Board Thread:Special Events/@comment-25730832-20150427153606/@comment-26348726-20150430220850

Well, this is what wikiwiki testing has come up with so far:

戦艦＋重巡＋航巡＝4以上でA? 重巡＋航巡＝3以上でA?

Your fleet compos seem to fit in with these rules at least, since you used 4CA. This also explains the 4FBB + 2CVL always going north too.

So so far, it appears that CVLs are unrelated :P