{"title":"6 Piece Puzzles","description":"\u003cp\u003eSix pieces is the classic count. The 6-piece burr, the wooden cross most people have met at least once, has six notched sticks, and so do many of the puzzles that grew out of it.\u003c\/p\u003e\u003ch2\u003eWhere to start\u003c\/h2\u003e\u003cp\u003eThe \u003ca href=\"\/ja\/products\/6-piece-star-puzzle\"\u003e6-Piece Star\u003c\/a\u003e is rated Easy, and the \u003ca href=\"\/ja\/products\/6-piece-cross-puzzle\"\u003e6-Piece Cross\u003c\/a\u003e is the classic burr, rated Medium. If you get stuck, there are step-by-step guides for both: \u003ca href=\"\/ja\/blogs\/greg-puzzles-blog\/how-to-solve-the-6-piece-burr-puzzle\"\u003ehow to solve the 6-piece burr\u003c\/a\u003e and \u003ca href=\"\/ja\/blogs\/greg-puzzles-blog\/how-to-solve-the-6-piece-star-puzzle\"\u003ehow to solve the 6-piece star\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eFrom there it gets serious. \u003ca href=\"\/ja\/products\/alpacka-1\"\u003eAlpacka 1\u003c\/a\u003e, \u003ca href=\"\/ja\/products\/alpacka-2\"\u003eAlpacka 2\u003c\/a\u003e, \u003ca href=\"\/ja\/products\/toplun-puzzle\"\u003eToplun\u003c\/a\u003e and \u003ca href=\"\/ja\/products\/conga-line\"\u003eConga Line\u003c\/a\u003e are packing puzzles rated Hard. \u003ca href=\"\/ja\/products\/6n-puzzle\"\u003e6N\u003c\/a\u003e, \u003ca href=\"\/ja\/products\/a6l-puzzle\"\u003eA6L\u003c\/a\u003e and \u003ca href=\"\/ja\/products\/shutout-puzzle\"\u003eShutout\u003c\/a\u003e are hide-the-holes puzzles rated Expert.\u003c\/p\u003e\u003cp\u003eThen there are the separated board burrs by \u003ca href=\"\/ja\/collections\/frans-de-vreugd\"\u003eFrans de Vreugd\u003c\/a\u003e, six flat boards instead of sticks: \u003ca href=\"\/ja\/products\/zigzag\"\u003eZigZag\u003c\/a\u003e is rated Hard, and \u003ca href=\"\/ja\/products\/torture\"\u003eTorture\u003c\/a\u003e and \u003ca href=\"\/ja\/products\/extreme-torture\"\u003eExtreme Torture\u003c\/a\u003e are rated Expert. More in \u003ca href=\"\/ja\/collections\/burr-puzzles\"\u003eburr puzzles\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdetails class=\"gp-faq\"\u003e\u003csummary\u003e\u003ch3\u003eWhat is a 6 piece puzzle?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"gp-faq__a\"\u003e\u003cp\u003eUsually a 6-piece burr: six notched sticks that lock together into a cross or star with no glue or hidden mechanism. In this collection the name also covers six-piece packing puzzles, board burrs and turning interlocking cubes.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"gp-faq\"\u003e\u003csummary\u003e\u003ch3\u003eHow do you solve a 6 piece burr puzzle?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"gp-faq__a\"\u003e\u003cp\u003eFind the key piece, the one that slides out first, then take the rest apart in order and note how each piece sits. Reassembly is the reverse. Our \u003ca href=\"\/ja\/blogs\/greg-puzzles-blog\/how-to-solve-the-6-piece-burr-puzzle\"\u003e6-piece burr guide\u003c\/a\u003e walks through it step by step.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"gp-faq\"\u003e\u003csummary\u003e\u003ch3\u003eWhat does 6+1 mean?\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"gp-faq__a\"\u003e\u003cp\u003eSix pieces plus a box, frame or tray. The extra part is not something you assemble, it is the space the pieces have to fit into, and it is usually what makes the puzzle hard.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e","products":[{"product_id":"alpacka-1","title":"Alpacka 1 | フレームに6個入り","description":"\u003cp\u003eAlpacka 1 は、すべてのピースを中に詰めるというシンプルな目標のパズルです。\u003c\/p\u003e\n\u003cp\u003eピースの作りのおかげで、このパズルは迷路としても機能します。ほとんどの行き止まりはパズルの中ではなく、あなたの頭の中にあります。