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Monthly Archives: March 2017
BV Scan Satisfaction in Saturday 2
This post continues the visit of Sudoku Satisfaction readers to Sysudoku with a tour of advanced method principles applied in a Sysudoku solution of Satisfaction’s Saturday 2 puzzle. The roles of Rick Seemel’s Solution Rectangles I – IV in the … Continue reading
Posted in Advanced Solving, Expert Reviews
Tagged irregualr XYZ-wing, Richard Seemel, Sudoku Satisfaction, sue-de-coq, X-wing, XY-chain, XYZ map
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Touring the Bypass and a Human Engineered Inscription
This post continues the visit of Sudoku Satisfaction readers to Sysudoku with a demonstration of the slink marking bypass, line marking inscription, and basic subset spotting. How was lunch? . . . Good. OK, we’re ready to continue. Here is … Continue reading
Posted in Basic Solving Procedures, Expert Reviews
Tagged box marking, box/line, bypass, line marking, Richard Seemel, Sudoku Satisfaction
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The Sudoku Satisfaction Tour
In the next three posts, I introduce Sudoku Satisfaction by Richard Nicholas Seemel, by inviting sysudokies to attend a tour for Satisfaction readers. The tour will highlight differences between two systems that agree on basic solving approach, but not on … Continue reading
A Closing ALS Postscript on THLS
This post demonstrates ALS-XZ as an alternative to hidden XY chains, and concludes the review of The Hidden Logic of Sudoku by Denis Berthier. In THLS, Denis goes outside the Royles 17 collection only a few times for illustrative examples. … Continue reading
Posted in Advanced Solving, Berthier, Expert Reviews, Extreme Solving
Tagged ALS-XZ, Denis Berthier, Gordon Fick, The Hidden Logic of Sudoku, UR Type 2, XY-chain, xyt-chain
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