How can white mate black in 4 moves?

Question

In this endgame position, how can black be mated in 4 moves? Being a beginner, I am finding it difficult

[FEN "8/8/6R1/8/8/4K2p/7k/8 w - - 0 1"]

Please check online tablebase. – SmallChess May 20 '18 at 6:22 — SmallChess, May 20 '18 at 6:22

SmallChess · Accepted Answer · 2018-05-20 10:02:35Z

6

Use the king to keep the black king in the corner and force Black into zugzwang:

[FEN "8/8/6R1/8/8/4K2p/7k/8 w - - 0 1"]

1.Kf2 Kh1 2. Re6 Kh2 (2... h2 3. Re1) 3. Rh6 Kh1 4.Rxh3

SmallChess

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answered May 20 '18 at 8:34

Glorfindel♦

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There's something wrong with my FEN string but I can't figure it out (am on mobile). – Glorfindel♦ May 20 '18 at 8:39
I think you missed a line. – SmallChess May 20 '18 at 10:03
Great. It was mazing to learn a new technique.thanks – Rafiq May 20 '18 at 15:21
1

@Rafiq you're welcome. You can 'accept' this answer by clicking the checkmark next to it. – Glorfindel♦ May 20 '18 at 15:23

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