B29

B29
3b2o3b$2b2o4b$4bo3b$6b2o$5bo2b2$4bo2bo$b2obo3b$2o4bob$2bobo2bo$7bo$4bo 2bo$5bobo$5bobo$6b2o$6bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 -1/4 -1/4 THUMBSIZE 2 GPS 4 ]]
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Pattern type	Tagalong Spaceship
Number of cells	29
Bounding box	10×17
Direction	Diagonal
Period	4
Mod	4
Speed	c/4
Speed (unsimplified)	c/4
Heat	30
Discovered by	Hartmut Holzwart
Year of discovery	2004
Rules Outer-totalistic rules B3/S23 – B378/S2378 Important rules Conway Life # of rules 24 = 16 Isotropic rules B3-e/S2-cn3-ceky – B34eijkqt5ceky6-ik78/S234centy5-inq6-an78
Glider synthesis Fewest gliders 25† Catagolue-generated RLE b29_synth.rle Uploaded synthesis RLE b29_synth.rle †Can be constructed with 17 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext b29.cells RLE b29.rle
Identifiers apgcode xq4_go217z1rmkg4szon7z21 Pentadecathlon ID 29P4H1V1.1

B29 is a c/4 diagonal spaceship discovered by Hartmut Holzwart in September 2004. In generation 2 it produces an isolated domino spark that can be used to perturb reactions. In terms of its 29 cells, it is the fourth smallest c/4 diagonal spaceship, as well as the smallest c/4 spaceship to not exhibit glide symmetry. There are three ways in which a glider can non-trivially follow a B29, as shown below.

Due to a synthesis completed by Tanner Jacobi in April 2015, B29 is one of relatively few elementary diagonal spaceships with a known glider synthesis.

Two gliders can be seen at the front of the ship, one of these being temporary and the other permanent, making this a tagalong. The other glider does not stay as a glider but still moves like one.

Image gallery

Three ways in which gliders can non-trivially follow a B29 Download RLE: click here

See also

• Crab
• Orion

External links

• B29 at the Life Lexicon

• B29 at Adam P. Goucher's Catagolue

• 29P4H1V1.1 at Heinrich Koenig's Game of Life Object Catalogs