RULES: Classic Sudoku rules apply. Additionally, there are some thermometer shapes in the grid. Digits along the thermometers never decrease from the bulb to the flat end.
RULES: Place a digit from 1 to 9 in each empty cell so that no digit repeats in any row, column or bold region. Some rows & columns bend as indicated by following the grey lines.
RULES: Classic Sudoku rules apply. A dot at a corner implies that one digit is the sum of the remaining three digits at the corner. Not all dots are given.
RULES: Classic sudoku rules apply. Additionally, the numbers with arrows outside the grid indicate the sum of the digits appearing in the cells in the corresponding direction. Digits may repeat in the direction of the arrow. Also, clues outside the grid represent the sum of the first three digits in the corresponding row or column.