Normal sudoku rules apply. Along thermometer shapes, digits must increase from the bulb end. Clues outside the grid give the sum of the cells "sandwiched" between the 1 and 9 in the relevant row/column.
Normal sudoku rules apply. Along thermometer shapes, digits must increase from the bulb end. Clues outside the grid give the sum of the cells "sandwiched" between the 1 and 9 in the relevant row/column.