Houses and regions
Grids, boxes, rows, columns and extra regions (diagonals, windows, colours) in the puzzle format.
Cages and sums
Killer cages and sum rules (little killers, frames, corner and group sums) in the puzzle format.
Lines and arrows
Line rules (thermo, whisper, renban, palindrome, entropic, lockout and more) and arrows in the puzzle format.
Edges and corners
Clues between two cells (kropki, XV, difference, sum, product, ratio, greater-than) and on 2x2 blocks.
Outside clues
Clues written outside the grid: sandwich, x-sum, skyscraper, rossini and first seen.
Whole-board rules
Rules over neighbouring pairs (anti-knight, anti-king, non-consecutive), explicit pairs and the negative constraints.
Cell clues
Clues on single cells (odd, even, low, high, digit sets, exclusions) in the puzzle format.
Other rules
The remaining rule families: contains, appears, clone, count, global entropy, equal sums, vudoku.