Eiffel Six Cube Puzzle

Sorry folks I didn't post last week due to work commitments. This weeks puzzle was designed by Alistair Morris of the UK.

http://mechanical-puzzles.com/cube-puzzle/

Currency R&R

Currency R&R, "modded" by Frans De Vreugd for his IPP37 Exchange Puzzle. Nice but very challenging packing puzzle with five different challenges.

The original design, Currency R&S came from Rex Perez and Stanislav Knot. 

http://mechanical-puzzles.com/currency-rr/

This is an example of just one of several solutions for one of the three anti slide challenges

Concentric Arc

You would have probably guessed that this is another Robrecht Louage design. The Concentric Arc, exchanged by David Pullen at IPP37 in Paris last year.

http://mechanical-puzzles.com/concentric-arc/

Gridlock at the Arc De Triomphe

Anti slide puzzle designed by Brian Young, Junichi Yananose and William Hu. Difficult and I still have not found the solution to it...

http://mechanical-puzzles.com/anti-slide-puzzle/