Kyudosudoku Ad

Kyudosudoku is a website created by Timwi, one of my friends who I know through KTaNE.

It's a variant of Sudoku, where the Sudoku has no given digits, and you have to find the given digits by solving four Kyudokus.

Circled digits in each Kyudoku transfer over onto the Sudoku grid (the colour-coding helps visualise this). In basically all puzzles, you have to work between them, rather than solving the grids first, then the Sudoku.

Some puzzles also have variety constraints, which are additional clues which make the puzzle uniquely solvable. Most of these constraints are commonly used in variety Sudoku (eg. thermometers, killer cages, Renban cages), but a few were concocted by Timwi (I think a few of these include Means, Snowball, Skyscraper Sum).

A core part of Kyudosudoku is that the puzzles are timed — puzzles are displayed with an average time, calculated with the times achieved by other players. There's also a new profile system that allows you to view the puzzles other players have solved, and their times (although, it's not fully fleshed-out yet).

It's built on Zinga, a Sudoku... app... thing, created by Timwi. Give it a try! :D

(Unfinished.)