About RacecarToo

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

RacecarToo is a free daily color palindrome sudoku from Mind Loft. Each day gives you a 9×9 sudoku with lines drawn across the grid, and every line reads the same forwards and backwards: its two end squares hold the same color, the next two in hold the same color, and so on to the middle. Rows, columns, and 3×3 boxes still hold all nine colors exactly once, and the lines plus a handful of printed colors carry the rest.

Each line ties squares together in pairs, so a color found at one end is found at the other, and a candidate ruled out in one square of a pair is gone from both. Two paired squares can never share a row, column or box. Every board has a single solution you can always reach by logic, with no guessing. 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 24 on Monday down to 16 on Saturday, and the Sunday Edition prints just fourteen under ten lines. No app, no signup, play free in your browser. Want the rest of the family? Try Cages, the killer sudoku, Sando, the sandwich sudoku, and Mercury, the thermo sudoku.