Hrqls: Well, this has already been solved, there are many variations of wipeouts in move #9 and it is not possible to do it earlier. Look at this: http://samsoft.org.uk/reversi/. Click on the 'Wipeouts' item in the top left. I actually lost to '9 move wipeout perpendicular #1' once (that doesn't count, I was a beginner), but, and I am still ashamed of it, I also once lost to '19 move wipeout #1'. And that was after several thousad games :o(