## In this contest it will appear classical sudoku and some Sudoku variants, all both in 6x6 and 9x9 grids. This test is based on a theme called, Renban Groups. In all Sudoku Grids, there will be several Renban Groups. Each Renban Group is a set of grey painted cells connected to each other, either orthogonally or diagonally. Each Renban Group must hold distinct consecutive digits, in any order. Renban groups may cross across 3X3 boxes / 2X3 boxes /irregular regions.

## Renban Group?

- Each Renban Group is a set of grey painted cells connected to each other, either orthogonally or diagonally. Each Renban Group must hold distinct consecutive digits, in any order. Renban groups may cross across 3X3 boxes / 2X3 boxes / irregular regions.

## Sudoku Types

- Classic Sudoku
- Shifted Sudoku
- Diagonal Sudoku
- Argyle Sudoku
- Anti-knight Sudoku
- Non-consecutive Sudoku
- Symmetric Unequal Sudoku
- Non-touching Sudoku
- Chaos Sudoku
- Diagonally Non-consecutive Sudoku

All Sudokus will have

__Renban group__constraints applied.
Each type will have one 6X6 and one 9X9 Sudoku.

## Author

- Zafer Hüseyin Ergan is a puzzle enthusiast from Turkiye. He had become a puzzle fan for about ten years. His favourite puzzle types are optimization puzzles and sudokus.

## Timing

You may start "Renban Grouped Sudokus" any time during the 48-hour period listed above.

Your timer will start when you click "Start Test" — then you will have exactly 100 minutes to solve and submit your answers. A timer will be shown the answer page with the remaining time.

Submission is not allowed after the specified end time — you must start early enough to permit yourself enough solving time. "Show cells to fill" will be activated after 40 minutes.

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