Tag Archives: AIC ANL

Sudokuwiki Ends Nakex 63 On Its Own


This post picks up on the Sudokuwiki/Sysudoku resolution of Nakamoto Extreme 63 where it was overtaken by pattern analysis and coloring, and finishes it in two ways, one humanly practical and one not. Sudokuwiki doesn’t maintain coloring clusters between moves, … Continue reading

Posted in Extreme Solving, Nakamoto, Puzzle Reviews | Tagged , , , , , , , , | Leave a comment

World’s 36 and 200 Basic, and More on 25


In this post, checkpoint traces on World’s Hardest 36 and 200, and a direct comparison with  two Strmckr solutions to Worlds 25. Also, a Gordon Fick contribution to the cause. Here is Strmckr’s first solution, right out of line marking. It’s … Continue reading

Posted in Advanced Solving, Expert Reviews | Tagged , , , , , , | Leave a comment

The World’s Most Over-Titled Sudoku Book


This post starts the review of World’s Hardest Sudoku Book, tracing Very Hard 25, the only one rated a 1.00. The review will cover the highest rated 10, taking the rating down to 0.90. The lowest of the 200 is … Continue reading

Posted in Advanced Solving, Puzzle Reviews | Tagged , , , , , , , | Leave a comment

Bean Gets No Second Extreme


This post describes how I-41, in Extremely Hard v. 10 by Rebecca Bean comes close, but fails to force a deferred Single Alternate Sue de Coq trial. It does force a review of AIC hinges and grouped forcing chains. An update … Continue reading

Posted in Advanced Solving, Puzzle Reviews | Tagged , , , , , , | Leave a comment