Explanation
Open the explanation (shows the answer)
The answer is f8. With best play to the end: ±0 (a draw).
Best line: f8 g2 d7 f1 d8 c7 g1 h6 h5 h7
Other moves
| Move | Result | Why |
|---|---|---|
| g2 | -4 (a loss by 4) | The opponent's best answer is d7 (then f8 f1 g1). |
| d8 | -10 (a loss by 10) | Opponent's moves: 10 after this move, 8 after f8. The opponent's best answer is c8 (then g2 d7 b8). |
| b8 | -18 (a loss by 18) | Opponent's moves: 11 after this move, 8 after f8. The opponent's best answer is f1 (then f8 c8 d8). |
| d7 | -30 (a loss by 30) | The opponent's best answer is f1 (then g1 g2 b8). |
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.