Tag Archives: Sudoku BARN

An XY Playground in Classic 72

Posted on March 12, 2019 by

James Forest’s Classic 72 delivers two rare birds, then gets tripped up by a Y-wing. The bypass threatens to take over, but leaves  an XY playground.       The line marked grid gives all of the Sysudoku Basic results. … Continue reading →

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Books 3 and 4 In the KD Insane Review

Posted on January 1, 2019 by

Welcome to 2019 Systematic Sudoku. This post continues on the updated KrazyDad v4 review, with KD Insane 435 and 445. This is a brief report on what you’ll find in the updated posts of August 2013. The review update begins … Continue reading →

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LPO Knocks Out World’s Hardest 36

Posted on May 29, 2018 by

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 →

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Andrew’s Solver Tames Worlds 200

Posted on May 15, 2018 by

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 →

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The World’s Most Over-Titled Sudoku Book

Posted on May 1, 2018 by

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 →

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A WXYZ vs. BARN Settlement

Posted on April 10, 2018 by

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 →

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Djape’s Hard Sudoku

Posted on March 15, 2016 by

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 →

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