Separate the six (brass and plastic) rods. Charles Perry is a renowned architect and sculptor, with a handful of puzzle designs to his credit.Buyer is responsible for shipping and paypal fees

This puzzle of 6 pieces assembles to make a nice icosahedron.Includes stand. Note the chips on the two corners (one small, one slightly bigger), which does not affect the functionality of the puzzle...Buyer is responsible for shipping and paypal fees

This is a two laying puzzle. You have to put the 7 pieces back into the package.

On the front and on the back there are numbers. You have to put the pieces in such place that each row and column has the same sum. Also in the main diagonals. IPP exchange puzzle

Unhappy Childhood is Stewart Coffin's design #41. Ten checkered pieces, each made of five cubic blocks joined different ways, pack into a 5x5x2 square box. This is one of the first puzzles that I made in the early 1990s.

Kevin Holmes' exchange puzzle for IPP25 in Helsinki...Arrange the ten shapes that spell the letters/numbers IPP 25 SUOMIto form a 4x4x4 cube. Rated difficult, this puzzle has a unique solution...Buyer is responsible for shipping and paypal fees

Double-Bar Cube, designed by Tom Jolly, manufactured by Bernhard Schweitzer, exchange puzzle for IPP 2008. Made from "3 hardwoods". Nice fit, no defects. 6 identical pieces, not as easy as it appears, but not terribly difficult either.

Split Ribs Cube, designed by Marc Van Kreveld, manufactured by Bernhard Schweitzer. No defects but for the original roughness of the wood used. Eight pieces, not interlocking (it falls apart if you pick it up).

This is a 25 piece puzzle, I believe designed by Jon Constantin, each piece consisting of 4 wooden cubies with a brass rod sticking out of the side. All the pieces are identical, and pack into the cubic open-topped box. It's a Bits and Pieces copy of Constantin's puzzle, and comes with some poorly made instructions and the original box.

This edge-matching puzzle is a premium from a company called DSM Gist. From The Netherlands. Date unknown, but within the last decade or so. 7 hexagonal cardboard pieces, each with 6 images on them, form a 6-piece circle with the 7th piece in the middle; all the edges have to match.Size = approx. 3" x 3" Payment: Payment can be made by Paypal or by check in U.S. dollars, or by Paypal in euro, or by euro through direct transfer of funds into my German bank account at the equivalent of US $1 = 0,8...

Place the 12 pieces in the correct locations so the shape of the holes (circle, cross, and square) match. Size = approx. 4.5" x 6.5" Payment: Payment can be made by Paypal or by check in U.S. dollars, or by Paypal in euro, or by euro through direct transfer of funds into my German bank account at the equivalent of US $1 = 0,80 euro.Important Shipping Note: I will be preparing for and attending the Essen Spieletage (German game fair) immediately after the auction ends. I can bring your items won ...

You have to put the black piece also inside the tray. Was my exchange puzzle in Prague.

There are 8 square cards and 1 start and 1 goal cards. The 8 square cards have pictures on the front and on the back side.You have to arrange the cards in such way that there is a way from start to goal. If you have make your path it should be also possible to pick up the 4 keys which are on the path. The puzzle is from 1995

Was the exchange puzzle by Theo Geerinck at the IPP 25 in Helsinki

Very challenging burr... 40 moves to remove the first piece...Buyer is responsible for shipping and paypal fees

here's Stewart Coffin's challenge of this puzzle:An interesting puzzle is suggested by joining 1 x 2 x 2 blocks in pairs all possible ways. The resulting 10 pieces are shown in Fig. 60. They can be assembled into a 4 x 4 x 5 solid, and there are said to be 25 solutions. Now eliminate the two pieces that are themselves rectangular, and see if the remaining eight (shaded) will assemble into a 4 x 4 x 4 cube. After you have become convinced that they will not, find a set that will by duplicati...

The object of the puzzle is to disassemble the thirty pieces and reassemble into this attractive collection of stellated rhombic dodecahedrons. This puzzle was conceived whilst making the Diagonal Twins exchange puzzle for IPP25. Brian just kept extending pieces to see where it would lead.tThere are 288 saw cuts in this puzzle. Each piece is cut from a single piece of wood. No glue is used in the puzzle. The very fine tolerances of each saw cut are the secret to it fitting together ...

This was my IPP design competition entry in 2006. It was my tribute to Nob Yoshigahara. I so love his Unhappy Adolescence puzzle based on the P pentomino+ 2x1x1 block, that I thought I would try a U pentomino +2x1x1 block and see what I could come up with. What I found was that 9 pieces plus a single cube would make a nice 4x4x4 puzzle. The puzzle consists of 4 pieces plus their mirror images and a self reflective piece plus the lone cube. Several problems can be dreamed up and attempted. T...

Stewart Coffin's Patio Block puzzle made of various hardwoods. This puzzle has 8 pieces that assemble to form a cube. Each piece is made up of two 2x2x1 square blocks joined together. There are 7 unique pieces. This puzzle has a lacquer finish applied. Taken from my personal collection. No box is provided with this set.Stewart made only a four of this puzzle in 1988, but it was later made by Brian Young for an IPP22 exchange puzzle.If buyer chooses to pay by PayPal, the PayPal fees will be a...

All the 25 circle pieces has to put back in the circle tray. The circle pieces has different sizes and the puzzle is very very difficult to solve.