Thanks for sharing your thoughts Harmeet ... do have alook at the theme videos ... each video approximately corresponds to one round of the WSC .... it might give you additional insights into the theme for each round.

The immediate thought to my mind is of Chakravyuh. A sudoku with spiral shaped clues which can be worked onlyl from the outer to clues and end up solving into the center. Not possible to start from the middle of the grid. Very difficult puzzle to break in :)