Now: Qf4#. Doesn't matter which queen.

Instead, 62...Qe5#.

Which is what I would've done.

Instead, 64...Qhf4#.

Instead, 65...Qhe4#.

Best was 67...Rd3# which is also mate.

Instead, 68...Qa6# or 68...Qb2# or 68...Qb4#. The first should have been easy for you to spot.

I couldn't have said it better then ION.

Instead 69...Qhc4#. Still and all, Black is gradually tightening the screws. Leaving aside the missed one-move mates, this is pretty much how to force an eventual checkmate.

True, but it's also why you must be weary of stalemates, as well, Erika.

Good enough to force checkmate nest move however White plays...