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Valid Digit Combinations

You might find the following list of valid number combinations useful. It shows which digits combinations can be used to form what totals, broken down by the number of digits.
Or choose the 'Show current clue fits' option whilst playing to automatically display the relevant lines from these tables as you move around the grid in the interactive player.

PAIRS: 3: 1,2; 4: 1,3; 5: 1,4; 2,3; 6: 1,5; 2,4; 7: 1,6; 2,5; 3,4; 8: 1,7; 2,6; 3,5; 9: 1,8; 2,7; 3,6; 4,5; 10: 1,9; 2,8; 3,7; 4,6; 11: 2,9; 3,8; 4,7; 5,6; 12: 3,9; 4,8; 5,7; 13: 4,9; 5,8; 6,7; 14: 5,9; 6,8; 15: 6,9; 7,8; 16: 7,9; 17: 8,9; TRIPLETS: 6: 1,2,3; 7: 1,2,4; 8: 1,2,5; 1,3,4; 9: 1,2,6; 1,3,5; 2,3,4; 10: 1,2,7; 1,3,6; 1,4,5; 2,3,5; 11: 1,2,8; 1,3,7; 1,4,6; 2,3,6; 2,4,5; 12: 1,2,9; 1,3,8; 1,4,7; 1,5,6; 2,3,7; 2,4,6; 3,4,5; 13: 1,3,9; 1,4,8; 1,5,7; 2,3,8; 2,4,7; 2,5,6; 3,4,6; 14: 1,4,9; 1,5,8; 1,6,7; 2,3,9; 2,4,8; 2,5,7; 3,4,7; 3,5,6; 15: 1,5,9; 1,6,8; 2,4,9; 2,5,8; 2,6,7; 3,4,8; 3,5,7; 4,5,6; 16: 1,6,9; 1,7,8; 2,5,9; 2,6,8; 3,4,9; 3,5,8; 3,6,7; 4,5,7; 17: 1,7,9; 2,6,9; 2,7,8; 3,5,9; 3,6,8; 4,5,8; 4,6,7; 18: 1,8,9; 2,7,9; 3,6,9; 3,7,8; 4,5,9; 4,6,8; 5,6,7; 19: 2,8,9; 3,7,9; 4,6,9; 4,7,8; 5,6,8; 20: 3,8,9; 4,7,9; 5,6,9; 5,7,8; 21: 4,8,9; 5,7,9; 6,7,8; 22: 5,8,9; 6,7,9; 23: 6,8,9; 24: 7,8,9; QUADTUPLETS: 10: 1,2,3,4; 11: 1,2,3,5; 12: 1,2,3,6; 1,2,4,5; 13: 1,2,3,7; 1,2,4,6; 1,3,4,5; 14: 1,2,3,8; 1,2,4,7; 1,2,5,6; 1,3,4,6; 2,3,4,5; 15: 1,2,3,9; 1,2,4,8; 1,2,5,7; 1,3,4,7; 1,3,5,6; 2,3,4,6; 16: 1,2,4,9; 1,2,5,8; 1,2,6,7; 1,3,4,8; 1,3,5,7; 1,4,5,6; 2,3,4,7; 2,3,5,6; 17: 1,2,5,9; 1,2,6,8; 1,3,4,9; 1,3,5,8; 1,3,6,7; 1,4,5,7; 2,3,4,8; 2,3,5,7; 2,4,5,6; 18: 1,2,6,9; 1,2,7,8; 1,3,5,9; 1,3,6,8; 