Source Authorship Forensics · CCRL 40/40
The engine this site is about, and #19 on the CCRL 40/40 list this survey is drawn from.
Chess System Tal is the strongest engine in this survey with a lineage stretching back to the 1990s Complete Chess System — decades of human chess-programming heritage from Chris Whittington, developed with Ed Schröder of Rebel fame. It sits at #19 on the CCRL 40/40 list this whole survey is drawn from.
It is, by design, not a Stockfish clone: a modern NNUE engine tuned for a bold, sacrificial, attacking style in the spirit of Mikhail Tal — knowledge and character over pure convergence on the top-engine recipe.
Confidence: Absolute — a decades-long, openly-authored human project.
Included for completeness — it is #19 in the list — and because it is the home team.
| Where it resembles Stockfish |
|---|
| Modern NNUE evaluation; bitboard search |
| The standard strong-engine search techniques |
| Competitively rated in the CCRL top 20 |
| Where it is its own |
|---|
| A 1990s heritage (Complete Chess System) long predating NNUE |
| A deliberately attacking, “romantic” playing style |
| Its own network and evaluation character |
| Moderate, not close, Stockfish similarity |
Chess System Tal is a human-written, expert engine with one of the longest pedigrees in the field — and the reason this site exists. In a CCRL top 50 that has largely converged on the Stockfish recipe, it keeps a distinctive attacking character of its own. Unmistakably human; happily not a clone.