\u003c\/p\u003e\n\u003cp\u003e動きを楽しみ、ピースをフレームの中に入れる方法を計画してください！\u003c\/p\u003e\n\u003cp\u003eアップデート 1.1 - 新色！\u003c\/p\u003e\n\n\u003cp\u003eAlpacka 1 の特徴は何ですか？\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e戦略的思考力を養う\u003c\/li\u003e\n\u003cli\u003e論理的計画力と想像力\u003c\/li\u003e\n\u003cli\u003e次元推論の挑戦\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eデザイン：Alexander Magyarics\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":46538358489255,"sku":"GP-ALPA1","price":26.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/alpacka_1_marble.png?v=1782042727"},{"product_id":"6-piece-star-puzzle","title":"6ピーススターパズル | 星の脳トレ","description":"\u003cp\u003e6ピースのスターパズルは、私が初めて解いたパズルの一つです。\u003c\/p\u003e\n\u003cp\u003e初めてこのパズルを分解した時のことを覚えています。とても驚きました！\u003c\/p\u003e\n\u003cp\u003e元に戻すのが本当の挑戦です。\u003c\/p\u003e\n\n\u003cp\u003e6ピーススターの特別な点は何ですか？\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3Dの想像力を養う\u003c\/li\u003e\n\u003cli\u003e創造的思考が必要\u003c\/li\u003e\n\u003cli\u003e忍耐力を試す\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e一度試してみれば、その理由がわかるでしょう。\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Marble White","offer_id":46556039053479,"sku":"GP-6STAR-MARWHI","price":15.0,"currency_code":"USD","in_stock":true},{"title":"Oreo","offer_id":46556039086247,"sku":"GP-6STAR-ORE","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/6_piece_star_marble.png?v=1782038337"},{"product_id":"6n-puzzle","title":"6Nパズル | 穴を隠す","description":"\u003cp\u003e6Nは、山本長徳氏による驚くほど挑戦的なパズルです。\u003c\/p\u003e\n\u003cp\u003e6つの同じN字型のピースを使って、フレームの中にキューブを構築します。すべてのピースがフレームの中に収まり、すべての入り口が覆われたらパズルは完成です。\u003c\/p\u003e\n\u003cp\u003e同じピースを使ったパズルを作ることは、デザイン上非常に難しい挑戦です。それを素晴らしいパズルにすることはさらに困難です。6Nは2025年の東京パズルデザインコンペティションの出品作でした。そこでこれを解いた後、私はすぐに修平さんに、皆様と共有する許可を求めました。\u003c\/p\u003e\n\u003cp\u003eサイズ: 55mm X 55mm X 55mm\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":47305028567207,"sku":"GP-6N","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/6n_marble.png?v=1781970200"},{"product_id":"toplun-puzzle","title":"トップルンパズル | ピースをはめよう","description":"\u003cp\u003eToplunは山本長徳によるパズルです。\u003c\/p\u003e\n\u003cp\u003e様々なピースを使って、フレームの中に立方体を組み立てます。すべてのピースが3x3x3の立方体として箱の中に収まれば完成です。\u003c\/p\u003e\n\u003cp\u003eこの種の他のパズルとは異なり、この挑戦は穴のない立方体を作ることを要求されます。\u003c\/p\u003e\n\u003cp\u003eサイズ：55mm X 55mm X 55mm\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":47305305751719,"sku":"GP-TOPL","price":28.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/toplun_marble.png?v=1782032652"},{"product_id":"6-piece-cross-puzzle","title":"6ピースクロス型パズル","description":"\u003cp\u003e6ピースクロスパズル（別名：6本組バーパズル）は、誰でもバーパズルに親しめる定番のパズルです。\u003c\/p\u003e\n\u003cp\u003eバーパズルとは、接着剤を使わず、物理的な形状のみで複数のピースを組み合わせて作られるパズルの一種です。\u003c\/p\u003e\n\u003cp\u003eあなたの目標は、6つのバーピースを分解し、元の構造に組み立て直すことです。\u003c\/p\u003e\n\u003cp\u003e外部ツールは使用できません。\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":47842463744167,"sku":"GP-6CROS","price":13.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/6_piece_cross_marble.png?v=1782067074"},{"product_id":"alpacka-2","title":"Alpacka 2 | フレームに6ピース収納","description":"\u003cp\u003eAlpacka 2は、すべてのピースを中に詰めるというシンプルな目的のパズルです。\u003c\/p\u003e\n\u003cp\u003eこれはAlpacka 1の続編です！\u003c\/p\u003e\n\u003cp\u003eピースの構造上、このパズルは迷路としても機能します。ほとんどの行き止まりはパズルの中ではなく、あなたの頭の中にあります。\u003c\/p\u003e\n\u003cp\u003e動きを楽しみ、ピースをフレームの中に収める方法を計画してください！\u003c\/p\u003e\n\n\u003cp\u003eAlpacka 2の特長は何ですか？\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e戦略的思考を養う\u003c\/li\u003e\n\u003cli\u003e論理的計画と想像力\u003c\/li\u003e\n\u003cli\u003e次元的な推論の挑戦\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eデザイン：Alexander Magyarics\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":47889505058983,"sku":"GP-ALPA2","price":26.