A (g1y1) g3-
build g1
move g1 to B (b2)
build g1 at A
move g1 to C (g2)
build g2 at A
factory; build g2g3 at B
trade for y3
factory; build y1y1
sac y3; move y1 to D (b1); move y1 to E (b1); move g1 to F (b1)
factory; build y2y2 at D
factory; build y2y3 at E
sac y3; move y2 to G (r2); move y2 to H (b2); move y2 to I (b3)
factory; build g3g3 at B
factory; build y3y3 at D
trade y1 for r1 at D
factory; build r1r1 at D
sac y3; move r1 to J (b3); move r1 to K (b3); move r1 to L (b2)
factory; build y1y3 at D
sac y3; move g3 to M (r3); move g3 to N (r3); move y1 to O (r2)
factory; build r2r3 at L
factory; build y3y3 at D