1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Bd3 Possibly Ne2 is more aggressive  5...Bb7 6.Nf3 O-O Black has quite a wide choice here, 6...Ne4!? being the most popular. Other choices are 6...c5 and 6...Bxc3+  7.O-O c5 8.Na4!? Forcing an exchange of pawns in the centre, after whlch White's central pawn structure is slightly superior; but this is counterbalanced by the loss of time involved tn the knight move. ( A similar loss of time is entailed by 8.a3 Bxc3 9.bxc3 Be4! 10.Be2 Nc6 11.Nd2 Bg6 12.f3 d5  ) ( Perhaps best is  8.Bd2!? as in Gligoric-Kaplan 1974 (Informator 18/590). ) 8...cxd4 9.exd4 Be7 10.Re1 In order to be able to answer  (10.Re1 d5 with  11.c5 bxc5 12.dxc5 Nfd7 ( or 12...Nc6 13.Bf4 ) 13.b4 and 14 Nb2  ) ( If 10.Re1 Bb4 then   11.Bd2 Bxd2 12.Nxd2 Nc6 13.Nf3 and White consolidates his superior central position.  ) 10...d6 11.Bf4 This natural developing move is somewhat innocuous and in the end the bishop is harried away from any useful square. If White intends in any event to play b2-b4, perhaps he should do so now.  11...Nbd7 12.Rc1 Rc8 13.b4 Finally preventing ...d5 since then White obtains the queenside majority with c5, But for a move or two the queenside is loose and, while White is re-organising it, Black develops a kingside initiative.  13...g6 14.a3 Nh5 15.Bh6 Re8 16.Nc3 Ng7 17.Be4!? Although White has an advantage in space, he seeks exchanges which will reduce its effect! But Black's adroit manoeuvring has blunted any conceivable initiative White might take and the threat is 17...Nf5, exchanging one of White's bishops for the knight.  ( If 17.Bf4 then  17...g5! 18.Be3 (18.Bd2 Nf5 ) 18...f5 with a kingside attack ) 17...Bxe4 18.Nxe4 Nf5 19.Bf4 Nf6 20.Nxf6+ Bxf6 21.Qd3 h5 White still has a slightly superior central position and chances on the queenside. To maintain the balance, Black must threaten counter-measures on the kingside.   22.a4 g5 23.Be3 Kg7 24.Nd2 g4 25.d5?! A rather nervous reaction which is the cause of much trouble later on. since it opens up the black squares to the enemy forces.  (25.Nb3 intending 26 Bf4 was preferable ) 25...Nxe3 26.fxe3

The alternatives are not attractive either. (After 26.Rxe3 exd5 27.Qxd5 Rxe3 28.fxe3 Qe8 ) ( or 26.Qxe3 exd5 27.Qxe8 Qxe8 28.Rxe8 Rxe8 29.cxd5 Bg5 followed by 30...Bxd2 and 31...Re4 White falls badly behind in the endgame ) 26...Be5 27.Re2 Qh4 28.Nf1 Rc7 29.Rcc2 Rec8 30.e4 Connecting his pawn chain and preparing Ne3.  30...a5?! As it turns out, this move weakens Black's b6 as much as White's c4. On the other hand the fixing of White's queenside pawns makes them much easier targets for a marauding rook or queen, so the move is very tempting. From now on White must at all costs avoid the exchange of queens, slnce the balance of weaknesses at c4 and b6 would then be lost.  31.b5 Qg5 32.Ne3! Bf4 33.Nf1 Qe5 34.g3 An important decision; lt gives the king more 'air' but risks the thrust ...h4. White reckoned that his 'second rank defence' would repel boarders if the kingside was opened.  34...Bg5 35.Kg2 Rh8 36.Ne3! Bxe3!? The knight attacks the g-pawn so ...h4 is not possible ( and if 36...Rh6 37.Rcd2 Rd7 38.Rd1 Rf6 39.Rf1 ) ( I didn't feel happy since Black had so many different ways of continuing. But forseeable plans I could deal with were 1) 36...Kf8 intending Ke7 -d7 - c8 - b7  37.Rcd2 Ke7 38.dxe6 fxe6 39.Nd5+! ) ( and 2) 36...Bxe3 37.Qxe3 h4 38.gxh4! (38.Qxb6 gives Black better chances ) 38...Rxh4 39.Qg3 Qxg3+ 40.Kxg3 Rh8 41.e5! ) 37.Qxe3 Rhc8!

