[Event "EndGames"] [Site "www.masterchessopenings.com"] [Date "2015.01.03"] [Round "0"] [White "King + Rook"] [Black "King"] [Result "1-0"] [FEN "4k3/8/8/8/8/8/8/R3K3 w Q - 0 1"] 1.Ra7 { Confining the Black King to the back rank. Why? } Kd8 { Heading towards the rook. Rooks are vulnerable from attack from the diagonal. } 2.Kd2 Kc8 3.Kd3 Kb8 4.Rh7 { If } (4.Kd4 Kxa7 { Game is drawn due to insufficient material }) 4...Kc8 5.Kd4 Kd8 6.Kd5 Ke8 7.Kd6 Kf8 { If } (7...Kd8 8.Rh8# { Checkmate! }) 8.Ke6 Kg8 { Attacking the rook again! } 9.Ra7 Kf8 10.Rb7 { If } (10.Kf6 Ke8 { running away and increasing the number of moves. }) 10...Kg8 11.Kf6 Kh8 12.Kg6 { Now the Black king must turn back! } Kg8 13.Rb8# { Checkmate! The White King covers the three squares in front and the Rook covers the back rank. As it is the back rank three squares are short. If the Black King is in the middle of the board, he could have got some more options for moving! } 1-0