42384 D: 83906
Ptnml(0-2): 75, 18678, 46782, 18776, 61
https://tests.stockfishchess.org/tests/view/663ce34fc0b75d7f7b981ed9
closes https://github.com/official-stockfish/Stockfish/pull/5231
bench 3681552
2024-05-13 07:16:59 +02:00
xu-shawn
b8812138e8
Fix usage of abs vs std::abs
...
closes https://github.com/official-stockfish/Stockfish/pull/5229
no functional change
2024-05-13 07:15:25 +02:00
Shawn Xu
c43425b0b1
Simplify Away Negative Extension
...
This patch simplifies away the negative extension applied when the value returned by the transposition table is assumed to fail low over the value of reduced search.
Passed STC:
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 248736 W: 64293 L: 64302 D: 120141
Ptnml(0-2): 925, 29833, 62831, 29884, 895
https://tests.stockfishchess.org/tests/view/663bee3bca93dad645f7f64a
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 254970 W: 64289 L: 64308 D: 126373
Ptnml(0-2): 110, 28428, 70422, 28421, 104
https://tests.stockfishchess.org/tests/view/663c11f0c0b75d7f7b97d4bb
closes https://github.com/official-stockfish/Stockfish/pull/5226
Bench: 2353057
2024-05-09 09:02:57 +02:00
FauziAkram
574ad14b32
Simplify depth formula based on score improvement
...
Simplify depth formula based on score improvement.
This idea was first tried by cj5716
Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 347104 W: 89683 L: 89804 D: 167617
Ptnml(0-2): 1357, 38824, 93307, 38711, 1353
https://tests.stockfishchess.org/tests/view/66378edf9819650825aa75d0
Passed LTC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 63000 W: 15851 L: 15694 D: 31455
Ptnml(0-2): 22, 5396, 20499, 5569, 14
https://tests.stockfishchess.org/tests/view/663c04e5c0b75d7f7b97d461
closes https://github.com/official-stockfish/Stockfish/pull/5225
Bench: 2691699
Co-Authored-By: cj5716 <125858804+cj5716@users.noreply.github.com>
2024-05-09 09:00:32 +02:00
Michael Chaly
23439e4096
Remove conthist 3 from moves loop pruning
...
Followup to previous gainer that made it twice less impactful there - this patch removes it entirely as a simplification.
Passed STC:
https://tests.stockfishchess.org/tests/view/6637aa7e9819650825aa93e0
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 26208 W: 6930 L: 6694 D: 12584
Ptnml(0-2): 113, 2997, 6652, 3225, 117
Passed LTC:
https://tests.stockfishchess.org/tests/view/66383cba493aaaf4b7ea90c2
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 67866 W: 17294 L: 17118 D: 33454
Ptnml(0-2): 46, 7627, 18415, 7795, 50
closes https://github.com/official-stockfish/Stockfish/pull/5221
Bench: 2691699
2024-05-09 08:56:36 +02:00
Michael Chaly
3b4ddf4ae6
Simplify away conthist 3 from statscore
...
Following previous elo gainer that gained by making conthist 3 less important in pruning this patch simplifies away this history from calculation of statscore.
Passed STC:
https://tests.stockfishchess.org/tests/view/6637aa7e9819650825aa93e0
LLR: 3.00 (-2.94,2.94) <-1.75,0.25>
Total: 35392 W: 9352 L: 9120 D: 16920
Ptnml(0-2): 141, 4145, 8888, 4385, 137
Passed LTC:
https://tests.stockfishchess.org/tests/view/66383cd8493aaaf4b7ea90c5
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 33948 W: 8714 L: 8503 D: 16731
Ptnml(0-2): 39, 3701, 9270, 3938, 26
closes https://github.com/official-stockfish/Stockfish/pull/5220
Bench: 2508571
2024-05-09 08:52:06 +02:00
FauziAkram
9d6dab06a8
simplify moveCountPruning
...
no (significant) speedup upon renewed testing
Passed stc:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 88992 W: 22779 L: 22633 D: 43580
Ptnml(0-2): 137, 8706, 26681, 8818, 154
https://tests.stockfishchess.org/tests/view/6636c4844b68b70d85800dae
closes https://github.com/official-stockfish/Stockfish/pull/5213
No functional change.
2024-05-09 08:48:29 +02:00
MinetaS
2dbb44e28d
Fix nodestime
...
