Trial & Error

Trial & Error is a solving technique of last resort. A digit is placed into a cell and the implications for this placement are examined. When a contradiction is found, the trial candidate is eliminated.

There are several techniques related to Trial & Error:

Bifurcation

The trial candidates are restricted to constraints with only 2 candidates left.

Nishio

Only candidates for a single digit are taken into consideration.

Tabling

All candidates are examined this way without any prior selection.

Guess

When the placement leads to the solution, alternatives are not verified.

This page was last modified 23:24, 29 October 2006.  

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