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Tag Archives: Sudoku BARN
LPO Knocks Out World’s Hardest 36
A challenge posed by The Worlds Hardest Sudoku Book 36: Is there a route to the solution less advanced than pattern analysis? The puzzle is otherwise distinguished by a BARN right out of line marking, and a notable lack of … Continue reading →
Andrew’s Solver Tames Worlds 200
This post walks through the “very hard” part of the solution path taken by Andrew Stuart’s Solver through puzzle 200 of The World’s Hardest Sudoku Book by authors unknown. This is a remarkable turn of events for a blog devoted … Continue reading →
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
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Tagged AIC ANL, color wrap, freeform pattern analysis, single patterns in one color, Sudoku BARN, World's Hardest, X-chains, XY-wing
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A WXYZ vs. BARN Settlement
In this post, progress is reported on the Sysudoku Guide, and on a possible territorial agreement between the WXYZ wing and the Bent family. The Guide, that link up there on the menu bar, is taken shape. The Basic pages … Continue reading →
Posted in Advanced Solving, Expert Reviews, Hanson
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Tagged iWXYZ, Robert Hanson, StrmCkr, Sudoku BARN, Sysudoku Guide, WXYZ-wing
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Djape’s Hard Sudoku
This is a single post review of a book of very few words, Djape’s Hard Sudoku Book. The book is a good size, the paper is good quality, and grids are clearly printed, with adequate margins. There’s no commentary inside, … Continue reading →
How the BARN Was Built
This post continues a report on the discovery of a practical human solving technique and the need to have it properly classified and named. This method has been credited to its author, known by his forum moniker as StrmCkr, on … Continue reading →
Posted in Advanced Solving, Expert Reviews, Stuart
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Tagged Andrew Stuart, bent almost restricted N-set, bent naked n-set, BNS0, BNS1, SrmCkr, Sudoku BARN, WXYZ-wing
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Longo’s Nastiest Ever Collection
This post begins the review of Frank Longo’s The Nastiest Sudoku Book Ever with a review table and solving highlights of two review puzzles, Nastiest 607 and 629. The original post was revised to correct errors found by my backup … Continue reading →
Posted in Advanced Solving, Longo, Puzzle Reviews
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Tagged bent naked n-set, Frank Longo, Nastiest Sudoku Ever, Sudoku BARN, Sudoku BNS, unique rectangle, WXYZ-wing
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