Each row, column and marked region must contain 1-8. Clues outside the grid show the sums between the X and the Y in that row/column, where X and Y are consistent digits to be discovered. Digits increase along thermometers from the bulb.
Each row, column and marked region must contain 1-8. Clues outside the grid show the sums between the X and the Y in that row/column, where X and Y are consistent digits to be discovered. Digits increase along thermometers from the bulb.