Artigos
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Killer Sudoku
Play Killer Sudoku online free. Cage sum puzzle with four difficulty levels, daily challenge, notes, hints, undo, timer and stats.
Sandwich Sudoku
Play Sandwich Sudoku free online. Standard Sudoku rules plus outside clues: each number gives the sum of the digits strictly between the 1 and…
Anti-Knight Sudoku
Play Anti-Knight Sudoku free online. Standard Sudoku plus the knight-move rule: no two cells a knight's move apart (an L-shape of 2+1 squares, like…
Arrow Sudoku
Play Arrow Sudoku free online. Solve 27 sum-path puzzles where each circled digit equals the sum of the digits along its arrow. Beginner to…
Thermo Sudoku
Play Thermo Sudoku free online. Solve 30 hand-crafted thermo puzzles where digits rise along each thermometer. Beginner to Master tiers.
Greater-Than Sudoku
Play Greater-Than Sudoku free online. Standard Sudoku plus greater-than and less-than signs between adjacent cells: the open jaw of each sign points toward the…
Outside Sudoku
Play Outside Sudoku free online. Standard Sudoku plus outside clues that tell you which digits appear in the border cells of each row and…
Jigsaw Sudoku
Play Jigsaw Sudoku free online. Instead of 3x3 boxes, the grid is divided into 9 irregularly-shaped jigsaw regions. Each row, column, and region must…
Samurai Sudoku
Free online Samurai Sudoku puzzle game with 5 overlapping 9x9 grids. 27 puzzles across 6 difficulty tiers from Beginner to Master.
Knotwords
Crossword-sudoku hybrid word logic puzzle. Deduce letters from bundles to form valid words.