General chess puzzle
Puzzle #1 Easy (Dễ)
Puzzle #2 Easy (Dễ)
Puzzle #3 Normal (Bình thường)
Puzzle #4 Normal (Bình thường)
Puzzle #5 Normal (Bình thường)
Puzzle #6 Normal (Bình thường)
Puzzle #7 Difficult (Khó)
Puzzle #8 Difficult (Khó)
Puzzle #9 Difficult (Khó)
Puzzle #10 Super difficult (Siêu khó)