Lawrence: 4...e5 was weak, 4...f6 would have been much better.

13...0-0-0(...f6), 18...e8(...c8), and 37...ac8(...f5) aggravated matters. (Junior 8)

F. Reinfeld, "Tarrasch's Best Game of Chess", London 1947, pages 169-71: - (i) After 17... Kxd8: "Tarrasch's little combination has given him a winning endgame. An agile Rook and two Pawns are more than a match for two awkwardly placed Knights which are incapable of cooperation. White's goal will now be two united passed Pawns on the Queen's side, but first he will improve the position of his King and reduce the Knights to virtual helplessness." - (ii) About 20. Kc4: "The King is strongly posted here, as will be seen." - (iii) About 27. Rd3!: "Black must either yield the open file or else permit an exchange which will make clear the helplessness of his Knights." - (iv) About 29. a5: "The advance of the Pawn practically stalemates one of the Knights." - (v) After 31... Na7: "[...] Now that one of the Knights cannot move, the other Knight must be dislodged by means of c4." - (vi) About 36. Ra1: "The Rook has completed its work on the a-file; the occupation of the seventh rank is now in order." - (vii) About 38. Kc5: "The King is now posted for the kill."

pferd: In Reinfeld's book he has the correct move 37 for Black: Ndc8. In response to 37...Nac8 White has simply 38.a7

So the position at move 41 is:

click for larger view

This makes a nice puzzle, (with White in check!) because after the obvious 41.Rxd7+ Kxd7 White wins, not with the tempting 42.Kb6? but 42.b5

White could even lose with 42.Kb6? Nc8+ 43.Kb7 Nd6+ 44.Kb8 Nxc4 45.a7 Nb6 46.Kb7 Na8! 47.Kxa8? (47.Kb8 draws) Kc7 and Black wins.