Clockwork dev-20260408 - new version chess engine (Windows and Linux)

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-20260408 what's new?

Evaluate attack and defense status of king flanks (#387)

Passed STC:

```

Test  | flankattdef

Elo   | 18.10 +- 6.18 (95%)

SPRT  | 8.0+0.08s Threads=1 Hash=16MB

LLR   | 3.08 (-2.94, 2.94) [0.00, 3.00]

Games | N: 4266 W: 1242 L: 1020 D: 2004

Penta | [36, 455, 973, 589, 80]

```

https://ob.cwchess.org/test/1323/

Passed LTC:

```

Test  | flankattdef

Elo   | 17.48 +- 5.89 (95%)

SPRT  | 40.0+0.40s Threads=1 Hash=64MB

LLR   | 3.01 (-2.94, 2.94) [0.00, 3.00]

Games | N: 3918 W: 1125 L: 928 D: 1865

Penta | [10, 408, 958, 541, 42]

```

https://ob.cwchess.org/test/1324/

Bench: 18377860

Clockwork dev-20260408 download

To deliver high-precision engine comparisons, my hardware runs 24/7. This project relies on the support of the chess community to stay sustainable. If you appreciate the "under the hood" work I do here, a small PayPal donation goes a long way in keeping the servers humming and the data flowing.