A good move if followed up correctly; White seems unable to hold his pawn phalanx intact.  38.dxe6! White must exchange pawns ( If 38.Qd3 Re7 followed by 39...Rce8 when the pressure on the e-file is unbearable ) ( If White accepts the sacrifice by 38.Qxb6 then  38...exd5 39.exd5 Rxc4!! 40.Rxe5 Rxc2+ 41.Kf1 dxe5 42.d6 otherwise 42...Rb2 wins  42...Rd2 43.Ke1 Rcc2 44.d7 Rxh2 45.Kd1 Ra2 and wins ) 38...Rxc4 My opponent's turn for a nervous move! The man of steel would have opted to make use of the f-file, which can now be opened, irrespective of the cost on his queenside. ( By 38...fxe6 39.Qxb6 Rf7! ( not 39...Rxc4 40.Rxc4 Rxc4 41.Qxa5 Rxe4 42.Qc7+ Kh6 -forced-  43.Qc1+ Kg6 44.Qc2 d5 45.b6 with the better game ) 40.Qxa5 Rf3 41.Qe1 better than (41.Re3!? Rxc4!! 42.Rce2 (42.Rxc4? Qb2+ ) 42...Rc1 43.Rxf3 gxf3+ 44.Kxf3 Qf6+! 45.Ke3 Rc3+ 46.Kd2 Qd4+ 47.Ke1 Rc1# ) 41...h4 with a strong attack for Black, the threat is ...hxg4 followed by Qh5 so  42.gxh4 Rcf8 43.a5 ( better than 43.Rf2 d5 ) 43...Rh3 44.Kh1! and perhaps White can hold out after  44...Rhf3 45.Kg2 etc. ) 39.Rxc4 Rxc4 40.exf7! Things are now looking much rosier for White since he threatens 41 Rf2 winning.   40...Rc7 Coming back to the f-file, but it is now too late. ( Black can hardly keep in the game with 40...Kxf7 as White will play  41.Qh6 when the e-pawn is immune and he threatens Rf2+  41...d5!? ( Black's other choice is 41...Kg8 42.Qg6+ Kh8 43.h3! Rxa4 44.hxg4 hxg4 45.Qxg4 intending Qg6, Kh2 and Rf2 ) 42.Rf2+ Ke7! 43.Qf8+ Ke6 44.Qe8+ Kd6 45.Qb8+ Ke6 (45...Rc7 46.Rf6+! ) 46.Qxb6+ and White will probably win ) 41.f8=Q+! An important zwischenzug, bringing the black king to a less favourable position.  41...Kxf8 42.Qxb6 Rf7 43.Qxa5 Qa1 No better were (43...h4? 44.Qd8+ and 45. Qxh4 ) ( or 43...Qf6 44.Qe1 with an easy defence ) 44.Qd8+ And Black resigned. A well played resignation! ( After  44.Qd8+ Kg7 45.Qg5+ Kf8 46.Rf2 Rxf2+ (best)  47.Kxf2

Black will neither recoup his two pawns nor find perpetual check. I worked out these variations:  47...--  ( 1)  47...Qxa4 48.Qf6+ winning either the d-pawn or the h-pawn with check ) ( 2)  47...Qd4+ this would have worked if the white queen was still on a5  48.Qe3! Qxa4 49.b6 Qb5 50.h3! either weakening Black's g-pawn or making an escape route for the white king  50...gxh3 51.Kg1! Qb1+ 52.Kh2 and wins ) ( 3)  47...Qb2+ 48.Ke1 Qb4+ (48...Qb1+ 49.Ke2! Qxe4+ 50.Qe3 Qc2+ 51.Qd2 Qe4+ 52.Kf2 and, with his advanced pawn, White wins the queen ending ) 49.Qd2! Qxe4+ 50.Kf2 and  50...Qxa4? is impossible  51.Qf4+! and White wins the king and pawn ending ) ) 1-0