Simple NQueen Visualizer in JAVA to Visualize Backtracking

Information:

This is a simple NQueen GUI Problem solver coded in Java. It shows the rows and columns it is currently using and also shows the backtracking movements.

The github repository for this code is,

https://github.com/quickgrid/NQueenVisualization/tree/master

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Visualization 1:

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Visualization 2:

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Code: