Herik Zorneck wrote:Sorry if I seem to insist on silly things, I am a novice in life and opinion of all of you is importamnte to I try improve my work.
Don't worry. Even the most seasoned Lifenthusiasts were novices once, and knowing which areas are new ground, as compared to well-trodden paths, is something that usually comes with experience.
When considering Life patterns, there are usually two different things to consider: form, and function. When looking at things that have little or no function (e.g. still-lifes), form is everything. For things like glider guns, on the other hand, function (e.g. what gliders are emitted and where) is usually more important than form (e.g. just how the shuttles are stabilized). In cases where there are multiple mechanisms involved, these are considered separately.
In the case of your gun, there are basically three mechanisms involved: 1) the glider-producing interaction of two queen bee shuttles (found by Gosper 40+ years ago), 2) the block eating the beehive (also from the same time period), and 3) the two shuttles colliding to avoid dropping beehives.
The glider-producing mechanism is unique for queen bees, as far as I know. I know of two others that produce gliders, one of which almost escapes, and one which doesn't even come close.
#C P30 almost-gun, and P30 suicidal gun
x = 87, y = 9, rule = B3/S23
11b2o45bo$10bobo10b2o32bobo$9b3o11b2o31bob2o18bo$2o6b3o15b2o6b2o14b2o
3b2ob2o17bobo$2o7b3o14b3o5b2o14b2o4bob2o16bo3b2o3b2o$10bobo13b2o29bobo
16bo3b2o3b2o$11b2o10b2o33bo17bo3b2o$23b2o52bobo$78bo!
There are several known ways to eat the end beehives. A block is the smallest, cheapest, and most common way to do so. (The block can be on either side of the axis of symmetry, but for all practical purposes, this usually isn't considered important). An eater or similar still-life is another common way.
There are many ways for two shuttles to hit each other so that they destroy each other's eggs (i.e. beehives) without damaging the shuttles. I don't know if anyone has ever made a definitive list of all the ways they can do this, and I'm not sure if anyone has ever posted your particular interaction before.
Incidentally, this would work equally well if the symmetry was reversed - that is, if the rightmost gun was moved down two lines. You can also get similar (but slightly different) mutual cleanup reactions if you move the rightmost gun up 1 or 2 lines.