Extremely Puzzling - Goetz Schwandtner's Puzzles

Interlocking Puzzles Explorer

This page allows to further explore the huge class of interlocking puzzles. In the standard view, all puzzles are shown in alphabetical order, and can also be ordered by their number of pieces or by their level (in descending order, from highest value to smallest, followed by the ones without an entry). Additionally, the list can be restricted to show only puzzles with rotation in the solution, or without rotations, and with coordinate motion moves, and without.

The current view is (click the other variants to change the view):

order: [alphabetically] [by pieces] [by level] rotations: [all] [only with] [only without] coordinate motion: [all] [only with] [only without]
99 Pieces
Japanese Crystal 99 Pcs
86 Pieces
Chuck The Puzzle Person
70 Pieces
The Skull
66 Pieces
The Cutler Cube Puzzle
54 Pieces
Clearwater small 54 pcs Papachuck
50 Pieces
Atom Raute
46 Pieces
Matryoshka Burr
45 Pieces
Phoenix Family
44 Pieces
Pussy Sticks b+w Pussy Sticks r+y
43 Pieces
C2-1 Num Lock (mixed base)
42 Pieces
Kumiki Masu
41 Pieces
40 Pieces
The Fortress
37 Pieces
36 Pieces
35 Pieces
Ternary Pin Burr
34 Pieces
Burrdos Chinese Fang Double Tiros Opal Puzzle Chess Set
33 Pieces
Burrnova Cubix Japanese Crystal 33 pcs
30 Pieces
CT269 Fortuna Grand Barriere Hell
29 Pieces
Complementary P-arity The Collective Ultimate Burr Set
28 Pieces
Big Interlocking Cube Dirty Dozen Caged Framed Burr Box
27 Pieces
Dovetail Cube MINE's CUBE in CAGE 333 Pollux
26 Pieces
Alien Power Tower (mix base - var st)
25 Pieces
Cube 81 Jakub's Cube Merry-go-round Quadlock 4 Split Maze Burr
24 Pieces
Aurora Barriere Colossus Cubloc Findis Teufelsknoten Friend with a shield Identity Matrix Kinsman Kumiki Log Cabin Coin Bank Lost Day Moira's Cube Pin Burr 2 S/M 24 Squirrel Cage Stabylonia Star Pendulum Unknown 24 piece burr* Visible Burr
22 Pieces
151er Teufel CFF Burr DCD-burr Eiger Fly Trap 2 Phoebe Ternary Burr Yamanaka Kumiki
21 Pieces
Binary Burr Knudde Pin Burr 1 Skunk
20 Pieces
Achille Casino 2 Crocs Cubloc S Earrings First Design Free the Monkeys Gumball 3K Konstrukt Kumiki Squashed Blossom Kumiki Torii Gateway Platon Puzzle Cube Special Edition Q.E.D. Spidernest The Slider
19 Pieces
Beware of the Snake Blue Beetle Centauri Devil's Pet 1 Devil's Pet 2 Devil's Pet 3 Devil's Pet 4 Dubstep Framed! Full House 2 Grandpa Framed Hercules Hooks 2 Quadlock 1 Rombak Save the Gorilla Smeagol Spider Web Treasure Quest
18 Pieces
18 Brueder 18 pc burr #3 18 pc burr 6x6x6 18 Pieces plated burr 18-in-Blocks 18-Piece II 3set Nesting 6 Piece  Burr Aldie Alf 3 Anlon Apollo Armilla Assembler's Challenge B-Box, Reactor Belopo Berserk BurrCirc Bottom Line Burrly Legal Burrly Sane for Extreme Puzzlers Burrly Sane for Professionals Burrly Sane for Woodworkers Burrn Burrner Buzzard Cannich Century Cephio Columbus Coming of Age MKII Condor Condor's Peeper CT 52 Dragon Burr Eighteen Eights Eighteen Piece 6x6x6 Burr Enmarcado Excelsior Four Burr Stick Frame Me Up Frankenstein Garuda Goliath 2 Helicon Jalpa Jiminy Jack John's Goliath Knossos Labyrinth Lange Wapper 54 Lange Wapper 54-2 Lattice Lippelo Lovely Manda 1 Burr Mayhem Microburr Minerva Mochalov-Cube 2006 Morpheus Mountain Muff Nightmare Phelan Phoenix Phoenix-Cabracan Plankton Saturn Scrooge Sensi Box Sidestep Sidestep II Simplicity Sleipnir Slidebox Spy Hole Super Cross Supernova Tadpoles The Baron The Barones The Kick The Old Man Of Hoy Tipperary Tiros Toban Troulle Twinkle Typhyter Van der Poel Burr mini Vertigo Waddon Wink Wobbe