1,4,5,8; 1,4,6,7; 2,3,4,9; 2,3,5,8; 2,3,6,7; 2,4,5,7; 3,4,5,6; 19: 1,2,7,9; 1,3,6,9; 1,3,7,8; 1,4,5,9; 1,4,6,8; 1,5,6,7; 2,3,5,9; 2,3,6,8; 2,4,5,8; 2,4,6,7; 3,4,5,7; 20: 1,2,8,9; 1,3,7,9; 1,4,6,9; 1,4,7,8; 1,5,6,8; 2,3,6,9; 2,3,7,8; 2,4,5,9; 2,4,6,8; 2,5,6,7; 3,4,5,8; 3,4,6,7; 21: 1,3,8,9; 1,4,7,9; 1,5,6,9; 1,5,7,8; 2,3,7,9; 2,4,6,9; 2,4,7,8; 2,5,6,8; 3,4,5,9; 3,4,6,8; 3,5,6,7; 22: 1,4,8,9; 1,5,7,9; 1,6,7,8; 2,3,8,9; 2,4,7,9; 2,5,6,9; 2,5,7,8; 3,4,6,9; 3,4,7,8; 3,5,6,8; 4,5,6,7; 23: 1,5,8,9; 1,6,7,9; 2,4,8,9; 2,5,7,9; 2,6,7,8; 3,4,7,9; 3,5,6,9; 3,5,7,8; 4,5,6,8; 24: 1,6,8,9; 2,5,8,9; 2,6,7,9; 3,4,8,9; 3,5,7,9; 3,6,7,8; 4,5,6,9; 4,5,7,8; 25: 1,7,8,9; 2,6,8,9; 3,5,8,9; 3,6,7,9; 4,5,7,9; 4,6,7,8; 26: 2,7,8,9; 3,6,8,9; 4,5,8,9; 4,6,7,9; 5,6,7,8; 27: 3,7,8,9; 4,6,8,9; 5,6,7,9; 28: 4,7,8,9; 5,6,8,9; 29: 5,7,8,9; 30: 6,7,8,9; QUINTUPLETS: 15: 1,2,3,4,5; 16: 1,2,3,4,6; 17: 1,2,3,4,7; 1,2,3,5,6; 18: 1,2,3,4,8; 1,2,3,5,7; 1,2,4,5,6; 19: 1,2,3,4,9; 1,2,3,5,8; 1,2,3,6,7; 1,2,4,5,7; 1,3,4,5,6; 20: 1,2,3,5,9; 1,2,3,6,8; 1,2,4,5,8; 1,2,4,6,7; 1,3,4,5,7; 2,3,4,5,6; 21: 1,2,3,6,9; 1,2,3,7,8; 1,2,4,5,9; 1,2,4,6,8; 1,2,5,6,7; 1,3,4,5,8; 1,3,4,6,7; 2,3,4,5,7; 22: 1,2,3,7,9; 1,2,4,6,9; 1,2,4,7,8; 1,2,5,6,8; 1,3,4,5,9; 1,3,4,6,8; 1,3,5,6,7; 2,3,4,5,8; 2,3,4,6,7; 23: 1,2,3,8,9; 1,2,4,7,9; 1,2,5,6,9; 1,2,5,7,8; 1,3,4,6,9; 1,3,4,7,8; 1,3,5,6,8; 1,4,5,6,7; 2,3,4,5,9; 2,3,4,6,8; 2,3,5,6,7; 24: 1,2,4,8,9; 1,2,5,7,9; 1,2,6,7,8; 1,3,4,7,9; 1,3,5,6,9; 1,3,5,7,8; 1,4,5,6,8; 2,3,4,6,9; 2,3,4,7,8; 2,3,5,6,8; 2,4,5,6,7; 25: 1,2,5,8,9; 1,2,6,7,9; 1,3,4,9,8; 1,3,5,7,9; 1,3,6,7,8; 1,4,5,6,9; 1,4,5,7,8; 2,3,4,7,9; 2,3,5,6,9; 2,3,5,7,8; 2,4,5,6,8; 3,4,5,6,7; 26: 1,2,6,8,9; 1,3,5,8,9; 1,3,6,7,9; 1,4,5,7,9; 1,4,6,7,8; 2,3,4,8,9; 2,3,5,7,9; 2,3,6,7,8; 2,4,5,6,9; 