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/alpacka_2_marble.png?v=1782043506"},{"product_id":"a6l-puzzle","title":"A6Lパズル | 穴を隠す","description":"\u003cp\u003eA6Lは、山本長徳氏による難易度の高いパズルです。\u003c\/p\u003e\n\u003cp\u003e6つの同じL字型ピースと1つのI型ピースを使って、フレーム内に立方体を組み立てます。すべてのピースがケージ内に収まり、すべての入口が覆われたときにパズルは解決します。\u003c\/p\u003e\n\u003cp\u003e6つの同じピースでパズルを作るのは、設計上かなりの難題です。それを素晴らしいパズルにするのはさらに難しいです。このパズルはその両方を成し遂げており、最も強い人には最終的にそのシーケンスが明らかになるまで、パズルを探索することになります。\u003c\/p\u003e\n\u003cp\u003eサイズ: 55mm X 55mm X 55mm\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":47964805202087,"sku":"GP-A6L","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/a6l_marble.png?v=1782068652"},{"product_id":"shutout-puzzle","title":"シャットアウトパズル | 穴を隠せ","description":"\u003cp\u003eシャットアウトは、山本長徳氏によるもう一つの難解なパズルです。\u003c\/p\u003e\n\u003cp\u003e6つの同じT字型ピースを使い、フレーム内に明らかな立方体を作らなければなりません。すべてのピースがケージ内に収まり、すべての入り口が覆われたときにパズルは解決します。\u003c\/p\u003e\n\u003cp\u003e同一ピースのパズルを作ることは、設計上大きな課題です。それを優れたパズルにすることはさらに困難です。このパズルは両方を成し遂げ、最終的にその順序が最も強い人に明らかになるまで探求させます。\u003c\/p\u003e\n\u003cp\u003eサイズ：55mm X 55mm X 55mm\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":47964870934695,"sku":"GP-SHUT","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/shutout_marble.png?v=1782067998"},{"product_id":"pedantic-turning-interlocking-cube","title":"PedanTIC | 連動キューブ","description":"\u003cp\u003ePedanTICは、Andrew Crowellが設計したTurning Interlocking Cubeパズルです。一見すると、ただはめ込むだけで完成するように見えますが、そうではありません。\u003c\/p\u003e\n\u003cp\u003e目標：すべてのピースを組み立てて3x3x3のキューブを完成させる。分解された状態でお届けします。\u003c\/p\u003e\n\u003cp\u003e分解された状態でお届けします。\u003c\/p\u003e\n\u003cp\u003eAndrew Crowellの伝説的なTICシリーズの一部です。見た目は幾何学的で整然としていますが、真っ直ぐに押し込んでも何も進まないことに気づくまではそう思えるパズルです。\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePedanTICの特別な点とは？\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e直線的な組み立てだけでなく、回転操作が必要\u003c\/li\u003e\n\u003cli\u003e3D空間認識能力を養う\u003c\/li\u003e\n\u003cli\u003e満足感があり、繰り返し挑戦したくなる\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eデザイン：Andrew Crowell\u003c\/p\u003e\n\u003cp\u003eサイズ：60x60x60mm\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":50049169686695,"sku":"GP-PEDA","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/pedantic_marble.png?v=1782125568"},{"product_id":"conga-line","title":"コンガライン｜6ピースのパッキングパズル","description":"\u003cp\u003eSix unusually shaped turquoise pieces. One marble-white frame. This innocent-looking puzzle may be tricky to figure out!\u003c\/p\u003e\n\u003cp\u003eGoal: pack all the blue pieces into the frame so nothing sticks out.\u003c\/p\u003e\n\u003cp\u003eThird puzzle from the rising designer \u003ca href=\"\/ja\/collections\/samuel-cook\"\u003eSamuel Cook\u003c\/a\u003e following Jigsaw Traffic and Turbulence. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's special about Conga Line?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDevelops advanced spatial imagination\u003c\/li\u003e\n\u003cli\u003eDeceptively tricky piece interactions\u003c\/li\u003e\n\u003cli\u003eSatisfying and clean when solved\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDesigned by Samuel Cook\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":51109616156839,"sku":"GP-CONGLINE","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/conga_line_marble.png?v=1786011102"},{"product_id":"extreme-torture","title":"エクストリーム・トーチャー｜70手の板組木","description":"\u003cp\u003eTo be frank, I highly doubt anyone will ever solve our version of this puzzle without outside help.\u003c\/p\u003e\n\u003cp\u003eThat is not a sales line. The version most people have met came assembled in a box with a solution booklet. Ours arrives as six loose boards and nothing else.