PlaySudoku.us
Medium · Puzzle #244
3
6
4
5
3
1
8
2
7
5
4
8
3
2
9
2
5
3
4
1
5
7
1
2
4
6
3
3
2
1
2
9
Track your error rate, not just your time. Accuracy improves faster than speed when you measure it.
Track your error rate, not just your time. Accuracy improves faster than speed when you measure it.
"Three things cannot be long hidden: the sun, the moon, and the truth." — Buddha
"Three things cannot be long hidden: the sun, the moon, and the truth." — Buddha