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feat: NCS-11 50-move rule (#9)
NowChess released this
2026-04-01 10:36:24 +02:00 | 319 commits to main since this releaseSummary
- Implements the FIDE 50-move draw rule: a player may claim a draw if no pawn move or capture has occurred in the last
50 full moves (100 half-moves) - Draw is not automatic — the eligible player must claim it via a TUI menu shown at the start of their turn
- halfMoveClock: Int is threaded through processMove and gameLoop; resets on pawn move, capture, or en passant;
increments on all other moves
Changes
- GameController.scala: extended MoveResult.Moved and MoveResult.MovedInCheck with newHalfMoveClock: Int; added
MoveResult.DrawClaimed; added halfMoveClock parameter to processMove and gameLoop; TUI menu shown when clock ≥ 100 - Main.scala: initial gameLoop call passes halfMoveClock = 0
- GameControllerTest.scala: updated all existing pattern matches; added 10 new tests covering clock reset, clock
increment, draw claim, and TUI menu behaviour
Test plan
- processMove: 'draw' with halfMoveClock = 100 → DrawClaimed
- processMove: 'draw' with halfMoveClock = 99 → InvalidFormat
- Pawn move / capture / en passant → clock resets to 0
- Quiet piece move → clock increments by 1
- MovedInCheck carries updated clock
- TUI menu appears when clock ≥ 100; option 1 claims draw, option 2 continues
- No TUI menu when clock < 100
- All 197 tests passing
Co-authored-by: LQ63 lkhermann@web.de
Reviewed-on: #9
Co-authored-by: Leon Hermann lq@blackhole.local
Co-committed-by: Leon Hermann lq@blackhole.localDownloads
- Implements the FIDE 50-move draw rule: a player may claim a draw if no pawn move or capture has occurred in the last