Question about Mario Bros. for NES

[arkazal]

I'm... extremely confused about this one. The DAT has 3 entries for this (from what I can see). They are:

Mario Bros. Classic (Europe) [A1C0DA00]
clones:
Mario Bros. (Europe) (Rev A) [2BF0F9C5]
Mario Bros. (World) [C4C3949A]

So... we have 3 different checksums, and yet we're calling the third one "World"...? I've never seen a case where World was ever given to something that differed in any way. Actually, I never even see two countries combined if the checksums are different. How did Mario Bros. get World when not every version in the world is the same? I guess it wouldn't be so confusing if Mario Bros. (World) weren't considered a clone of Mario Bros. Classic... but since we're essentially calling them the same game, how is it the same throughout the world? "Mario Bros." was not released in Europe, correct?

I guess I'm having a hard time understanding what Mario Bros. Classic is. The DAT says Europe, but bootgod's only profile for it says Germany. That's also the only one that has checksum A1C0DA00. So maybe it's the "Europe" part I'm confused about...? Anyway, any information as to what "World" really means would be nice... especially since this is actually labeled "JU" in GoodNES.

[BigFred]

C4C3949A

http://bootgod.dyndns.org:7777/profile.php?id=2359 Europe
http://bootgod.dyndns.org:7777/profile.php?id=1491 Japan
http://bootgod.dyndns.org:7777/profile.php?id=1099 USA

about the europe-confusion: every european country counts as europe if it is not a translation specific for this region.