Oh look, it's my kakuro :D nice solve, i think the only thing that could have sped up things a little bit was the 6 in R3, because a 7 there would break the 79 pair in the 24 clue. The puzzle is really tough, especially for a competition, and we were not sure whether we should include it. We did in the end, but I also added three redundant clues to make it a tiny bit less brutal: You can delete the 14 in R4, the 29 in R7 and the 16 in R8 to get the original version ;)