Normal sudoku rules apply. A number in a circle gives how many times that number appears in circles (anywhere in the puzzle). A clue outside the grid gives the sum of the first X digits from that direction where X is the digit next to the clue.
Normal sudoku rules apply. A number in a circle gives how many times that number appears in circles (anywhere in the puzzle). A clue outside the grid gives the sum of the first X digits from that direction where X is the digit next to the clue.