In second problem 23. ... Be2 is a shockingly bad move. Qe2 or Nf3 would have blocked your attack.
Mating tactic puzzles ;D

Ba6 in response to Qe2, it will have nowhere to go that will save checkmate(as far as i see)
and Nf3 i can simply checkmate Qg2
these two puzzles are from rather recent games i played, i think some these demonstrate usefull tactics, of course they might be flawed (not sure bought second one), but the ideas are pretty cool in my opinion.
if you don't think so then thasts not my problem ;)