Quiz : Next Black ?

1. when you click a point on the Go board, stones are displayed on the positions.
2. You can put back your move by a right-click.
3. Although the last move is shown, click the button, "次の一手 Next move" to show the next move quiz.
4. The next move is shown by clicking a button with a right arrow.
5. The quiz is changed when you click a button, "次の一手 Next move" below the board.
6. Click the button "Auto", then automatic movement starts. Click it again, then it stops.

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