only spot for a digithidden pair (while scanning that digit)hidden triple (while scanning that digit)hidden quad (while scanning that digit)bivalue: two candidates (scan narrows to cells with N)chain: forced truechain: assumed falseauto-candidatesscan: holds Nscan: N is a candidatescan: N can gotap again: row/colhighlight: holds digithighlight: has all selectedhighlight: has some, not all
Load a puzzle manually
Paste 81 characters, left-to-right, top-to-bottom. Use 0 or . for empty cells. Whitespace and newlines are ignored.