Solving Black And White: (Edge Connection)

One of the fundamental techniques of solving a Black And White puzzle which most beginners would not know is this edge rule. If two circles of the same colour are placed at an edge/corner, they must be connected along an edge.

Take a look at Puzzle No.37


You may be wondering how to start this puzzle!


Have a look at the marked circles. Both are black and placed at an edge/corner.


They have to be connected along an edge, which always gives two possibilities (two directions), marked in red and blue.


The connection along the red line is not possible due to the presence of the white circle. Hence the connection has to be made along the blue line. Pretty cool, isn't it? Now the puzzle is a piece of cake.


Using the 2x2 rule, you can place the three white circles. Now observe the circle at R3C2. It has to connect with other white circles and there is only one possible way, marked in red.


Using your brains and the rules, you should easily reach this situation.


And finally, with a small ending funda, complete it.

Now, looking back, did you realise how easy this puzzle becomes when you use this edge rule? I'm sure you will find Black And White puzzles very easy to solve now :-)

Other Solving Techniques