17 Pieces
Crusade Cubax Dino Gateway Grasse and the perfume Lalibela Secret Burr The Cube
16 Pieces
Dirty Dozen Doender Dog Catcher Entropie Kameleon caged Kumiki Steam-Ship Maahes Maltese Satellit Puzzle b+w Satellit Puzzle w+o
15 Pieces
12 Bastards 15 Piece Japanese Interlocking Puzzle* 4+5+6 Diagonal Burr Allard's Think (c) Sticks Beware of the Dogs Constantin 456 Cross in a Cage Dino 2 Fly Trap Highway Kameleon Konstrukt A Rampart 2 Tarpan Triton Wausau 84
14 Pieces
4x4 Puzzle Adam and Eve in Paradise Atacama Bad Hare Day Black Widdow Boite 13 Boo Burr Cage #1-216-14 Kodo Delirium 13 Dovetail Bi-Cube Gobi IPP Burr Puzzle Jacket Mochalov-14 Nahnook Ani Puzzle Okto Cube Quintus Rubicon Sequence Cube Sewing Box The Devil and his Pet Traditional Puzzle Ball Traditional Puzzle Cube Traditional Puzzle Cube Two Burrs in a Basket Waltzing Whales Wausau 83
13 Pieces
Abacus Aracna Blue Beetle 2 Boards and Sticks with Frame Box of 12 Burry Joint Cage Puzzle Camelride Confucius 3 Dovetail Mix Crossknot Dozer Dragster Elephant Puzzle Frogurr Helix the Burr Hippo Hippo Puzzle Hog Wild Puzzle Hooks Iceburrg Kumiki Pig Kyberna Moose Peanuts Porcupine Rhinoceros Rhombic Maze Burr San Francisco Cable Car Scorpius Sphinx The Kong Puzzle Tippy Try Me Turtle Twin Cubes Wausau 82 Wood Knott Try This
12 Pieces
12 interlocking pieces* Al Capone Andromeda Arabesque Astrolabe Bamboo Burr 2 Bamboo Star Bicomplementary formation b/b:1/2 Binary Burr 10 small Burrliner Kruse Cell Block Centaurus Christmas Tree Cold Fusion Decemburr Dicey Box Dovetail Cage Dragon Riders EQ 12 pieces burr Four Cross Twelve Galaxy Puzzle I Gemini I.Q. Puzzle Schuettelknoten Jack's Dozen Kong Ming Lock l'Unifolie Lion King 2 Mercury Cube Puzzle Mochalov-12 Nesting 6 Piece Burr Net Block H Num Lock Pandora Plaza Racktangle Sand Witch Scott's Woman Siamese Twins Sisyphos Stairway The Box The Windmill Burr Transenna Trotzklotz Twelve Arrows Ultraburr Wausau 81
11 Pieces
Binary Burr 9 small Gun Puzzle Hanoi Tower IPP Burr Puzzle Koumei Log Puzzle Kumiki Cow Kumiki Robot Kumiki Stegosaurus Kumiki Tram La Cerradura 3D Long Skirt Mean & Extreme Oximoron Packira Rhino Siamese Burr II Sweet Sixteen
10 Pieces
AJ Puzzle Binary Burr 8 small Damocles Dinlas Double Kongmin Lock Dragon's Cave Excaliburr Forgotten Piece Fusion Geronimo Haselgrove-Box Jucar Juha 14 Kowloon Seal Luban Lock Kumiki Dog Kumiki Wild Boar Letterbox LTC in cage Mino MMMDXLVI  #8 Moluscub Obstacle Box Pushbutton Burr Ramu Octahedron Red Cow (Vache Rouge) Sonneveld 9 Piece Board Burr Steps Sydney Harburr Bridge Toms Square Dance
9 Pieces