\u003c\/p\u003e\n\u003ch2\u003eExtreme Torture - Quick Summary\u003c\/h2\u003e\n\u003cp\u003eExtreme Torture is a six-piece separated board burr designed by Frans de Vreugd in 2002. It takes 70 moves to take apart - burr level 28-22-9-8-3 - the hardest form found in de Vreugd's research. Expert difficulty, 4+ hour solve time. Ships disassembled.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e solvers who have finished the hard puzzles in their collection and want something that will genuinely beat them for a while, and collectors who measure a puzzle by how long it held out.\u003c\/p\u003e\n\u003ch2\u003e70 Moves\u003c\/h2\u003e\n\u003cp\u003eDe Vreugd did not design this by hand. He fed separated board burrs into \u003cstrong\u003eBurrgrower\u003c\/strong\u003e, a program written to raise the level of a puzzle - first drafted by Dic Sonneveld and rewritten in C++ by \u003ca href=\"\/ja\/collections\/goh-pit-khiam\"\u003eGoh Pit-Khiam\u003c\/a\u003e, whose own packing puzzles we carry. Extreme Torture is what came back.\u003c\/p\u003e\u003cp\u003eThe level notation reads 28-22-9-8-3: twenty-eight moves just to free the first board, then twenty-two more for the second, then nine, then eight, then three.\u003c\/p\u003e\n\u003cp\u003eNothing about it yields early. You can make twenty correct moves and have nothing visible to show for it.\u003c\/p\u003e\u003ch2\u003eThe Scale of the Search\u003c\/h2\u003e\u003cp\u003eDe Vreugd published the numbers himself. He narrowed the design space to \u003cstrong\u003eeleven\u003c\/strong\u003e usable board shapes, which give \u003cstrong\u003e8,008\u003c\/strong\u003e possible six-piece sets. Those sets can be fitted together in \u003cstrong\u003e1,364,932\u003c\/strong\u003e ways.\u003c\/p\u003e\u003cp\u003eOnly \u003cstrong\u003e2,394\u003c\/strong\u003e of those can be taken apart again - \u003cstrong\u003e0.18%\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThat is the context this puzzle sits in. Almost everything that looks like a solved board burr is a dead end, and Extreme Torture is the hardest thing that survived the search.\u003c\/p\u003e\n\u003ch2\u003eWhere the Design Came From\u003c\/h2\u003e\n\u003cp\u003eIt started with a suggestion. Jim Gooch told de Vreugd that you could take a standard six board burr and pull the two boards in each pair one unit apart. De Vreugd wrote a search to find piece sets that would still assemble. \u003ca href=\"\/ja\/products\/zigzag\"\u003eZigZag\u003c\/a\u003e came out first, then \u003ca href=\"\/ja\/products\/torture\"\u003eTorture\u003c\/a\u003e at level 17.4, and then he made one last push with the software. Extreme Torture is the end of that road.\u003c\/p\u003e\n\u003ch2\u003eSold for Years as Gordian's Knot\u003c\/h2\u003e\n\u003cp\u003eThis design went into commercial production in 2002 under the name Gordian's Knot, made by ThinkFun, now part of Ravensburger. That is where most people ran into it, on a toy shop shelf rather than in a puzzle collection. It has since been discontinued.\u003c\/p\u003e\n\u003cp\u003eGreg Puzzles is not affiliated with ThinkFun or Ravensburger. We list the design under the name Frans de Vreugd gave it, and ours comes out of the box in pieces.\u003c\/p\u003e\n\u003ch2\u003eIt Arrives in Pieces\u003c\/h2\u003e\n\u003cp\u003eThis puzzle ships disassembled, and that is deliberate. Assembly is the challenge, and handing it to you already solved would remove the entire point. It also means you are working those 70 moves in reverse, with no solved reference state to copy and no photograph to work backwards from. You get six boards and the knowledge that they fit.