[Event "03"] [Site "Margate"] [Round "0"] [White "Thomas"] [Black "Keres"] [Result "0-1"] [ECO "C70"] [Opening "Spanish: 4.Ba4"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Re1 b5 7. Bb3 Be7 8. c3 O-O 9. d4 Bg4 10. d5 Na5 11. Bc2 c5 12. Nbd2 Ne8 13. Nf1 g6 14. Ne3 Bd7 { This and similar variations of the Ruy Lopez differ but little in their general strategy from the positions we have been handling so far. One small difference here is that the Bishop placed on c2 may become very active if White plays Pf4lateron} 15. b4 $1 Nb7 16. a4 { In this case White obtains his open file on the Queenside particularly easily} 16... Ng7 17. h3 Qc7 18. Qd2 Rfc8 { A remarkable preparation for the advance which follows.} (18... f5 {simpler}) 19. Bb2 f5 $5 20. exf5 gxf5 21. axb5 axb5 22. Rxa8 Rxa8 23. g4 $2 (23. c4 { White would have obtained maximum freedom for his Bishops} 23... e4 (23... f4 24. Qd3 $1) 24. Qc3 $1) 23... Rf8 24. Nxf5 Nxf5 25. gxf5 Bxf5 26. Bxf5 Rxf5 27. Qd3 Qd7 28. Re4 {In obtaining this strong square, White has achieved a strategic success, but it is at the cost of his King's safety, and this factor now begins to tell} 28... h5 29. Bc1 Rf7 30. Ng5 Bxg5 31. Bxg5 Qf5 32. Qe3 $2 ( 32. Bh4 Rg7+ 33. Kh2 (33. Kf1) 33... Qg6 34. Bg3 h4 $1) 32... cxb4 33. cxb4 Rg7 34. h4 Nd8 {Now the Knight gets into play} 35. Qe2 Nf7 36. Re3 Nxg5 37. hxg5 h4 $1 {Directed against Rg3} 38. Qxb5 Qxg5+ 39. Kf1 Qg2+ 40. Ke1 Rf7 41. f3 h3 42. Qf1 Rg7 43. Qb5 Qg5 0-1