Do you like to play Sudoku game with classic rules, test your mind for strength, resolving easy and difficult number puzzles? We invite you to spend your free time playing Sudoku Boost - complete the adventure mode, participate in themed events, daily challenges and elaborate your skills. And, of course, to use boosters making your sudoku classic number games more fun! Enjoy!Sudoku Boost: Classic Games features:• More than 20,000 pre-installed sudoku games. Classic rules.• The maximum mistakes in one sudoku level is 3.• Ranking Sudoku players from around the world.• Classic sudoku number game + the ability to play game against clock.• Adventure mode with an almost endless number of levels.• 5 difficulty games levels - Very Easy, Easy, Medium, Hard and Legendary.• Boosters that increase your pleasure of classic sudoku games.• Offline mode. Play offline in the plane, subway, and other classic places.• Assembling a jigsaw puzzle from pieces as an additional opportunity for completing the goals of the day.Options you can use in Sudoku: Classic Number Games:• Track statistics for the best and worst sudoku games.• Save received awards and achievements.• Autosave at the moment when you exit the game. Come back to the latest number puzzle anytime.• Add notes to cells, clean cells, undo the last action.• Enable / disable sound effects.• Play on your phone and tablet.Boosters:1. "Hint" - opens a random number on field.2. "Open number" - opens a specific number in the selected cell on field.3. "Freeze time" - freezes time for 60 seconds. Classic booster.4. "Open all X numbers" - opens all numbers in all cells that you have selected. If you selected 2, then all 2 on the field are opened. A very powerful booster, can help with passing sudoku puzzle level against the clock.5. "Reward for winning x5" - increases the reward for completing the puzzle game by 5 times. Used regardless of whether you won or not.6. "Unlimited mistakes" - makes it possible to mistake an unlimited number of times and win for sure. A very powerful booster for Legendary difficulty levels.Classic controls - undo the last action, eraser, and notes in cells. Ability to hide already placed (used throughout the field) numbers. Lots of free sudoku classic games for you every day.Complete levels in Sudoku: Classic Number Games, earn coins and buy boosters with them!Brief, classic rules of our sudoku game:The area for playing is a classic 9x9 square, divided into smaller squares, 3x3 cells each.1. Select cell in which you want to place a number.2. Under playing area select the number you want to place in the cell.You have to fill all empty cells with numbers from 1 to 9, so that in each row, in each column and in each small 3x3 square, each number would appear only 1 time.In our free game, we did not add other variations. Only classic games and free solutions. Offline adventure mode.Sudoku has only 1 solution!