2-3-4 9 Boards Burr 7x7 Aramis Avenger Puzzle Big Mac Binary Burr 7 small Burr of Nine Boxes Cage #1-125-10 Captain Castle Caught Heart Cochise Confusio Constantin 234 CPU Chip Crazy Horse Crosscut Crux Double Decker Eightpack Elevenses Enak Galaxy Puzzle II Geduldswuerfel Ghislina Goetz Grappe Hexagon Hellas Cube Hexahedroom Hot Dog Juha 8 Keychain Burr 9 pieces Keychain Die Kristallus Kumiki Airplane Kumikisaurus Lennox Burr Magic Wands Meandros Cube Misery Net Block G Noris-Cube Odd Repartition Oktobox Paraugas Polidoor Prisgon Scotsman 2 Silene Sitting Bull Smiley Burr Sputnik returns Switch Cube The Cup The Flying Scotsman Toaster 25 Toolbox 8x8x8 Kittiwake Traffic Light Try Me 2 Vivaldi Burr Windmillbox Xenon Zig Zag 2
8 Pieces
2 Halves Cage 4A 4 Stick 8 6^3 Board Burr 8 Pieces Burr Alastor Awful Eiffel Bill's Ball Bearing Burr Binary Burr 6 small Camera Conundrum Canal House Circuit Breaker Clamped Cube Cocoon Coniburr Courage Cubyful 2 Daedalus Double Image Double Noeud Dovetail Cube Dragon Cube Droid Elena's Burr Framework Gargamel Google Groovy Cubes Helix 2 Hermaphroditic Dovetail Cube Hotplate I-Trouble Jail Bars 2 Japanese Wood Joint Puzzle Juha 10 K-323 #1 K-419 #11 Kawai Tsugite Cube Kelvin Keychain Camera Kruispunt Kumiki 9mm Handgun Kumiki Airlines Kumiki Lucky Cat L(8)tice-2 La Cerradura Doble Loopy Loops Junior Magestic 3 Mixed Up Ovolo Padaung Rings Pulsar 2 PUZZLE* Quantum Entanglement Satburrn Schoolbus 2 Simplified Keyholes in a Cage Simply Complex Six Iberian Lynxes Spotted Cube The Puzzle Sticks Tourelle Tricolor Tricolor 2 Tricolor 3 Twelve Bow Ties Twin Board Burr Up Periscope! SUBtitle ... Vesa Burr 8 Writhing Snake Cube Zig Zag Zigguflat (8 pieces) Ziggurat
7 Pieces
3 Piece Burr Cube 50 3D Burger Puzzle 6 piece framed knot A Notched Trifecta beta Alcatraz Alcatraz Alcatraz Extreme Alligator Archives Awoi Cube 1 Awoi-Cube 2 Bamboo Burr 3 Bamboo Burr 4 Band Cube Bandido Behind Bars Binary Burr 5 small BioTIC Bird in the Nest Blind Burr Board and Cube Burr (Katsumoto Cube) Board Burr in Cage Bouquet Bouquet (small) Boxed Mixed Piece Burr Burr in Cage Caged Burr Chateau d'If Conclusion Congestion Coo-inter-pack Coronation Cube Corsage Cross in Cross Cryptos Cube in Cube Cubic Burr Cuckold Cup of Coffee Das missglueckte Modell Der verflixte Tresor Devil Die Zauberfloete - Tamino Doors and Drawers Dovetail Burr Puzzle Dovetail Soma Cube Dracula Dracula 2 Edge Corner Cube II El Regalo Enigma Fossil Burr Fossil Burr 2 Framed 6-piece burr Frankfurt-Cube Fundamentally Framed Burr 1 Gaia Giraburr Gravitational Burr Greyhound Half Lid Box Hobbit Hyperboloid Six-Piece Burr + extra Interlock II Involution Juha 12 Juha 7 K Cube Key Trap Keychain Heart Klaas Jan 23 Knobbel 24 Kubus/AncientKey La Mente Liberal Cube Literal Lateral Slide Log Jam Puzzle Love's Dozen as a Cube Magma Plus MajesTIC Manke Mayer's Cube Mimicry Mira Misused Key Morgenstern Nickel Box Nicolas and Friedolin Nina O.M.G Oh This Open Crochet Cube Padlock Burr Pappos Pause Perseus Pink Ivory Ring Premiere Prison Burr Pulsar Quads & Rings 2 Quantum Entanglement Exchange Recede Removable Structure Ruebezahl Rupture Schoolbus Sextboard Sher-Lock Extreme Six Pack 2 Slant Cube Slida Slow Waltz Snail Cube Surround T-Slot Burr The Box The Pelikan Tight Noose TimBurr Triangle Cube Burr Trichromat Tronc Commun 4 Tulip Uranus US Cube Vera
