when I was messing around controlling mustrum 2.1.1 vs. vianiato a few days ago, i think i may have found a way to keep mustrum unbreakable after its already been broken once. ok, after vianiato's 1337 book broke mustrum on the 4 (red start) then via moved 1 (second move) and down the line, at the end of the game i found out that vianiato's 1337 book broke mustrum 2.1.1 / then i toy'd around with mustrum 2.1.1 's settings and looked at its books (depp book, and wide book) and saw user book. i clicked it and reset the game. i kept trying to make vianiato move row 1 on first move, and the first 9 turns were the exact same, but i noticed after 10 turns back and forth, mustrum wasnt unbreable anymore. :O hopefully someone can give me a good explanation :| thanks, .v1n.