Cylinder Minesweeper — Custom

What is Cylinder Minesweeper?

Cylinder Minesweeper is a twist on classic Minesweeper where the board is wrapped horizontally — the left edge connects directly to the right edge, forming a cylinder. Every cell still follows the standard rules: numbered clues count all adjacent mines, but cells on the left or right border treat the opposite edge as their neighbor.

The result is a seamless, edge-free playing field along the horizontal axis. There are no dead corners on the sides — the board curves around, opening up new logical chains that don't exist on a flat grid.

How to Play

• Left-click a cell to reveal it. If it's empty (0), all connected empty cells auto-expand.
• Right-click to place a flag (🚩) on a suspected mine. Right-click again for a question mark (❓), then once more to clear.
• Double-click a revealed number to chord — if the correct number of flags are placed around it, all remaining neighbors are revealed at once.
• The 😊 button starts a fresh game. Your timer begins on your first click.
• Remember: left and right edges connect. A cell in the leftmost column neighbors the rightmost column, and vice versa.

Difficulty Levels

• Easy — 9×9 board, 10 mines. Ideal for learning how the horizontal wrap affects adjacent cells.
• Medium — 16×16 board, 40 mines. The wrap becomes a meaningful factor in deduction chains.
• Hard — 16×30 board, 99 mines. High mine density with wrapping neighbors makes every number count.
• Custom — Set your own rows, columns, and mine count for a personalized challenge.

Strategy Tips

• Watch the edges. A number in column 0 or the last column has neighbors on both sides of the board. Don't treat edge cells as having fewer neighbors — they have the same eight as any interior cell.
• Use the wrap to your advantage. A constraint on the right edge and one on the left edge may share hidden cells through the wrap, enabling subset deductions you'd never see on a flat board.
• No Guess mode generates boards that are always logically solvable — no coin-flip situations. Enable it for a pure logic challenge.
• Chord efficiently. Once you've flagged all mines around a number, double-click to reveal the rest in one move and keep your 3BV/s high.
• Open in the middle. Your first click is always safe. Clicking near the center maximizes the chance of a large auto-expand cascade.

Cylinder vs. Other Variants

• Classic Minesweeper — flat grid, hard edges on all four sides.
• Cylinder — left and right edges connect; top and bottom remain fixed borders.
• Toroid Minesweeper — all four edges connect (left↔right and top↔bottom), forming a donut shape with no borders at all.