1. The current time management system utilizes limits.inc and
limits.time, which can represent either milliseconds or node count,
depending on whether the nodestime option is active. There have been
several modifications which brought Elo gain for typical uses (i.e.
real-time matches), however some of these changes overlooked such
distinction. This patch adjusts constants and multiplication/division to
more accurately simulate real TC conditions when nodestime is used.
2. The advance_nodes_time function has a bug that can extend the time
limit when availableNodes reaches exact zero. This patch fixes the bug
by initializing the variable to -1 and make sure it does not go below
zero.
3. elapsed_time function is newly introduced to print PV in the UCI
output based on real time. This makes PV output more consistent with the
behavior of trivial use cases.
closes https://github.com/official-stockfish/Stockfish/pull/5186
No functional changes
2024-05-09 08:42:56 +02:00
rn5f107s2
db147fe258
IIR on cutnodes if there is a ttMove but the ttBound is upper
...
If there is an upper bound stored in the transposition table, but we still have a ttMove, the upperbound indicates that the last time the ttMove was tried, it failed low. This fail low indicates that the ttMove may not be good, so this patch introduces a depth reduction of one for cutnodes with such ttMoves.
Passed STC:
https://tests.stockfishchess.org/tests/view/663be4d1ca93dad645f7f45f
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 139424 W: 35900 L: 35433 D: 68091
Ptnml(0-2): 425, 16357, 35743, 16700, 487
Passed LTC:
https://tests.stockfishchess.org/tests/view/663bec95ca93dad645f7f5c8
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 129690 W: 32902 L: 32390 D: 64398
Ptnml(0-2): 63, 14304, 35610, 14794, 74
closes https://github.com/official-stockfish/Stockfish/pull/5227
bench 2257437
2024-05-09 08:38:04 +02:00
Michael Chaly
d1b8d8bab3
Refactor quiet moves pruning in qsearch
...
Make it formula more in line with what we use in search - current formula is more or less the one we used years ago for search but since then it was remade, this patch remakes qsearch formula to almost exactly the same as we use in search - with sum of conthist 0, 1 and pawn structure history.
Passed STC:
https://tests.stockfishchess.org/tests/view/6639c8421343f0cb16716206
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 84992 W: 22414 L: 22019 D: 40559
Ptnml(0-2): 358, 9992, 21440, 10309, 397
Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 119136 W: 30407 L: 29916 D: 58813
Ptnml(0-2): 46, 13192, 32622, 13641, 67
closes https://github.com/official-stockfish/Stockfish/pull/5224
Bench: 2138659
2024-05-09 08:33:07 +02:00
FauziAkram
3bdfa0fb4a
Depth dependent statscore based reductions
...
Test a modification of Fawzi's PR #5223 , against that PR.
parameters locally tuned with nevergrad4sf.
passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 1047424 W: 271478 L: 269649 D: 506297
Ptnml(0-2): 3851, 124543, 265290, 125982, 4046
https://tests.stockfishchess.org/tests/view/663b0889ca93dad645f7c58c
passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 796236 W: 201712 L: 199825 D: 394699
Ptnml(0-2): 361, 88381, 218778, 90206, 392
https://tests.stockfishchess.org/tests/view/663be6adca93dad645f7f509
https://github.com/official-stockfish/Stockfish/pull/5228
Bench: 3346224
2024-05-09 08:29:33 +02:00
FauziAkram
2d5e248f58
Tweak reduction formula based on depth
...
The idea came to me by checking for trends from the megafauzi tunes, since the values of the divisor for this specific formula were as follows:
stc: 15990
mtc: 16117
ltc: 14805
vltc: 12719
new vltc passed by Muzhen: 12076
This shows a clear trend related to time control, the higher it is, the lower the optimum value for the divisor seems to be.
So I tried a simple formula, using educated guesses based on some calculations, tests show it works pretty fine, and it can still be further tuned at VLTC in the future to scale even better.
Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 431360 W: 110791 L: 109898 D: 210671
Ptnml(0-2): 1182, 50846, 110698, 51805, 1149
https://tests.stockfishchess.org/tests/view/663770409819650825aa269f
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 114114 W: 29109 L: 28625 D: 56380
Ptnml(0-2): 105, 12628, 31101, 13124, 99
https://tests.stockfishchess.org/tests/view/66378c099819650825aa73f6
https://github.com/official-stockfish/Stockfish/pull/5223
bench: 2273551
2024-05-09 08:26:35 +02:00
Muzhen Gaming
070e564c38
VVLTC search tune
...
