The mode is called "Capture" in Sauerbraten; you don't carry around flags,
your capture bases :)
Regarding your question - how about checking it out yourself?
But apart from that ... why do you think Nieb gave it a "Capture" tag?!?
Anyway : Yes, it's a nice compact capture map ... very nice,
I'll really like to have some matches on this map - it seems compact enough for even just 2on2,
so it nicely fits the (hitherto empty) slot of "low playercount capture maps".
Since it's a pure OGZ, no CFG, it's also perfectly suited for spontaneous distribution;
simply vote for this map on a server - if players are missing the map,
vote into coop-edit and sendmap it.
Great work Nieb & "Helpers" ;)