chess.php is a CLI program that displays chess games.
It receives players' moves as arguments and prints the board state
with figure positions after those moves.
Example:
php chess.php e2-e4 e7-e5
Validation:
Currently chess.php does nothing to verify chess rules in those moves.
And you don't need to implement each rule for the game.
Add only the validations required by the tasks below.
Task 1: modify the program so that it throws an exception when player move order is wrong (e.g. if whites make two moves in a row).
To verify your solution, run tests:
$ ./vendor/bin/phpunit --group=rotation
Task 2: modify the program so that it throws an exception when a pawn makes an illegal move.
To verify your solution, run tests:
$ ./vendor/bin/phpunit --group=pawn
Tests only move pawns, other figures are not moved, so you are safe to ignore non-pawn specifics in your solution.
- A pawn can move forward (vertically) by 1 square;
- The first time a pawn moves, it may move forward by 2 squares instead of 1;
- Pawns cannot jump over other figures;
- Pawns can capture enemy figures only by diagonally moving 1 square forward;
- En passant capture also exists, but don't bother about it :)