This patch is the result of two tuning stages:
1. ~32k games at 60+0.6 th8:
https://tests.stockfishchess.org/tests/view/662d9dea6115ff6764c7f817
2. ~193k games at 80+0.8 th6, based on PR #5211 :
https://tests.stockfishchess.org/tests/view/663587e273559a8aa857ca00 .
Based on extensive VVLTC tuning and testing both before and after
#5211 , it is observed that introduction of new extensions positively
affected the search tune results.
Passed VVLTC 70+0.7 th7 1st sprt: https://tests.stockfishchess.org/tests/view/6636c6f04b68b70d85801409
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 18566 W: 4864 L: 4620 D: 9082
Ptnml(0-2): 0, 1608, 5827, 1844, 4
Passed VVLTC 70+0.7 th7 2nd sprt: https://tests.stockfishchess.org/tests/view/6636d4b84b68b70d85802ab7
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 43142 W: 11141 L: 10838 D: 21163
Ptnml(0-2): 4, 3915, 13427, 4224, 1
Passed VVLTC 70+0.7 3rd sprt: https://tests.stockfishchess.org/tests/view/66376b4f9819650825aa230b
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 40322 W: 10374 L: 10076 D: 19872
Ptnml(0-2): 1, 3660, 12544, 3952, 4
The first two sprts were run against passed #5211 . The third sprt was
run against latest master.
closes https://github.com/official-stockfish/Stockfish/pull/5216
Bench: 2180675
2024-05-05 15:11:53 +02:00
cj5716
61f12a4c38
Simplify accumulator refreshes
...
Passed Non-Regression STC:
https://tests.stockfishchess.org/tests/view/6631f5d5d01fb9ac9bcdc7d0
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 57472 W: 14979 L: 14784 D: 27709
Ptnml(0-2): 185, 6486, 15192, 6695, 178
closes https://github.com/official-stockfish/Stockfish/pull/5207
No functional change
2024-05-05 15:11:37 +02:00
Michael Chaly
f161261245
Adjust history usage in moves loop pruning
...
After experiments with conthist 5 addition failed really bad divions by 2 passed as a gainer.
Passed STC:
https://tests.stockfishchess.org/tests/view/6636d7114b68b70d858035ce
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 35936 W: 9287 L: 8976 D: 17673
Ptnml(0-2): 81, 4129, 9234, 4446, 78
Passed LTC:
https://tests.stockfishchess.org/tests/view/6636ddb64b68b70d858040a8
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 82428 W: 21035 L: 20622 D: 40771
Ptnml(0-2): 29, 8985, 22775, 9394, 31
closes https://github.com/official-stockfish/Stockfish/pull/5217
Bench: 2309253
2024-05-05 13:06:22 +02:00
cj5716
6da1590de0
Some history fixes and tidy-up
...
This adds the functions `update_refutations` and `update_quiet_histories` to better distinguish the two. `update_quiet_stats` now just calls both of these functions.
The functional side of this patch is two-fold:
1. Stop refutations being updated when we carry out multicut
2. Update pawn history every time we update other quiet histories
Yellow STC:
LLR: -2.95 (-2.94,2.94) <0.00,2.00>
Total: 238976 W: 61506 L: 61415 D: 116055
Ptnml(0-2): 846, 28628, 60456, 28705, 853
https://tests.stockfishchess.org/tests/view/66321b5ed01fb9ac9bcdca83
However, it passed in <-1.75, 0.25> bounds:
$ python3 sprt.py --wins 61506 --losses 61415 --draws 116055 --elo0 -1.75 --elo1 0.25
ELO: 0.132 +- 0.998 [-0.865, 1.13]
LLR: 4.15 [-1.75, 0.25] (-2.94, 2.94)
H1 Accepted
Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 399126 W: 100730 L: 100896 D: 197500
Ptnml(0-2): 116, 44328, 110843, 44158, 118
https://tests.stockfishchess.org/tests/view/66357b0473559a8aa857ba6f
closes #5215
Bench 2370967
2024-05-05 13:04:37 +02:00
FauziAkram
d712ed38d1
Simplify shuffling and optimism divisors to constants
...