\u003c\/p\u003e\n\u003cp\u003eExpect to put it down and come back to it. Most people do.\u003c\/p\u003e\n\u003cp\u003eIf you would rather work up to this one, all three are sold together as the \u003ca href=\"\/ja\/products\/separated-board-burr-set\"\u003eSeparated Board Burr Set\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eHow many moves does Extreme Torture take?\u003c\/h3\u003e\n\u003cp\u003e70 moves to disassemble. The burr level is 28-22-9-8-3 - the first board alone takes 28 moves to free.\u003c\/p\u003e\n\u003ch3\u003eDoes Extreme Torture arrive assembled?\u003c\/h3\u003e\n\u003cp\u003eNo. It ships disassembled, as six separate boards. Assembling it is the puzzle - a solved puzzle in the box would be no puzzle at all.\u003c\/p\u003e\n\u003ch3\u003eHow hard is Extreme Torture?\u003c\/h3\u003e\n\u003cp\u003eExpert, and at the top of that band. Plan on four hours or more spread across more than one sitting, and do not treat it as a reasonable first attempt at interlocking designs. It is the hardest form found in de Vreugd's research.\u003c\/p\u003e\n\u003ch3\u003eIs Extreme Torture the same as Gordian's Knot?\u003c\/h3\u003e\n\u003cp\u003eIt is the same design. Frans de Vreugd named it Extreme Torture in 2002, and it went into commercial production that year as Gordian's Knot, which has since been discontinued. We use the designer's original name.\u003c\/p\u003e\n\u003ch3\u003eWho designed Extreme Torture?\u003c\/h3\u003e\n\u003cp\u003eFrans de Vreugd, a Dutch puzzle designer, in 2002, working from Jim Gooch's separated board burr idea and using Burrgrower, the level-raising software written by Dic Sonneveld and \u003ca href=\"\/ja\/collections\/goh-pit-khiam\"\u003eGoh Pit-Khiam\u003c\/a\u003e.\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":51347709919399,"sku":"GP-EXTRTORT","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/extreme_torture_marble.png?v=1790218328"},{"product_id":"zigzag","title":"ジグザグ｜最初の分離型板組木","description":"\u003ch2\u003eZigZag - Quick Summary\u003c\/h2\u003e\n\u003cp\u003eZigZag is the first separated board burr ever built, designed by Frans de Vreugd in 2002 from an idea by Jim Gooch. Six flat boards, level 7.8: seven moves to split the puzzle into two identical halves, then eight more to free a board from each half. Hard difficulty, 1-4 hour solve time. Ships disassembled.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e burr collectors who want the puzzle that started a whole family of designs, and solvers stepping up from standard six-piece burrs into board burrs for the first time.\u003c\/p\u003e\n\u003ch2\u003eIt Started With One Sentence\u003c\/h2\u003e\n\u003cp\u003eA standard six board burr has six flat pieces grouped in three pairs. Jim Gooch, a puzzle maker from Oregon, suggested to Frans de Vreugd that you could pull the two boards in each pair one unit apart and see what happened. The shape that came back was more open, with far more room for complicated movement, and nobody knew whether a working set of pieces even existed.\u003c\/p\u003e\n\u003cp\u003eDe Vreugd spent a full day on it. Hundreds of combinations came apart into nothing. Then he tried two zigzag-shaped boards, and this puzzle fell out of it. George Miller had a small run made within days, and it was introduced at the fifth Gathering for Gardner in Atlanta.\u003c\/p\u003e\n\u003ch2\u003eSeven Moves, Then It Splits\u003c\/h2\u003e\n\u003cp\u003eThe piece set is completely symmetrical, and so is the solution. Seven moves in, the whole lattice comes apart into two identical halves. Then you need another eight to get a board out of each half.