AbhpzTa wrote:15.889 in 7G: ...

This reduces 15.624 to 12:

`x = 94, y = 29, rule = B3/S23`

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EDIT:

BlinkerSpawn wrote:From here, for 15.297: ...

Getting a beehive and LOM in place is easy, but I coulldn't find a way to get the bookend that close.

BlinkerSpawn wrote:For 15.889: ... 15.624: ... Everything but the R in 9G: ...

(Actually, I think you swapped 15.889 and 15.624).

The last two yield the following 12-glider synthesis for 15.889, which is purely academic, given AbhpzTa's 7 glider synthesis:

`x = 134, y = 39, rule = B3/S23`

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