2,4,5,7,8; 3,4,5,6,8; 27: 1,2,7,8,9; 1,3,6,8,9; 1,4,5,8,9; 1,4,6,7,9; 1,5,6,7,8; 2,3,5,8,9; 2,3,6,7,9; 2,4,5,7,9; 2,4,6,7,8; 3,4,5,6,9; 3,4,5,7,8; 28: 1,3,7,8,9; 1,4,6,8,9; 1,5,6,7,9; 2,3,6,8,9; 2,4,5,8,9; 2,4,6,7,9; 2,5,6,7,8; 3,4,5,7,9; 3,4,6,7,8; 29: 1,4,7,8,9; 1,5,6,8,9; 2,3,7,8,9; 2,4,6,8,9; 2,5,6,7,9; 3,4,5,8,9; 3,4,6,7,9; 3,5,6,7,8; 30: 1,5,7,8,9; 2,4,7,8,9; 2,5,6,8,9; 3,4,6,8,9; 3,5,6,7,9; 4,5,6,7,8; 31: 1,6,7,8,9; 2,5,7,8,9; 3,4,7,8,9; 3,5,6,8,9; 4,5,6,7,9; 32: 2,6,7,8,9; 3,5,7,8,9; 4,5,6,8,9; 33: 3,6,7,8,9; 4,5,7,8,9; 34: 4,6,7,8,9; 35: 5,6,7,8,9; SEXTUPLETS: 21: 1,2,3,4,5,6; 22: 1,2,3,4,5,7; 23: 1,2,3,4,5,8; 1,2,3,4,6,7; 24: 1,2,3,4,5,9; 1,2,3,4,6,8; 1,2,3,5,6,7; 25: 1,2,3,4,6,9; 1,2,3,4,7,8; 1,2,3,5,6,8; 1,2,4,5,6,7; 26: 1,2,3,4,7,9; 1,2,3,5,6,9; 1,2,3,5,7,8; 1,2,4,5,6,8; 1,3,4,5,6,7; 27: 1,2,3,4,8,9; 1,2,3,5,7,9; 1,2,3,6,7,8; 1,2,4,5,6,9; 1,2,4,5,7,8; 1,3,4,5,6,8; 2,3,4,5,6,7; 28: 1,2,3,5,8,9; 1,2,3,6,7,9; 1,2,4,5,7,9; 1,2,4,6,7,8; 1,3,4,5,6,9; 1,3,4,5,7,8; 2,3,4,5,6,8; 29: 1,2,3,6,8,9; 1,2,4,5,8,9; 1,2,4,6,7,9; 1,2,5,6,7,8; 1,3,4,5,7,9; 1,3,4,6,7,8; 2,3,4,5,6,9; 2,3,4,5,7,8; 30: 1,2,3,7,8,9; 1,2,4,6,8,9; 1,2,5,6,7,9; 1,3,4,5,8,9; 1,3,4,6,7,9; 1,3,5,6,7,8; 2,3,4,5,7,9; 2,3,4,6,7,8; 31: 1,2,4,7,8,9; 1,2,5,6,8,9; 1,3,4,6,8,9; 1,3,5,6,7,9; 1,4,5,6,7,8; 2,3,4,5,8,9; 2,3,4,6,7,9; 2,3,5,6,7,8; 32: 1,2,5,7,8,9; 1,3,4,7,8,9; 1,3,5,6,8,9; 1,4,5,6,7,9; 2,3,4,6,8,9; 2,3,5,6,7,9; 2,4,5,6,7,8; 33: 1,2,6,7,8,9; 1,3,5,7,8,9; 1,4,5,6,8,9; 2,3,4,7,8,9; 2,3,5,6,8,9; 2,4,5,6,7,9; 3,4,5,6,7,8; 34: 1,3,6,7,8,9; 1,4,5,7,8,9; 2,3,5,7,8,9; 2,4,5,6,8,9; 3,4,5,6,7,9; 35: 1,4,6,7,8,9; 2,3,6,7,8,9; 2,4,5,7,8,9; 3,4,5,6,8,9; 36: 1,5,6,7,8,9; 2,4,6,7,8,9; 3,4,5,7,8,9; 37: 2,5,6,7,8,9; 3,4,6,7,8,9; 38: 3,5,6,7,8,9; 39: 4,5,6,7,8,9;