Dev Builds » 20260101-1513

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	03:18:31	581280	1970	859 197 914	+121.47 ± 6.46	0 15 307 649 14	+274.14 ± 19.38
ncm-dbt-02	03:18:17	586720	1954	820 174 960	+119.35 ± 6.53	0 22 295 652 8	+271.19 ± 19.84
ncm-dbt-03	03:18:14	585995	1986	854 205 927	+117.86 ± 6.52	1 21 307 656 8	+267.28 ± 19.44
ncm-dbt-04	03:18:31	564775	1968	835 181 952	+120.01 ± 6.38	0 16 307 652 9	+272.69 ± 19.39
ncm-dbt-05	03:18:04	585866	1966	833 199 934	+116.19 ± 6.62	0 25 308 641 9	+260.96 ± 19.42
			9844	4201 956 4687	+118.97 ± 2.91	1 99 1524 3250 48	+269.21 ± 8.7

Test Detail

ID	Host	Base NPS	Games	WLD	Standard Elo	Ptnml(0-2)	Gamepair Elo	PGN
448223	ncm-dbt-02	586477	454	189 42 223	+116.69 ± 13.81	0 5 73 146 3	+260.12 ± 40.12
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 331969043 \ -pgnout ncm-dbt-20260101-1513-020.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448222	ncm-dbt-04	566888	468	195 35 238	+123.76 ± 12.18	0 1 73 159 1	+287.73 ± 39.75
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2581437960 \ -pgnout ncm-dbt-20260101-1513-019.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448221	ncm-dbt-05	580987	466	206 47 213	+123.49 ± 12.87	0 3 70 158 2	+284.1 ± 40.93
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3528321784 \ -pgnout ncm-dbt-20260101-1513-018.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448220	ncm-dbt-01	582527	470	205 52 213	+117.37 ± 14.27	0 6 76 147 6	+255.03 ± 39.34
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 759177268 \ -pgnout ncm-dbt-20260101-1513-017.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448219	ncm-dbt-03	587282	486	211 55 220	+115.61 ± 13.25	0 5 80 155 3	+257.38 ± 38.24
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2280816064 \ -pgnout ncm-dbt-20260101-1513-016.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448218	ncm-dbt-02	586350	500	207 45 248	+116.77 ± 13.36	0 8 74 166 2	+263.42 ± 39.97	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2867401644 \ -pgnout ncm-dbt-20260101-1513-015.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448217	ncm-dbt-05	584579	500	215 50 235	+119.11 ± 12.24	0 3 80 166 1	+273.0 ± 38.12	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2345820613 \ -pgnout ncm-dbt-20260101-1513-014.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448216	ncm-dbt-01	579289	500	222 44 234	+129.35 ± 12.01	0 2 70 176 2	+304.07 ± 40.91	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3756952419 \ -pgnout ncm-dbt-20260101-1513-013.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448215	ncm-dbt-04	564997	500	200 50 250	+107.54 ± 13.23	0 7 88 153 2	+236.51 ± 36.44	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1491871720 \ -pgnout ncm-dbt-20260101-1513-012.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448214	ncm-dbt-03	584201	500	213 54 233	+114.45 ± 12.67	0 4 85 159 2	+256.44 ± 36.95	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 230323559 \ -pgnout ncm-dbt-20260101-1513-011.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448213	ncm-dbt-02	586858	500	205 44 251	+116.0 ± 12.84	0 5 81 162 2	+261.07 ± 38.02	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4167740837 \ -pgnout ncm-dbt-20260101-1513-010.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448212	ncm-dbt-04	564370	500	222 52 226	+123.02 ± 13.11	0 5 74 167 4	+277.93 ± 39.92	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2753805506 \ -pgnout ncm-dbt-20260101-1513-009.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448211	ncm-dbt-05	579992	500	193 52 255	+100.7 ± 14.16	0 11 91 144 4	+213.85 ± 35.9	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1900962113 \ -pgnout ncm-dbt-20260101-1513-008.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448210	ncm-dbt-01	582402	500	212 53 235	+114.45 ± 12.49	0 2 90 155 3	+254.16 ± 35.58	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1421662142 \ -pgnout ncm-dbt-20260101-1513-007.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448209	ncm-dbt-03	584790	500	216 47 237	+122.24 ± 12.57	1 1 78 168 2	+282.94 ± 38.55	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 102790195 \ -pgnout ncm-dbt-20260101-1513-006.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448208	ncm-dbt-03	587707	500	214 49 237	+119.11 ± 13.69	0 11 64 174 1	+273.0 ± 42.83	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2336780934 \ -pgnout ncm-dbt-20260101-1513-005.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448207	ncm-dbt-02	587197	500	219 43 238	+127.76 ± 12.26	0 4 67 178 1	+301.33 ± 42.04	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1618513382 \ -pgnout ncm-dbt-20260101-1513-004.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448206	ncm-dbt-04	562846	500	218 44 238	+126.17 ± 12.3	0 3 72 173 2	+293.29 ± 40.39	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2219580204 \ -pgnout ncm-dbt-20260101-1513-003.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448205	ncm-dbt-01	580904	500	220 48 232	+124.6 ± 12.9	0 5 71 171 3	+285.49 ± 40.81	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3171402021 \ -pgnout ncm-dbt-20260101-1513-002.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
448204	ncm-dbt-05	597907	500	219 50 231	+122.24 ± 13.3	0 8 67 173 2	+280.42 ± 42.05	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3666608289 \ -pgnout ncm-dbt-20260101-1513-001.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=20260101-1513 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:8815d1ef02038e5f60b974b2d24c380bbd6ba4d8 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15

Commit

Commit ID	8815d1ef02038e5f60b974b2d24c380bbd6ba4d8
Author	mstembera
Date	2026-01-01 15:13:44 UTC
Minor cleanup in full_threats.cpp closes https://github.com/official-stockfish/Stockfish/pull/6509 No functional change