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Key Trap Interlocking puzzle by Christoph Lohe Assemble the various pieces into the lock shape shown in the cover photo. The key is looped around the shackle so that they are permanently bound together, but can move freely against each…
Looking Glass Tray-packing puzzle by Stewart Coffin (STC #184-A) Pack six pieces into an obstructed tray. Looking Glass is one of many tray-packing puzzles by Stewart Coffin. It's somewhat unusual in that the pieces enter through a slit…
Sliproad Interlocking puzzle by László Molnár Assemble six pieces into a 4x4x4 cube shape. Sliproad is one of a series of Turning Interlocking Cubes ("TICs") by the endlessly creative László Molnár. Its pieces are all made from adjoined…
Four Fit Tray-packing puzzle by Stewart Coffin (STC #217) Fit all four pieces into the rectangular opening. Four Fit is an absolute classic, and is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first,…
Wedlock Interlocking puzzle by László Molnár Assemble six pieces into a 4x4x4 cube shape. Wedlock is one of a series of Turning Interlocking Cubes ("TICs") by the endlessly creative László Molnár. Its pieces are all made from adjoined…
NOS Burr Series Interlocking puzzles by Gregory Benedetti The NOS Burr Series is a set of seven highly unusual interlocking puzzles by Gregory Benedetti. The goal of each puzzle is the same: assemble six pieces into the familiar shape of…
Roughhouse Interlocking puzzle by László Molnár Assemble six pieces into a 4x4x4 cube shape. Roughhouse is one of a series of Turning Interlocking Cubes ("TICs") by the endlessly creative László Molnár. Its pieces are all made from…
Cruiser Tray-packing puzzle by Stewart Coffin (STC #167) Fit all four pieces into the rectangular opening. Cruiser is one of a series of tray-packing puzzles by Stewart Coffin. (The other puzzles in the series can be found on the Stewart…
Victor Interlocking puzzle by Stewart Coffin (STC #201) Assemble the six pieces into the polyhedral shape shown in the photo. Victor is a polyhedral puzzle descended from earlier Coffin designs such as Star of David , Rosebud , and…
Starter Burr Set The Starter Burr Set is a puzzle set that enables you to make dozens of six-piece burr puzzles. Six-piece burrs are one of the oldest mechanical puzzle forms, dating to at least the 18th century, and it's easy to see why…
Slot Machine Packing puzzle by Stewart Coffin (STC #185) Pack seven pieces into an obstructed 3x3x3 box. Slot Machine looks like an innocent little packing puzzle, but it is far more challenging than it appears! The pieces must be…
Board Burr Bundle The Board Burr Bundle is a puzzle set that enables you to make dozens of board burr puzzles. The goal looks simple, and it's always the same: assemble six puzzle pieces - two in each of three colors - into the…
Half Cut Packing puzzle by László Molnár Pack six oddly-shaped pieces into a 3x3x3 box, so that no gaps are visible at the box top (see photo). Half Cut is an intriguing take on the well-worn genre of 3x3x3 packing puzzles. It's…
Pieces-of-Eight Assembly puzzle by Stewart Coffin (STC #77) Assemble the eight pieces to form a 2x2x2 cube or one of several other shapes. This is a fun and creative design whose pieces are based on an unusual dissection of the cube.…
Half-Hour Assembly puzzle by Stewart Coffin (STC #29) Assemble the six pieces to form a 3x3x3 cube. This seems like a straightforward puzzle, but it's harder than it looks! Coffin called this puzzle "Half-Hour" because it can reasonably…
Three-Piece Block Assembly puzzle by Stewart Coffin (STC #38) Assemble the three pieces into the pyramid shape shown in the photo. Three-Piece Block is one of Coffin's most recognizable designs. It's surprisingly difficult despite having…
Quintet in F Tray-packing puzzle by Stewart Coffin (STC #253) Fit all five pieces into the parallelogram-shaped opening. Quintet in F is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it…
