About

This is a puzzle consisting of two overlapping circular disks, reminiscent of other circle puzzles such as Turnstile and Rashkey. It actually most resembles the Cohan Circle but instead of 6-fold symmetry it has 3 fold symmetry, so it is as if you are playing on a Cohan Circle but restrict yourself to only do 120 degree turns. Each disk consists of 3 large diamond shaped pieces, and 9 small lozenge shaped pieces of which 6 form the perimeter of the disk and 3 form spokes between the diamond pieces. The two disks share a diamond and its four adjacent lozenges, so all together there are 5 diamonds and 14 lozenges. The puzzle usually has three colours. In the solved state the overlapping area is one colour, and the rest of the left disk a second colour, and the rest of the right disk a third colour. The Triplex puzzle was invented by Douglas A. Engel, who also invented various other puzzles such as: Turnstile/Puzzler Farmland Gear puzzles Battle Gear puzzles Palette 21 Palette 7 Palette Mix 4 Slide Rule Duel (Binary Bisection 5) Slide Rule Duel Pentaplenty and Heptalive Mandorla is a neat version of the puzzle was produced in Hungary in 2013. It was invented by Ferenc Molnár, who also invented the Equator / Hungarian Globe puzzle. If your browser supports JavaScript, then you can play the Mandorla/Triplex puzzle by clicking the link below: