use only this scheme (limited girder pack)
empty map
Do not block, it is considered a cow. In case of a cow, you have to skip once. If you cow twice, or don't skip, you loose. (it mean if your opponent cant movie in any1 girder and/or cant shot to something - its a block) Basically, follow this to determine what are blocks and what aren't. If you're still unsure, though, ask the moderator.