The new Tentaizu Theme

We now have a special theme, for equinox, solstice, and other special astronomical events. You can activate the dedicated Tentaizu theme by adding ?theme=tentaizu to any minesweeper.org URL — or use this direct link:

minesweeper.org/?theme=tentaizu

Tentaizu (天体図) is a pure-logic deduction puzzle from Japan whose name translates to star chart or celestial atlas. Played on a compact 7×7 grid with exactly 10 hidden mines, it gives you all the number clues up front — no uncovering cells, no guessing. Every legitimate Tentaizu puzzle is solvable through pure reasoning alone, making it closer in spirit to Sudoku than to classic Minesweeper. You can play the daily Tentaizu puzzle at minesweeper.org/tentaizu.

— The Lady Di's Mines Team