Information Trickle

**Sudoku, Outside Clues, Quadruples** - Standard 9x9 sudoku: The digits 1 through 9 appear in every row, column, and box without repetition. - Outside Clues: Digits outside the grid must appear in one of the first three cells of the row or column from the position of the clue. - Quadruples: Digits in a quadruples circle must appear at least once in the four cells surrounding the circle. For more of our puzzles, please visit https://missingdeck.net or join our mailing list to get a weekly digest of puzzles: missingdeck.net/mailing