Tag Archives: ANL test

Paul Stephens’ Extremes Review


Here we review as one collection the “extreme” puzzles in Paul Stephens’  two current books, Mastering Sudoku Week by Week and The Sudoku Addict’s Workbook. In Stephens’ Weeks, puzzles for weeks 26 through 52 are labeled “Extreme”.  By this, Paul … Continue reading

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The ANL Test


A review of Paul Stephens’ books continues here with my discovery that his Nishio procedure,  when properly applied,  can be a practical X-panel analysis technique to uncover obscure grouped almost nice loops (ANL).  I propose calling it “the ANL test”. … Continue reading

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To Nishio or Not to Nishio


This post examines Paul  Stephens’ favored form of Nishio, from his two current books on advanced Sudoku solving.  The analysis of the Addicts 140 determines the relationship between Stephens’Nishio and a simple test for grouped almost nice eliminating loops on … Continue reading

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