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When on, you can mark your opponent's most recent move as a good move or a bad move during your own turn. Annotations are saved with the game and used to improve future AI training.

When on, after each AI move the game log shows how long the AI thought, the search depth it reached, how many nodes it evaluated, and its evaluation of the position (positive favors the AI; "win"/"loss" means a forced result).

When on, the game screen offers an "AI eval" readout that continuously shows the AI's evaluation of the current position (positive favors red). Costs some CPU while enabled.

When on, the game screen shows how many board nodes each side's stones are closer to (red / blue / contested, and the difference). Useful for judging who controls more of the map.

When on, the AI thinks ahead in the background while it's your turn, so its moves come back faster. Costs extra CPU — turn off on low-power devices.