dvgrn wrote:Another option [for a Geminoid replicator unit with a 10hd construction arm]: 68 Spartan still lifes (or thereabouts) with a high proportion of blocks, but with a couple of eaters in the danger zone...

I've looked over the technology a little more, and I think that for a diagonal Geminoid design, it will be better not to put any obstructions within half a dozen lanes of the construction arm. The 68-still-life layout would work fine for a Geminoid that travels obliquely, but the constraints are a bit tougher for the diagonal version.

Here's a 87-still-life 10hd Geminoid design that I think stays a safe distance from the construction lanes. The only thing that comes within a dozen lanes is a single eater in Circuit B, part of an Fx77 conduit -- and that eater can be constructed last, so there shouldn't be any problem.

`#C Geminoid with 10hd construction arms`

#C 87 still lifes per replicator unit (without self-destruct seeds)

x = 478, y = 423, rule = B3/S23

106b2o$106b2o45$151bo$151b3o$154bo11bo$102bo50b2o9b3o$102b3o58bo$105bo

57b2o10b2o$104b2o69bo$173bobo$173b2o$150b2o$150b2o41bo$129b2o52b2o6b3o

$101b2o26b2o52b2o5bo$101b2o87b2o3$189b2o$184b2o3b2o$159b2o23b2o$160bo$

83b2o6b2o64b3o$83bo7bo65bo$84b3o5b3o11b2o28b2o57bo7bo$86bo7bo11b2o28b

2o55b3o5b3o11bo$192bo7bo14b3o$192b2o6b2o16bo14bo$120b2o95b2o12b3o$75b

2o43bo11b2o4b2o90bo$75b2o3b2o39b3o8b2o4bo91b2o$80b2o41bo15b3o$110b2o

29bo$111bo117b2o$67b2o12b2o25b3o99b2o17b2o$68bo5b2o5bo26bo101b2o$65b3o

6b2o6b3o$65bo18bo4$213b2o$214bo$211b3o$68bo142bo$68b3o145b2o$71bo145bo

$70b2o142b3o$83bo130bo$81b3o$80bo$80b2o2$27b2o$28bo25bo11b2o$28bobo21b

3o11b2o25b2o$29b2o20bo41bo132b2o$51b2o38bobo132b2o$91b2o4$120bo$118b3o

$61b2o54bo$61b2o41b2o11b2o$87b2o15b2o$87b2o49bo$128b2o6b3o$128b2o5bo

91b2o$135b2o90bobo$30b2o32b2o163bo$30b2o11b2o20bo163b2o$43bo18b3o69b2o

$44b3o15bo66b2o3b2o$46bo82b2o2$18b2o$18bo$19b3o118bo7bo$21bo116b3o5b3o

11bo$103b2o32bo7bo14b3o54b2o$102bobo32b2o6b2o16bo14bo38b2o$35b2o65bo

59b2o12b3o26b2o$10b2o23b2o64b2o72bo28bobo$10b2o3b2o158b2o27bo$15b2o

186b2o2$31b2o4b2o135b2o52b2o$2b2o12b2o13b2o4bo117b2o17b2o31b2o19bo$3bo

5b2o5bo21b3o114b2o51bo17bobo$3o6b2o6b3o20bo167bobo15b2o$o18bo189b2o4bo

$214bobo$214bobo$215bo10b2o$158b2o66bobo$159bo68bo$156b3o69b2o$156bo

56b2o$161b2o51bo$162bo48b3o$159b3o49bo$159bo8$171b2o$171b2o12$172b2o$

172bobo$174bo$174b2o9$162b2o$162b2o$150b2o$149bobo$149bo$148b2o2$173b

2o$152b2o19bo$153bo17bobo231b2o$153bobo15b2o232bo$154b2o4bo242bobo$

159bobo199bo37b2o2b2o$159bobo173bo9bo15b3o35b2o$160bo10b2o162b3o5b3o

18bo$171bobo164bo3bo20b2o11b2o$173bo163b2o3b2o32b2o$173b2o$158b2o$159b

