Која је најбоља стратегија да се започне Killer Sudoku?

Пре свега другог, скенирајте сваки кавез за forced combinations - Они с само једним могућим скупом цифара. Означите кандидате за свако поље у таквим кавезима одмах. Кључни за памћење: 2-пољни кавези од 3 ({1,2}) и 17 ({8,9}); 3-пољни кавези од 6 ({1,2,3}) и 24 ({7,8,9}).

Work systematically through all 9 boxes, then all 9 rows, then all 9 columns. For each unit, add up cage sums entirely within it and subtract from 45. If the result reveals a single-cell innie or outie, place it immediately. Even two-cell results with a known sum restrict candidates significantly.

This step often produces the largest burst of free information at the start of medium and harder puzzles.

Погледајте где cages overlap with rows, columns, and boxes. Ако све cells од cage леже унутар single row (или column), cage's digits морају се појавити у том row и могу се уклонити као candidates из rest од тог row outside the cage. Ово је equivalent to pointing pair technique у classic Sudoku, applied to cage digit sets.

Once the Killer-specific techniques are exhausted, continue as a standard Sudoku with partial pencil marks. Apply naked and hidden singles, naked pairs, and (on harder puzzles) X-Wing and beyond. The boundary between Killer-specific and standard techniques blurs naturally as you gain experience.

On Easy difficulty, steps 1 and 2 alone typically solve the puzzle or reduce it to a series of naked singles. Обично можете skip pencil marks entirely за Easy ако пажљиво follow the first two steps.