gmc_nxtman wrote:Note that things like
this are also "eater2 precursors"...
Well, they're eater precursors, anyway. And as
codeholic mentioned the last time this came up, it's a kind of eater that could be used in place of the eater2 in the syringe for example.
They're technically not eater2 precursors, though. To count as an eater2, an object really has to be able to eat gliders on four adjacent lanes:
Code: Select all
x = 52, y = 26, rule = LifeHistory
23.A26.A$22.A26.A$22.3A24.3A$19.A26.D$18.A26.D$18.3A24.3D$15.A26.D$
14.A26.D$14.3A24.3D$11.A26.D$10.A26.D$10.3A24.3D5$27.A$3.A.2A21.A4.A$
.3A.2A19.3A2.3A$A29.A$.3A.2A23.3A.A$3.A.A27.2A$3.A.A24.2A$4.A26.A.2A$
31.A2.A$32.2A!
Many uses of eater2s require at least the ability to absorb a glider-or-equivalent-spark on two adjacent lanes. There are other cases where having a backstop on two sides of the block is critical to recovery -- e.g., this small color-preserving glider reflector based on a syringe:
Code: Select all
x = 60, y = 32, rule = LifeHistory
4.C51.4B$5.C49.4B$3.3CB47.4B$4.4B10.A34.4B$5.4B7.3A33.4B$6.4B5.A21.B
13.4B$7.4B4.2A19.3B11.4B$2A6.9B17.6B8.5B$.A7.6B13.4B2.7B3.8B$.A.2A5.
6B3.B2.2B2.26B$2.A2.A4.19BD23B$3.2AB3.20BDBD21B.3B$4.14B2A9B3DB2A22B$
5.13B2A11BDB2A21B2A$6.48B.B2A$6.17B.B5.23B3.B$7.15B10.B2.18B$7.15B13.
17B$8.13B14.17B$10.13B.2A.2A6.19B$9.8B4.2A2.A.A.A6.18B$9.6B6.2A.A4.A
6.4B2.12B$9.5B8.B.A.3A13.11B$9.B.B12.A.A15.8B$10.3B12.A16.10B$9.B2AB
25.A.2AB.4B2.2A$10.2A24.3AB2AB7.A$35.A4.B10.3A$36.3A.2A11.A$38.A.A$
38.A.A$39.A!