Monthly Archives: November 2012

Cell Forcing Chains

Posted on November 27, 2012 by Sudent

Here we examine forcing chains starting from all candidates in a cell.  When the number of chains is 2, there is nothing new.  Above that,  there is a new strategy to explore, which rivals LPO in complexity, but falls behind … Continue reading →

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Nishio Forcing Chains?

Posted on November 20, 2012 by Sudent

 Resuming the series on forcing chains, this post reveals that the Nishio forcing chain introduced on Andrew Stuart’s sudokuwiki site  is yet another re-interpretation of the AIC toxic set, a.k.a. the eliminating almost nice loop(ANL).  Here we also assert that … Continue reading →

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The 2012 Akron Sudoku Tournament

Posted on November 12, 2012 by Sudent

I have to interrupt my review of forcing chains to celebrate the hugely successful, first time Sudoku tournament put on by my hometown Akron-Summit County Library.  Upwards of 50 solvers enjoyed three 20 minute rounds, followed by an exhibition of … Continue reading →

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Digit Forcing Chains?

Posted on November 6, 2012 by Sudent

Is Andrew Stuart’s Digit Forcing Chains a useful new solving technique? Actually, no.  Andrew’s  sudowiki site introduces digit forcing chains with examples that raise – and seem to settle – that question. Needless confusion is created by this unwarranted introduction. First, have you … Continue reading →

Posted in Advanced Solving, Expert Reviews, Stuart, Uncategorized | Tagged , , , , , , | 2 Comments