Griddlers Tutorial - Solving Puzzles

Example 1: A Simple Puzzle   Example 5: Complex Logic (b)
Example 2: A Triangle Puzzle   Example 6: Color Elimination
Example 3: Multi Line Solving   Example 7: Complex Color Logic
Example 4: Complex Logic (a)   Example 8: More Color Logic

Example 4: Complex Logic (a)

Here is an excellent example of a more complex type of logic.

First, fill in as much of the puzzle as you can using simple logic.
That's not very much. :-)
Now let's look at the square circled in green.
We can see by the column clues that it must be either in a group of "1" or a group of "2".
Let's see what the two possibilities would look like.
This is what the puzzle would look like if that square is a "1" clue.
This is what the puzzle would look like if that square is part of clue 2. You can see we would have to put 3 single squares below the group of two and this is the only possible formation.
You can see that either way the square marked with a red dot must be in white.
Example 1: A Simple Puzzle  |  Example 2: A Triangle Puzzle  |  Example 3: Multi Line Solving
Example 4: Complex Logic (a)  |  Example 5: Complex Logic (b)  |  Example 6: Color Elimination
Example 7: Complex Color Logic  |  Example 8: More Color Logic
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