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r/sudoku • … • u/Alarming_Pair_5575

A tough but good one

Saw this puzzle earlier (posted by u/gerito) and went for it. Probably the highest rated puzzle I've solved without forcing chains, using AICs and ALS AICs (some grouped) only.

Generally speaking, is there a rating tipping point where forcing chains become necessary? Also curious about other solve paths.

https://sudoku.coach/en/play/700900063000620800000700200007000009010000050040080000500090020100560004420001000

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