Samurai Sudoku
Samurai Sudoku joins five 9×9 grids through four overlapping 3×3 boxes. Every row, column and box in each grid needs digits 1 through 9 exactly once. An entry in a shared box must satisfy both grids, so deductions in an outer grid can help the central one.
Controls
Click or tap selects; enter digits with the keyboard or pad. Arrow keys traverse active cells; N toggles notes; Delete, Backspace or 0 clears. Z undoes; H reveals a square; + and − controls adjust board zoom
Solve five connected grids
Samurai Sudoku joins five 9×9 grids through four overlapping 3×3 boxes. Every row, column and box in each grid needs digits 1 through 9 exactly once. An entry in a shared box must satisfy both grids, so deductions in an outer grid can help the central one.
Navigate the large board
Select a cell, then use the number buttons or keyboard. Notes keep candidate values, Erase clears an editable entry and Undo restores a previous step. The native Hint fills an unresolved cell and marks the run as assisted. Zoom changes the board scale; use the board scroll area where the complete grid cannot fit.
Classic and daily puzzles
Choose Easy, Medium or Hard, or start the dated daily challenge. This build uses a finite puzzle bank and transformations, so layouts can repeat. Continue restores unfinished progress saved on this browser. Completed dates and personal times are local; there are no invented online rankings or synchronized accounts.