Samurai Sudoku is a larger Sudoku puzzle made from five connected 9x9 grids. Four outer grids overlap with one central grid, creating shared 3x3 regions where every number must work in two grids at the same time.
This makes Samurai Sudoku different from classic Sudoku. You are not solving one board in isolation. A number placed in an overlap zone can affect two puzzles, so each move needs careful checking across the connected grids.
Samurai Sudoku is sometimes called Gattai-5, because it combines five Sudoku grids into one larger puzzle. Each grid follows the normal Sudoku rules, but the overlapping areas connect the boards together.
The main challenge is multi-grid logic. A digit that looks correct in one grid may create a problem in another. Good Samurai Sudoku solving means watching both the local grid and the shared regions.
Classic Sudoku focuses on one 9x9 grid. Samurai Sudoku expands the challenge by connecting five grids together. The basic rules are familiar, but the solving path is wider and more demanding.
The overlap zones are the heart of Samurai Sudoku. These shared 3x3 regions connect the central grid with the outer grids. When you place a number there, it must be valid in both grids.
For example, if an overlap cell belongs to the top-left grid and the central grid, the digit must not repeat in either grid's row, column, or 3x3 box. This is why solving Samurai Sudoku requires more attention than a single-grid puzzle.
Each difficulty level should teach a different part of Samurai Sudoku. Start with the level that matches your current skill.
Samurai Sudoku is a good choice if you already enjoy classic Sudoku and want a larger puzzle with more connected logic. Beginners can start with the easy level, while experienced players can move toward hard, expert, and master puzzles.
If the five-grid layout feels too large at first, practice normal Sudoku or try Medium Samurai Sudoku after learning the overlap zones on the easy level.
It can be harder because you solve five connected grids instead of one. The rules are familiar, but the overlap zones add more logic to track.
Gattai-5 refers to the five-grid structure used in Samurai Sudoku. Four outer grids connect with one central grid through shared 3x3 regions.
Not always. Start where the clues are strongest, but check the central grid often because it connects the four outer boards.
Easy and medium puzzles can often be solved with basic logic and notes. Harder Samurai Sudoku levels may require stronger candidate tracking and advanced patterns.
Samurai Sudoku is perfect for players who want a bigger and more connected puzzle. Study the overlap zones, move carefully between grids, and solve the five boards as one complete logic challenge.