At move 37, you needed to understand that with the king coming to e3, you cant protect your extra dpawn. So you need to do one of two things: position your king so that after you trade off rooks (he has to trade if he wants the dpawn) that you can win the king and pawn endgame, or use the time to win a different pawn with your rook. Here, it turns out that you can't win the king and pawn endgame no matter what you do, so the correct move was rd4, attacking the bpawn, which cant be defended. Your move, rd6, did absolutely nothing and shows that you weren't aware that there are two ways to win these type of positions. You could get partial credit by moving the king up to e6, since centralizing the king is often enough to win, but here ke6, ke3, ke5, rxp, rxr, kxr and you need to figure out if your king can scoop the pawns on either side of the board. Turns out white should be fine, but the first step is realizing that the rooks coming off is something that you need to prepare for unless you are going to abandon the dpawn and win a different pawn with your rook (which again, is correct here).
Comments on my end game?
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Hi again, I hope I'm not breaking some etiquette here by posting so many games, but I am reading all the comments and following through with looking at the moves you guys suggest to me. Some of you have told me I need to play longer games, not 10 minute blitz games. So I played this 30 minute game.
I'm black. When white makes his move 37. Kf3, the computer has white at -1.48 and I'm up one pawn. Yet I still lost. Is this the kind of end game that is mostly luck, like one person just happens to have a slightly better pawn arrangement and so can promote to Queen faster than the other, or is this the type of end game that is worth studying? In other words, did I mess up or was I going to lose anyways?