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1 | Hidden and naked singles or tuplets. The cells have a yellow background when one single candidate is forced to be true. Simply point on the candidate in order to enter it. Or select the ![]() |
2 | Locked candidates. The cells, where one candidate is forced to be false, have a light-cyan background. To identify this candidate, look at the cells with a light-green background: it is the one which is highlighted with a yellow background. You can safely remove the candidate from the light-cyan cell(s).
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3 | Grid analysis. Same as for Locked candidates.
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4 | Almost Locked Sets. The cells, where one (or more) candidate is forced to be false, have a light-cyan background. To identify this candidate, look at the cells with a light-purple or light-pink background: the candidate is highlighted with a small yellow background. You can safely remove the candidate from the light-cyan cell(s).
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5 | Strong chains. The cells, where one candidate is forced to be false, have a light-cyan background. To identify this candidate, look at the cells with a light-green background. You can safely remove the impossible candidate from the light-cyan cell. See sample.
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Type a letter to display the desired chain. For example, [A] will display the first chain. [C] the third chain, etc. [Z] will display all strong chains. Note that chain nodes are displayed with a circled or rectangular background following their parity.
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