Liliput Interlocking puzzle by Christoph Lohe Insert two pieces into the rectangular frame so that they are completely contained, as shown in the cover photo. Liliput is a diminutive puzzle with just a few pieces - but don't be fooled!…
Five Fit Tray-packing puzzle by Stewart Coffin (STC #177-A) Fit all five pieces into the square opening. Five Woods is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't... if it seems…
Coffin's Quartet Interlocking puzzle by Stewart Coffin (STC #93) Assemble the four pieces into a 3x3x3 cube. This is a neat little design that makes a great introduction to Stewart Coffin's interlocking puzzles. As a puzzle, it's not too…
puzzlecad is hosted on github. To download the latest version of puzzlecad, please visit the github releases page at: https://github.com/aaron-siegel/puzzlecad/releases UPDATED 4/14/22: Released puzzlecad 2.3. See the Puzzlecad Updates…
Cuckoo Nest Interlocking puzzle by Stewart Coffin (STC #21) Assemble the seven pieces into the interlocking nest shape shown in the photo. This classic puzzle is Coffin's first design involving interlocking hexagonal sticks and dowels.…
Penta-Pentomino Tray-packing puzzle by Stewart Coffin (STC #176-A) Fit all five pieces into the square opening. Penta-Pentomino is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't... if…
Dudd / Missing Notches Interlocking puzzles by Stewart Coffin (STC #129 / 129-A) Dudd and Missing Notches are two closely related puzzles by Stewart Coffin. Both have the same objective: assemble six burr pieces into the configuration…
Star of David Interlocking puzzle by Stewart Coffin (STC #37) Assemble the six pieces into each of three symmetric polyhedral shapes. (One of the images shows Coffin's illustration of the three solution assemblies.) Star of David follows…
Four Sleazy Pieces Tray-packing puzzle by Stewart Coffin (STC #169-A) Fit all four pieces into the rectangular opening. Four Sleazy Pieces is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it…
Cube-16 Interlocking puzzle by Stewart Coffin (STC #205) Assemble the five pieces into a 4x4x4 cube. This is an interlocking puzzle based on the same ideas as Coffin's earlier Patio Block . In Coffin's words: "It represents a conversion…
Locked Nest Interlocking puzzle by Stewart Coffin (STC #22) Assemble the 18 or 20 pieces (depending on variant - see below) into the interlocking shape shown in the photo. Locked Nest is Stewart Coffin's second design involving…
Decoy Tray-packing puzzle by Stewart Coffin (STC #187-A) Pack six pieces into an obstructed tray. Decoy is a tray-packing puzzle that looks simple, yet is anything but. You will need to find some tricky movements in order to get all the…
Castle / Vanishing Trunk Tray-packing puzzle by Stewart Coffin (STC #181-A & #181-B) Several puzzles in one: fit all five pieces into each of the three openings. Two of the openings are house-shaped but with an extra protrusion, either at…
Moira's Cube Interlocking puzzle by Alfons Eyckmans Disassemble the interlocking cube. Moira's Cube is one of several cube puzzles by Alfons Eyckmans in the style of his earlier Arne's Cube . Like its predecessors, Moira's Cube is for…
Knotty 6 Interlocking puzzle by Yavuz Demirhan Assemble six identical pieces into the symmetric shape shown in the cover photo. Knotty 6 is a lovely, elegant design. Six pieces all have the same flat, simple shape, yet they interlock in a…
Arne's Cube Interlocking puzzle by Alfons Eyckmans Disassemble the interlocking cube. Arne's Cube is a fascinating design. At its core is an ordinary nine-piece burr with sticks of length 8. This would make Arne's Cube a fairly…
Five-Piece Solid Block Assembly puzzle by Stewart Coffin (STC #78-C) Assemble the five pieces into a 3x3x3 cube. Five-Piece Solid Block is among Coffin's more obscure 3x3x3 cube assembly puzzles. It can be viewed as intermediate between…
