[Event "New York"]
[Site "?"]
[Date "1924.??.??"]
[Round "?"]
[White "Janowski,D"]
[Black "Reti,R"]
[Result "0-1"]
[Annotator "Lopez "Battle Royale""]
[ECO "A48"]
[PlyCount "88"]

1. d4 Nf6 2. Nf3 g6 3. h3 { This move makes absolutely no sense. Black has no designs on g4. } 3... Bg7 4. Bf4 b6 { This move has a dual purpose: to allow ...Bb7 and to support ...c7-c5. } 5. e3 c5 6. c4 { Bringing about a sort of Queen's Gambit position. } 6... cxd4 { Trading a flank pawn for a more valuable center pawn. } 7. exd4 O-O 8. Nc3 { Janowski would be better off developing his Kingside Bishop, then castling his King out of the center. } 8... d5 9. Be2 Bb7 10. b3 { Now White has some serious dark-square weaknesses on his Queenside. Remember that the Black g7-Bishop bears down on this side of the board (even though it's temporarily blocked by the f6-Knight). } 10... Ne4 11. Rc1 ( 11. Nxd5 Bxd5 12. cxd5 Nc3 13. Qc2 Nxe2 14. Qxe2 Qxd5 15. O-O Nc6 { Black has a centralized Queen and a strong fianchettoed Bishop. (Variation by Alekhine) } ) 11... Nxc3 12. Rxc3 { The Black dark-squared Bishop keeps getting stronger. } 12... dxc4 13. bxc4 { Look at the pawn structure here. Black has two pawn islands, White has three. It will be harder for White to defend his pawn weaknesses. Note in particular the lonely pawn on a2. } 13... Nc6 { Everything now centers on d4. } 14. Rd3 Na5 { Black gets the initiative } 15. c5 { Janowski advances the pawn (remember, this is one of the key ways of protecting a menaced pawn), but in doing so he leaves a hole on d5. } 15... Qd5 { Reti is quick to exploit the new weakness. } 16. O-O Qxa2 17. Re1 { Janowski would be better off playing Ne5 to centralize the Knight and try to get some counterplay. He's playing too passively. } 17... Qd5 18. Bf1 { The point of 17.Re1. Janowski is trying to rearrange his pieces to get them to better squares. But does he have time for this? } 18... Ba6 19. Rc3 Bxf1 20. Kxf1 { When you're ahead in material, trade pieces (not pawns). Every piece that comes off the board brings you closer to an endgame (in which your pawn advantage should win the day). } 20... Nc6 { Blocking the White c-pawn and clearing the way for a general Queenside pawn advance. } 21. Be3 Rfd8 22. Qc1 { We really can't figure out why Janowski didn't play cxb6 while he had the chance. This would create a Black pawn weakness for him to attack. } 22... b5 { Too late now. White has connected passed pawns (which will be very hard to stop). } 23. Rd1 b4 { The move ...a5 will follow and now White is in a world of trouble. } 24. Rc2 a5 25. Ng1 { Janowski fools around repositioning his Kingside pieces. Doesn't he see the danger on the Queenside? } 25... a4 26. Ne2 b3 { Reti puts White off-balance with another threat } 27. Rcd2 ( 27. Rc3 { This wouldn't help White hold things together. } 27... e5 28. Rcd3 a3 { The pawns continue marching. } ) 27... a3 28. Nf4 b2 $1 { Reti is unconcerned by the threat against his Queen -- he'll have another soon enough. } 29. Qc3 ( 29. Nxd5 bxc1=Q 30. Rxc1 Rxd5 ) 29... Qf5 { Aiming at the promotion square. } 30. Nd3 Bxd4 31. Bxd4 Rxd4 32. Kg1 ( 32. Nxb2 Rxd2 33. Qxd2 a2 ) 32... Rxd3 { And now Reti sees a way to win a piece. } 33. Rxd3 Qxd3 34. Qxd3 a2 35. Kh2 { To prevent promotions with check along the back rank. } 35... a1=Q 36. Rb1 ( 36. Rxa1 bxa1=Q { Black is up much material. } ) 36... Rb8 37. h4 { It's better for White to leave the new Black Queen alone -- if he captures with the Rook, Black just creates a new Queen (in effect, White gives up a Rook for a mere pawn and is down a Rook and minor piece). } 37... Qa4 38. g3 Qd4 39. Qc2 ( 39. Qxd4 Nxd4 { And White is doomed to a passive game. } ) 39... Qf6 40. Kg2 h5 41. Kg1 Nd4 42. Qd1 Qf5 43. Kg2 ( 43. Qxd4 Qxb1+ ) 43... Qxc5 { Reti will have no trouble now. White could resign at any time. } 44. Qd2 Qd5+ { Janowski resigns as he sees that Reti will have no trouble forcing the win (see the variation for a possible continuation). } ( 44... Qd5+ 45. f3 Rb3 46. Qf2 Nxf3 47. Kh3 Qf5+ 48. Kg2 Qxb1 49. Qc5 Nxh4+ 50. Kh2 Qf1 51. Qc8+ { Forced, otherwise 52.Qg2#. } 51... Kh7 52. gxh4 { Eliminating the immediate mate threat, but Black wins easily anyway. } 52... Qf2+ 53. Kh1 b1=Q+ 54. Qc1 Qxc1# ) 0-1