Explanation
Open the explanation (shows the answer)
The answer is f2. With best play to the end: ±0 (a draw).
Best line: f2 f1 g1 b7 a8 g2 b1 b2 a1 pass
Other moves
| Move | Result | Why |
|---|---|---|
| g2 | -12 (a loss by 12) | g2 is an X-square (diagonal to the corner h1). While the corner is empty it tends to give the corner away. After this move the opponent can play the corner h1. Opponent's moves: 6 after this move, 4 after f2. The opponent's best answer is h2 (then b1 g1 h1). |
| b1 | -14 (a loss by 14) | The opponent's best answer is f1 (then g1 f2 b7). |
| b7 | -16 (a loss by 16) | b7 is an X-square (diagonal to the corner a8). While the corner is empty it tends to give the corner away. After this move the opponent can play the corner a8. The opponent's best answer is a8 (then f2 g1 g2). |
| b2 | -22 (a loss by 22) | b2 is an X-square (diagonal to the corner a1). While the corner is empty it tends to give the corner away. After this move the opponent can play the corner a1. The opponent's best answer is a1 (then b1 f1 b7). |
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.