Basket Case Tray-packing puzzle by Stewart Coffin (STC #227) Fit all five pieces into the trapezoid-shaped opening. Basket Case is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't... if…
Fourteen Steps Tray-packing puzzle by Stewart Coffin (STC #187-B) Pack six pieces into an obstructed tray. Fourteen Steps is one of many tray-packing puzzles by Stewart Coffin. This one is mainly for Coffin completists; it's a fun puzzle,…
No Holes Barred Packing puzzle by László Molnár Pack five pieces into a box with an unusual obstruction. No Holes Barred is one of a series of challenging packing puzzles by László Molnár. It's perhaps the easiest of the series - four of…
Manneken Packing puzzle by Yavuz Demirhan Pack six identical pieces into a rectangular box with an obstructed opening. When the puzzle is properly solved, the pieces will fit entirely within the box and will not protrude through the…
Kamelle Box Packing puzzle by Christoph Lohe Pack three pieces into a rectangular box with an obstructed opening. Kamelle Box is a fun design with a simple goal: maneuver all three pieces into the box. But the opening is small, and you…
Triagonal Agony Packing puzzle by László Molnár Pack six pieces into a box with two curiously shaped triangular openings. Triagonal Agony is one of a series of challenging packing puzzles by László Molnár. This one is quite hard. You have…
L-I-Vator II Packing puzzle by László Molnár Pack six pieces into an obstructed box. L-I-Vator II is one of a series of challenging packing puzzles by László Molnár. This one is of intermediate difficulty by the standards of Molnár's…
Convolution Interlocking puzzle by Stewart Coffin (STC #30) Assemble the seven pieces into a 4x4x4 cube. This is one of Stewart Coffin's classic designs. It was a pioneering 4x4x4 interlocking cube - a puzzle genre that has become…
The Outcast Tray-packing puzzle by Stewart Coffin (STC #225) Fit all six pieces into the parallelogram-shaped opening. The Outcast is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't...…
Patio Block Interlocking puzzle by Stewart Coffin (STC #82) Assemble the eight pieces into a 4x4x4 cube. Patio Block is classic Stewart Coffin: a simple, elegant idea gives rise to an unexpectedly challenging assembly puzzle. Coffin wrote…
BDSM Packing puzzle by László Molnár Pack six pieces into a box with two curiously shaped triangular openings. BDSM is one of a series of challenging packing puzzles by László Molnár. This one is quite hard. You have been warned! If you…
House Party Tray-packing puzzle by Stewart Coffin (STC #250) Fit all four pieces into each of the two house-shaped openings. They look similar, but the solutions are quite different! One of the openings seems much larger than the other,…
Christmas 2001 Tray-packing puzzle by Stewart Coffin (STC #182) Fit all five pieces into the rectangular opening. Christmas 2001 is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't...…
Ortho-Cube Interlocking puzzle by Stewart Coffin (STC #1) Assemble the twelve pieces into a 5x5x5 cube with holes on its faces, as shown in the cover photo. This is Stewart Coffin's first published design: STC #1. But don't be fooled!…
Window Pain Tray-packing puzzle by Stewart Coffin (STC #186) Window Pain is several puzzles in one! Each challenge involves packing the same six pieces into an obstructed tray, but with a different set of constraints. I particularly like…
Out-Back Tray-packing puzzle by Stewart Coffin (STC #222) Fit all five pieces into the rectangular opening. Out-Back is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't... if it seems…
Octet in F Tray-packing puzzle by Stewart Coffin (STC #258) Fit all eight pieces into the parallelogram-shaped opening. Octet in F is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first, but it isn't...…
Involute Interlocking puzzle by Stewart Coffin (STC #214) Assemble the eight pieces into a 4x4x4 cube. Involute is the third and final entry in Stewart Coffin's classic trilogy of interlocking cube puzzles. It is a refinement of his…
