{"product_id":"modus-fortis-sudoku-logic-sudoku-reason-9781684982233","title":"MODUS FORTIS Sudoku Logic, Sudoku Reason","description":"\u003cp\u003eModus Fortis represents a Khunian shift in Sudoku strategy. Using just four basic tactics that give rise to just two molecular structures--Doubles and Pairs--that evolve into just two Families of complex structures (Exclusive Sets and Forbidden Sets) is all that is needed to solve every Sudoku. But just as E = mc2 is easy to visualize, there is a bit more to understanding the equation. The logical principle that drives the Solution Process is the Exclusive Disjunction: the Modus Fortis. This, combined with the Pairing Principle, guides the Sudoku-ka through the process of constructing a Solution from emerging Sets of Digits, identifiable as structural patterns. A concise notation system allows for recording every significant event in the Solution Process, just as in chess. Richly illustrated, this is a readable book for all levels of interest.\u003c\/p\u003e\u003cbr\u003e","brand":"Newman Springs","offers":[{"title":"Default Title","offer_id":50903969628434,"sku":"9781684982233","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_dad5bca1-f38e-443c-8863-336d40876c43.jpg?v=1738508002","url":"https:\/\/surprise-castle.myshopify.com\/products\/modus-fortis-sudoku-logic-sudoku-reason-9781684982233","provider":"Surprise Castle","version":"1.0","type":"link"}