When I posted the Half-jack syntheses, both of them were missing a step. Unfortunately, it wasn't an easy step to add. Fortunately, it's just easier to build the front end slightly differently for the same cost and avoid that step altogether.
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#C Fixed Half-jack from 46 gliders
x = 188, y = 120, rule = B3/S23
38bo9bo$39bo7bo$3bo33b3o7b3o$3bobo$3boo$$bbo34boo9boo$obo33bobo9bobo$b
oo35bo9bo7boo3booboo3boo5boo3booboo3boo10booboo15booboo15booboo15boob
oo15booboo$21booboo15booboo10bobobobobobobobo5bobobobobobobobo9bobobob
o13bobobobo13bobobobo13bobobobo13bobobobo$21bo3bo15bo3bo11bo3bo3bo3bo
7bo3bo3bo3bo11bo3bo15bo3bo15bo3bo15bo3bo15bo3bo$22b3o9boo6b3o6boo9b3o
8b3o6b3o6b3o8b3o9bo7b3o7bo9b3o9bo7b3o7bo9b3o$35boo13boo23bo15bo23boo
13boo23bo15bo$22b3o9bo7b3o7bo9b3o9bo7b3o7bo9b3o9boo6b3o6boo9b3o8b3o6b
3o6b3o8b3o$21bo3bo15bo3bo15bo3bo15bo3bo15bo3bo15bo3bo11bo3bo3bo3bo7bo
3bo3bo3bo11bo3bo$21booboo15booboo15booboo15booboo15booboo15booboo10bob
obobobobobobo5bobobobobobobobo9bobobobo$boo115bo9bo7boo3booboo3boo5boo
3booboo3boo10booboo$obo113bobo9bobo$bbo114boo9boo$$3boo$3bobo$3bo113b
3o7b3o$119bo7bo$118bo9bo5$112bobo$113boo4bo41bo$113bo4bo41bo$118b3o39b
3o$46bo65bo$44bobo66bo$45boobbo61b3o$48bo87bo14bo4bo$48b3o14boo18boo
18boo18boo8bobo7boo5bobbobo7boo18boo$41booboo15boobobo14boobobo14boobo
bo14boobobo7bobbo3boobobo3b3obobbo3boobobo14boobobo$40bobobobo4b3o6bob
obo15bobobo15bobobo15bobobo10boo3bobobo10boo3bobobo15bobobo$41bo3bo5bo
9bo3bo15bo3bo15bo3bo15bo3bo15bo3bo15bo3bo14bo4bo$42b3o7bo9b3o17b3o17b
3o17b3o17b3o17b3o16b4o$$42b3o17b3o17b3o7bo9b3o17b3o17b3o17b3o16b4o$41b
o3bo15bo3bo15bo3bo5bo9bo3bo15bo3bo15bo3bo15bo3bo14bo4bo$40bobobobo13bo
bobobo13bobobobo4b3o6bobobo15bobobo10boo3bobobo10boo3bobobo15bobobo$
41booboo15booboo15booboo15boobobo14boobobo7bobbo3boobobo3b3obobbo3boob
obo14boobobo$88b3o14boo18boo8bobo7boo5bobbobo7boo18boo$88bo47bo14bo4bo
$85boobbo21b3o$84bobo26bo$86bo25bo$118b3o39b3o$113bo4bo41bo$113boo4bo
41bo$112bobo10$167bo$166bo$166b3o10$69bo$69bobo$64bo4boo$65bo$63b3o3bo
$68boo$68bobo3$84boo18boo18boo18boo38boo$65boo17bo19bo19bo19bo39bo$61b
oobobo14boobo16boobo16boobo16boobo36boobo$60bobobo15boboboo14boboboo
14boboboo14boboboo34bobobb3o$60bo4bo14bo4bo14bo4bo14bo4bo14bo4bo34bo4b
oo$61b4o16b4o16b4o16b4o16b4o36b4o$$61b4o16b4o16b4o16b4o16b4o13bo3boo
17b4o$60bo4bo14bo4bo14bo4bo14bo4bo14bo4bo12boobbobo15bo4boo$60bobobo
15bobobo15bobobo15boboboo14boboboo11bobobbo17bobobb3o$61boobobo14boobo
bo14boobobo14boobo16boobo36boobo$65boo18boo18boo17bo19bo39bo$124boo18b
oo38boo3$108bobo$108boo$103b3o3bo$105bo$104bo4boo57boo$109bobo55boo$
109bo59bo10$166b3o$166bo$167bo!
