[Event "Semmering (Austria)"] [Site "Semmering (Austria)"] [Round "0"] [White "Eliskases"] [Black "Flohr"] [Result "0-1"] [FEN "2rr4/pp3pkp/3n2p1/3Pp3/4P3/5B2/P3RPPP/R4K2 w - - 0 23"] {One majority mobile, the other having already produced a passed pawn Although this position is really an endgame, we can draw from it some important conclusions about the handling of the middlegame. The point is that such an endgame is in favour of the side which can block the protected passed pawn with a Knight and simultaneously bring his own majority into action} 23. Rb1 Rc4 24. g3 Rdc8 25. Bg2 Rc1+ {Black takes his taks too lightly. All sorts of prepatory moves ought to have been made first: ... Kf8-d7, ... Pb5} 26. Rxc1 Rxc1+ 27. Re1 Rxe1+ 28. Kxe1 {Although Black is still better placed, he has squandered part of his avantage. His Rooks were better posted than White's, particularly with regards to the pressure he could have put on White's e-pawn} 28... f5 29. f3 {Otherwise the d-pawn would have been isolated} (29. f4 Kf6) 29... fxe4 30. fxe4 b5 31. Kd2 a5 32. Kd3 Kf6 33. Bf3 Ke7 34. h4 h6 35. Bd1 Kd8 $2 (35... a4 36. Bc2 Kd8 37. Kc3 Kc7 38. Kb4 Kb6) 36. a4 $1 bxa4 (36... b4 37. Bc2 {Black can get no futher}) 37. Bxa4 Kc7 38. Bc2 Kb6 39. Kc3 Kb5 40. Kb3 Kc5 41. Ka4 Nc4 42. Bb3 $2 (42. Bb1 {The right move, after which thanks to his protected passed pawn White can just hold on} 42... Nd2 43. Bd3 Kd4 44. d6 $1) 42... Nd2 43. Bc2 Nf1 $1 {Wins the g-pawn} 44. Kxa5 (44. g4 Ne3) 44... Nxg3 45. Ka4 Nh5 46. Kb3 Kd4 47. Kb4 Nf6 48. d6 g5 49. hxg5 hxg5 50. Kb5 g4 51. Bd1 g3 52. Bf3 Ke3 53. Bh1 Kf2 54. Kc6 g2 55. Bxg2 Kxg2 56. d7 Nxd7 57. Kxd7 Kf3 0-1