Dev Builds » 20260824-1629

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host	Duration	Avg Base NPS	Games	WLD	Standard Elo	Ptnml(0-2)	Gamepair Elo
ncm-dbt-01	06:48:18	584030	4000	1791 273 1936	+138.79 ± 4.37	0 19 483 1459 39	+329.85 ± 15.49
ncm-dbt-02	06:48:19	590990	4000	1788 287 1925	+137.07 ± 4.43	0 19 505 1432 44	+321.56 ± 15.13
ncm-dbt-03	06:48:34	577814	4014	1829 303 1882	+139.06 ± 4.33	0 12 501 1450 44	+329.02 ± 15.16
ncm-dbt-04	06:46:51	566947	3994	1806 307 1881	+137.1 ± 4.51	1 26 485 1443 42	+322.74 ± 15.47
ncm-dbt-05	06:49:45	603790	3992	1819 298 1875	+139.41 ± 4.54	0 17 502 1416 61	+323.76 ± 15.17
			20000	9033 1468 9499	+138.28 ± 1.98	1 93 2476 7200 230	+325.37 ± 6.83

Test Detail

ID	Host	Base NPS	Games	WLD	Standard Elo	Ptnml(0-2)	Gamepair Elo	PGN
483305	ncm-dbt-03	578630	14	6 3 5	+75.56 ± 67.89	0 0 4 3 0	+159.09 ± 177.81	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1353201195 \ -pgnout ncm-dbt-20260824-1629-041.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483304	ncm-dbt-05	602829	492	231 47 214	+136.56 ± 13.12	0 2 66 170 8	+312.09 ± 42.22	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2834166553 \ -pgnout ncm-dbt-20260824-1629-040.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483303	ncm-dbt-04	566770	494	224 30 240	+144.18 ± 12.8	0 2 57 180 8	+340.46 ± 45.7	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1847643850 \ -pgnout ncm-dbt-20260824-1629-039.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483302	ncm-dbt-01	580862	500	227 38 235	+138.18 ± 13.12	0 5 57 182 6	+324.17 ± 45.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 137696333 \ -pgnout ncm-dbt-20260824-1629-038.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483301	ncm-dbt-02	591426	500	230 35 235	+143.07 ± 12.75	0 2 59 181 8	+336.46 ± 44.87	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3685198577 \ -pgnout ncm-dbt-20260824-1629-037.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483300	ncm-dbt-03	575313	500	218 30 252	+137.37 ± 12.36	0 0 69 174 7	+318.25 ± 40.94	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1119533195 \ -pgnout ncm-dbt-20260824-1629-036.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483299	ncm-dbt-04	566060	500	237 35 228	+148.85 ± 12.7	0 2 53 186 9	+356.21 ± 47.52	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2785693548 \ -pgnout ncm-dbt-20260824-1629-035.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483298	ncm-dbt-05	605072	500	228 41 231	+136.56 ± 12.39	0 1 67 176 6	+318.25 ± 41.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2529418282 \ -pgnout ncm-dbt-20260824-1629-034.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483297	ncm-dbt-01	581777	500	228 40 232	+137.37 ± 12.76	0 2 65 176 7	+318.25 ± 42.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3711324499 \ -pgnout ncm-dbt-20260824-1629-033.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483296	ncm-dbt-02	591297	500	212 31 257	+131.74 ± 11.94	0 2 67 179 2	+312.48 ± 41.9	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 343035975 \ -pgnout ncm-dbt-20260824-1629-032.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483295	ncm-dbt-03	578918	500	233 37 230	+143.89 ± 12.3	0 3 53 189 5	+349.43 ± 47.56	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2814241939 \ -pgnout ncm-dbt-20260824-1629-031.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483294	ncm-dbt-04	568037	500	223 42 235	+131.74 ± 13.12	0 5 64 176 5	+304.07 ± 43.1	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 626354689 \ -pgnout ncm-dbt-20260824-1629-030.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483293	ncm-dbt-05	603814	500	226 36 238	+138.99 ± 12.3	0 1 64 179 6	+327.18 ± 42.83	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3361191377 \ -pgnout ncm-dbt-20260824-1629-029.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483292	ncm-dbt-02	591642	500	222 31 247	+139.81 ± 12.47	0 2 61 181 6	+330.23 ± 44.08	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 375166288 \ -pgnout ncm-dbt-20260824-1629-028.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483291	ncm-dbt-01	585169	500	214 24 262	+138.99 ± 12.09	0 3 57 187 3	+336.46 ± 45.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 84017022 \ -pgnout ncm-dbt-20260824-1629-027.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483290	ncm-dbt-03	579042	500	225 40 235	+134.95 ± 12.64	0 2 67 175 6	+312.48 ± 41.9	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1795427124 \ -pgnout ncm-dbt-20260824-1629-026.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483289	ncm-dbt-04	566533	500	223 38 239	+134.95 ± 12.64	1 2 61 183 3	+324.17 ± 44.15	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2322839040 \ -pgnout ncm-dbt-20260824-1629-025.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483288	ncm-dbt-05	603142	500	223 39 238	+134.15 ± 12.67	0 4 62 180 4	+315.35 ± 43.81	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4062329430 \ -pgnout ncm-dbt-20260824-1629-024.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483287	ncm-dbt-02	590911	500	225 43 232	+132.54 ± 11.91	0 2 66 180 2	+315.35 ± 42.24	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 753597638 \ -pgnout ncm-dbt-20260824-1629-023.