o$156b3o$156bo$172b3o$172bo$173bo177b2o52b2o$351b2o34b2o16bobo$339b2o

45bobo18bo$338bo2bo44bo20b2o$333b2o4b2o44b2o4b2o$332bobo55bobo$332bo

57bo$331b2o56b2o7b2o$341b2o55b2o$341bo$342b3o$344bo$349b2o$350bo$347b

3o$347bo60b2o$408bo$406bobo$406b2o5$408b2o$408bo$406bobo11b2o$406b2o

12bo$418bobo$414b2o2b2o$414b2o4$413b2o$413b2o4b2o$419b2o5$350b2o$350bo

$348bobo75bo$306bo37b2o2b2o74b3o$280bo9bo15b3o35b2o77bo$280b3o5b3o18bo

113b2o$283bo3bo20b2o11b2o$282b2o3b2o32b2o5$428b2o$428bo$426bobo$296b2o

52b2o74b2o$296b2o34b2o16bobo$284b2o45bobo18bo$283bo2bo44bo20b2o58b2o$

278b2o4b2o44b2o4b2o73bobo$277bobo55bobo73bo$277bo57bo74b2o$276b2o56b2o

7b2o$286b2o55b2o$286bo141b2o$287b3o138bobo$289bo140bo$294b2o125b2o7b2o

$295bo125b2o$292b3o$292bo60b2o$353bo$351bobo$351b2o4$401b2o$353b2o47bo

$353bo48bobo$351bobo11b2o36b2o$351b2o12bo42b2o$363bobo42b2o$359b2o2b2o

$359b2o$403b2o$403b2o2$358b2o59b2o$358b2o4b2o53b2o$364b2o5$402b2o$403b

o$403bobo$370b2o32b2o$370bo$368bobo$368b2o6$400b2o$399bobo$399bo$398b

2o$408b2o66b2o$408b2o66b2o$367b2o56b2o$351b2o14b2o56bobo$352bo74bo$

349b3o66b2o7b2o$349bo68b2o7$378bo29b2o$376b3o30bo$375bo33bobo$375b2o

33b2o3$366b2o$366b2o$408b2o$409bo$396b2o11bobo$384b2o11bo12b2o$384bo

12bobo$382bobo13b2o2b2o$382b2o18b2o4$403b2o$397b2o4b2o$397b2o3$386b2o$

386bobo$388bo$388b2o8b2o$378b2o17bobo$378b2o17bo$361b2o33b2o$360bobo$

360bo$359b2o7b2o$368b2o7$378b2o$378bo$376bobo$376b2o5$358b2o$359bo$

359bobo$360b2o3$342b2o$343bo$343bobo$344b2o$349b2o$349b2o3$344b2o$344b

2o15b2o$361b2o14b2o$377bo$378b3o$380bo6$353b2o$354bo$341b2o11bobo$342b

o12b2o$342bobo$343b2o2b2o$347b2o4$348b2o$342b2o4b2o$342b2o6$343b2o$

342bobo$342bo$341b2o!

It looks as if 10hd construction arms are about one-third more efficient than 9hd construction arms, in terms of elbow operations and/or the total number of glider pairs in the average recipe. This seems to be because the 10hd toolkit includes longer INC and DEC operations and a wider variety of glider outputs. I'm still working on the details, but it seems pretty clear that there's a significant advantage -- so at this point I'm officially switching over to developing 10hd technology.

The original reason to investigate 10hd glider pairs is that 10hd is compatible with semi-Snarks, whereas 9hd isn't. This may eventually be useful somehow, but construction difficulties showed up several posts back: at least one semi-Snark would have to be built right on the construction arm's glider-pair lanes. That's certainly possible, but it would take new technology to do it efficiently. So for now the jury is still out on semi-Snark-assisted layouts, at least for diagonal Geminoids.

