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NowChess/NowChessSystems:main NowChess/NowChessSystems:feat/NCS-81 NowChess/NowChessSystems:performance NowChess/NowChessSystems:feat/NCS-66

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NowChess/NowChessSystems:main NowChess/NowChessSystems:feat/NCS-81 NowChess/NowChessSystems:performance NowChess/NowChessSystems:feat/NCS-66

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9ab1317ece .. core-0.4.0

Author	SHA1	Message	Date
lq64	919beb3b4b	feat: NCS-9 En passant implementation (#8 ) Build & Test (NowChessSystems) TeamCity build finished Details - Add EnPassantCalculator to derive the en passant target square from GameHistory, detect en passant captures, and compute the captured pawn's square - Extend MoveValidator.legalTargets to include the en passant diagonal square in pawn legal targets - Extend GameController.processMove to remove the captured pawn from the board when an en passant capture is played Details En passant is derived purely from the last HistoryMove — no new state is introduced. If the last move was a double pawn push, the target square is the square the pawn passed through. The board mutation follows the same pattern as castling: board.withMove moves the capturing pawn, then board.removed removes the captured pawn from its actual square (which differs from the destination square). Test Plan - EnPassantCalculatorTest — 14 unit tests covering target derivation, captured square calculation, and capture detection for both colors - MoveValidatorTest — 5 new tests: ep target included/excluded based on history, adjacency filter, both colors, case _ branch coverage - GameControllerTest — 2 integration tests: white and black en passant capture removes pawn from board and returns correct captured piece - 100% scoverage (line/branch/method) confirmed Co-authored-by: LQ63 <lkhermann@web.de> Reviewed-on: #8 Reviewed-by: Janis <janis-e@gmx.de> Co-authored-by: Leon Hermann <lq@blackhole.local> Co-committed-by: Leon Hermann <lq@blackhole.local>	2026-03-29 17:06:50 +02:00

Author

SHA1

Message

Date

lq64

919beb3b4b

feat: NCS-9 En passant implementation (#8 )

Build & Test (NowChessSystems) TeamCity build finished

Details

- Add EnPassantCalculator to derive the en passant target square from GameHistory, detect en passant captures, and
  compute the captured pawn's square
  - Extend MoveValidator.legalTargets to include the en passant diagonal square in pawn legal targets
  - Extend GameController.processMove to remove the captured pawn from the board when an en passant capture is played

  Details

  En passant is derived purely from the last HistoryMove — no new state is introduced. If the last move was a double
  pawn push, the target square is the square the pawn passed through. The board mutation follows the same pattern as
  castling: board.withMove moves the capturing pawn, then board.removed removes the captured pawn from its actual square
   (which differs from the destination square).

  Test Plan

  - EnPassantCalculatorTest — 14 unit tests covering target derivation, captured square calculation, and capture
  detection for both colors
  - MoveValidatorTest — 5 new tests: ep target included/excluded based on history, adjacency filter, both colors, case _
   branch coverage
  - GameControllerTest — 2 integration tests: white and black en passant capture removes pawn from board and returns
  correct captured piece
  - 100% scoverage (line/branch/method) confirmed

Co-authored-by: LQ63 <lkhermann@web.de>
Reviewed-on: #8
Reviewed-by: Janis <janis-e@gmx.de>
Co-authored-by: Leon Hermann <lq@blackhole.local>
Co-committed-by: Leon Hermann <lq@blackhole.local>

2026-03-29 17:06:50 +02:00

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