Glad to see this back in the current threads.

Nowadays the highest difficulty level takes me approximately 30 minutes with gusts down to 12. On the lowest level, I have conquered it in 2 minutes, 12 seconds. OW! I think I just twisted my arm, patting myself on the back.

My sister got a fancy Sudoku set for Christmas. It is made of wood and has little drawers in either side of a wood box with stacks of wooden number tiles. It also has smaller tile, a quarter the size of the larger ones to act as temporary guesses or non-eliminated numbers which corresponds to the paper and pencil solvers' dilemma. The top has the 81 squares with raised ridges to keep the tiles in place.

Keep solving!