There's one other big reason that I prefer the above layout to the smaller 10hd designs. In this version, Circuit A and Circuit B both contain an F166 conduit, which is trivial to switch on and off as this design requires. The one-time switching circuitry is all included in the 87 still lifes, so the only thing not shown is a construction-arm elbow block.

-- Except for the seeds for the self-destruct circuitry, of course. Anyone want to try their hand at getting this replicator unit to self-destruct? It's lots of fun for those who like impressive explosions (and who doesn't, after all?)

Here's a template for the 10hd Geminoid R.U. that can be pasted in as a puzzle to the latest Seeds of Destruction Game alpha. If you'd prefer a different starting point for the puzzle, the glider can be moved southeast some distance, as long as the one-time-turner/eater combination in the southeast is adjusted to match it.

`#C Template for 10hd Geminoid replicator-unit self-destruct puzzle`

x = 341, y = 230, rule = LifeHistory

170.A$169.A$169.3A7$183.58B$182.B58.B$181.B60.B$173.8B62.B$172.B71.B$

110.62B73.B$109.8B129.B$108.9B130.B$107.10B131.B$106.12B36.3B92.B$

105.14B33.5B31.A61.B$104.15B33.6B30.3A60.B$103.17B30.8B33.A11.A48.B$

102.18B19.A10.8B32.2A9.3A49.B$101.18B20.3A8.9B4.B26.B9.A53.B$100.21B

21.A5.11B3.3B23.3B9.2A10.2A41.B$99.22B20.2A3.13B2.6B19.6B5.5B10.A43.B

$98.B3.19B20.B4.13B.7B2.4B10.10B3.4B9.BA.A44.B$97.B5.17B19.3B5.28B2.

2B3.11B2.6B4.3B.B2A46.B$96.B6.18B16.6B3.41B2A13B.7B49.15B$95.B7.20B

11.10B2.18B2A21B2A21B20.A43.B$94.B9.22B2.2B3.11B.19B2A43B11.2A6.3A44.

B$93.B10.34B2A70B9.B2AB4.A48.B$92.B13.32B2A72B8.3B4.2A48.B$91.B15.64B

5.B.13B3.B.19B2.2B2.B2.5B49.B$90.B16.59B2.B13.B.7B7.29B52.B$89.B17.

60B31.6B.21B2A52.B$88.B18.13B4.4B.13B2.24B28.5B.B2.16B2A3B2A53.B$87.B

19.6B4.3B5.3B5.B.7B2.25B.3B23.2A7.16B2A2B.B55.B$86.B19.7B5.4B4.4B15.

20B.8B23.A8.19B58.B$85.B21.6B7.2A6.2A17.18B.8B20.3A16.10B60.B$84.B23.

6B6.A7.A15.B.30B18.A19.9B60.B$83.B24.6B7.3A5.3A11.2A18B.12B39.9B8.A7.

A42.B$82.B24.8B8.A7.A11.2A18B2.10B41.7B7.3A5.3A11.A30.B$81.B26.6B30.

13B3.3B4.8B42.6B6.A7.A14.3A28.B$80.B26.7B30.11B.3B2.B5.8B41.6B7.2A6.

2A16.A14.A12.B$79.B25.11B30.9B2.2A8.5B.4B38.8B4.4B4.4B15.2A12.3A12.B$

78.B24.9B2A2B.B29.7B3.A8.6B3.2A39.8B2.3B5.3B5.B.7B3.3B.2B7.A15.B$77.B

25.9B2A3B2A30.4B5.3A4.6B4.A40.13B4.4B.13B5.5B6.2A14.B$76.B26.14B2A28.

5B8.A3.4B8.3A37.46B2.5B14.B$75.B28.14B29.2A14.4B11.A37.51B16.B$74.B

29.3B.2B2.B2.5B28.A13.4B50.50B2A15.B$73.B30.2A5.3B4.2A25.3A13.4B50.

