How you ever lost Moscow and still ended up wining as the Allies?
It was pretty dicey (no pun intended) for a while but in this game the Axis conceded shortly after securing moscow: http://www.axisandallies.org/forums/index.php?topic=11554
(Of course, it helped that Berlin had fallen just before Moscow)
That’s true, if Berlin falls within two rounds of Moscow falling, the allies will almost certainly win. (Kind of depends on how many Japanese forces are left after Russia falls.)