\u003c\/p\u003e\n\u003cp\u003eThat symmetry is why ZigZag is the right place to start with this family. There is a logic you can actually see once you find it, which is not something you can say about \u003ca href=\"\/ja\/products\/torture\"\u003eTorture\u003c\/a\u003e or \u003ca href=\"\/ja\/products\/extreme-torture\"\u003eExtreme Torture\u003c\/a\u003e. It is also not the only way through - there is a shorter route and a couple of longer ones - so the puzzle forgives you a little.\u003c\/p\u003e\n\u003cp\u003eOurs is printed in two colours, which makes it much easier to keep track of which board you just moved.\u003c\/p\u003e\n\u003ch2\u003eIt Arrives in Pieces\u003c\/h2\u003e\n\u003cp\u003eSix loose boards, no solved reference to copy and no photograph to work backwards from. Assembly is the puzzle. Handing it over already built would remove the point of it.\u003c\/p\u003e\n\u003cp\u003eIf you already know you want the whole family, ZigZag, Torture and Extreme Torture are sold together as the \u003ca href=\"\/ja\/products\/separated-board-burr-set\"\u003eSeparated Board Burr Set\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is a separated board burr?\u003c\/h3\u003e\n\u003cp\u003eA standard six board burr has six flat pieces in three pairs. In a separated board burr the two boards in each pair sit one unit apart instead of flush together. The gap opens the shape up and leaves room for far longer move sequences. Jim Gooch suggested the idea in 2002, Frans de Vreugd designed the puzzles that came out of it.\u003c\/p\u003e\n\u003ch3\u003eHow hard is ZigZag?\u003c\/h3\u003e\n\u003cp\u003eHard, not Expert. Seven moves to split it and eight more after that, with a symmetry you can lean on. It is the gentlest of de Vreugd's three separated board burrs, and the one to own first.\u003c\/p\u003e\n\u003ch3\u003eDoes ZigZag arrive assembled?\u003c\/h3\u003e\n\u003cp\u003eNo. It ships as six separate boards. Assembling it is the challenge.\u003c\/p\u003e\n\u003ch3\u003eWho designed ZigZag?\u003c\/h3\u003e\n\u003cp\u003eFrans de Vreugd, in 2002, from a suggestion by Jim Gooch. The original run was made by George Miller for the fifth Gathering for Gardner.\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":51411264110759,"sku":"GP-ZIGZ","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/zigzag_marble.png?v=1790218141"},{"product_id":"torture","title":"トーチャー｜7,680通りから唯一の解","description":"\u003ch2\u003eTorture - Quick Summary\u003c\/h2\u003e\n\u003cp\u003eTorture is a six-piece separated board burr designed by Frans de Vreugd in 2002, burr level 17.4. The six boards form 7,680 assemblies, and exactly one of those is a solution. Expert difficulty, 4+ hour solve time. Ships disassembled.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e burr collectors who already own a board burr or two and want the one with a genuinely unique solution, and solvers who have finished \u003ca href=\"\/ja\/products\/zigzag\"\u003eZigZag\u003c\/a\u003e and want the next step up.\u003c\/p\u003e\n\u003ch2\u003eOne Solution Out of 7,680 Assemblies\u003c\/h2\u003e\n\u003cp\u003eMost interlocking puzzles let you wander a bit. Torture does not. De Vreugd ran a computer search across every combination of pieces this shape allows. 7,680 of them are assemblies, meaning the boards genuinely form the finished shape. Exactly one of those assemblies is a solution, meaning it can actually be built and taken apart. Everything else is a dead end that looks correct right up until the last board will not drop in.\u003c\/p\u003e\n\u003cp\u003eThe level reads 17.4. Seventeen moves to free the first board, four more for the second.