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