Newbie discovery

[Scorbie]

I am relatively new here and when I find an interesting pattern, I always wonder if the pattern was previously known or not.

1. Is this pattern known? (A p136 backrake)
2. Could you tell me where to look for discovered patterns other than the ones posted on 'Game of life links'?

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x = 88, y = 28, rule = B3/S23
83b5o$77b2o3bo4bo$bo71b4ob2o7bo$2o71b6o3bo3bo$obo71b4o6bo$83b3o$83b4o$
83b2ob2o$74b2o2b3o4b2o2$64b2o2bob2o$64b5obobo$72bob3ob3o4b2o$64b5obobo
10b2ob2o$64b2o2bob2o11b4o$83b3o$84bo$82bo3bo$87bo$82bo4bo$83b5o3$21b3o
$20b5o17b4o$20b3ob2o15b6o$23b2o16b4ob2o$45b2o!

[Jackk]

I've got no idea whether or not it was already known, but in any case I really like the mechanism it uses!

[dvgrn]

Is this pattern known? (A p136 backrake)

Looks like it might be new -- at least I can't find a reference to it immediately. There are known ways of building adjustable high-period rakes with similar burning blinker trails. Blinker puffers got investigated a fair amount in the 1990s by David Bell, among others; they show up in his Spaceships in Conway's Life articles. But this p136 backrake seems to be fixed-period.

You might check the c2-extended section in Jason Summers' jslife collection.

Just for the record, here's one of the many strange objects built using blinker fuses back in 1992:

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#C Population is unbounded but does not tend to infinity.  Its graph
#C is a sawtooth function with ever-increasing teeth.  More
#C specifically, the population in generation  t = 385*9^n - 189
#C (n>=1),  is t/4 + 1079,  but the population in generation
#C 1155*9^n - 179 (n>=0)  is only 977.
#C The pattern consists of two parts, a stationary shotgun and a set
#C of puffers moving east.  The shotgun produces, and usually
#C destroys, a salvo consisting of a MWSS and 2 LWSSs.  The moving
#C part consists of a period 8 blinker puffer (found by Bob
#C Wainwright), and two p24 glider puffers, whose output gliders
#C destroy each other (with help from an accompanying MWSS).  In
#C generation  385*9^n - 189  (n>=1)  (and 228 for n=0), a salvo hits
#C the back end of the row of blinkers, causing it to decay at 2c/3.
#C When the row is completely gone, a new row starts to form and a
#C spark is produced.  The spark is turned into a glider by an
#C accompanying HWSS; the glider is turned into a westward LWSS, in
#C generation 1155*9^n - 127  (n>=0), by interaction with the glider
#C puffers.  (This 3 glider synthesis of a LWSS is due to David
#C Buckingham.)  When the LWSS hits the shotgun, in generation
#C 2310*9^n - 184  (n>=0),  another salvo is released, starting the
#C cycle again.
#C The idea for this sawtooth pattern was suggested by Bill Gosper.
#O Dean Hickerson, 7/8/92
x = 199, y = 102, rule = B3/S23
17b2o$18bo$91bo$91bobo$94b2o6b2o$52b2o24bo15b2o3bo4bo$53bo23b2o15b2o3b
2o4bo$34b2o17bobo5b2o13b2o13bobo11bo9bo$33bobo18b2o5b3o11b3o13bo13bo8b
2o$23b2o7b3o12bo15b2obo9b2o26bo$23bo7b3o13b4o12bo2bo10b2o23b2o$16b3o
13b3o4bobo6b4o11b2obo11bo$15bo3bo13bobo3b2o7bo2bo9b3o$14bo5bo13b2o4bo
7b4o9b2o$15bo3bo27b4o4b2o17b2o$16b3o28bo7bobo16bo$16b3o38bo$57b2o$40b
2o9b2o64b2o$39bo2bo7bo2bo63bo$39b3o9b3o61bobo$14b3o25b9o64b2o$13b2ob2o
23bo2b5o2bo$13b2ob2o23b2o2b3o2b2o134bo$13b5o169bo$12b2o3b2o163bo4bo$
46bo136b5o$47bo$43bo3bo12bo$44b4o13bo$56bo4bo123b2o$57b5o120b3ob2o$
177b3o3b4o$184b2o$15bo$15b2o$67b2o115bo$66bobo116bo$9bobo40bo12b3o8b2o
101bo5bo$7bo3bo40b4o8b3o10bo102b6o$2o5bo10b2o3b2o28b4o8b3o24bo$o5bo10b
obo3bo2bo15bo10bo2bo9bobo18b3ob2o3bo$7bo11bo7bo7bo6b2o9b4o10b2o18b4o4b
2o$7bo3bo15bo6b2o16b4o35b2o$9bobo15bo24bo$23bo2bo38b2o16b2o$23b2o40bo
16bobo$81b3o$81b2o79bo$84b2o77bo$83b3o71bo5bo$158b6o2$84bo$83b2o2$57bo
126b2o$56b2o122b4ob2o$45b2o8b2o11bo26bo84b6o$45bo8b3o9bobo26b2o84b4o
12bo$55b2o8bobo12bo54b5o58bo$56b2o2b2o2bo2bo11b2o14bo38bo4bo54bo3bo$
57bo2bo4bobo26bobo42bo55b4o$66bobo25bo2bo40bo20b4o27b3o$68bo26bo2bo59b
o3bo25b2ob2o$162bo21b3o3b3o$95bo65bo33b4o$95b2o97bo3bo$172b2o24bo$171b
4o22bo$171b2ob2o$66b2o105b2o6b6o$65b3o27bo73bo10bo5bo$55b2o5bob2o12bo
15b2o71bobo16bo$55bo6bo2bo12b2o29b2o58bo15bo$62bob2o13b2o27bo64b2o$65b
3o11b3o11bo13bo9b2o52b2ob2o$66b2o11b2o10bobo13bo10bo17b2o33b4o$78b2o9b
2o16bo27bo2bo33b2o$78bo10b2o17bo29bo$89b2o18b2o27bo22b6o$91bobo41b2obo
21bo5bo$93bo42bo29bo$149b2obo2bo9bo$148b2o6bo$137bo12bobo3bo$136b2o15b
4o4$168bo$137bo29b2o$137b2o12bo14b2o8b2o$125bo23bobo13b3o9bo$125bobo
20bobo15b2o$114b2o12b2o9b2o6bo2bo16b2o$114bo13b2o9bo8bobo17bo$128b2o6b
2o6b2o3bobo$125bobo7b3o7bo5bo$125bo10b2o$139bo$139b2o!

[Scorbie]

I've got no idea whether or not it was already known, but in any case I really like the mechanism it uses!

Thanks a lot! I actually found it by chance

Just for the record, here's one of the many strange objects built using blinker fuses back in 1992: (a sawtooth which uses the house fuse)

Well that is inspiring! I always find it very hard to syncronize the timing.