Thanks for the answer! I hope then to see you in CASP (and CAMEO too, it is a great tool to test/refine your method). I was discussing a paper with a co-worker of mine (we also work on psp, we work on RBO Aleph). We had a hard time pinpointing the thing that made your method finally work. You have mentioned in your blog post that you have been working on it for years now, and I guess a lot of other people had the idea of using deep learning for psp. But what was the insight that made it all work, using LSTM? or was it many small refinements and hacks?