Whisper-4rrows

**Sudoku, Whisper-4, Arrows** -Standard 9x9 sudoku: The digits 1 through 9 appear in every row, column, and box without repetition. - Whisper-4: Adjacent digits along a Whisper-4 line must differ by at least four. - Arrows: Digits along an arrow must sum to the number indicated in the circle from which the arrow emerges. Digits may repeat along arrows if allowed by other rules. 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