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#C Fixed Skewed half-jack from 50 gliders
x = 189, y = 88, rule = B3/S23
40bo9bo$41bo7bo$5bo33b3o7b3o$3bobo$4boo$$6bo32boo9boo$6bobo29bobo9bobo
$6boo32bo9bo7boo3booboo3boo5boo3booboo3boo10booboo15booboo15booboo15b
ooboo15booboo$23booboo15booboo10bobobobobobobobo5bobobobobobobobo9bobo
bobo13bobobobo13bobobobo13bobobobo13bobobobo$23bo3bo15bo3bo11bo3bo3bo
3bo7bo3bo3bo3bo11bo3bo15bo3bo15bo3bo15bo3bo15bo3bo$24b3o9boo6b3o6boo9b
3o8b3o6b3o6b3o8b3o7bo9b3o5bo11b3o7bo9b3o5bo11b3o$37boo13boo23bo15bo21b
oo13boo23bo15bo$22b3o11bo5b3o9bo7b3o11bo5b3o9bo7b3o9boo6b3o6boo9b3o8b
3o6b3o6b3o8b3o$21bo3bo15bo3bo15bo3bo15bo3bo15bo3bo15bo3bo11bo3bo3bo3bo
7bo3bo3bo3bo11bo3bo$21booboo15booboo15booboo15booboo15booboo15booboo
10bobobobobobobobo5bobobobobobobobo9bobobobo$boo115bo9bo7boo3booboo3b
oo5boo3booboo3boo10booboo$obo113bobo9bobo$bbo114boo9boo$$3boo$3bobo$3b
o113b3o7b3o$119bo7bo$118bo9bo5$100bobo$101boo4bo47bo$101bo4bo47bo$106b
3o45b3o$24bo75bo$22bobo76bo$23boobbo71b3o$26bo97bo24bo4bo$26b3o14boo
18boo18boo28boo8bobo7boo15bobbobo7boo18boo$19booboo15boobobo14boobobo
14boobobo24boobobo7bobbo3boobobo13b3obobbo3boobobo14boobobo$18bobobobo
4b3o6bobobo15bobobo15bobobo25bobobo10boo3bobobo20boo3bobobo15bobobo$
19bo3bo5bo9bo3bo15bo3bo15bo3bo25bo3bo15bo3bo25bo3bo14bo4bo$20b3o7bo9b
3o17b3o17b3o27b3o17b3o27b3o16b4o$$18b3o17b3o17b3o7bo9b3o27b3o17b3o27b
3o16b4o$17bo3bo15bo3bo15bo3bo5bo9bo3bo25bo3bo15bo3bo25bo3bo14bo4bo$16b
obobobo13bobobobo13bobobobo4b3o6bobobo25bobobo10boo3bobobo20boo3bobobo
15bobobo$17booboo15booboo15booboo15boobobo24boobobo7bobbo3boobobo13b3o
bobbo3boobobo14boobobo$64b3o14boo28boo8bobo7boo15bobbobo7boo18boo$64bo
57bo24bo4bo$61boobbo31b3o$60bobo36bo$62bo35bo49bo$104b3o41boo$99bo4bo
42bobo$99boo4bo$98bobo$$27bo$27bobo$22bo4boo132bo$23bo136bo$21b3o3bo
132b3o$26boo$26bobo$$159bo$42boo18boo18boo18boo28boo18boo6bo21boo$23b
oo17bo19bo19bo19bo29bo19bo5b3o21bo$19boobobo14boobo16boobo16boobo16boo
bo26boobo16boobo26boobo$18bobobo15boboboo14boboboo14boboboo14boboboo
24boboboo14boboboo24bobobb3o$18bo4bo14bo4bo14bo4bo14bo4bo14bo4bo10bobo
11bo4bo4bo9bo4bo4bo19bo4boo$19b4o16b4o16b4o16b4o16b4o11boo13b4o5bo10b
4o5bo20b4o$115bo22bo19bo3bo$17b4o16b4o16b4o16b4o16b4o26b4o16b4o11bobo
12b4o$16bo4bo14bo4bo14bo4bo14bo4bo14bo4bo10boo12bo4bo14bo4bo10boo12bo
4boo$16bobobo15bobobo15bobobo15boboboo14boboboo9boo13boboboo14boboboo
24bobobb3o$17boobobo14boobobo14boobobo14boobo16boobo12bo13boobo16boobo
7boo17boobo$21boo18boo18boo17bo19bo29bo19bo7bobo19bo$80boo18boo28boo
18boo6bo21boo3$64bobo$64boo98boo$59b3o3bo92b3o3bobo$61bo96bo5bo$60bo4b
oo92bo$65bobo$65bo!
