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How do I make qfind dump automatically, and how do I adjust the dumping interval? Use the 'd' parameter to dump the state after each queue compaction. You can read qfind's parameter descriptions by running ./qfind c The state dumps after each deepening step completes, so there is no direct way to "...

No mention here of non-totalistic rules, but I guess this belongs here. When I created this thread, I assumed Life-like rules were totalistic (edit: I mean semi-totalistic), but either the definition has changed over time or it was never what I thought. I don't mind the occasional non-totalistic ru...

wwei23 wrote: ↑
October 9th, 2020, 10:14 am
How do I restart a qfind search from a dump file?

Code: Select all

./qfind s FILENAME

where "FILENAME" is the name of the dump file. For example,

Code: Select all

./qfind s dump0011

Here is a small collection of ships that cover some B2 rules for which no ships were previously known: :Matthias Merzenich, 2020:B256/S0236:B25678/S02368:2:0:-2:24:12:7b4o2b4o2$5o3b2o4b2o3b5o$2bo6b2o2b2o6bo$b3o5bob2obo5b3o$2bo3bo2bo4bo2bo3bo$9bo4bo$3b2o4b2o2b2o4b2o$4bo4bob2obo4bo$5bo2bo2b2o2bo2bo2$6...

is this really a stabilization of an agar? Yes. jslife only includes the minimal agar stabilizations to save space. why is this P6 not-a-billiard-table (Extremely Impressive) in the billiard tables section? Technically, that isn't quite extremely impressive , although it is closely related. The ter...

wwei23 wrote: ↑
August 24th, 2020, 1:09 pm
I couldn't find this in jslife or on the Wiki, is it new?

It's in jslife, but not in the obvious place. It's in osc/x-djb-oscillators.lif (4th oscillator in column 1).

Where was the first time these ships were mentioned? I think we do have sth like a collection of c/2 ships under 50 cells? We do have such a collection available here . The credits for pushalong 1 read DB 13 Aug 1992 (using OWSS; MWSS support found by DB on 16 Aug 1992) where "DB" is David Bell. I'...

I discovered a collection of over 100 spaceships that I had found in 2016 but never posted: :Matthias Merzenich, 2016:B2/S0156:B278/S015678:2:1:1:52:52:6bobo$5b2obo$bo2b3o2bo$4bo$bo5bo2b2o$4bo5bobo$4b3obobo2bo$6b4o4bo$o2bo2bobo3b3o$3b2o6bo4bo$o6bo2b3o4b2o$7b3obo2bo$4bobo3b3o2b4o$11bo2bo3bobo$16bobo3...

Then only a 2c/5 grey stretcher would be missing. A grey stretcher would be difficult, considering we don't yet have a 2c/5 wickstretcher of any type. I know of only one wick that might work: x = 112, y = 33, rule = B3/S23 2bobo4bobo4bobo4bobo4bobo4bobo4bobo4bobo4bobo4bobo4bobo4bobo4bobo4bobo 4bobo...

Since no new spaceship discoveries have been announced in 17 days, I'll go ahead and post the updated version of the database. It's always going to be fairly painful to find the latest version of something that keeps getting posted and re-posted, with lots of incremental messages in between. My sug...

There mus be a completion of this 2c/5 grey ship corner: Maybe you already had a plan, but this will fix the bottom: Here's an even smaller completion for the bottom: x = 65, y = 94, rule = B3/S23 23bobobo$22obobobo$21bobob2o$21o2bo2bo$23bo$22obobobobo$23bobobobo$23o 2bob2o$23bobo2bo$23o2bo$25bobob...

There mus be a completion of this 2c/5 grey ship corner: I haven't completed it, but I did fix a small problem with part of the connection: x = 82, y = 97, rule = B3/S23 23bobobo$22obobobo$21bobob2o$21o2bo2bo$23bo$22obobobobo$23bobobobo$23o 2bob2o$23bobo2bo$23o2bo$25bobobobo$26obobobo$25bobob2o$25o...