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483286	ncm-dbt-03	577807	500	233 42 225	+139.81 ± 12.05	0 3 56 188 3	+339.63 ± 46.2	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1880298828 \ -pgnout ncm-dbt-20260824-1629-022.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483285	ncm-dbt-01	585674	500	225 35 240	+138.99 ± 13.1	0 3 62 177 8	+321.19 ± 43.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1125478045 \ -pgnout ncm-dbt-20260824-1629-021.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483284	ncm-dbt-04	566099	500	223 46 231	+128.55 ± 13.19	0 4 71 169 6	+290.66 ± 40.76	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2155949986 \ -pgnout ncm-dbt-20260824-1629-020.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483283	ncm-dbt-01	581777	500	225 26 249	+146.36 ± 11.74	0 1 54 190 5	+359.68 ± 46.95	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4229138361 \ -pgnout ncm-dbt-20260824-1629-019.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483282	ncm-dbt-03	576905	500	228 38 234	+138.99 ± 12.3	0 0 67 176 7	+324.16 ± 41.61	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4268451465 \ -pgnout ncm-dbt-20260824-1629-018.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483281	ncm-dbt-05	604532	500	225 31 244	+142.25 ± 13.56	0 5 55 181 9	+330.23 ± 46.62	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2648486620 \ -pgnout ncm-dbt-20260824-1629-017.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483280	ncm-dbt-02	589240	500	229 40 231	+138.18 ± 12.73	0 3 61 180 6	+324.17 ± 44.15	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2388687407 \ -pgnout ncm-dbt-20260824-1629-016.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483279	ncm-dbt-04	565744	500	223 37 240	+135.76 ± 11.36	0 1 63 185 1	+330.23 ± 43.2	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 554840530 \ -pgnout ncm-dbt-20260824-1629-015.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483278	ncm-dbt-01	586139	500	229 34 237	+143.07 ± 11.47	0 1 56 190 3	+352.8 ± 46.04	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2265971734 \ -pgnout ncm-dbt-20260824-1629-014.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483277	ncm-dbt-03	576537	500	235 40 225	+143.07 ± 12.12	0 0 62 181 7	+339.63 ± 43.41	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3434009815 \ -pgnout ncm-dbt-20260824-1629-013.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483276	ncm-dbt-05	599539	500	234 42 224	+140.62 ± 12.64	0 2 61 180 7	+330.23 ± 44.08	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2012102228 \ -pgnout ncm-dbt-20260824-1629-012.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483275	ncm-dbt-02	587537	500	219 33 248	+135.76 ± 12.21	0 1 67 177 5	+318.25 ± 41.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4095535627 \ -pgnout ncm-dbt-20260824-1629-011.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483274	ncm-dbt-04	565666	500	218 45 237	+125.38 ± 13.96	0 9 64 172 5	+282.94 ± 42.98	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 9548619 \ -pgnout ncm-dbt-20260824-1629-010.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483273	ncm-dbt-03	579289	500	220 40 240	+130.94 ± 11.96	0 2 68 178 2	+309.64 ± 41.56	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 590000650 \ -pgnout ncm-dbt-20260824-1629-009.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483272	ncm-dbt-01	585717	500	228 38 234	+138.99 ± 11.66	0 0 64 182 4	+333.32 ± 42.66	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3552140888 \ -pgnout ncm-dbt-20260824-1629-008.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483271	ncm-dbt-05	600824	500	225 29 246	+143.89 ± 12.71	0 0 64 176 10	+333.32 ± 42.66	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1935958443 \ -pgnout ncm-dbt-20260824-1629-007.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483270	ncm-dbt-02	592850	500	221 35 244	+135.76 ± 12.62	0 2 66 176 6	+315.35 ± 42.24	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1179571525 \ -pgnout ncm-dbt-20260824-1629-006.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483269	ncm-dbt-04	570669	500	235 34 231	+148.02 ± 11.65	0 1 52 192 5	+366.78 ± 47.92	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2337726478 \ -pgnout ncm-dbt-20260824-1629-005.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483268	ncm-dbt-05	610571	500	227 33 240	+142.25 ± 13.37	0 2 63 174 11	+324.17 ± 43.32	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2655233661 \ -pgnout ncm-dbt-20260824-1629-004.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483267	ncm-dbt-03	577889	500	231 33 236	+145.54 ± 12.43	0 2 55 186 7	+349.43 ± 46.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 473345573 \ -pgnout ncm-dbt-20260824-1629-003.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483266	ncm-dbt-01	585126	500	215 38 247	+128.55 ± 12.63	0 4 68 175 3	+298.62 ± 41.71	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1130272978 \ -pgnout ncm-dbt-20260824-1629-002.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
483265	ncm-dbt-02	593023	500	230 39 231	+139.81 ± 13.64	0 5 58 178 9	+321.19 ± 45.36	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 311562670 \ -pgnout ncm-dbt-20260824-1629-001.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260824-1629 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:598ae2c46500e6dc50b54919ea4bebfe213ddcd1 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15

