Neighbours Help
Rules / Objectives Summary
- Complete the grid such that every row and column contains every number exactly once.
- The symbols on the grid indicate neighbours (e.g. 1 >< 2, 3 >< 4, 2 >< 1).
- Rule 1 - a symbol between = the numbers are neighbours.
- Rule 2 - NOT a symbol between = the numbers are NOT neighbours.
See the Walkthrough or Notes for extra information.
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What are the symbols for? The symbols are double arrows that point to two numbers that are neighbours of each other.
e.g. 1><2, 3><2, 3><4.
Move your mouse over the puzzle to see the answer. |

 Walkthrough


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Step 1 This is the start of the puzzle.
Solve this puzzle for yourself at the same time.
This example highlights the importance of the lack of a neighbour symbol.
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Step 2 Because the <1> has no neighbour symbols, these squares in this row cannot be <2>.
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Step 3 Because neither <1> has a neighbour symbol, these squares in this column cannot be <2>.
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Step 4 Because the <2> has a neighbour symbol, this square must be either <1> or <3>. However, there is already a <1> in both the row and column, therefore this square is the <3>.
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Step 5 This row and column can now be completed.
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Step 6 As neither the <2> nor the <4> has a neighbour symbol, these squares cannot be <3>.
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Step 7 This square cannot be <4>, and the row can be completed.
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Step 8 There is already a <4> in this row, so the <4> for this column can't go in this square, and the column completes.
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Step 9 Because the <1> has no neighbour symbol, this square cannot be <2>. The puzzle quickly completes.
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Step 10 the completed puzzle.
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 Notes


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Note 1 This square has to be <3> because of the neighbour symbol next to the <4>.
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Note 2 This square CANNOT be <3> because there isn't a neighbour symbol next to the <4>.
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Note 3 Because of the given <2> and the neighbour symbol, A can only be <1> or <3>.
Therefore B could be <2> or <4> - however, B can't be 4 as the <5> has no neighbour symbol.
So B must be <2> (and A is either <1> or <3>).
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