Thunderbird

**Sudoku, Modular Lines, Cages, Kropki Pairs** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Modular lines: Any set of three adjacent digits along a modular line has three different remainders when divided by 3. - Cages: Digits in cages cannot repeat and must sum to the value shown in the upper left corner of the cage. - Kropki pairs: Digits in cells separated by a black dot are in a 2:1 ratio. Digits in cells separated by a white dot are consecutive. Not all dots are necessarily given. Subscribe to our mailing list to receive a weekly email with all of our puzzles from the past week: https://missingdeck.net/mailing.html