Seismic

You’re given a grid that has been divided into areas. Fill each empty cell with a number so each area of size N contains one instance of each number between 1 and N. Depending on the game mode, the following rule is added:

Seismic mode is an implementation of Hakyuu, a puzzle invented by Nikoli. It’s also known as Ripple Effect. More information: http://www.janko.at/Raetsel/Hakyuu/index.htm

The inventor of Tectonic is unknown.

Controls

Seismic uses the same control scheme as Solo, but the interface automatically enforces the maximum number on each area, so it’s not possible to enter numbers that are out of range.

Left-click to select a cell, then type a number on your keyboard to enter it. Press Backspace or Space to clear a cell.

Right-click a cell, then type a number to add a pencil mark. Pencil marks can be used for any purpose. A preference makes right-click switch on a sticky pencil mode instead, which stays on until you right-click again.

You can also use the arrow keys to move the selected cell around. Press Enter to toggle between entering numbers and entering pencil marks.

Press the ‘M’ key to fill every empty cell with all possible pencil marks.

Seismic parameters

These parameters are available from the ‘Custom…’ option on the ‘Type’ menu.

Width, Height
Size of the grid in squares. The limit depends on the mode: Tectonic goes up to 100 squares, Seismic up to 64. Seismic's keep-apart rule gets harder to satisfy the larger the board, so past that size a puzzle may never be found at all. Large boards can take several seconds to generate, which is why the ready-made types in the ‘Type’ menu stop at 8×8.
Difficulty
Determine the difficulty of the generated puzzle. Higher difficulties require more complex reasoning.
Game mode
Switch between Seismic and Tectonic mode.

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