[Event "New York 1937"]  [White "Alexander Kevitz"]  [Black "Frank Marshall"]  [Result "0-1"]  [ECO "E54"]  [Annotator "ATH"]  [PlyCount "50"]  [EventDate "1937.??.??"]  [SourceTitle "StarBase 4.56"]  [SourceDate "2004.11.04"]  [SourceVersion "1"]  [SourceVersionDate "2004.11.04"]  [SourceQuality "2"]   1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4  {A standard position in the Rubinstein Variation of the Nimzo-Indian} a6 $5 {  A minor side line} (8... cxd4 {is the main line}) 9. dxc5 $6 ({The main line  of this side line is} 9. a3 Bxc3 (9... Ba5 {is only very slightly worse  according to Stockfish}) 10. bxc3 b5 11. Be2 Bb7 (11... c4 $5) 12. a4 $14) 9...  Bxc5 10. Qc2 (10. Qe2 {is better, e.g.,} b5 11. Bb3 Bb7 $11) 10... b5 11. Rd1 (  11. Ne4 $5 Nxe4 12. Qxe4 Qe7 13. Bd3 (13. Qxa8 $2 Bb7) 13... f5 $11) 11... Qe7  (11... Nbd7 $5) 12. Bd3 Bb7 13. Ne4 Nbd7 14. Bd2 (14. Nxc5 Nxc5 15. Ne1 $11)  14... Rac8 15. Nxc5 (15. Bc3 Nd5 16. Nxc5 Qxc5 17. Bxh7+ Kh8 18. Rd4 Nxc3 19.  bxc3 Bxf3 20. gxf3 Nf6 21. Bd3 $11) 15... Bxf3 16. gxf3 Rxc5 17. Qb3 Rg5+ (  17... Rh5 $1) 18. Kh1 $6 (18. Kf1 $11) 18... Nc5 19. Qc2 (19. Qa3 $2 Rh5 20.  Be2 Qd6 21. f4 Qd5+ $19) 19... Rh5 (19... Nxd3 $1 20. Qxd3 $15) 20. Ba5 $2 (20.  Be2 Qc7 21. f4 Qb7+ 22. Kg1 Rh6 23. f3 Na4 $11) 20... Qb7 21. Rg1 $2 (21. Be2 {  is much better but still hopeless after} Ng4 $1 $19) 21... Qxf3+ 22. Rg2 Nxd3  23. Qxd3 Ng4 24. Kg1 Nxf2 25. Rf1 (25. Rxf2 Rg5+ 26. Kf1 Qh1+ 27. Ke2 Qxa1 $19)  (25. Qf1 Nh3+ 26. Kh1 Qe4 27. Qb1 Qa8 28. Qe1 Rg5 29. e4 Rxg2 30. Kxg2 Nf4+ $19  {holds out longer but to no avail}) 25... Qxg2+ $1 0-1