2b2t (map)

The current 2b2t map was started sometime in February 2011. Before the current map there were an unknown number of different maps that were started and ended from when the server started in (at its earliest) 2010.

Before Beta 1.3, there was a bug in world generation that made the X and Z axis of certain blocks be flipped. This was most noticeable on beaches, where sand and grass collide, making it look like the chunk was rotated. This bug also changed bedrock generation, which means that bedrock in Beta 1.2 and lower is different from Beta 1.3. No chunks on 2b2t use the Beta 1.2 pattern. This is because the bug was already fixed in the server software CraftBukkit before Beta 1.3. In a commit to CraftBukkit from February 9th 2011, during Beta 1.2, the bug was fixed, making any CraftBukkit builds after February 9th use a bedrock pattern similiar to the Beta 1.3 bedrock pattern, but without sandstone. A little known fact about bedrock generation is that it is affected by sandstone, and due to the fact that sandstone didn't start generating until Beta 1.3 it makes the bedrock generation differ in locations where there would be sandstone in Beta 1.3. The chunks near 2b2t spawn matches the bedrock that one of these CraftBukkit builds would generate, and there is no instance of the generation bug, making it fair to assume that 2b2t was started using one of the CraftBukkit builds after February 9th 2011. Additionally, 2b2t spawn also has lapis lazuli ore which was added in Beta 1.2.

Seed
The 2b2t map's current overworld seed is -4172144997902289642. The seed has changed multiple times through the server's long lifespan while keeping the same map. The original seed active when the server was started was also -4172144997902289642, but following the 2011 player corruption on August 8 2011, the seed was changed to -1373982429803982829, most likely due to corruption of the level.dat file. Sometime during version 1.0 the seed was then changed to -4100785268875389365 before being changed back to the original seed (-4172144997902289642) on January 6th 2012. In mid 2013, during Release 1.5 the seed changed again and all dimensions had their seed set to 1434823964849314312. The overworld seed was quickly reverted back to the original, but the other dimensions still remain on this seed.