Grouped Coloring

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Grouped Coloring is a single digit solving technique which allows multiple candidates to the same digit to be included in a coloring pattern.

  A A
B / /
B / /
/ / /
     
     
B B  
/ / A
/ / A
/    
/    
/    
     
     
     
     
     
     
A / /
A / /
  B B
     
     
     
     
     
    X
Specific patterns for grouped coloring
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