add common game

src/common/CommonBoard.ts

@@ -0,0 +1,10 @@
+import { Board } from '../core/Board';
+
+const pitCountByUser = 6;
+const initialStoneCountInPit = 4;
+
+export class CommonBoard extends Board {
+  constructor() {
+    super(pitCountByUser, initialStoneCountInPit);
+  }
+}

src/common/CommonMancalaGame.ts

@@ -0,0 +1,14 @@
+import { MancalaGame } from '../core/MancalaGame';
+import { Player } from '../core/Player';
+import { CommonBoard } from './CommonBoard';
+import { GRLastStoneInBank } from './game_rules/GRLastStoneInBank';
+import { GRLastStoneInEmptyPit } from './game_rules/GRLastStoneInEmptyPit';
+
+export class CommonMancalaGame extends MancalaGame {
+  constructor(player1: Player, player2: Player) {
+    super(new CommonBoard(), player1, player2, player1.id, [
+      new GRLastStoneInEmptyPit(),
+      new GRLastStoneInBank()
+    ]);
+  }
+}