# A deceptively simple eight piece endgame

I am in the dark about the following endgame, with white to move. May someone with FinalGen (or a powerful engine) give me a response? Is it a White win or a draw?

``````[FEN "8/1k6/5R2/P7/1KP4p/5P2/8/5r2 w - - 0 1"]
``````
• Not sure this is such a useful question on a question/answer site like this. Why not just check yourself with Finalgen? Commented Jan 19, 2021 at 3:03
• Unfortunately I do not have this instrument Commented Jan 19, 2021 at 9:02
• For what its worth, my Rybka checks, and then trades pawns, calling it 2.78 at about 33 depth.. which is pretty winnish, right? I dunno. I can't remember but I think I don't have the endgame tablebases installed, and I bet it would just know immediately if I did. Commented Jan 19, 2021 at 10:06
• I guess I should specify, Rybka checks with Bc6... here: 1. Rb6+ Ka7 2. Rh6 Rxf3 3. Rxh4 Rf1 4. c5 Kb7 5. Kb5 Rb1+ 6. Rb4 Rg1 7. a6+ Ka7 ... still calling it 2.78 pawns ahead, at 34 depth Commented Jan 19, 2021 at 10:09
• I think White has no better than trade f against h immediately (otherwise, Black gets the P for nothing, also a draw by Syzygy), and the resulting endgame a+c is usually draw. Thus it is easy to assign Justin's variant even with Nalimov: 3...Rf1? loses, only draw 3...Kb7. Commented Jan 19, 2021 at 10:18

Stockfish 14+ NNUE evaluates this position as +0.5 (depth = 62, 22036k nodes/s).

The principal variation (see below) leads to a theoretical draw according to the 7-piece tablebases.

``````[FEN "8/1k6/5R2/P7/1KP4p/5P2/8/5r2 w - - 0 1"]

1. Rf7+ Ka6 2. Rh7 Rxf3 {Theoretical Draw according to the 7-piece tablebases} (2. Rf6+ Kb7 3. f4 h3 4. Rb6+ Kc7 5. Rh6 Rxf4 {Theoretical Draw according to the 7-piece tablebases})
``````

Other lines suggested:
From Justin Stafford's comment: 1. Rb6+ Ka7 2. Rh6 Rxf3 3. Rxh4 (theoretical draw)
From David's answer: 1. Rh6 Rxf3 (theoretical draw)

No need for engine analysis, that's a win for White since that parciular a+c pawn endgame is won. White can simply trade the other two pawns with Rh6

• That's not true, Rh6 Rxf3 Rxh4 is a well known theoretical draw. Black defends this kind of position by putting the king on the short side (i.e. a file in this case) and then checks with the rook whenever the white king steps out from the c pawns cover. Commented Jan 19, 2021 at 10:46
• @koedem Although the position after that line is a draw, Black must play exact. If Black took your advice literally and played Ka6, Ka7, or Ka8 the next move, White would have a forced win, according to the lichess tablebase.
– D M
Commented Jan 19, 2021 at 11:44
• @DM yes, this was not a suggestion for specific moves, it is the general idea of how to hold this endgame. It is in fact quite difficult to defend / easy to screw up as a human. Commented Jan 19, 2021 at 12:56
• OP has asked for theoretical status. 1. Rh6 Rxf3 is indeed a theoretical draw by the 7 piece tablebases. However, I also appreciate the practical considerations of playability, though the answer could be improved with more discussion for these considerations. Commented Nov 26, 2021 at 22:15