Point the cursor over the column you wish to drop your piece in.

Left click to drop your piece.

When you can connect four pieces vertically, horizontally or diagonally you win

If you focus too much on winning, you might lose sight of the clear and present danger of losing." - Yeo Khoon Leong 

So, slow down and chill, learn to adjust your depth of view to see both sides - a lesson taught in Unlock the Yijing Secrets: Art of Manuevering coaching program.