Explanation
Open the explanation (shows the answer)
The answer is h2. With best play to the end: ±0 (a draw).
Best line: h2 g5 g3 f1 g6 h5 g1 h1 g2 h7
Other moves
| Move | Result | Why |
|---|---|---|
| g5 | -8 (a loss by 8) | The opponent's best answer is h5 (then h6 g6 d1). |
| h5 | -10 (a loss by 10) | The opponent's best answer is h6 (then g5 g6 d1). |
| d1 | -16 (a loss by 16) | The opponent's best answer is h5 (then g5 g3 f1). |
About these puzzles
Each position comes from a real game. The engine solved it to the end (perfect play by both sides) and only positions with a single best move, clearly better than the second-best move, were kept. "Best play wins by N" is the final disc margin when both sides play perfectly.
If you play a different move, you see the final margin your move leads to with perfect play afterwards, and how much it gave up. Results are stored only in this browser.
To be graded during a full game, go to the Reversi dojo.