Reverse Synthesis

[knightlife]

Two gliders can delete a single bit, turning a boat into a tub:

Code: Select all

x = 11, y = 13, rule = B3/S23
6bo$5bobo$6b2o5$8b2o$8bobo$8bo$2o$b2o$o!

[hkoenig]

Similar to this one by David Buckingham:

Code: Select all

x=10, y=8
bo$obo3bo$b2ob2o$5b2o2$7b3o$7bo$8bo!

[knightlife]

eater to boat uses single glider to convert:

Code: Select all

x = 8, y = 6, rule = B3/S23
4bo$4b3o$7bo$3o3b2o$2bo$bo!