Shuffling divisor and Optimism divisors passed STC & LTC separately:
shuf STC: https://tests.stockfishchess.org/tests/view/66356316b4e9bdbc7228b995
shuf LTC: https://tests.stockfishchess.org/tests/view/6635815a73559a8aa857c1dc
opt STC: https://tests.stockfishchess.org/tests/view/66356326b4e9bdbc7228b9a0
opt LTC: https://tests.stockfishchess.org/tests/view/663615c673559a8aa8589f8a
And then passed LTC together:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 178278 W: 45039 L: 44979 D: 88260
Ptnml(0-2): 43, 19776, 49460, 19798, 62
https://tests.stockfishchess.org/tests/view/66363f19cdb7cf5da64e22a3
closes https://github.com/official-stockfish/Stockfish/pull/5212
Bench: 2198243
2024-05-05 13:02:42 +02:00
Viren6
741aaf8a38
Introduce Quadruple Extensions
...
This patch introduces quadruple extensions, with the new condition of not ttPv. It also generalises all margins, so that extensions can still occur if conditions are only partially fulfilled, but with a stricter margin.
Failed STC:
LLR: -2.94 (-2.94,2.94) <0.00,2.00>
Total: 16096 W: 3984 L: 4228 D: 7884
Ptnml(0-2): 72, 2067, 4002, 1847, 60
https://tests.stockfishchess.org/tests/view/66316422d01fb9ac9bcdbdcd
Passed VVLTC 1:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 96660 W: 24550 L: 24210 D: 47900
Ptnml(0-2): 5, 8776, 30426, 9120, 3
https://tests.stockfishchess.org/tests/view/66361f2c74fa3f41ef2ee091
Passed VVLTC 2:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 80546 W: 20495 L: 20120 D: 39931
Ptnml(0-2): 6, 7477, 24929, 7858, 3
https://tests.stockfishchess.org/tests/view/66350cf739ba8e443112b3fa
closes https://github.com/official-stockfish/Stockfish/pull/5211
bench 2233743
2024-05-05 12:53:58 +02:00
Michael Chaly
351a2e22dd
Add extra bonuses to some moves that forced a fail low
...
The previous patch on this idea was giving bonuses to this moves if best value of search is far below current static evaluation.
This patch does similar thing but adds extra bonus when best value of search is far below static evaluation before previous move.
Passed STC:
https://tests.stockfishchess.org/tests/view/66355fc819566d64b481d6a4
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 454144 W: 116575 L: 115656 D: 221913
Ptnml(0-2): 1060, 53410, 117215, 54325, 1062
Passed LTC:
https://tests.stockfishchess.org/tests/view/6635c61a73559a8aa858012d
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 136578 W: 34858 L: 34335 D: 67385
closes https://github.com/official-stockfish/Stockfish/pull/5209
Bench: 1614825
2024-05-05 12:42:30 +02:00
cj5716
8ee9905d8b
Remove PSQT-only mode
...
Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 94208 W: 24270 L: 24112 D: 45826
Ptnml(0-2): 286, 11186, 24009, 11330, 293
https://tests.stockfishchess.org/tests/view/6635ddd773559a8aa8582826
Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 114960 W: 29107 L: 28982 D: 56871
Ptnml(0-2): 37, 12683, 31924, 12790, 46
https://tests.stockfishchess.org/tests/view/663604a973559a8aa85881ed
closes #5214
Bench 1653939
2024-05-05 12:36:20 +02:00
Disservin
be026bdcb2
Clear Workers after changing the network
...
ensures internal state (e.g. accumulator cache) is consistent with network
closes https://github.com/official-stockfish/Stockfish/pull/5204
No functional change
2024-05-05 12:30:28 +02:00
mstembera
be142337d8
Accumulator cache bugfix and cleanup
...
STC:
https://tests.stockfishchess.org/tests/view/663068913a05f1bf7a511dc2
LLR: 2.98 (-2.94,2.94) <-1.75,0.25>
Total: 70304 W: 18211 L: 18026 D: 34067
Ptnml(0-2): 232, 7966, 18582, 8129, 243
1) Fixes a bug introduced in
https://github.com/official-stockfish/Stockfish/pull/5194 . Only one
psqtOnly flag was used for two perspectives which was causing
wrong entries to be cleared and marked.
2) The finny caches should be cleared like histories and not at the
start of every search.
closes https://github.com/official-stockfish/Stockfish/pull/5203
No functional change
2024-05-01 14:17:32 +02:00
cj5716
6a9b8a0c7b
Optimise NNUE Accumulator updates
...