32B2A17B2A15.B$72.B32.A4.B2AB4.A26.A14.4B49.34B2A16B.B16.B$71.B30.3A

6.2A6.3A37.4B50.22B2.2B3.23B18.B$70.B31.A18.A36.4B50.20B11.10B2.9B19.

B$69.B87.4B51.21B13.6B3.8B20.B$68.B87.4B52.17B.4B14.3B4.7B21.B$67.B

87.4B52.19B.4B15.B3.11B18.B$66.B87.4B51.21B2.4B14.2A2.12B17.B$65.B87.

4B52.21B3.4B14.A2.12B17.B$64.B87.4B52.20B6.4B10.3A4.11B17.B$63.B41.A

45.4B54.20B6.4B9.A4.4B.8B17.B$62.B42.3A42.4B56.19B7.4B13.2A4.7B17.B$

61.B46.A40.4B57.18B9.4B13.A4.7B18.B$60.B46.2A39.4B59.17B10.4B9.3A6.6B

19.B$59.B47.5B8.A26.4B60.16B12.4B8.A8.7B19.B$58.B50.4B5.3A25.4B62.14B

14.4B16.8B19.B$57.B49.7B3.A27.4B64.13B15.4B16.8B19.B$56.B49.9B2.2A25.

4B68.11B15.4B15.9B19.B$55.B48.11B.3B2.B21.4B70.9B17.4B13.6B.4B19.B$

54.B9.2A38.13B3.3B19.4B71.7B20.4B12.7B.4B19.B$53.B11.A25.A11.2A18B18.

4B73.4B23.4B12.6B2.4B19.B$52.B12.A.AB20.3A11.2A18B7.2A8.4B75.4B23.4B

4.B4.8B3.4B19.B$51.2B13.2AB.B17.A15.B.18B6.A8.4B77.4B23.2B3.4B.6B2AB

5.4B19.B$50.4B14.4B16.2A17.18B2.BA.A7.4B79.4B21.17B2A2B5.4B19.B$49.5B

14.4B14.4B15.20B2.B2A7.4B81.4B21.19B7.4B19.B$48.7B13.5B12.3B5.B.7B2.

24B8.4B83.4B20.18B9.4B19.B$47.8B12.6B11.4B.13B2.24B7.4B85.4B21.13B13.

4B19.B$46.8B13.8B2.50B7.4B87.4B22.12B13.4B19.B$45.11B10.60B2.B4.4B20.

A68.4B23.10B14.4B19.B$44.12B11.64B.5B.3B.B12.3A69.4B22.11B14.4B19.B$

43.13B12.7B.22B2A44B10.A73.4B22.2B.7B15.4B19.B$42.13B12.31B2A26B2A13B

2A2B5.B3.2A73.4B21.11B15.4B19.B$41.15B11.19B2.2B3.11B.21B2A13B2A2B3.

8B74.4B19.11B17.4B19.B$40.18B8.17B11.10B2.39B.8B21.A55.4B18.11B18.4B

19.B$39.22B2.2B.15B16.6B3.48B11.2A6.3A56.4B17.11B19.4B19.B$38.42B19.

3B5.28B2.2B.15B9.B2AB4.A60.4B16.8B2.B2A18.4B19.B$37.B3.30B.8B21.B4.

13B.13B7.17B8.3B4.2A60.4B15.7B3.BA.A18.4B19.B$36.B5.25B2A2B3.8B19.2A

3.13B2.6B14.19B2.2B2.B2.5B61.4B14.7B6.A19.4B19.B$35.B6.25B2A2B5.B3.2A

20.A5.11B3.3B16.31B64.4B13.6B7.2A19.4B19.B$34.B7.28B10.A18.3A8.9B4.B

18.7B.21B2A64.4B11.7B29.4B19.B$33.B8.13B4.4B.3B.B12.3A15.A10.8B23.25B

2A3B2A65.4B9.8B30.4B19.B$32.B9.6B4.3B5.4B19.A26.8B22.26B2A2B.B67.4B7.

