About this game
The main difficulty is that the player does not choose the number himself. You need to use the card that opened from the deck. This makes every move important and adds a solitaire mechanic: you can flip through the cards, flip the discard, and look for the best course of action.
The game has several difficulty levels, highlighting possible moves, canceling an action, and checking the field. The controls are simple: you can drag a card onto the field or select a card and a cell by tapping.
How to play
Click on the deck on the left to reveal the card. Then drag the open card onto the Sudoku field or select a card by clicking, and then click on the desired cell.
A card can only be placed in an empty cell if the same number is no longer found in that row, column, or 3x3 square.
If the card doesn't fit right now, open the next one. When the deck runs out, the stack of face-up cards will flip back over. The goal of the game is to fill in the entire field without violating the rules of Sudoku.