| The Rules of the Game |
| IBoardModel |
| ,
bdStatusVstr) |
| IUndoMove |
| Object
execute(bdStatusVstr, param) |
| // other
methods |
| commands |
| host/visitor |
| ICheckMoveCmd |
| IBoardStatusVisitor |
| invalidMoveCase() |
| player0WonCase(…) |
| player1WonCase(…) |
| IUndoMove |
| drawCase(…) |
| noWinnerCase(…) |
| apply(…) |