23-cell quadratic growth #2:
Code: Select all
x = 170, y = 215, rule = B3/S23
169bo$167b2o$168b2o142$8b3o$9bo$8bo61$40bo$39bobo$4bo35bo$3bo$2b2o$o2b
o$obo$bo!
(wasn't sure which thread to put this in so it went here)
EDIT: Hotdogpi noticed the generation 1 could have its switch engine replaced, so now we have
22-cell quadratic growth, beating the record:
Code: Select all
x = 170, y = 216, rule = B3/S23
168bo$167bo$167b3o141$9bo$8b3o$10bo62$40bo$39bobo$40bo$2b3o$o$bo$2bo$b
o$o!
EDIT2: You may notice there's a tub in the pattern instead of a block or blinker, which would take another cell off. Sadly I can't quite seem to get one of those - which would yield a 21-cell quadratic growth - to work. Here's all of the spots I've tried blocks/blinkers with apgsearch-stdin:
Code: Select all
x = 280, y = 245, rule = LifeHistory
279.C$277.2C$278.2C28$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B
$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.
65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$
155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.
65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$
155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.
65B$155.65B$155.65B$155.65B$155.65B$155.65B$155.65B$85.120B$85.120B$
85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.
120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$
85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.
120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.120B$85.135B$
85.135B$85.135B$85.135B$85.135B$55.165B$55.165B$55.165B$55.165B$55.
165B$55.165B$55.165B$55.165B$55.165B$55.165B$55.165B$55.165B$55.165B$
55.165B$55.165B$55.165B$55.165B$55.165B$55.165B$55.63B3C99B$55.64BC
100B$55.63BC101B$55.165B$55.165B$55.165B$205B$205B$205B$205B$205B$
205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B
$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$
205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B
$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$205B$
114BC90B$113BC126B$112B2C126B$110BC2BC126B$110BCBC127B$111BC128B$240B
$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$
240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B$240B
$240B$240B!
Note that I didn't try 4-cell patterns against all of this search space, because the pattern with the tub is already in such a position where it doesn't expand the bounding box by any amount.
EDIT3: For a much less consequential discovery, a second
puffer with a pentadecathlon in its exhaust turned up:
Code: Select all
x = 68, y = 93, rule = B3/S23
33bo2b3o2b2o$31b3ob2ob2o2b2o$31bo3bo2bobo3bo$31bo2bo3bo2b2ob2o$33b4obo
b3o2bo$35b5obo2b3o$32b4o2bobo2bo$31b4o3bobo4bo$31b2ob2obob4ob3o$31b2o
4b2o3bob2o$32bob2ob3obob4o$31b3obob2ob3obobo$31b2o2bo2bob3o3bo$31bob3o
b5obo2bo$36b2obo2bob3o$33bob2o3bo2bo2bo11$64bo$61b2o$61b2ob2o$63bo$61b
2o2$62b2o2$65bo$62bobo$63bo2b2o15$4b2ob3o5bo$4b2ob4obobo$o2bo3b2obo4bo
$o3bo2b3obobo$obobo3bo2b3o$b2ob2o2b4obobo$6bob3o3b2o$3o6b2obobo$2bobob
5obo$o2b6o2b3obo$b2o2bo3bobo2bo$3b2ob4ob3obo$o6bobo3bobo$4ob4o5bo$ob2o
2b2o2bobob2o$2bob2o2bo2b3o9$30b3o$30bo$30b2ob2o$32b3o$32b3o3$32b3o$35b
o3$29bo3bo$33bo3bo$31bo$31b2o2$31b2ob2o$33bo!
EDIT4: Expanded the search area greatly (and updated the above field to reflect this) but it only found a single configuration where both engines survive, and just produces an ordinary yl1152.
EDIT5: I thought of another potential design for a smaller-bounding-box 22CQG:
Code: Select all
x = 140, y = 140, rule = LifeHistory
140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B
$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$
140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B
$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$
140B$140B$140B$140B$140B$140B$81BC58B$79B2C59B$78BC61B$78BC61B$78BC
61B$140B$140B$140B$140B$140B$140B$88BC51B$86B2C52B$87BC52B$140B$140B$
140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B
$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$71B2C67B$70BC69B$
71B3C66B$140B$73B2C65B$74BC65B$140B$140B$140B$140B$140B$140B$140B$
140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B
$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B$140B!
Unfortunately, no placement of a block or a blinker in the blue box becomes quadratic.