Extrementhusiast wrote:Prepulsar shuttle 47 in 64 gliders
The P30 double-eureka this is made from can be skewed by moving the bottom half right two cells. gdThis is also one glider cheaper, as the first two blocks can then be made from 3 gliders:
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x = 36, y = 18
bbo$obo29boo$boo29boo$$bo$boo$obo4$9bobo$9boo$10bo4$34boo$34boo!
Unfortunately, the P47 can't be skewed itself.
Extrementhusiast wrote:Bulachenko's extension to the p47 in 142 gliders and 4 LWSSs
This doesn't quite work as shown. The last step has two pairs of gliders (at top and bottom) passing through each other. One can fix one of these with a kickback from the right, but if one fixes both simultaneously, the kickback gliders pass through one another, requiring yet another kickback. (I worked on this for a bit, but ran out of functioning neurons).
Something else that might reduce this a bit is producing the blinkers in the final stage, not from gliders, but from glider-object collisions (for example, glider-blinker that offsets the blinker (1,3) spaces, or possibly two different mechanisms where the activating gliders come in at different times, reducing the need for some of the kickbacks.
Extrementhusiast wrote:This steps saves one glider in the p33
This now brings the asymmetrical synthesis in at the same cost as the symmetrical one.
Extrementhusiast wrote:Single-pulsar p29 in 43 gliders
Nice! I tried making this one a few months ago (pretty much the same way, for the still lifes), but couldn't figure out the last step - how to inject the pulsar and bring both tubs in behind it simultaneously.
Sokwe wrote:Twirling T-tetsons 2 in 34 gliders, one MWSS, and one HWSS
Nice! I had tried to build this before, but could never figure out how to get the last toad in place. I see you found it almost as difficult. However, "incredibly expensive and covoluted" beats "it can't be done" any day!
Sokwe wrote:Improved a past synthesis
When I first joined this site a few months back, I had found that old synthesis on one of the posts here. I figured out what the core mechanism was, and found a way to make it out of 8 gliders (one less than you show here):
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x = 84, y = 33, rule = B3/S23
59bobo$22b2o35b2o$23b2o35bo$22bo3bobo$26b2o$27bo2$73bo8bo$28bo43bobo6b
obo$28bo44bobo4bobo$16b2o10bo45bobo2bobo$17b2o57bo2bo$16bo7b3o3b3o41bo
bo2bobo$73bobo4bobo$28bo43bobo6bobo$28bo44bo8bo$28bo5$56bo$55b2o$55bob
o7$b2o$obo$2bo!
Sokwe wrote:... p40 B-heptomino shuttle in 29 gliders
Wow. All these new syntheses should keep me busy for quite a while!
Sokwe wrote:Any other headbangers?
I'll need to re-check my "Marquis de Sade" files, so to speak. I have a huge number of files where I tried to build something, and got most of it built except for just one or two key killer steps.