Daily Frog Sudoku

Daily Frog Sudoku is a classic Japanese number puzzle set in a quiet forest. Each day, a new Sudoku challenge appears with three difficulty levels to choose from. New daily puzzles keep coming, so you will not run out of brain teasers. The calm atmosphere invites unhurried play, just you and the logic puzzle. It is a nice way to wake up your brain in the morning or to unwind after work in the evening. If you watch a short ad, you can unlock any Sudoku from previous days, just click the calendar icon.

How to play?

You play on a nine-by-nine grid that is split into three-by-three blocks. Some numbers are already placed, and you have to fill in the rest. The main rule is simple: every number from 1 to 9 must appear exactly once in each row, each column, and each three-by-three block. Click an empty cell, then pick a number. If it is correct, you earn 5 points. If it is wrong, the number turns red, and those points are subtracted from your score.

Start with spots that have the fewest possible options. For instance, if a row already has eight numbers, the ninth one is easy to figure out. Keep filling in the grid step by step, using logic and the numbers you have already placed. The faster you finish without mistakes, the higher your final score will be. If you get stuck on a hard puzzle, just take a break and come back later with a fresh mind.