Does white win or is it a draw?

[thewhip]

[fen]8/8/8/3k1n2/R6P/2Bp4/4bK2/8 w [/fen]

The following endgame was reached where black resigned. But isn't it a draw ending?
White moves.

[Uri Blass]

No it is not a draw.

Ra5+ Ke4 Re5+ Kf4 Rb5 is winning for white.

[Eelco de Groot]

After 1.Ra5+ Ke4 best four moves (they are probably interchangeable) and no tablebases used:


[fen]8/8/8/R4n2/4k2P/2Bp4/4bK2/8 w - -[/fen]

Engine: Blue Marlin 14.9a (512 MB)
gemaakt door dorsz and the Stockfish developers (see

56 278:42 +7.44 2.Ta4+ Kd5 3.Ta5+ Ke4 4.Te5+ Kf4
5.Tc5 Ke4 6.Ta5 Ld1 7.Te5+ Kf4 8.Tc5 Ke4
9.Tc8 d2 10.Td8 Kf4 11.Txd2 Lh5
12.Lf6 Lg4 13.Td8 Lh5 14.Td5 Le8
15.Td1 (21.701.738.396) 1297

56 278:42 +7.44 2.Tc5 Lh5 3.Ta5 Ld1 4.Te5+ Kf4 5.Tc5 Ke4
6.Tc8 d2 7.Td8 Kf4 8.Txd2 Lh5 9.Lf6 Lg4
10.Td8 Lh5 11.Td5 Le8 12.Td1 La4
13.Tg1 Pd6 14.Lg5+ Kf5 15.Lc1 (21.701.738.396) 1297

55 278:42 +6.94 2.Te5+ Kf4 3.Tc5 Ke4 4.Tb5 Pd6 5.Ta5 Ld1
6.Tc5 Pf5 7.Tc8 d2 8.Td8 Kf4 9.Txd2 Lh5
10.Lf6 Lg4 11.Td8 Lh5 12.Td5 Le8
13.Td1 La4 14.Tg1 Pd6 15.Lg5+ (21.701.738.396) 1297

55 278:42 +6.94 2.Ta6 Kd5 3.Ta5+ Ke4 4.Te5+ Kf4
5.Tc5 Ke4 6.Ta5 Ld1 7.Te5+ Kf4 8.Tc5 Ke4
9.Tc8 d2 10.Td8 Kf4 11.Txd2 Lh5
12.Lf6 Lg4 13.Td8 Lh5 14.Td5 Le8
15.Td1 (21.701.738.396) 1297

[thewhip]

After analyzing the endgame I came to the conclusion that I had missed the move Re5+ that leads to a winning position. My mistake was taking the rook to a8. Thanks for the contributions.