Logic Masters Deutschland e.V.

Normal Sudoku

• Fill every row, column, and 3×3 box with the digits 1–9 exactly once.

Fire

• Every cell is either Burning or Safe.
• All Burning cells form one orthogonally connected region.
• All Safe cells form one orthogonally connected region.
• No 2×2 area may be entirely Burning or entirely Safe.

Burning Cells

• Burning cells only contain digits 5–9, except for the two given Burning 4s, which ignited early.
• Safe cells may contain any digit unless restricted by another rule.

Thermometers

• Digits must strictly increase from the bulb to the tip.
• On every thermometer, digits 1–4 remain Safe, while digits 5–9 are Burning.

Play in SudokuPad