optimal play: Nice pun.
Crewe did indeed maintain a steady control throughout this game, only accelerating at 27.b5! & 29.Bb5!
This was his first win in the tournament, and must have given him some confidence, since he scored a further two wins, managing to climb off the bottom of the table by tournaments end.
Also this is the second pun involving a game by Crewe
Gossip vs J E Crewe, 1887
5...Ne4 seems to have been a TN by Tullidge back in 1887
This move was used by Lasker against Marshall 20 years later in their world championship match, hence the name, Queen's Gambit Declined: Lasker Defence.
Of course poor ol' Tullidge can't compete with the great Emanuel Lasker when it comes to getting credit for introducing a line of defence, especially since he didn't even win this game!
<shivasuri4: <Eusebius>, if Black plays a waiting move like g6, Kf5 or Kf7, White plays 38.Rxe6 followed by 39.Rd6+ and 40.Rxc6. If he plays Bb5 or Be8, White captures the rook, and plays Rd6 followed by c6, breaking through.> Most obvious after 37.fxe3 seems to be 37...Bb5 then 38.Rxe6+ Kxe6 39.Rd6+ Ke7 40.c6 bxc6 41.b7 Kxd6 42.b8=Q+ etc