Phase B.1 of the rule-variants epic. Knights are royal pieces via
the getRoyalPieces hook; kings lose their special status. Every
knight of `color` is royal, so the game only ends when the LAST
knight is mated or captured. Rules-only preset — applies to any
layout, though naturally paired with the existing `knightmate`
layout.
Test count: 1448 baseline → 1479 total (+31). The knightmate-rules
test file contributes 10 behavioral tests (a–j) covering baseline,
check detection on a royal knight, mate detection, zero-knights
degenerate semantics, king non-royalty, multi-royal check, pinned
royals, piece-hp composition, and incompatibility enforcement.
The other +21 delta comes from parallel Phase-A/B tests already
landed in the tree.
- packages/chess/src/presets/knightmate-rules.ts (new)
- packages/chess/src/presets/knightmate-rules.test.ts (new, 10 tests)
- packages/chess/src/presets/index.ts (barrel import)
- packages/chess/src/presets/presets.test.ts (count 15 → 16)
Joey Yakimowich-Payne
7b97a77ee3