8B32.4B19.B$31.B9.7B5.4B4.4B47.6B23.8B2.19B70.4B5.9B33.4B19.B$30.B11.

6B7.2A5.4B46.5B24.6B11.10B73.4B3.4B.6B33.4B19.B$29.B13.6B6.A7.4B47.3B

25.5B12.9B74.4B.4B.7B34.4B19.B$28.B14.6B7.3A5.4B.3B70.4B14.9B8.A7.A

57.7B2.6B36.4B19.B$27.B14.8B8.A6.8B69.4B15.7B7.3A5.3A11.A46.5B3.6B37.

4B19.B$26.B16.6B16.8B67.2AB.B17.6B6.A7.A14.3A44.5B4.B2A2B38.4B19.B$

25.B16.7B14.12B64.A.AB18.6B7.2A6.2A16.A14.A28.6B2.2B2A3B38.4B19.B$24.

B15.11B12.12B64.A20.8B4.4B4.4B15.2A12.3A26.2AB2.4B.7B39.4B19.B$23.B

14.9B2A2B.B11.10B64.2A21.8B2.3B5.3B5.B.7B3.3B.2B7.A28.A.AB3.4B.5B41.

4B19.B$22.B15.9B2A3B2A12.8B87.13B4.4B.13B5.5B6.2A27.A7.9B42.4B19.B$

21.B16.14B2A12.8B87.46B2.5B26.2A8.8B43.4B19.B$20.B18.14B13.5B.4B85.

51B39.7B44.4B19.B$19.B19.3B.2B2.B2.5B10.6B3.2A85.50B2A39.6B7.2A36.4B

19.B$18.B20.2A5.3B4.2A9.6B4.A85.32B2A17B2A31.2A5.7B7.A38.4B19.B$17.B

22.A4.B2AB4.A9.4B8.3A80.34B2A16B.B33.A6.7B3.BA.A39.4B19.B$16.B20.3A6.

2A6.3A5.4B11.A80.22B2.2B3.23B35.A.AB.11B.B2A41.4B19.B$15.B21.A18.A4.

4B92.20B11.10B2.9B37.2AB.2BA10B44.4B19.B$14.B45.4B93.21B13.6B3.8B40.

3BABA10B44.4B19.B$13.B45.4B94.17B.4B14.3B4.7B41.3BABA9B46.4B19.B$12.B

45.4B94.19B.4B15.B3.11B40.2BA8B.B2A45.4B19.B$11.B45.4B93.21B2.4B14.2A

2.12B41.8B2.BA.A45.4B19.B$10.B45.4B94.21B3.4B14.A2.12B41.3B2.4B4.A46.

4B19.B$9.B45.4B94.20B6.4B10.3A4.11B39.5B3.4B3.2A46.4B19.B$8.B45.4B96.

20B6.4B9.A4.4B.8B39.2AB6.4B51.4B19.B$7.B45.4B98.19B7.4B13.2A4.7B40.A

8.4B51.4B19.B$6.B45.4B99.18B9.4B13.A4.7B37.3A10.4B51.4B19.B$5.B45.4B

18.58B25.17B10.4B9.3A6.6B37.A13.4B51.4B19.B$4.B45.4B18.B58.B24.16B12.

4B8.A8.7B51.4B51.4B$3.B45.4B18.B60.B24.14B14.4B16.8B51.4B51.4B$2.B45.

4B11.8B62.B24.13B15.4B16.8B51.4B51.4B$.B45.4B11.B71.B26.11B15.4B15.9B

51.4B51.4B$62B73.B26.9B17.4B13.6B.4B51.4B51.4B$136.B25.7B20.4B12.7B.

4B51.4B51.4B$137.B25.4B23.4B12.6B2.4B51.4B51.4B$138.B25.4B23.4B4.B4.

