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x = 9, y = 15, rule = B3/S23 bo$obo$bo8$8bo$6bobo$5b2obo2$4b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Pattern type Methuselah
Number of cells 13
Bounding box 9 × 15
Lifespan 29055 generations
Final population 1623
L/I 2235
F/I 124.8
F/L 0.056
L/MCPS 1383.6
Discovered by Andrzej Okrasinski
David Bell
Year of discovery 2005

Lidka is a methuselah that was originally found in the 15-cell form shown below by Andrzej Okrasinski, which has a lifespan of 29053 generations. The 13-cell grandparent with lifespan 29055 shown to the right was soon after found by David Bell. Simon Ekström identified a 13-cell predecessor with a 9×6 bounding box and a lifespan of 29126 on March 8, 2017.[1]

Incidentally, the 9-cell pattern in the lower right corner of this pattern, fitting in a 5×5 bounding box, is also a methuselah in its own right: it stabilizes after 595 generations to a constellation of 182 cells.

Stable pattern

The stable pattern that results from Lidka has 1623 cells and consists of 135 blinkers (including seven traffic lights, three Interchanges), 102 blocks, 57 beehives (including two honey farms), 28 gliders, 18 loaves, 15 boats, six ships, five ponds, two tubs, two ship-ties in the form of a fleet, one toad, one beacon, and one long boat.[2]

29055M final.png
Generation 29055

Image gallery

See also


  1. Simon Ekström (March 8, 2017). Re: Long-lived methuselahs (discussion thread) at the forums
  2. New Record Methuselah at Game of Life News. Posted by Heinrich Koenig on July 14, 2005.

External links