Simple Rules
You can follow a few simple rules:
- The solution will not have open ends or loops.
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Starting from the edges, for example:
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A cross must have all adjacent blocks pointing to it:
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Remember the blocks which you are certain about their orientations, for example:
The highlighted block can have a number of different orientations:
But if you know that the orientation of the bulb is correct, the highlighted block can only be oriented as follows:
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