#N x66 #O Hartmut Holzwart #C A period 4 speed c/2 orthogonal spaceship found in July 1992 via a #C search for spaceships containing cells with no more than 6 alive neighbours. #C www.conwaylife.com/wiki/index.php?title=X66 x = 9, y = 11, rule = 23/3 2bo6b$2o7b$o2b3o2bo$o4b3ob$b3o2b2ob2$b3o2b2ob$o4b3ob$o2b3o2bo$2o7b$2bo !