Problem # 62145. In this problem, I find the move of rook b2 - d2 better than b2-g2. The last move creates problems of strong pawns, after the black Queen qd4 move... and the game can drag on...
Rb2 wins you the knight, and the d-pawn can be dealt with later by Rd1.
lichess.org/training/62145If the rook doesn't move to g2, Black has Qg6, defending the knight.
After Rg2 Qg6 Bxh5 Qxh5 White has g6! winning large material.
Yes I wrote Rb2 but obviously meant Rg2, Rb2 is not even a legal move as the rook is already there.