David Clamage is known as Rangsk and has his own YouTube channel. He has contributed to the FPuzzles solving tool and has some puzzles on Logic Masters Germany. His first feature on CTC is Nonconsecutive Diagonal. His showcase video provides an insight into how he sets puzzles and can be viewed by clicking the play button in the centre of the video above.
Selecting a sudoku title will allow you to play it, selecting Simon or Mark image next to the title will allow you to watch it.
