RULES : Classic Sudoku rules apply. Additionally, there are some thermometer shapes in the grid. The numbers are in increasing order from the bulb to the flat end on each thermometer. Additionally, there are some arrow shapes in the grid. The sum of the digits along the path of each arrow must equal the digit in the circled cell. Digits may repeat along an arrow.
RULES : Classic Sudoku rule applies. There are three grey lines in the grid. One line follows Renban Sudoku rules; one line follows Palindrome Sudoku rules; one line follows German Whispers Sudoku rules. It is for the solver to determine the characteristics of each line. The white and black dots are kropki dots. Converse rule does not apply.
RULES : Classic Sudoku rules apply. Additionally , there are some cages in the grid. The number on the top left corner of each cage is equal to the sum of the digits in that cage. Digits do not repeat inside a cage.
RULES : Classic Sudoku rules apply. Additionally, there are some grey cells in the grid. Digits in the grey cells are larger than all orthogonally ( horizontally & vertically ) adjacent white cells.
RULES : Apply Classic Sudoku rules to each of the 9x9 grid. Note that multiple grids are overlapping.
RULES : Classic Sudoku rules apply. Cells containing grey circles contain only odd digits. Cells containing grey squares contain only even digits.
RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box. Onl...