Square Knot / Plus 2 Interlocking puzzles by Stewart Coffin (STC #9 & #57) Assemble 12 or 14 identical pieces into the interlocking configurations shown in the photos. The 12-piece version, published by Coffin as Square Knot (STC #9), is…
Rectangle Block Interlocking puzzle by Christoph Lohe Remove the four pieces from the rectangular frame. Rectangle Block is a challenging Level 29 burr puzzle in an unusual frame. This one is for experienced puzzle solvers! It is intended…
Housing Project Tray-packing puzzle by Stewart Coffin (STC #181-C) Two puzzles in one: it all five pieces into each of the two house-shaped openings. They look similar, but the solutions are quite different! Housing Project is one of a…
L-I-Vator I Packing puzzle by László Molnár Pack six pieces into an obstructed box. L-I-Vator I is one of a series of challenging packing puzzles by László Molnár. This one is of intermediate difficulty by the standards of Molnár's…
Multi-Grain Burr Assembly puzzle by Stewart Coffin (STC #275-A) Assemble the four pieces into the unusual shape shown in the photo. Multi-Grain Burr is surprisingly difficult despite having only four pieces, due to the unusual shape of…
Anke's Cube Interlocking puzzle by Alfons Eyckmans Disassemble the interlocking cube. Anke's Cube has a similar structure to Eyckmans's earlier Arne's Cube , but with an even higher-level solution. Like its predecessor, Anke's Cube is for…
Extensible Burr Set NOTE: This downloads for this model are a bit of a mess, since Printables does not permit zip files to be made available for download. Until I get things sorted out, it might be easier to download from thingiverse:…
Superstar / Third Stellation Interlocking puzzle by Stewart Coffin (STC #50) Assemble the six pieces into the polyhedral shape shown in the cover photo. If properly assembled with colors aligned as shown, Superstar creates the appearance…
Corsage Interlocking puzzle by Christoph Lohe Assemble six interlocking pieces into an unusual frame. Corsage is a lovely and unusual interlocking design by Christoph Lohe. With a Level 19 solution, it is a challenging, but still…
Involution Interlocking puzzle by Stewart Coffin (STC #198) Assemble the seven pieces into a 4x4x4 cube. Involution is the second of Stewart Coffin's classic trilogy of interlocking cube puzzles. According to Coffin, it is "a slightly…
Lean-2 Tray-packing puzzle by Stewart Coffin (STC #255) Two puzzles in one: fit all four pieces into each of the two trapezoidal openings. Lean-2 is one of a series of tray-packing puzzles by Stewart Coffin. It seems impossible at first,…
Basket Burr Interlocking puzzle by Yavuz Demirhan Assemble four interlocking pieces into a basket-shaped frame. The assembled shape of Basket Burr appears to be an ordinary six-piece burr sitting freely in a tray. But two of the "pieces"…
Pillars of Hercules Assembly puzzle by Stewart Coffin (STC #78) Assemble the seven pieces into a 3x3x3 cube. Pillars of Hercules is one of Coffin's lesser-known designs. It's an unusual twist on the venerable 3x3x3 cube assembly puzzle,…
Bandido Interlocking puzzle by Yavuz Demirhan Assemble six interlocking pieces in an unusual configuration around a cube-shaped central block, as shown in the photo. With a very manageable Level 8.6 solution and only one false assembly,…
Gargamel Interlocking puzzle by Alfons Eyckmans Disassemble the eight-piece interlocking cube. Gargamel is an intricate and challenging puzzle, requiring 77 total moves to completely disassemble. It's a wonderful design with some…
Triumph Interlocking puzzle by Stewart Coffin (STC #15) Triumph is a clever design by Stewart Coffin: six pieces in three mirror-image pairs assemble in various ways to form interesting polyhedral structures. In Coffin's words: "Wouldn’t…