6 Pieces
+4 2 Temps 3 Mouvements 4 in 2 4x4x4 Elevator 6 board burr # 3 6 board burr #1 6 piece burr variation II 6GA Six Gates Arranged A Mazing Burr Abad s Level 9 Burr Agapan All Mixed Up All Mixed Up Variation ALPACA Amatores Amulet ApocalypTIC Arch Burr Puzzle Around the Bend Astro-Puzzle Atomihedra Bamboo Burr 1 Barcode Burr (printed) Barcode Burr (printed) Barcode Burr Master Set Upgrade Barcode Burr Master Sets Upgrades Bent Board Burr Bent Board Burr #4 Bent Board Burr #4 Too Binary Burr 4 small Boston Tea Chest Box with Two Balls Boxed Burr Boxed Six Board Burr Boxes And Frames Brace Yourself Bubinburr Burr Lock E Burr with Rings By George Burr Cage 6 Carbo Cube Century Cube Chainstitch Chapel #1 Chen's 6 BB Chequered Board Burr Chinese Knot Chinese Knot Chocolate Dip Burr Circelei Coaxial Cold Fusion Combined Burr Coming of Age Computer's Choice Confluence Crazy Swiss Cube Crooked 6 Board Burr #2 Crooked 6 Piece Burr Original Version Crooked 6 Piece Burr Pinned Version Crossex Crossing Rails 14 Cruz del Maestro Crystalburr Cubed Burr II Cubelock Cubic Board Burr Deadlock Puzzle Der Astronomen-Stern Diagonal Burr Big Diagonal loop #2 Die Zauberfloete - Koeningin der Nacht Dilemma Dilemma II Doppelknoten Double Slideways Burr Double Slideways Burr Plus Double Slideways Burr TSP Double Slideways Burr TSP+ Double Slideways Burr TSP- Double Slideways Burr TSP-+2W Double Slideways Burr+D Dovetail Burr Dragon puzzle w/Washington Monument Dutch Cross Dwarf Planet D Easy Livin Eiffel Burr Eight is Enough Elbow Burr Eye Fill Burr Fallingwater Burr Finnish Cross Five O'lock Five Sticks 28 Flange 99A Freddy Free Pause GalacTIC GeneTIC Goot 1 Gordian Knot Gravity Grooved 6 Board Burr #1 Grooved 6 Board Burr #2 Grooved 6 Board Burr #3 Grooved 6 Board Burr #4 Grooved 6 Board Burr #5 Grooved 6 Board Burr #6 Grooved 6 Board Burr #7 Gyro Hakenwuerfel Hammerhead Burr Happiness Cube 169 Happiness Cube 20.2 Happiness Cube 20.2 Happiness Cube 95.2 Hedgehog Burr Helix+ Hexalo Hexon Holey 6 Board Burr II Hooked Impossiburr In Brackets Interlocking Small Turtle Irregular Board Burr Jadimex Jellyfish Juha 5 Jump Keep I on the Burr Kei Cube Jr Keychain Ladybird Keyholes KeyTIC Knobbel 26 Knobbel 28 Knobbly Box Knotenwuerfel Knotty 6 Kreuzknoten g+b Kreuzknoten gr L-Burr L-Burr Lolly Box 4 Long and Short/Coffin 20-D Loopy Burr Loopy Cube Love Cube Love's Dozen Luxemburr Mega Six Mini Burr Keychain Mini Chinese Knot Mini Schoolbus Missing Notch Mixed Plate Burr Murbiters Devilish Burr for IPP36 Nested Burr Simple Net Block A Net Block C Net Block D No Nukes! NOS1 Compressed NOS2 Transfer NOS3 Round Trip NOS4 Go Back NOS5 Crenel NOS6 Dodge NOS7 Seizaine Nur Mut Off-Center Burr Ozone P Burr Pack the Square Parallel Puzzle Partially Crooked 6 Board Burr PedanTIC Pegasus Pirouette Pivot Plus-Cross Portico J Pot van Olen Printable Interlocking Puzzle 4 Printable Interlocking Puzzle 4 Proxima Centrauri Quads & Rings 1 Quintuples Ribbons Puzzle Ring Fight Ring Lock Robrecht 02 Rombo Roots and Branches Rota Cube Rough Night Rounded Burr Runde Sache S.O.B.B.