For the ones that never heard of the Lucena position, it a position where we have a
KRP+KR ending, and the side with the extra pawn has his king in front of the pawn.
The problem is that when you try to move the king out of the pawn's way, the enemy rook will deliver annoying checks that will not stop unless you are familiar with the Lucena position and setup your rook in a certain way that will eventually be able to block the checks from the enemy rook.
(example of not knowing how to Lucena)
[fen "1K1k4/1P6/8/8/8/8/r7/2R5 w - - 4 1"] 1. Rd1+ Ke7 2. Kc7 Rc2+ 3. Kb8 Ke6 4. Ka7 Ra2+ 5. Kb6 Rb2+ 6. Kc6 Rc2+ 7. Kb5 Rb2+ 8. Kc6 Rc2+ 9. Kb6 Rb2+ 10. Ka7 Ra2+ 11. Kb8 *
How do I use the Lucena position in my favor?