Monthly Archives: May 2015

Wex 434 Hidden UR, AIC, Trap, Boxline Wrap

Posted on May 26, 2015 by Sudent

Beeby finds S5 naked single in the bypass, but that requires unproductive number scanning. Naked singles don’t escape Sysudoku Basic. This one shows up in line marking, when r9c4 sees 4 and 9. After line marking, with r5 completed, A … Continue reading →

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Wex 432 fails, but not 433

Posted on May 19, 2015 by Sudent

A hidden unique rectangle appears in line marking close. Then an attempted 132-wing fails because there are too many 2-candidates around. It fails as a 3-BARN because more than one value is restricted to a single unit. The ALS_19 brings … Continue reading →

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Wex 431 ALS_XZ, 3-BARN, Merge Wrap

Posted on May 12, 2015 by Sudent

Beeby finds ALS_53 and ALS_67 as line marking ends. The latter is duplicated by a regular XYZ-wing. and enough slinks for two clusters. The XY ANL that is going to expand the red/orange cluster is also a 3-BARN. Before the … Continue reading →

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Gordon Fick Tricks More Extreme 200

Posted on May 5, 2015 by Sudent

This post reports an alternative solution, without my pattern analysis, to Antoine Alary’s special More Extreme 200, based on a Sysudoku reader’s innovative use of a little known technique, the double common ALS pair. Two ALS sharing two restricted common … Continue reading →

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