Almost knightship

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Almost knightship
4$16bo$11b2o2bo$11bob2o$10bo5b2o$6bobo2bo$5bo$5bo3bo2b3ob2o$5bo3bo4bo$ 10bob2o$6bo3bob2o$5b2ob3o$9b2obo$5b2o2b3o$5b2obo$8b2o4b2o$6b3o$7bo2b3o b2o$8b2o2b2o$9b3o! #C [[ TRACKLOOP 6 -1/6 1/3 THUMBSIZE 2 ]] #C [[ THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Pattern type Miscellaneous
Number of cells 67
Bounding box 13×19
Discovered by Eugene Langvagen
Year of discovery 2004

Almost knightship is a partial spaceship discovered by Eugene Langvagen on March 23, 2004. It would have been an elementary knightship if two cells at the back end were not incorrect after the 6th generation.

It provides evidence that small elementary knightships may exist within a considerably small bounding box.

Several more small almost knightships were found by Tomas Rokicki in February 2018, using a SAT solver.[1] Further searching by Adam P. Goucher based on these partials led to the finding of a true elementary knightship, Sir Robin.

Image gallery

generation 0 (left) and generation 6 (right) show that the pattern is different by only two cells


4$16bo$11b2o2bo$11bob2o$10bo5b2o$6bobo2bo$5bo$5bo3bo2b3ob2o$5bo3bo4bo$ 10bob2o$6bo3bob2o$5b2ob3o$9b2obo$5b2o2b3o$5b2obo$8b2o4b2o$6b3o$7bo2b3o b2o$8b2o2b2o$9b3o! #C [[ THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME 6 GRID GRIDMAJOR 0 THUMBLAUNCH GPS 6 THUMBSIZE 2 WIDTH 480 HEIGHT 480 ]]
Evolution (click above to open LifeViewer)

See also


  1. Four new almost-knightships CGOL (discussion thread) at the forums