Flip Tiles
All gamesMoves 0 / 9Shortest 6Faces 15 ● · 10 ○
15 filled, 10 open. 9 moves left. Cursor on column 3, row 3: filled face, selected 0 times, even. Row 3 has 0 selections, even. Column 3 has 0 selections, even.
Selecting a tile twice undoes it, and the order never matters — so what you are looking for is a set of tiles, not a sequence. The shortest set for this board is 6.
← → ↑ ↓ move · Enter or Space selects the tile under the cursor, turning over its whole row and its whole column. All ● wins, all ○ wins. Click the board first, or press Tab to focus it.