Remote Pair

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Remote Pair
The Remote Pair technique uses the same principle as the Naked Pair technique. In the example below the red lines indicate some Naked Pairs. Because the Naked Pairs can be chained we can prove that the cells A1 and B2 are also a Naked Pair.

When A1 has the value 1, A2 has the value 4, B1 has the value 1 and therefore B2 must have the value 4.
When A1 has the value 4, A2 has the value 1, B1 has the value 4 and therefore B2 must have the value 1.

When we simplify this we can say that when A1 has the value 1, B2 must have the value 4. Because of this, we can say that the blue cell can not be a 1 or a 4. These candidate values can be removed.
RemotePair