About KnightToo

A 9x9 puzzle, and the color twin of Knight: the same rules, colors in place of digits. The two never play the same board on the same day.

KnightToo is a free daily color anti-knight sudoku from Mind Loft. Each day gives you a 9×9 grid with one rule added to the usual three: no color may repeat a chess knight's move away from itself, two squares one way and one square across. Rows, columns, and 3×3 boxes still hold all nine colors exactly once, and that fourth constraint does so much of the work that the board can print far fewer colors than an ordinary sudoku needs.

There is no arithmetic and nothing extra drawn on the grid: the whole twist is a shape you already know from chess, and selecting a square rings the eight squares its knights reach so you never have to picture the L. Every board has a single solution you can always reach by logic, with no guessing, and on every board the knight rule is load-bearing rather than decorative: read as an ordinary sudoku, the same clues would fit more than one grid. Wrong entries are never flagged, so spotting your own slips is part of the puzzle, and a clean solve scores a perfect 10 with the daily leaderboard decided on the clock.

A new board drops every day at midnight Eastern; weekdays print fewer colors as the week goes on, from 28 on Monday down to 16 on Saturday, and the Sunday Edition prints thirteen. No app, no signup, play free in your browser. Want the rest of the family? Try Suds, the classic 9×9, Cages, the killer sudoku, Mercury, the thermo, and Polka, the kropki with no colors at all.