| Function | Description | Strategic Importance |
|---|---|---|
| Place Stone | Tap any intersection or use the virtual key “Place Stone”. | Every stone changes influence, territory potential, and future tactical options. |
| Move Cursor | Use the virtual arrow keys (▲ ◀ ▶ ▼) to move the cursor on mobile. | Allows precise placement on mobile devices without mis-taps. |
| Pass Turn | The player skips their move. | Useful when no move increases influence or during endgame territory evaluation. |
| Resign | The player resigns and the opponent wins. | Strategic choice when the board position is clearly lost. |
| AI Difficulty | Select Easy, Medium, or Hard. | Higher difficulty increases AI influence analysis, capture detection, and territory bias. |
| Board Size | Choose 9×9, 13×13, or 19×19. | Larger boards dramatically increase strategic depth and long-term planning. |
| Sound Effects | Toggle sounds for placement, captures, and illegal moves. | Provides instant feedback and enhances immersion. |
| Game Mode | Switch between Human vs AI or Human vs Human. | Allows both training and competitive play. |
| Game Log | Displays moves, passes, captures, and system messages. | Essential for reviewing decisions and improving strategy. |
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Strategic Go Engine · blue-idea.net