Clockwork - UCI chess Engine
Author: The Clockwork team
This is the latest version of the Clockwork engine. It is currently competing in the qualifying rounds of the TOP-64 Chess Engine League, where it scored 5.5/11 in the February 2026 edition. Although subsequent versions are getting stronger, the next edition in March 2026 is expected to be more successful.
Clockwork dev-20260320 what's new?
Template score_moves for quiet/noisy moves (#381)
Shows little to no speedups on some platforms, but never regresses.
Passed STC nonregr
```
Test | templatescoremoves
Elo | 0.27 +- 1.44 (95%)
SPRT | 8.0+0.08s Threads=1 Hash=16MB
LLR | 2.95 (-2.94, 2.94) [-3.00, 0.00]
Games | N: 58744 W: 15070 L: 15025 D: 28649
Penta | [418, 5949, 16629, 5922, 454]
https://ob.cwchess.org/test/1276/
Speedtest (eren pc):
Speedtest finished.
Total positions: 320
Total nodes: 855762944
Total time: 339055 ms
Nodes per second: 2523964
vs main:
Speedtest finished.
Total positions: 320
Total nodes: 840353792
Total time: 339057 ms
Nodes per second: 2478503
Bench: 17487016
Shows little to no speedups on some platforms, but never regresses.
Passed STC nonregr
```
Test | templatescoremoves
Elo | 0.27 +- 1.44 (95%)
SPRT | 8.0+0.08s Threads=1 Hash=16MB
LLR | 2.95 (-2.94, 2.94) [-3.00, 0.00]
Games | N: 58744 W: 15070 L: 15025 D: 28649
Penta | [418, 5949, 16629, 5922, 454]
https://ob.cwchess.org/test/1276/
Speedtest (eren pc):
Speedtest finished.
Total positions: 320
Total nodes: 855762944
Total time: 339055 ms
Nodes per second: 2523964
vs main:
Speedtest finished.
Total positions: 320
Total nodes: 840353792
Total time: 339057 ms
Nodes per second: 2478503
Bench: 17487016
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