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Tag Archives: XY-wing
Wrapping Up Nakamoto Extreme With 183
This post completes the review of the Nakamoto Extreme collection. The review table follows the finish of Nakex 183. A Sudokuwiki assisted solution of Nakex 183 continues with the second APE triggered by the first’s removal of 8r2c9. In this one, … Continue reading
Brian Challenger’s Super Fiendish 7
The review of Challenger’s Super Fiendish collection opens with a long post, revisiting some advanced methods not seen here recently. Somewhat fiendish is the stonewalling in basic. The bypass gets nowhere, and the hidden triple alone removes candidates. Here is … Continue reading
Posted in Advanced Solving
Tagged Brian Challenger, finned X-wing, hidden triple, Super Fiendish Sudoku, XY ANL, XY-wing
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Funster Extreme 60 and 74 Go Together
Two brief advanced appearances are reported in this post in review of the Extreme section of Charles Timmerman’s Funster Hard to Extreme Sudoku. In Extreme 60, the bypass starts with a 3-fill and uses them to solve a big wedge. … Continue reading
Decoding Hodoku Chain Notes
This post comments on the first part of the Hodoku “Chains and Loops” page. It reveals the premise dependent view of chains to be based on computer coding, and unsuited for human solving advice. It explains Hodoku’s chain notations as … Continue reading
Posted in Expert Reviews, Hobiger
Tagged AIC, Bernhard Hobiger, forcing chains, Hodoku, irregualr XYZ-wing, XY-wing
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Hodoku’s Limited XYZ Wings
In this post reviewing the Hodoku Wings page linked under Techniques, we see how an expert programmer can go wrong in explaining how to recognize where a technique applies and why it works . The omission of irregular wings is … Continue reading
Posted in Advanced Solving, Expert Reviews, Hobiger
Tagged ALS Sue de Coq, Hodoku, irregualr XYZ-wing, W-wing, XY-wing, XYZ-wing
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