Normal sudoku rules apply. The letters A, G, H, M and N all represent different numbers (not necessarily from 1-9). Digits along an arrow sum to the digit in the attached circle. Digits in a cage sum to the given total in the top left corner. Along the blue line, each line segment within a different 3x3 box must sum to the same total. Clues outside the grid show the sum of the digits sandwiched between the 1 and 9 in that row. Digits along a thermometer increase from the bulb end.