`x = 33, y = 86, rule = B35j_S23`

12b3o3b3o$11bo3bobo3bo$15bobo$10bo4bobo4bo$10bo11bo$10bo3bo3bo3bo$11b

3o5b3o5$11bobo5bobo$11b3o5b3o$12bo7bo4$6bo$5b3o$4bo3b2o$3b2o4bo7b3o$2b

3o2bo2bo6b2o$9b2o6b2o$9b2o$8b3o4bo$8b2o5b3o$16b2o3$12b3o3b3o9b2o$12bob

o3bobo9bobo$11bo2bo3bo2bo9b2o$11bobo5bobo$11b3o5b3o2$9bo13bo$9bo13bo$b

2o8bo9bo$obo7b2obo5bob2o$2o9bo2bo3bo2bo$12b2o5b2o5$30b2o$30bobo$5b4o5b

o4b2o10b2o$4bo2b2o3b2o5b2o$3bo5bo9bo$4bo2b2o9bo$5b2o8bobo$6bo2bo4b2obo

$b2o4bobo4b2obo$obo5bo5b4o$2o13b2o3$12b3o3b3o$11bo3bobo3bo$15bobo$10bo

4bobo4bo$10bo11bo8b2o$10bo3bo3bo3bo8b2o$11b3o5b3o5$11bobo5bobo$2o9b3o

5b3o$2o10bo7bo2$9b2o3b2ob2o3b2o$8bobo3b2ob2o3bobo$7b2o5b2ob2o5b2o$23b

2o$14b2ob2o4bo$14bo3b5o8b2o$13b2o4b3o9b2o$4b2o14bo$2bo$6bo$2b2o3bo4bo$

3b2o7bo$4b3o!

EDIT: And reduction of the other half of the backrake:

`x = 171, y = 120, rule = B35j_S23`

18bo5bo27bo5bo$17b3o3b3o24b2ob2ob2ob2o$17bobo3bobo24b2ob2ob2ob2o$16bob

o5bobo24b2o5b2o22b3o3b3o25b3o3b3o26bo5bo$17bo7bo23b2ob2o3b2ob2o19bo3bo

bo3bo24bobo3bobo24b2ob2ob2ob2o$17bo7bo23b2ob2o3b2ob2o23bobo27bo2bo3bo

2bo23b2o7b2o$13bo15bo21bo7bo20bo4bobo4bo22bobo5bobo24bo7bo$13bobo11bob

o50bo11bo22b3o5b3o21bo3bobobobo3bo$50bo9bo19bo3bo3bo3bo53bobo11bobo$

14b3obo5bob3o22bo7bo21b3o5b3o21bo13bo18bo15bo$16b2obo3bob2o86bo13bo19b

2o11b2o$18bo5bo24bo2bo5bo2bo53bo9bo23bob2o3b2obo$50b3o5b3o53b2obo5bob

2o23b3o3b3o$115bo2bo3bo2bo$81bobo5bobo24b2o5b2o$81b3o5b3o$82bo7bo$18bo

$17bo3b2obo5b2o12b3o$17bo6bo4b2ob2o9bo3bo10bo92bobobo$18bo5bo7b2o8bo2b

ob2o8bo38bo53bo6bo$19bo8b3ob2o8bo3bobo7b2o37b3o11b4o5bo4b2o26bo4b2o5b

3o$20bobo8bo10bo4b2o44b2o3bo9bo2b2o3b2o5b2o21bo5b4o6b2obo$21b2o5b3o17b

o6bo2bo24b3o7bo4b2o7bo5bo9bo22bo15bo2bo$20bo3bo3b3o13bo3bo4bo4bo25b2o

6bo2bo2b3o7bo2b2o9bo39bobo$21bo2bo23bo6bo28b2o6b2o15b2o8bobo32b2o5b3o$

21b2o24bo7b2o35b2o16bo2bo4b2obo31bo2bo$87bo4b3o16bobo4b2obo32b3o$6b2o

77b3o5b2o17bo5b4o36bo$5bobo77b2o32b2o14bo$5b2o59bo3b3o61bob5o$65bob2o

64b2ob4obo$65b4o65bo$67bo4bobo60b2o2bo3bo$75bo60bo6bo$71bo3bo66bo$71bo

3bo$75bo$72bo2bo92b2o$73b3o92bobo$169b2o4$6b2o$5bobo58b2o$5b2o58bo2bo$

66bobo$67bo6$168b2o$168bobo$16b3o3b3o144b2o2$16bo2bobo2bo$17b3ob3o$6b

2o6bo11bo$5bobo5b4o7b4o38b2o$5b2o6bo3bo5bo3bo16b3o3b3o12bo2bo$43bo3bob

o3bo12bobo$15b3o5b3o21bobo17bo$42bo4bobo4bo$42bo11bo$42bo3bo3bo3bo$43b

3o5b3o$14b2ob2o3b2ob2o$15bobo5bobo142b2o$16bo7bo143bobo$169b2o$30bo12b

obo5bobo18bobo$28bo2bo11b3o5b3o21bo75b3o3b3o$27bo16bo7bo18bo3bo75bobo

3bobo$6b2o10bo7bo5b2o37bo3bo75bo2bobo2bo$5bobo10b2o6bo3b2o2bo31b2o7bo

78bobo$5b2o13bo4b2obo3bobo30bo2bo3bo2bo72b2o4bobo4b2o$19bo5b3o5bo4bo

27bobo4b3o71b2o13b2o$37b3o27bo52b3o3b3o21bobo5bobo$20bo15bo3b2o78bobo

3bobo21bobo5bobo$21b2o12b2o4bo7b3o68bo2bobo2bo22b2o5b2o$34b3o2bo2bo6b

2o72bobo$41b2o6b2o38b3o3b3o19b2o4bobo4b2o$6b2o33b2o45bo3bobo3bo17b2o

13b2o$40b3o4bo44bobo24bobo5bobo38b2o$3bob3o32b2o5b3o37bo4bobo4bo19bobo

5bobo19b2ob2o3b2ob2o6bobo$2bobo43b2o37bo11bo20b2o5b2o20bo3bo3bo3bo7b2o

$bo85bo3bo3bo3bo50b3o5b3o$bo3b2o81b3o5b3o$65b3o$bo2bob2o56bo3bo$o2bo2b

2o55bo4bo92b2o3b3o$b2o3b2o56bo2bo53b2o3b2o25b2o6b2o3bobo$6bo81bobo5bob

o53bo2bo5b2o2bo3bo$67b2o19b3o5b3o16bo6b2ob2o26bo7bo4b2obo$63bo3b2o20bo

7bo16bo2b2obo2bo2b2o3bobo27bo5b2o$64bo2bo45bo3b3o11bobo27bo$65bo20b2o

3b2ob2o3b2o13bo3b2o12bo$85bobo3b2ob2o3bobo13b7o$84b2o5b2ob2o5b2o15b2o

5bo$100b2o21b2o43b2o$91b2ob2o4bo18b5o44bobo$91bo3b5o20b2o18b2o27b2o$

90b2o4b3o21bo13b2o3bo2bo$97bo35b3o2bo3b2o$134bob3o3bo$137b2o3bo$89bo

46b2o$79b2o2b2o4bo$81b3o2$72bobo$75bo$71bo3bo$71bo3bo$75bo$72bo2bo$73b

3o!