keypusher: Post 2 of 2:
It is only in the R+P ending that Lasker begins to go wrong. After 36. Kf3? Soltis writes:
<This turns a three-hour game into a four-hour game. After 36. a4! Ra8 37. Rxa8 Rxa8 38. Rc4 and Kf3 Black can call it quits.>
<White's technical problem has grown (41. Rd2 Ra4!). He wants to give up a pawn for all of Black's pawns (42. Rd5+ Kc6 43. Rxf5 Kd6 44. Rh5 Rxa2 45. Rxh7) but 45...Ke5 is not easy.> Surely it's winning, though?
41...Rxa2? 42. Rg7 Ra4 43 Rg5! would have lost quickly, since both black pawns fall.
After 44....f4 things are very interesting. Black has a number of possible drawing plans, including leaving White with only a rook pawn (1...f3 2. gxf3 Rxf3) or reaching a drawn version of the BP+RP ending. But after 45. Ke4!, 45....f3? 46. gxf3 Rxh2 47. Rc7 is a straightforward win.
After 47. h5, Soltis writes, <Black can try to reach the notorious f- and h-pawn ending with 47....f3 48. gxf3 Rh2 49. Rg5 Ke6. However, White wins with 49. g4! because he can answer 48...Rf1 with 49. Ke3 f2 50. Ke2.> In this line I would expect Black to try 49....Ke6 but I think White still wins after something like 50. Rg6+ Kf7 51. g5 Rh1 52. Rf6+. Comments/improvements?
After 48. Rg4?, Soltis writes, <After 48. h6! White wins easily because he can avoid the notorious ending (48....f3) by means of 47. h7 Rh1 50. Kxf3 or allow a winning form of it (49. gxf3 Rh1 50. Kf5! Rxh6 51. Rg6+).> Continuing Soltis' first line above after 50. Kxf3, it does appear that White would win after 50....Ke6 51. Kf4 Kf6 52. Ra7 Kg6 53. g4 Rxh7 54. Rxh7 Kxh7 55. Kf5 Kg8 56. Kg6.
<Counter blunder. After 48....f3! 49. gxf3 Black achieves notoriety. Now the game lasts a mere seven hours.>
After 50. Kf5!
<White's king will reach g6, virtually sealing the point. Because the g-file remains closed Black has no vertical checks to stop the winning plan of h5-h6-h7 and Ra5-a8.>
It's worth noting that Black does reach a version of the BP+RP ending -- just not the right one from his perspective.
Soltis' final comment: <No better was 59...Rh2 60. f4 Rxh5 because 61. f5 leads to a won Lucena position after 61....Rh1 62. Ra8+ Kd7 63. Kf7 Rh7+ 64. Kg6 Rh1 65. f6.> Bogoljubov put up a great fight, but resigned a lot quicker than Topa did today. :-)