Polovnikova,E - Babayeva,S
B17 Caro-Kann Main Line 4...Nd7
Notes by Tim McGrew

White was a schoolgirl at the time that this game was played, but just two years later her rating had shot up to well over 2300.

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+

This is an old and simple system against 4...Nd7. Karpov scored well with it back in the 70s.

6...Nxf6 7.Ne5 e6 8.Bg5 Be7 9.c3 0-0 10.Bd3 Nd5 11.Bxe7 Qxe7 12.Qf3 c5 13.Qe4?!

White actually gets into a bit of trouble with this move. 13.0-0 cxd4 14.Qe4 Nf6 15.Qxd4+/= ; 13.dxc5 Qxc5 14.0-0+/=.

13...f5 14.Qe2 cxd4 15.Bc4

15.cxd4 would be met by 15...Qb4+ when White cannot save the pawn at d4.

15...dxc3 16.Bxd5 exd5 17.bxc3 f4 18.0-0 f3 19.Qe3 fxg2 20.Rfd1 Be6 21.Rd4

Black stands much better here. How does it happen, then, that White wins the game? The answer lies not only in Black's errors over the next twenty moves but also in White's superior piece activity.

21...Rf5 22.Nd3 Qf6 23.Re1 Bf7 24.Qg3 Rf3 25.Qc7 Qc6?!

25...b6 is better.

26.Re7 Rc8?

But this is a serious error, letting White fully back into the game.

27.Qxc6 bxc6 28.Kxg2

So Black loses the a-pawn as well, and White can start to think about more than merely drawing.

28...Rf6 29.Rxa7 Bg6 30.Nc5 Rcf8 31.Rd2

Of course White is not going to let Black capture on f2.

31...Rf4 32.Ne6 Rg4+ 33.Kf1 Rb8 34.f3 Rc4 35.Rxg7+ Kh8 36.Rc7 Rxc3 37.Kf2 Bh5 38.Ng5 Bg6 39.Re2 c5 40.Ree7 Rc2+ 41.Kg3 c4 42.h4

42.Nxh7! Bxh7 43.Rxh7+ Kg8 44.a4 would give White serious winning chances because the Rooks are so strong.

42...Rc1 43.Nxh7

White chooses this moment to "cash in" on her piece activity.

43...Bxh7 44.Rxh7+ Kg8 45.Rhd7

With both Rooks behind Black's pawns, Black is very likely to pick up one of them.

45...c3

Black stakes everything on the advanced c-pawn.

46.Rxd5 c2

Now if it were Black's move, 47...Rg1+ followed by 48...c1=Q would win a Rook and leave Black with a winning position. But it is White's move.

47.Rdc5!

White correctly lines up both Rooks on the c-pawn, a formation that meets the threat mentioned in the previous note.

47...Rb2

This is the only move that keeps the c-pawn.

48.a3 Ra2 49.Kf4

Instead 49.Ra5 Rg1+ 50.Kh3! (50.Kf2?? c1Q+ 51.Rc2 Rxc2# ) 50...Rh1+ 51.Kg4 Rg1+ 52.Kh5 Rg7 (52...c1Q?? 53.Ra8# ) 53.Rg5 Rxg5+ 54.hxg5! Rxa3 55.f4 and White should win, for example, 55...Rf3 56.Kg4! Rf2 57.g6 Kf8 58.Kg5 and with f5 and Kf6 White will threaten mate.

49...Rxa3 50.Rxc2 Ra4+

50...Rxc2 51.Rxc2 Kg7 is drawn, but the draw can be fairly tricky for Black to hold.

51.Kg5

51.Kg3 Rxc2 52.Rxc2 Kg7 is still a draw.

51...Rg1+

51...Rxc2 52.Rxc2 is a draw, but only if Black finds the right move here: 52...Ra5+ 53.Kg4 Kg7=.

52.Kf5 Rxh4 53.Rc8+ Kh7 54.R2c7+ Rg7 55.f4 Rh5+ 56.Kf6 Rh6+ 57.Ke5 Rh5+?!

This needless check draws the pawn forward and takes the Rook off of the vital third rank. 57...Rxc7! 58.Rxc7+ Kg8 Black has a Philidor barrier in place and draws comfortably.

58.f5 Rxc7 59.Rxc7+ Kg8??

This move looks very natural, bringing the King back around to the front of the pawn. But actually, Black's Rook is on a horrible square, and that fact permits White to win. 59...Kh6! is the only move that keeps the position drawn. But why? The point is that White cannot simply plow forward with the pawn: 60.Ke6 Rh1 61.f6 Ra1 62.Ke7 Ra8!= and Black has reached a theoretically drawn position.

60.Ke6! Rh1 61.Rc8+ Kh7 62.Kf7?

Black should be able to hold this ending by giving checks on the "long" side of the pawn. Better was 62.f6! Re1+ 63.Kf7 Ra1 64.Ke8 Re1+ 65.Kf8 Ra1 66.f7 Re1 67.Re8 Ra1 68.Ke7 Ra7+ 69.Ke6 Ra6+ 70.Kd5+- and Black soon runs out of checks, at which point White queens the pawn.

62...Rd1?
Black clearly has no idea how to handle this endgame. Now it is actually lost. Still drawing was 62...Ra1! 63.Re8 Ra7+ 64.Re7 (64.Kf8 Ra6 65.Re7+ Kh8! 66.Re6 Ra8+ 67.Re8 Ra6 68.Kf7+ Kh7= ) 64...Ra8= This is a drawing technique worth remembering.

63.f6! Rf1 64.Rc2

Threatening mate, so Black must walk backwards with her King or else make the Rook passive.

64...Rh1 65.Re2

65.Rf2 is simpler: 65...Rh3 66.Kf8 Rh1 67.f7 Rh3 68.Ke7 Re3+ 69.Kf6+- etc.

65...Rh6 66.Ke7 Kh8 67.f7 Rh7 68.Ke8

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