Technique guides
156 techniques across 8 games, each with a worked example board and a step-by-step walkthrough. These are the same guides the app links to from its hints.
Sudoku
From naked singles to alternating inference chains — every technique the 9x9 board asks for.
45 techniquesKakuro
Sum combinations, run intersections, and the arithmetic that narrows a white run to one digit.
17 techniquesHitori
Shading rules, connectivity traps, and the patterns that force a duplicate to stay.
11 techniquesBridges
Island counts, forced spans, and the isolation arguments that rule a connection out.
7 techniquesNurikabe
Island reach, sea connectivity, and the pool rule that decides most cells for you.
18 techniquesSlitherlink
Corner parity, loop reachability, and the edge deductions that grow a single closed loop.
25 techniquesBattleship
Fleet counting, forced extensions, and the diagonal rule that turns a hit into water.
12 techniquesSkyscrapers
Visibility clues, height permutations, and the cross-line consistency that settles a row.
21 techniques