Passed STC:
https://tests.stockfishchess.org/tests/view/662e3c6a5e9274400985a741
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 86176 W: 22284 L: 21905 D: 41987
Ptnml(0-2): 254, 9572, 23051, 9963, 248
closes https://github.com/official-stockfish/Stockfish/pull/5202
No functional change
2024-05-01 14:10:57 +02:00
Ciekce
eb20de36c0
Avoid unnecessary creation of accumulator cache
...
Saves a (currently) 800 KB allocation and deallocation when running
`eval`, not particularly significant and zero impact on play but not
necessary either.
closes https://github.com/official-stockfish/Stockfish/pull/5201
No functional change
2024-05-01 14:10:57 +02:00
Dubslow
5d72032559
Use capture history to better judge which sacrifices to explore
...
This idea has been bouncing around a while. @Vizvezdenec tried it a
couple years ago in Stockfish without results, but its recent arrival in
Ethereal inspired him and thence me to try it afresh in Stockfish.
(Also factor out the now-common code with futpruning for captures.)
STC:
https://tests.stockfishchess.org/tests/view/662355bc3fe04ce4cefc18ac
LLR: 2.92 (-2.94,2.94) <0.00,2.00>
Total: 45760 W: 11970 L: 11640 D: 22150
Ptnml(0-2): 124, 5371, 11625, 5571, 189
LTC:
https://tests.stockfishchess.org/tests/view/662dda396115ff6764c817c9
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 243828 W: 62042 L: 61287 D: 120499
Ptnml(0-2): 211, 27202, 66329, 27965, 207
closes https://github.com/official-stockfish/Stockfish/pull/5200
Bench: 1480008
2024-05-01 14:10:50 +02:00
Stefan Geschwentner
0fe6428645
More reduction at cut nodes which are not a former PV node
...
But the tt move and first killer are excluded.
This idea is based on following LMR condition tuning
https://tests.stockfishchess.org/tests/view/66228bed3fe04ce4cefc0c71 by
using only the two largest terms P[0] and P[1].
Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 173248 W: 45091 L: 44565 D: 83592
Ptnml(0-2): 693, 20534, 43673, 21002, 722
https://tests.stockfishchess.org/tests/view/6629603b3fe04ce4cefc7d37
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 722394 W: 183231 L: 181487 D: 357676
Ptnml(0-2): 462, 80650, 197252, 82348, 485
https://tests.stockfishchess.org/tests/view/662cbe45d46f72253dcff7bf
closes https://github.com/official-stockfish/Stockfish/pull/5199
Bench: 1619613
2024-04-28 21:46:45 +02:00
Stefan Geschwentner
48a3b7c0ee
Simplify non-pawn material divisor to a constant
...
Passed STC:
https://tests.stockfishchess.org/tests/view/662942603fe04ce4cefc7aba
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 272832 W: 70456 L: 70497 D: 131879
Ptnml(0-2): 1020, 32619, 69154, 32628, 995
Passed LTC:
https://tests.stockfishchess.org/tests/view/662dfe3b6115ff6764c829eb
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 100254 W: 25446 L: 25303 D: 49505
Ptnml(0-2): 121, 11292, 27166, 11419, 129
closes https://github.com/official-stockfish/Stockfish/pull/5198
Bench: 1544645
2024-04-28 21:43:46 +02:00
cj5716
834e8ff619
Penalise the TT move in multicut
...
Passed STC:
LLR: 2.99 (-2.94,2.94) <0.00,2.00>
Total: 185504 W: 48079 L: 47533 D: 89892
Ptnml(0-2): 716, 21866, 46988, 22520, 662
https://tests.stockfishchess.org/tests/view/662d9e1d6115ff6764c7f83d
Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 75612 W: 19351 L: 18948 D: 37313
Ptnml(0-2): 46, 8363, 20592, 8752, 53
https://tests.stockfishchess.org/tests/view/662dc9dc6115ff6764c80fea
closes https://github.com/official-stockfish/Stockfish/pull/5195
Bench: 1415435
2024-04-28 21:36:34 +02:00
mstembera
a129c0695b
Combine remove and add in update_accumulator_refresh_cache()
...
Combine remove and add in update_accumulator_refresh_cache().
Move remove before add to match other parts of the code.