Huzzah! I actually found something! That's great! Here are some more new speeds in that rule: x = 153, y = 35, rule = B3/S346 59b3o$59b2o$60bob2o$60bo3bo$59bobo2bo$59bob2o3bo$55bob4o2b4o73bo6bo$ 51bo4bo2b4o2b2o73bo6bo$56b3obo78b2o6b2o$51bobobob2obo49b2o3b2o22b2o6b 2o$54b2o2b2o48b2o7b2o21bobo2bobo$4...

Bit of a run-on, improvements welcome... Catagolue is definitely a huge omission from the POTD list. Maybe the entry could be generalized like this? I think both descriptions are a bit too verbose (when compared to other entries). I shortened the first and basically rewrote the second: #35 Single-c...

calcyman wrote: ↑
July 23rd, 2020, 7:14 am
I'd suggest "single-channel universal construction" as an entry

Can someone with more knowledge of this entry and its uses (and its discoverers) provide a description for it?

Is this a c/3 spaceship already discovered ? As yujh said, probably not, although there are a lot of c/3 ships, so we don't document them all. How did you find it? right before that complex part is already the previously-known connection Nice catch! This is much more elegant. I see that the connect...

This is my best partial so far: Based on this, here is a completed greyship: Here is a reduction of the connecting component: x = 145, y = 129, rule = B3/S23 7b2obo$7b5o$6bo3b2o$7b2o$7b2o12b2o$2b4o$2bo3bo4b2ob2o4b2o2bo$2b2o2b2o 3b2ob3ob2o2bobo19b2o$4bo3bo9b2o5bo17b6o$5b12obo6b2o15bo3bo$16b2o6bo4bo ...

This is my best partial so far: Based on this, here is a completed greyship: x = 145, y = 129, rule = B3/S23 7b2obo$7b5o$6bo3b2o$7b2o$7b2o12b2o$2b4o$2bo3bo4b2ob2o4b2o2bo$2b2o2b2o 3b2ob3ob2o2bobo$4bo3bo9b2o5bo$5b12obo6b2o$16b2o6bo4bo$3b12ob2o5b2o4bo$ 2bo11bob2o6b5o$2ob10o12bo$o2bo$6o3bobo$4b2obo2bo$...

Do we have already a completion for the following wick? Here is a stabilization for that wave: x = 30, y = 85, rule = B3/S23 7b2obo$7b5o$6bo3b2o$7b2o$7b2o12b2o$2b4o$2bo3bo4b2ob2o4b2o2bo$2b2o2b2o 3b2ob3ob2o2bobo$4bo3bo9b2o5bo$5b12obo6b2o$16b2o6bo4bo$3b12ob2o5b2o4bo$ 2bo11bob2o6b5o$2ob10o12bo$o2bo$6o...

Hunting wrote: ↑
July 23rd, 2020, 3:27 am
May I sneak Naszvadi's new smallest c/5 puffer in?

This competition covers the years 2010 through 2019. That puffer was found in 2020, so it does not qualify for this competition. However, it certainly qualifies for the next Pattern of the Year competition.

I want to get the voting thread back up and running, because bubblegum worked hard at it and we have waited a long time for it. By the way, if anyone opposes my... intervention, and just wants me to start up the contest again without changes, please feel free to comment. I'm wielding my moderator po...

I have a few immediate comments. I think it is essential that we nominate the still life and spaceship syntheses found over the decade. I am of the opinion that the small still life syntheses could be nominated as a single collection. This includes syntheses of all still lifes up to 18 bits, and che...

I have temporarily locked the new voting thread so that we may finalize the nominees, rules, and time-frame for this competition. I am including here the current (unedited) list of nominees from the voting thread: 1) David Hilbert , the first discovered p23 oscillator, by Luka Okanishi and Aidan F. ...

There are some issues with this thread that I feel necessitate a temporary lock. I or another moderator can unlock this topic once the issues are addressed. I am sorry for the inconvenience. Before starting a voting thread, it is necessary to post some discussion in the nomination thread. It is help...

I've looked through the source code of qfind but was unable to understand the underlying algorithms. qfind's algorithm is just gfind but the de Bruijn graphs are replaced by a large lookup table. gfind's algorithm is described in this paper by David Eppstein. zfind may be easier to understand than ...

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