My son (9) played this game at a tournament against a USCF 1600-ish player. He was cruising (at least he thought so--it appears his opponent failed to exploit an early vulnerability) and up two pawns in the endgame. Then he just froze and couldn't figure out the way forward. He ended up sacrificing his passed pawn to (he hoped) win on the king side but that fizzled, then he lost another pawn, and ended up in a K+R vs K+R drawn position.
He's untutored except for youtube so it's no surprise he struggled with strategy.
What would have been a good plan for him?
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I'm no expert on endgames and I don't know if it would be winning but I would move Kd2 to kick the rook, Ra7 to attack black's kingside pawns, and then push the kingside pawns and try to exploit the fact that black has to defend against both a queenside and kingside pawn majority.
try make a passed pawn from the king side.Play Ra7 first to cut of the king.Maybe he should have player Ra7 earlier.Then push kingside pawns with help of king.Also it would be good idea to play c4 and put the bishop on d5.
first of all if he was to promote that passed pawn he should've blocked d file with a rook so that the kimg cant join the defenSe.
Why does white resign on move 33? White is winning: 2 pawns up and bishop versus knight. The plan is simple: activate the rook, king, bishop. Trade rooks if possible, do not trade bishop for knight, do not trade pawns. Advance the passed pawn.
The main problem after move 33 is that the black rook is active behind the passed pawn; the white rook is passive beside the passed pawn. So first is to activate the rook, offering rook trade if possible. Also note the c-pawn is very important. If white loses the c-pawn, then the 3 versus 2 structure leads to a drawn rook ending if bishop and knight were exchanged.
White didn't resign, but the notation got messed up, and he did eventually lose a completely drawn position.
I’m not sure about 22 Rxe8, with 22 Ree7 white doubles and threatens Rxg7, and if black exchanges rooks then he’s left with his passive rook, instead of activating it in the game.
I’m also not sure why black didn’t take 30... Rxc3, tell him that giving up the c pawn (I’m assuming) was a very bad idea, because with the pawns only on one side, even a pawn up it’s almost a guaranteed draw.
First he can use the strategy "Rooks belong behind passed pawn":
Ideally he would want to place king on d2 and then bring the rook to c2.
Then, he can use the strategy of "pawn majority", which means pushing the kingside pawns, ideally to create a passed pawn without damage to the pawn structure (i.e. ideally no isolated pawns).
Then, he can use the strategy of "use the king in the endgame" and advance his king up the board.
If given the opportunity, he can trade rooks using the strategy of "trading pieces but not pawns when up material". Going into rook vs rook endgame may not be advisable since "rook endgames are often drawn".
The above quotes are some general strategies (may not be optimal in all cases). It is easier said than done though, black's knight is quite a strong blockader. I tried playing against the AI in that position, and against perfect play it is not easy at all to convert the win. (In many positions, even if White is two pawns up Stockfish can draw the position as black.)
In principle. white should not lose though unless white makes a terrible blunder.
The first bit of knowledge in this one is the pure rook ending. Teach him how to make the draw with 3 pawns vs 2 - (use the current pawn formation on the king's side) where each side has one rook only. Once he knows that this is a draw (and how it is a draw) he will work harder to either save his c pawn or make sure he wins the g or h pawn when black takes the c pawn.
As for plans - I think the above comments were pretty good. Maybe I would add that an active rook would serve him better than a rook on a3 here - so if he can pursue one of the black pawns with it, that would be nice.
Think of the c pawn as a weakness that black needs to defend - and then find a second place on the board to attack while black defends this pawn from advancing.
Good luck!
I'm not an expert on endgames either, but here's a couple things that seem sensible to me:
-Try to advance the pawns on to light squares. This means your Bishop can easily defend them and free up your rook. Try to keep the king on dark squares if possible to make it difficult for you to be forked.
-White should try to aim for a trade of rooks. Knight vs. Bishop with the extra pawns should be easily winnable since the knight can't guard both sides of the board whereas the Bishop can.
Since you have the position in the analysis board anyway, try having him play it against the engine and experiment with some of the ideas discussed.