LAMAdoku - Sudoku, kinda

Enter a number 1-9 in each empty square by clicking in the space and typing the number. A number cannot appear twice in the same row or column. You can enter as many numbers as you like before pressing the guess button. Each time you press guess you're scored with a move. Incorrect fields will be highlighted in orange, questionable guesses in light blue. Good Luck!
Game Mode: Easy
8 7 3 1
5 4 1 7
7 9 1 8
5 7 8 2
2 4 9 7
3 6 8 7
8 1 9 2
6 3 8 4
2 8 7 3