Thermo Sudoku" is a variation of the classic Sudoku puzzle that includes an additional rule involving "thermometers." In a regular Sudoku puzzle, you must fill a 9x9 grid with digits from 1 to 9 in such a way that each row, each column, and each of the nine 3x3 subgrids (also known as "regions" or "boxes") contains all of the digits exactly once. In Thermo Sudoku, thermometers are added to the puzzle. A thermometer is a series of cells with increasing values that start from the "bulb" and continue in an upward direction. The digits in the thermometer must be consecutive and in ascending order. The rules of Thermo Sudoku are as follows: Fill the grid with digits from 1 to 9 according to regular Sudoku rules. Each thermometer must contain all the digits from 1 to 9 exactly once. Digits in a thermometer must be consecutive and in increasing order. The thermometer's bulb (starting cell) can be any cell in the grid, and the direction of the thermometer is always upward. To solve a Thermo Sudoku puzzle, you need to adhere to these rules while solving both the regular Sudoku constraints and the additional thermometer constraints. In this puzzle, the thermometers are notated as sequences of increasing numbers in certain cells. The goal is to complete the puzzle while making sure that the regular Sudoku rules and the thermometer rules are both satisfied. Remember, Thermo Sudoku adds an extra layer of complexity to the classic Sudoku puzzle, making it a bit more challenging and requiring careful consideration of the thermometer constraints in addition to the usual rules.