#1 Self-Framing Burr Serflex Sheffield-Steel 6BB Shift Burr L2 Singapore 5x5x5 Six Pack Six Spades SIX XIS Sixbricks Sixticks Skewed Six Piece Burr* Sliced Burr Simple Sly Burr Small interlocking barrel* Small interlocking cube* Small rounded interlocking cube* Snooky Spiral Lock Sputnik Square Target Squarrel Star Beams Star of Six Pieces Steady State Cube Stepping Burr Stuck in the Middle Sucrier T Burr T-Junction Talisman Taurus Teufelsknoten T14 The Blitz 6 Piece Burr The Elevator The Kray Twins The Piston Puzzle Timonen Burr Timonens Burr Simple Titan Tower Trick Star p+p Trick Star red Tricolore Trikado Trilogy Triple Cross Burr Tronc Commun 3 Troubled Burr Try-Cycle Puzzle Tumbler Turnblock 335 Tvnary Twist the Night Away Two by Three Type-I Two Wheeled Cube U-Nam-It Burr Unity 3=6 Unknown Flower Crystal Variation of Illegal Burr* Vesa Burr simple Visible Cube Voodoo Cube Walton Cube White Mischief Puzzle Wide Portico Worm Cube Wunderbar Inspiration Wunderbar Inspiration Y6BB #1 Zig-zag Knot Zigguflat
5 Pieces
2 Halves Cage 3BB 2 Halves Cube 3 lives to live 4 Caged Puzzle 4 in Frame 4 pieces in frame Accordion (Disjointed Cube) Accordion (Disjointed Cube) Altair Arrow Basket Burr BathLed Benedettis Kaefig Big Havana's Big Quadrox Binary Burr 3 small Board Burr Rack Bolero Boxed L-burr 2 Bramble Box Bundle of Sticks Burr Box 1 Burr In A Cage Cage Amovible Cage for 4 Sticks Campanus Captain Hook Cascadia Cast Cylinder CatharTIC Chain Changing Partners Checkbox Checker-board interlock box CheckerDice Cube Chicken Puzzle Choreographed Motion Convolution's Cousin Cross Imprisioned Extra Delight Dino Dizzy Cube Extreme Boxed Burr FantasTIC Fenced Burr Five Burr-ito Flat Vortex 1 Floating Framed Burr Foliage Four in a Box Four Mirror One FourTress Puzzle Framed Sticks 4U Galaxy Z Garmbaad Gear Get in the Box! Gift GiganTIC Glitter Havana's 2 Havannas 1 Hex Pyramide Hourglass Hublot 2 Ice Pillar Inner Cube Interlock the red square box (A) Interlock the red square box (B) IT Janus Juha 2 Juha 6 Juha Element Puzzle Juha's Interlocking No.1 Ka'apuni Kardan Khamsin King's Court Knot on my Watch Life@21 Little Hug Little Portico Lock-N-Cube Lolly Box Lolly Box 2 Lox Box LunaTIC Madia Matador Mean Cube Migraine Mini Lock 2 Mississippi Mud Moonflight Multiwood Cube Murbiter's Pseudo Burr Mysterious Galaxy MysTIC Neo Saturn Net Block F Open Cube Open Window Optiborn Overlap PackTIC #2 Pandora's Box PenTIC Petit Box Pin Block Case Pinned Framed Burr L Pinned Framed Burr M Pinned Framed Burr S Poco Loco Pontoon Pox Box Proteus Quadrant Quadrox Quickstep Rail Box Rat Trap Rattle Box Rectangle Block Rose Rotary Cub Sarcophagus Shake Something Sharp Belted Shield Slider 2 Spiral Cube #2 Sputnik Swirls No 1 Tangle Tango The Maze Think outside the box Threaded Cube Toughie II Turnkey Twister 3x2 TwisTIC United Variation on a Waltz Visible Framed Burr Vortex Waffle Walnut Cube Wedged William's Wonder X TIC YyYy
4 Pieces