Augmented Four Corners Interlocking puzzle by Stewart Coffin (STC #34) Assemble the six pieces into the polyhedral shape shown in the photo. Augmented Four Corners is a variation on Coffin's earlier design Four Corners . It has a similar…
Sixticks Interlocking puzzle by Stewart Coffin (STC #268) Assemble six pieces into the interlocking configuration shown in the cover photo. Sixticks is one of many variants that Coffin explored on the classic Altekruse Puzzle . Whereas…
Aracna Interlocking puzzle by Alfons Eyckmans Disassemble the 13-piece interlocking shape to remove the spider-shaped piece trapped inside. Aracna is one of Alfons Eyckmans's popular "Burr Zoo" puzzles, in which ordinary-looking burr…
Nova Interlocking puzzle by Stewart Coffin (STC #8) Assemble the six pieces into the polyhedral shape shown in the cover photo. Nova is derived from Coffin's earlier design Sirius by adding additional ornamentation. The essential puzzle…
Snake Pit Packing puzzle by Yavuz Demirhan Pack eight pieces into a rectangular box with an obstructed opening. When the puzzle is properly solved, the pieces will fit entirely within the box and will not protrude through the opening.…
Star of David Improved Interlocking puzzle by Stewart Coffin (STC #37-A) Assemble the six pieces into each of four symmetric polyhedral shapes. One of the images shows Coffin's illustration of three of the four solution assemblies (the…
Cubic Octahedron Interlocking puzzle by Christoph Lohe Assemble the four pieces into the unusual octahedral shape shown in the photo. Cubic Octahedron is a successor of sorts to Stewart Coffin's iconic puzzles Three-Piece Block and…
Save the Gorilla Interlocking puzzle by Alfons Eyckmans Disassemble the 19-piece interlocking shape to remove the gorilla-shaped piece trapped inside. Save the Gorilla is one of Alfons Eyckmans's popular "Burr Zoo" puzzles, in which…
Convolution's Cousin Interlocking puzzle by Stewart Coffin Assemble the five pieces into a 4x4x4 cube. Convolution's Cousin is named for its similarity to Coffin's iconic Convolution puzzle. Perhaps "Convolution's forgotten stepcousin"…
Mushkila 2 Packing puzzle by Yavuz Demirhan Pack six pieces into a rectangular box with an obstructed opening. When the puzzle is properly solved, the pieces will fit entirely within the box and will not protrude through the opening. This…
Design No. 78-A Assembly puzzle by Stewart Coffin (STC #78-A) Assemble the six pieces into a 3x3x3 cube. Design No. 78-A is a sort of sequel to Coffin's related design Pillars of Hercules . Like Pillars of Hercules , it is based on an…
Sirius Interlocking puzzle by Stewart Coffin (STC #4) Sirius is the first and simplest puzzle in a long line of related designs by Stewart Coffin. It consists of six interlocking pieces, each identical in shape but with various color…
Rhinoceros Interlocking puzzle by Alfons Eyckmans Disassemble the 13-piece interlocking shape to remove the rhinoceros-shaped piece trapped inside. Rhinoceros is one of Alfons Eyckmans's popular "Burr Zoo" puzzles, in which…
Triple Cross / HO HO Interlocking puzzle by Stewart Coffin (STC #79) Assemble 12 identical pieces into the cross shape shown in the cover photo ( Triple Cross ). For added challenge, assemble 14 such pieces into the box shape in the…
Mushkila 4 Packing puzzle by Yavuz Demirhan Pack six pieces into a rectangular box with an obstructed opening, in such a way that only the lighter piece color is visible. When the puzzle is properly solved, the pieces will fit entirely…
Mushkila 3 Packing puzzle by Yavuz Demirhan Pack six pieces into a rectangular box with an obstructed opening, in such a way that only the lighter piece color is visible. When the puzzle is properly solved, the pieces will fit entirely…
Fusion-Confusion Interlocking puzzle by Stewart Coffin (STC #15-A) Assemble the four pieces into any of three symmetric polyhedral shapes. Fusion-Confusion is a modification of Coffin's earlier design Triumph , in which two pairs of…
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