\u003c\/p\u003e\n\u003ch2\u003eMoves That Look Like Nothing\u003c\/h2\u003e\n\u003cp\u003eDe Vreugd noticed a mechanism that keeps turning up in high level puzzles. Boards slide back and forth, apparently getting nowhere, purely to shift one other board a few units across. In Torture it takes seven moves to move a single board three units. Nothing is wasted and nothing looks like progress, which is most of what makes it hard.\u003c\/p\u003e\n\u003cp\u003eIt is also the design that made \u003ca href=\"\/ja\/products\/extreme-torture\"\u003eExtreme Torture\u003c\/a\u003e possible. Torture came first, and once de Vreugd had it he pushed the same search as far as it would go.\u003c\/p\u003e\n\u003ch2\u003eIt Arrives in Pieces\u003c\/h2\u003e\n\u003cp\u003eSix loose boards and the knowledge that they fit. There is no solved state to copy, and with one solution out of 7,680 assemblies there is not much room to guess your way in. Expect to put it down and come back to it.\u003c\/p\u003e\n\u003cp\u003eTorture sits in the middle of the three. If you want all of them, they come together as the \u003ca href=\"\/ja\/products\/separated-board-burr-set\"\u003eSeparated Board Burr Set\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is a separated board burr?\u003c\/h3\u003e\n\u003cp\u003eA standard six board burr has six flat pieces in three pairs. In a separated board burr the two boards in each pair sit one unit apart rather than flush. The gap opens the shape up and allows much longer move sequences. Jim Gooch suggested the idea in 2002, Frans de Vreugd designed the puzzles.\u003c\/p\u003e\n\u003ch3\u003eWhy is Torture so hard to assemble?\u003c\/h3\u003e\n\u003cp\u003eBecause almost every arrangement that looks right is wrong. The six boards form 7,680 assemblies and only one of those is a solution that can actually be built, so recognising the correct arrangement is a real part of the puzzle, not just executing the moves.\u003c\/p\u003e\n\u003ch3\u003eDoes Torture arrive assembled?\u003c\/h3\u003e\n\u003cp\u003eNo. It ships as six separate boards, and assembling them is the challenge.\u003c\/p\u003e\n\u003ch3\u003eIs Torture harder than Extreme Torture?\u003c\/h3\u003e\n\u003cp\u003eNo. Torture is level 17.4, Extreme Torture is level 28-22-9-8-3. Torture is the one to solve first.\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":51411272269991,"sku":"GP-TORT","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/torture_marble.png?v=1790218238"},{"product_id":"packtic-2","title":"PackTIC 2｜回転組木キューブ","description":"\u003cp\u003eSix pieces, twenty-two moves. One of the four graded Hard.\u003c\/p\u003e\n\u003cp\u003eGoal: pack all 6 pieces into the frame to build a complete cube.\u003c\/p\u003e\n\u003cp\u003eRequires 22 moves. Ships assembled.\u003c\/p\u003e\n\u003cp\u003eEvery PackTIC is a Turning Interlocking Cube, so the pieces have to be rotated into place rather than simply pushed. What the series adds is the frame: Andrew describes each one as needing rotations, sliding moves, and thought as to where all the pieces go inside the frame piece.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's special about PackTIC 2?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRotations and sliding moves, not just straight assembly\u003c\/li\u003e\n\u003cli\u003e6 pieces, 22 moves to solve\u003c\/li\u003e\n\u003cli\u003eBuilds serious 3D spatial reasoning\u003c\/li\u003e\n\u003cli\u003ePart of the 10-puzzle PackTIC series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTwenty-two moves is the second longest solve of the ten.\u003c\/p\u003e\n\u003cp\u003eGoing for the whole series? The \u003ca href=\"\/ja\/products\/packtic-collection\"\u003ePackTIC Collection\u003c\/a\u003e has all 10 - buy 9, get 1 free.\u003c\/p\u003e\n\u003cp\u003eDesigned by \u003ca href=\"\/ja\/collections\/andrew-crowell\"\u003eAndrew Crowell\u003c\/a\u003e.