The Delta puzzle is formed by joining three separate pieces that mesh with each other. It is designed by the brain-child native of Hong Kong Kyoo Wong who, with the eye of an engineer, has worked on a number of cast puzzles. While this puzzle is simple in form, its geometry somehow challenges and stirs up our creativity. The theme is the number three.

Hanayama is known worldwide for challenging puzzles and quality manufacturing. Can you take the pieces apart, then put them back together again? Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 3 puzzles are considered moderately challenging by most puzzlers.