The reference for chess tactics
Every tactic, named and certified.
ChessGrammar detects, classifies, and explains every tactical motif in a position — backed by a published methodology and certification metrics you can cite.
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Sacrifices · Direct tactics · Sequence tactics · Mates · Compound checks · States
6 categories — 13 motifs — 71 variants
13
Certified motifs
71
Variants catalogued
41
Named mates
≥95%
Single-motif bar
Every verdict is proved by an adversarial judge — deterministic by construction, never scored by an engine.