16 Bar Cube II 2 and 2 Burr 2 Pairs 2 Pairs One 3 Open Minds Solve a Problem 3 Q Cube Addition Almost There Ambigram Burr Aqua Toto Aquarius+ Assembly Cube Assorted Snakes Bandocub Belt Cube 3 Benedettis 7-er Bisect Frame 2S Black Hole Burr Borromean Braid Too Brandenburg Gate La Porte Buffalo Nickel Puzzle Caged Knot Canuck Cast Hexagon Castle Hole Chamburr Chiasma Chinesischer Teufel Climburr Closed Box Cockpit Coffin's Four Piece Cube Coherence Crystal Ring Cubetresor Cubic Lock Cyburr Den Cube Devil in Cage Domino Tower Double Heart&Arrow Double Lock Eccentricity Engpass Quadrat Estergon Estergon 2 Four in the Vice GELO 1234 GEM Geneva GOeTZ Helical Burr Helical Burr 2 Helix Burr v2 HELLical Burr Identity 4b Impossible Cube Internal Combustion Irene Alternate Kamelle Box Keyhole La Foudre Letterbox Little Bruce Little Kenny Little Trick LocomoTIC Math Mini Lock Missing Link More MazNCubes Non-Void Cube Noppenkuber NPP Puzzle Odd One Out Oliver Oskar Key Party Pepper Castor Petit Pack Pif Paf With A Turn Planar Burr Polar Burr Prismastar Quad Slideways Burr Rail Box #1 Rift Rondo Turco Rota # Rotamove Cube Saturno #1 Screw Burr Simple Sharp Sliced Bread Sonneveld Cubed Burr Sonneveld's 4 Piece Cube Spiral Square Stack of Sticks Stairs Cube SwapTIC Sweeney Todd Swiss Cube #2 Hard Tetradyma 5x5 Three totally trapped sages Three trapped sages Tom Pouce Top Toughie I Trap-R2 Trenta Triad Triangle Explosion Tribord Trickbox Troika Turtle's Heart Tweedle 11 Tweedle 14 Twiddle Dee Helical Burr Twiddle Dum Helical Burr Twisting Cube Twisty Hollow Two-Tone Zero Vauban H 5 Vectes Vesa's Four W-Windows Zigguflat (4 pieces) ZigZag Planar Burr Zmije
3 Pieces
2PBB Two Pieces Boxed Burr 3 identical piece burr ON 3 Piece Burr key-o 4L Co-Mo DD 4LCoMo Angelus Big MazeNCubes Cast Infinity Clutch 1 Clutch 2 Clutch 3 CM13 COC Columnata 2P3C Cubie Burr Cubie Burr #2 Curly Cube Deadly Romance Double Dutch Burr Double UT Giga Burr Grand Giga Burr Happy Dance Heavy Metal Triangle Heblo Hex-Puzzle 1 Hexatresor HOPE Identical Twins Identity 4a Interlock 3 Pieces Juha 9 Just 3 Lattice (big) Lattice (small) Leftovers Liliput Little Slide Plank Lock Nested Burr Lock Nested Burr Lucida MiBinity I N-One Open Window Oskar's Blocks Oskars Two Piece Packing Problem Petit Puzzle Phoenix Pole Dancer Popp (simplified) Pylon 2P2C Rattle Twist III Rattle Twist V Really Big MazeNCubes Red, White and Blue Repair The Cube Rivieara Rose Pennyhedron Rotator Segment Stack Star Simple UC Trapped Slideways Slideways Cube Slideways Cube (printed) Sliding Hamburger Souvenir DCD2012 Sputnik T-one The 3 Circles The Minotaur's Burr Tom's Hollow Cube Triade Trilogy Trinity-Puzzle Triple Play Tritresor TriumviraTIC Troacroas Tube Cube Tube Cube Tubular Burr Tubular Burr Two in Frame Uncoated Burr Vapors Puzzle Verflixter Knoten (Cheers) Welded Burr Wing Hangar World's smallest cube Wunder-Puzzle Xs and Os
2 Pieces
2 Rings Cross Bones Cross-Cage Cross-Keys puzzle Culax Infant Box Insinuate Puzzle Intertwingly IPP34 Necklace Burr Lattice II Little Maze Box Orchid Pennyhedron Reunification (Twins) Rotpack 1 Rotpack 2 Tangler Two piece packing eXtreme Utopian Cube X-Lattice