STC:
https://tests.stockfishchess.org/tests/view/662d96dc6115ff6764c7f4ca
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 364032 W: 94421 L: 93624 D: 175987
Ptnml(0-2): 1261, 41983, 94811, 42620, 1341
closes https://github.com/official-stockfish/Stockfish/pull/5194
Bench: 1836777
2024-04-28 21:35:48 +02:00
mstembera
940a3a7383
Cache small net w/ psqtOnly support
...
Caching the small net in the same way as the big net allows them to
share the same code path and completely removes
update_accumulator_refresh().
STC:
https://tests.stockfishchess.org/tests/view/662bfb5ed46f72253dcfed85
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 151712 W: 39252 L: 39158 D: 73302
Ptnml(0-2): 565, 17474, 39683, 17570, 564
closes https://github.com/official-stockfish/Stockfish/pull/5194
Bench: 1836777
2024-04-28 21:30:19 +02:00
Joost VandeVondele
bc45cbc820
Output some basic info about the used networks
...
Adds size in memory as well as layer sizes as in
info string NNUE evaluation using nn-ae6a388e4a1a.nnue (132MiB, (22528, 3072, 15, 32, 1))
info string NNUE evaluation using nn-baff1ede1f90.nnue (6MiB, (22528, 128, 15, 32, 1))
For example, the size in MiB is useful to keep the fishtest memory sizes up-to-date,
the L1-L3 sizes give a useful hint about the architecture used.
closes https://github.com/official-stockfish/Stockfish/pull/5193
No functional change
2024-04-28 21:27:28 +02:00
Disservin
3502c8ae42
Fix missing initialization of AccumulatorCaches in Eval::trace
...
Add a constructor to `AccumulatorCaches` instead of just calling
`clear(networks)` to prevent similar issues from appearing in the
future.
fixes https://github.com/official-stockfish/Stockfish/issues/5190
closes https://github.com/official-stockfish/Stockfish/pull/5191
No functional change
2024-04-28 21:26:36 +02:00
xoto10
886ed90ec3
Use less time on recaptures
...
Credit for the idea goes to peregrine on discord.
Passed STC 10+0.1:
https://tests.stockfishchess.org/tests/view/662652623fe04ce4cefc48cf
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 75712 W: 19793 L: 19423 D: 36496
Ptnml(0-2): 258, 8487, 20023, 8803, 285
Passed LTC 60+0.6:
https://tests.stockfishchess.org/tests/view/6627495e3fe04ce4cefc59b6
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 49788 W: 12743 L: 12404 D: 24641
Ptnml(0-2): 29, 5141, 14215, 5480, 29
The code was updated slightly and tested for non-regression against the
original code at STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 41952 W: 10912 L: 10698 D: 20342
Ptnml(0-2): 133, 4825, 10835, 5061, 122
https://tests.stockfishchess.org/tests/view/662d84f56115ff6764c7e438
closes https://github.com/official-stockfish/Stockfish/pull/5189
Bench: 1836777
2024-04-28 21:26:25 +02:00
gab8192
49ef4c935a
Implement accumulator refresh table
...
For each thread persist an accumulator cache for the network, where each
cache contains multiple entries for each of the possible king squares.
When the accumulator needs to be refreshed, the cached entry is used to more
efficiently update the accumulator, instead of rebuilding it from scratch.
This idea, was first described by Luecx (author of Koivisto) and
is commonly referred to as "Finny Tables".
When the accumulator needs to be refreshed, instead of filling it with
biases and adding every piece from scratch, we...
1. Take the `AccumulatorRefreshEntry` associated with the new king bucket
2. Calculate the features to activate and deactivate (from differences
between bitboards in the entry and bitboards of the actual position)
3. Apply the updates on the refresh entry
4. Copy the content of the refresh entry accumulator to the accumulator
we were refreshing
5. Copy the bitboards from the position to the refresh entry, to match
the newly updated accumulator
Results at STC:
https://tests.stockfishchess.org/tests/view/662301573fe04ce4cefc1386
(first version)
https://tests.stockfishchess.org/tests/view/6627fa063fe04ce4cefc6560
(final)
Non-Regression between first and final:
https://tests.stockfishchess.org/tests/view/662801e33fe04ce4cefc660a
STC SMP:
https://tests.stockfishchess.org/tests/view/662808133fe04ce4cefc667c
closes https://github.com/official-stockfish/Stockfish/pull/5183
No functional change
2024-04-24 18:38:20 +02:00