Commit

Commit ID	598ae2c46500e6dc50b54919ea4bebfe213ddcd1
Author	Robert Nurnberg @ elitebook
Date	2026-08-24 16:29:40 UTC
Make extensions and futility pruning depend on new seekMate variable This PR simplifies the recent patch https://github.com/official-stockfish/Stockfish/pull/7040, while still allowing Stockfish to consistently pass the CI `go mate` run involving 61 positions with DTM from 1 to 4 plies. Results of a deterministic th1 run covering these 61 positions are as follows. ``` Loaded 61 FENs with 61 bm values, with \|bm\| (min avg max): 1 2 2. Matetrack started for ./sf.master on matetrack.epd matedtrack.epd with --bmMax 2 --mate 0 ... 100%\|███████████████████████████████████████████\| 61/61 [00:17<00:00, 3.54it/s] Using ./sf.master on matetrack.epd matedtrack.epd with --bmMax 2 --mate 0 Engine ID: Stockfish dev-20260819-229f6339 Total FENs: 61 Found mates: 61 Best mates: 61 Best mate statistics: \|bm\| = 1 - mates found: 21 = 100.0% of 21; nodes (min avg max): 4 343 1372, depth (min avg max): 1 4 12 \|bm\| = 2 - mates found: 40 = 100.0% of 40; nodes (min avg max): 16 402441 15454156, depth (min avg max): 1 10 24 All best mates found: 61 = 100.0% of 61; nodes (min avg max): 4 264014 15454156, depth (min avg max): 1 8 24 ``` ``` Loaded 61 FENs with 61 bm values, with \|bm\| (min avg max): 1 2 2. Matetrack started for ./sf.patch on matetrack.epd matedtrack.epd with --bmMax 2 --mate 0 ... 100%\|███████████████████████████████████████████\| 61/61 [00:02<00:00, 24.64it/s] Using ./sf.patch on matetrack.epd matedtrack.epd with --bmMax 2 --mate 0 Engine ID: Stockfish dev-20260824-1a3ceee9 Total FENs: 61 Found mates: 61 Best mates: 61 Best mate statistics: \|bm\| = 1 - mates found: 21 = 100.0% of 21; nodes (min avg max): 4 343 1372, depth (min avg max): 1 4 12 \|bm\| = 2 - mates found: 40 = 100.0% of 40; nodes (min avg max): 16 20068 255722, depth (min avg max): 1 9 21 All best mates found: 61 = 100.0% of 61; nodes (min avg max): 4 13277 255722, depth (min avg max): 1 8 21 ``` The above shows that patch outperforms master 2s:17s, and 13277:264014 nodes. In addition, patch shows a healthy increase in (best) mates found on matetrack: ``` Using ./sf.patch on matetrack.epd with --nodes 1000000 Engine ID: Stockfish dev-20260824-1a3ceee9 Total FENs: 6554 Found mates: 3700 Best mates: 2457 ``` This compares with 3202, 2263 for master, see https://github.com/vondele/matetrack/blob/c88991a2558b326e2119ca0e5cc9554d60e559ab/matetrack1000000.csv#L4530. The numbers for the classic mate suite are: ``` Loaded 280 FENs with 280 bm values, with \|bm\| (min avg max): 10 15 21. Matetrack started for ./sf.patch on classic280.epd with --nodes 1000000 ... 100%\|███████████████████████████████████████████\| 56/56 [00:26<00:00, 2.13it/s] Using ./sf.patch on classic280.epd with --nodes 1000000 Engine ID: Stockfish dev-20260824-1a3ceee9 Total FENs: 280 Found mates: 128 Best mates: 31 ``` This compares with 165, 24 for master, see https://github.com/vondele/matetrack/blob/c88991a2558b326e2119ca0e5cc9554d60e559ab/classic1000000.csv#L4530. Passed STC non-reg: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 41504 W: 10764 L: 10559 D: 20181 Ptnml(0-2): 61, 4620, 11196, 4803, 72 https://tests.stockfishchess.org/tests/view/6a85b5af9960adfadf924292 Passed LTC non-reg: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 111234 W: 28827 L: 28702 D: 53705 Ptnml(0-2): 32, 11680, 32064, 11813, 28 https://tests.stockfishchess.org/tests/view/6a86ef485b1b38ebda864e69 closes https://github.com/official-stockfish/Stockfish/pull/7089 Bench: 2502027