\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":51482671939751,"sku":null,"price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/packtic_2___turning_interlocking_cube_marble.png?v=1791465571"},{"product_id":"packtic-3","title":"PackTIC 3｜回転組木キューブ","description":"\u003cp\u003eTwenty-one moves out of six pieces, and a Hard grade to go with them.\u003c\/p\u003e\n\u003cp\u003eGoal: pack all 6 pieces into the frame to build a complete cube.\u003c\/p\u003e\n\u003cp\u003eRequires 21 moves. Ships assembled.\u003c\/p\u003e\n\u003cp\u003eEvery PackTIC is a Turning Interlocking Cube, so the pieces have to be rotated into place rather than simply pushed. What the series adds is the frame: Andrew describes each one as needing rotations, sliding moves, and thought as to where all the pieces go inside the frame piece.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's special about PackTIC 3?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRotations and sliding moves, not just straight assembly\u003c\/li\u003e\n\u003cli\u003e6 pieces, 21 moves to solve\u003c\/li\u003e\n\u003cli\u003eBuilds serious 3D spatial reasoning\u003c\/li\u003e\n\u003cli\u003ePart of the 10-puzzle PackTIC series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTwenty-one moves from only six pieces, so most of the work is in the planning.\u003c\/p\u003e\n\u003cp\u003eGoing for the whole series? The \u003ca href=\"\/ja\/products\/packtic-collection\"\u003ePackTIC Collection\u003c\/a\u003e has all 10 - buy 9, get 1 free.\u003c\/p\u003e\n\u003cp\u003eDesigned by \u003ca href=\"\/ja\/collections\/andrew-crowell\"\u003eAndrew Crowell\u003c\/a\u003e.\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":51482676199591,"sku":null,"price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/packtic_3___pack_3_pieces_into_a_cube_marble.png?v=1791465701"},{"product_id":"packtic-8","title":"PackTIC 8｜回転組木キューブ","description":"\u003cp\u003eThirteen moves - the shortest solve in the series.\u003c\/p\u003e\n\u003cp\u003eGoal: pack all 6 pieces into the frame to build a complete cube.\u003c\/p\u003e\n\u003cp\u003eRequires 13 moves. Ships assembled.\u003c\/p\u003e\n\u003cp\u003eEvery PackTIC is a Turning Interlocking Cube, so the pieces have to be rotated into place rather than simply pushed. What the series adds is the frame: Andrew describes each one as needing rotations, sliding moves, and thought as to where all the pieces go inside the frame piece.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's special about PackTIC 8?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRotations and sliding moves, not just straight assembly\u003c\/li\u003e\n\u003cli\u003e6 pieces, 13 moves to solve\u003c\/li\u003e\n\u003cli\u003eBuilds serious 3D spatial reasoning\u003c\/li\u003e\n\u003cli\u003ePart of the 10-puzzle PackTIC series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe shortest solve in the series by move count.\u003c\/p\u003e\n\u003cp\u003eGoing for the whole series? The \u003ca href=\"\/ja\/products\/packtic-collection\"\u003ePackTIC Collection\u003c\/a\u003e has all 10 - buy 9, get 1 free.\u003c\/p\u003e\n\u003cp\u003eDesigned by \u003ca href=\"\/ja\/collections\/andrew-crowell\"\u003eAndrew Crowell\u003c\/a\u003e.\u003c\/p\u003e","brand":"Greg Puzzles","offers":[{"title":"Default Title","offer_id":51482709196967,"sku":null,"price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2827\/1783\/files\/packtic_8___turning_interlocking_cube_marble.png?v=1791466350"}],"url":"https:\/\/gregpuzzles.com\/ja\/collections\/6-piece-puzzles.oembed","provider":"Greg Puzzles","version":"1.0","type":"link"}