Use all types of hints.
Solve 50 puzzles
Solve 10 puzzles
Solve 200 puzzles
Solve 500 puzzles
Solve 1500 puzzles
Solve 1000 puzzles
Solve 20 puzzles in one day.
Solve 100 puzzles in one day.
Solve 500 puzzles in one day.
Solve 200 puzzles in one day.
Solve 100 puzzles without mistake.
Solve 200 puzzles without mistake.
Solve 1500 puzzles without mistake.
Solve 500 puzzles without mistake.
Solve all puzzles on 1 level.
Solve all puzzles on 5 levels.
Solve all puzzles on 30 levels.
Solve all puzzles on 15 levels.