8B3.4B51.4B51.4B$139.B25.4B23.2B3.4B.6B2AB5.4B51.4B51.4B$140.B25.4B

21.17B2A2B5.4B51.4B51.4B$141.B25.4B21.19B7.4B51.4B51.3B$142.B25.4B20.

18B9.4B51.4B51.2B$143.B25.4B21.13B13.4B51.4B51.B$144.B25.4B22.12B13.

4B51.4B$145.B25.4B23.10B14.4B51.4B$146.B25.4B22.11B14.4B51.4B$147.B

25.4B22.2B.7B15.4B51.4B$148.B25.4B21.11B15.4B51.4B$149.15B11.4B19.11B

17.4B51.4B$164.B11.4B18.11B18.4B51.4B$165.B11.4B17.11B19.4B51.4B$166.

B11.4B16.8B2.B2A18.4B51.4B$167.B11.4B15.7B3.BA.A18.4B51.4B$168.B11.4B

14.7B6.A19.4B51.4B$169.B11.4B13.6B7.2A19.4B51.4B$170.B11.4B11.7B29.4B

51.4B$171.B11.4B9.8B30.4B51.4B$172.B11.4B7.8B32.4B51.4B$173.B11.4B5.

9B33.4B51.4B$173.B12.4B3.4B.6B33.4B51.4B$173.B13.4B.4B.7B34.4B51.4B$

173.B14.7B2.6B36.4B51.4B$173.B15.5B3.6B37.4B51.4B$173.B15.5B4.B2A2B

38.4B51.4B$173.B15.6B2.2B2A3B38.4B51.4B$173.B13.2AB2.4B.7B39.4B51.4B$

173.B12.A.AB3.4B.5B41.4B51.4B$173.B12.A7.9B42.4B51.4B$173.B11.2A8.8B

43.4B$173.B22.7B44.4B$173.B23.6B7.2A36.4B$173.B15.2A5.7B7.A38.4B$173.

B16.A6.7B3.BA.A39.4B$173.B16.A.AB.11B.B2A41.4B$173.B17.2AB.2BA10B44.

4B$173.B19.3BABA10B44.4B$173.B19.3BABA9B46.4B$173.B21.2BA8B.B2A45.4B$

173.B23.8B2.BA.A45.4B$173.B23.3B2.4B4.A46.4B$173.B21.5B3.4B3.2A46.4B$

173.B21.2AB6.4B51.4B$173.B22.A8.4B51.4B$174.B18.3A10.4B51.4B$175.B17.

A13.4B51.4B$176.B31.4B51.4B$177.B31.4B51.4B$178.B31.4B51.4B$179.B31.

4B51.4B$180.B31.4B51.4B$181.B31.4B51.4B$182.B31.4B51.4B$183.B31.4B51.

4B$184.B31.4B51.4B$185.B31.4B51.4B$186.B31.4B51.4B$187.B31.4B51.4B$

188.B31.4B51.4B$189.B31.4B$190.B31.4B$191.B31.4B$192.B31.4B$193.B31.

4B$194.B31.4B$195.B31.4B$196.B31.4B$197.B31.4B$198.B31.4B$199.B31.4B$

200.B31.4B$201.B31.4B$202.B31.4B$203.B31.4B$204.B31.4B$205.B31.4B$

206.B31.4B$207.B31.4B$208.B31.4B$209.B31.4B$210.B31.4B$211.B31.4B$

212.B31.4B$213.B31.4B$214.B31.4B$215.B31.4B$216.B31.3B$217.B31.2B$

218.B31.B$219.B$220.B$221.B$222.B$223.B$224.B$225.B$226.B$227.B$228.B

$229.B$230.B!

Unfortunately the latest SODGame still has the bug where the Copy button doesn't work for newly pasted puzzles. It works fine for the pre-set puzzles, though -- so for now, I'll try to put together an alpha with this puzzle as one of the built-in options.