{"product_id":"the-big-book-of-logic-puzzles-masyu-400-hard-volume-17-9781544164205","title":"The Big Book of Logic Puzzles - Masyu 400 Hard (Volume 17)","description":"Masyu is a type of logic puzzle designed and published by Nikoli. The purpose of its creation was to present a puzzle that uses no numbers or letters and yet retains depth and aesthetics.Masyu is played on a rectangular grid of squares, some of which contain circles, each circle is either \"white\" (empty) or \"black\" (filled). The goal is to draw a single continuous non-intersecting loop that properly passes through all circled cells. The loop must \"enter\" each cell it passes through from the center of one of its four sides and \"exit\" from a different side, all turns are therefore 90 degrees. The two varieties of circle have differing requirements for how the loop must pass through them: -White circles must be traveled straight through, but the loop must turn in the previous and\/or next cell in its path.-Black circles must be turned upon, but the loop must travel straight through the next and previous cells in its path.\u003cbr\u003e","brand":"Createspace Independent Publishing Platform","offers":[{"title":"Default Title","offer_id":50355597017362,"sku":"9781544164205","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_3c5c712c-057d-45f7-b4a6-e923a5d1d8aa.jpg?v=1728300703","url":"https:\/\/surprise-castle.myshopify.com\/products\/the-big-book-of-logic-puzzles-masyu-400-hard-volume-17-9781544164205","provider":"Surprise Castle","version":"1.0","type":"link"}