chris_c wrote:A 7 glider synthesis of an

18 bit P2 that just showed up in an

asymmetric soup:

`x = 53, y = 52, rule = B3/S23`

51bo$50bo$50b3o22$32bo$31bo$22bo8b3o$23bo$21b3o4$18b3o$20bo$19bo$23b2o

$22bobo$24bo9$2o$b2o$o$4bo$4b2o$3bobo!

Nice! One of the things I am currently working on is synthesizing all 18-bit P2 oscillators (or at least as many as possible), and this one didn't look easy. I just saw this come up on the twitter feed tonight, and from how it formed, I figured it could be made from 8 (5 gliders for the engine - 2 for traffic light + 3 for butterfly), but I thought I would check here first, to see if anyone had already done so (which you did, and more cheaply). It turns out that the engine, when left to its own devices, forms a common constellation I call "W": a ship, two blocks, and two blinkers. There are dozens of ways to make it from 3 gliders:

http://codercontest.com/mniemiec/20/20shb2b2.rle. This means there are many ways to make this from just 6 gliders, e.g.:

`x = 88, y = 70, rule = B3/S23`

66bo$66bobo$66boo26$33bobo$33boo$34bo$$30bo4boo43b3o$31bo4boo$29b3o3bo

45boboo$80bo4bo$80boo3bo$87bo$83bobobo$83boobbo24$boo$obo$bbo$$4b3o$6b

o$5bo!