packages/core/src/history/MoveHistory.ts

@@ -64,14 +64,11 @@ export function describeMove(moves: PlayedMove[], moveNumber: number): MoveDescr
     };
 }
 
-// Board indexes the stones of the given pit are dropped into, in order, as Board.move sows them: a single stone goes
-// to the next pit; otherwise the first stone goes back into the played pit. Every pit and store is passed, the
-// opponent's store too. The last index is where the last stone lands. Empty for an empty pit or a store.
+// Board indexes the stones of the given pit are dropped into, in order, as Board.move sows them (see
+// Board.getSowingPath): the opponent's store is skipped. The last index is where the last stone lands. Empty for an
+// empty pit or a store.
 export function getSowingPath(stones: number[], pitIndex: number): number[] {
-    const stoneCount = stones[pitIndex];
-    if (!stoneCount || referenceBoard.checkPitTypeIsBankByIndex(pitIndex)) return [];
-    const start = stoneCount === 1 ? pitIndex + 1 : pitIndex;
-    return Array.from({ length: stoneCount }, (_, step) => (start + step) % stones.length);
+    return referenceBoard.getSowingPath(pitIndex, stones[pitIndex] ?? 0);
 }
 
 // The game as it was after the given move, for showing or animating that position (e.g. with PitAnimator,

packages/core/tests/history/MoveHistory.test.ts

@@ -145,12 +145,12 @@ describe("getSowingPath", () => {
         expect(getSowingPath(stones, 4)).toEqual([5]);
     });
 
-    it("passes both stores and wraps around the board", () => {
+    it("passes the player's own store, skips the opponent's and wraps around the board", () => {
         const stones = getInitialBoard();
         stones[12] = 4;
         expect(getSowingPath(stones, 12)).toEqual([12, 13, 0, 1]);
         stones[5] = 10;
-        expect(getSowingPath(stones, 5)).toEqual([5, 6, 7, 8, 9, 10, 11, 12, 13, 0]);
+        expect(getSowingPath(stones, 5)).toEqual([5, 6, 7, 8, 9, 10, 11, 12, 0, 1]);
     });
 
     it("is empty for an empty pit or a store", () => {

packages/mancala.js/src/core/Board.ts

@@ -107,19 +107,34 @@ export class Board {
         `StoneNotFound => index : ${index} stoneCount = ${pit.stoneCount}`
       );
     }
-    const stepCount = pit.stoneCount;
-    this.pits[index].stoneCount = 0;
-    const startIndex = stepCount === 1 ? index + 1 : index;
-    this.moveInternal(startIndex, stepCount);
+    const path = this.getSowingPath(index);
+    pit.stoneCount = 0;
+    this.fireOnGameMoveStart(path[0]);
+    path.forEach((pathIndex) => this.onGameMoveStep(pathIndex));
+    this.fireOnGameMoveEnd(path[path.length - 1]);
   }
 
-  private moveInternal(startIndex: number, stepCount: number) {
-    this.fireOnGameMoveStart(startIndex);
-    for (let i = startIndex; i < startIndex + stepCount; i++) {
-      this.onGameMoveStep(i);
+  // Indexes the stones of the pit are dropped into, in order. A single stone goes to the next pit; otherwise the first
+  // stone goes back into the played pit. The player's own bank gets a stone, the opponent's bank is skipped. The last
+  // index is where the last stone lands. Empty for a bank or an empty pit.
+  public getSowingPath(
+    index: number,
+    stoneCount = this.pits[index].stoneCount
+  ): number[] {
+    this.checkIndeAndMaybeThrowError(index);
+    if (stoneCount <= 0 || this.checkPitTypeIsBankByIndex(index)) return [];
+    const opponentBankIndex =
+      this.getPitTypeByIndex(index) === 'player1Pit'
+        ? this.player2BankIndex()
+        : this.player1BankIndex();
+    const path: number[] = [];
+    let current =
+      stoneCount === 1 ? this.getNextPitIndexCircularly(index) : index;
+    while (path.length < stoneCount) {
+      if (current !== opponentBankIndex) path.push(current);
+      current = this.getNextPitIndexCircularly(current);
     }
-    const stopIndex = startIndex + stepCount - 1;
-    this.fireOnGameMoveEnd(stopIndex);
+    return path;
   }
 
   public onGameMoveStep(index: number) {

packages/mancala.js/tests/Board.test.ts

@@ -103,9 +103,33 @@ describe('Board Test', () => {
     expect(board.getStoneArray()).toStrictEqual(initialBoard);
     board.move(5);
     expect(board.getStoneArray()).toStrictEqual([
-      5, 5, 5, 5, 5, 2, 1, 5, 5, 5, 5, 5, 5, 1
+      5, 5, 5, 5, 5, 2, 2, 5, 5, 5, 5, 5, 5, 0
     ]);
   });
+  test('move skips the opponent bank for both players', () => {
+    const board = new Board(6, 4);
+    board.pits[12].stoneCount = 10;
+    board.move(12);
+    expect(board.getStoneArray()).toStrictEqual([
+      5, 5, 5, 5, 5, 5, 0, 5, 5, 4, 4, 4, 1, 1
+    ]);
+  });
+  test('test getSowingPath', () => {
+    const board = new Board(6, 4);
+    expect(board.getSowingPath(0)).toStrictEqual([0, 1, 2, 3]);
+    expect(board.getSowingPath(0, 1)).toStrictEqual([1]);
+    expect(board.getSowingPath(5, 2)).toStrictEqual([5, 6]);
+    expect(board.getSowingPath(5, 9)).toStrictEqual([
+      5, 6, 7, 8, 9, 10, 11, 12, 0
+    ]);
+    expect(board.getSowingPath(12, 3)).toStrictEqual([12, 13, 0]);
+    expect(board.getSowingPath(11, 10)).toStrictEqual([
+      11, 12, 13, 0, 1, 2, 3, 4, 5, 7
+    ]);
+    expect(board.getSowingPath(0, 0)).toStrictEqual([]);
+    expect(board.getSowingPath(6)).toStrictEqual([]);
+    expect(board.getSowingPath(13)).toStrictEqual([]);
+  });
 
   test('test getOppositePitIndex', () => {
     const board = new Board(6, 4);

packages/mancala.js/tests/game_rules/GRDoubleStoneInPit.test.ts

@@ -33,7 +33,7 @@ describe('GRDoubleStoneInPit Test', () => {
     expect(game.history[game.history.length - 1].gameSteps).toStrictEqual([
       new GameStep(12, GAME_STEP_GAME_MOVE),
       new GameStep(13, GAME_STEP_GAME_MOVE),
-      new GameStep(14, GAME_STEP_GAME_MOVE),
+      new GameStep(0, GAME_STEP_GAME_MOVE),
       new GameStep(0, GAME_STEP_DOUBLE_STONE_IN_PIT, {
         pitIndex: 0,
         bankIndex: 13