Today's tactics

Let's not lose the habit and keep the tactical eye in form, here are some positions from my own bad experiences, even though I actually escaped from some of them with the help of my opponent. Enjoy!

Hernandez,G (2502)-Castellanos,R (2437)
Magistral Cullera 2004
White to play and win
García,C (2357)-Castellanos,R (2437)
Magistral Cullera 2004
White to play and win
Spraggett,K (2564)-Castellanos,R (2437)
San Sebastian 2004
White to play and win