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Yuri Nikolaevich Sakharov vs Alexander Cherepkov
USSR Championship (1968/69), Alma-Ata (Almaty) URS, rd 2, Jan-01
English Opening: Anglo-Indian Defense. Hedgehog System (A17)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Mar-24-04  masterwojtek: I like this one, not a common formation.
Mar-24-04
Premium Chessgames Member
  Benzol: 37...♔g8; 39.♖h8+ ♔xh8; 40.♕h6+ ♔g8; 41.♕xg7#. Very nice but there were some moves I didn't understand in this game.
Mar-24-04  Bloody Tinfoil: Great ending by White. No matter where Black's King goes, it dies. 37. ... Kg6 is followed by 38. Rg4+ Kh7 (Blacks only move as Kh5 leads 38. Qg5 checkmate) 39. Rxg7+ Kh8 40. Qh6# If Black moves 37. ... Kg8 then 38. Rh8+ Kxh8 39. Qh6+ Kg8 (Blacks pawn can't take because of the pin from White's dark squared bishop on a1) 40. Qxg7#

No matter what, Black ends up dead at the end.

Mar-24-04  Bloody Tinfoil: Grrr, took too long to type so now I am third on the Kibitz list, oh well! Yeah alot of moves seemed pointless such as 13. Rc2? Why move it there, there seemed to be no reason to. Maybe 13. e3 would have been better, but that leads to a bad dark squared bishop that would have a hard time to escape. What other moves does White have besides 13. Rc2?
Mar-24-04
Premium Chessgames Member
  patzer2: Instead of 25... Bxa2, I think perhaps Black should have played 25...Bb4!?, winning the exchange after 25...Bb4!? 26. RxBc4 bxc4 27. Qxc4.

Although White has two pawns for the exchange and strong central pressure with his passed pawn, it still seems to me that 25...Bb4!? would have provided Black more counterplay and active counter-chances than 25...Bxa2.

Mar-24-04  Camus: Also to mention, that exchanging rooks first (35. Rxd6)would not have been good, because Black's king could escape then via f8 after Bxh7
Mar-24-04  euripides: The timing is tricky. If 35... Kh8 then 36 Rh4 f6 37 Bg6+ and wins the rook. If 36...Rxc6 then 37 Bg6+ Kg8 38 Rh8+ Kxh8 39 Qh6+ Kg8 40 Qh7 mate. The trick is to exchange rooks only if Black takes the bishop (otherwise you give Black the change of Be5 defending).
Mar-24-04
Premium Chessgames Member
  kevin86: I saw the moves,but I had them out of order and let the cat out of the bag. It was SO important to hold off the rook exchange-as the king escapes.

This lesson shows how important move order is--can we call it chess syntax?!

Mar-24-04  Hinchliffe: Yes we can Kevin.
Mar-24-04
Premium Chessgames Member
  patzer2: Perhaps 29...a3!? 30. Bxa3 Qa8! with a strong double attack would have given Black the advantage. The point being that after 29...a3!? 30. Bxa3 Qa8!, if White now plays 31. Bxe7?? Black has a quick mate after 31...Qa1+ 32. Qc1 Qxc1+ 33. Kg2 Qf1#.

So, after 29...a3!? 30. Bxa3 Qa8!, White is forced to give up the exchange with 31. Rxc4 bxc4 32. Bxe7 [not 32. Bb2? Qa2 or 32. Bc1? Rxd4 ] 32...Rxe7 33. d5 Qa1+ 34. Kg2 Qd4, giving Black a firm grip on the position and a clear advantage.

Of course after 29...a3!?, White can try to spoil Black's fun by playing 30. Bc1, but then it seems to me that Black secures a clear advantage after 30...Rd6!? 31. Rxd6 [if 31. Rxc4, then 31...bxc4 32. e5 Rh6 looks good for Black] 31...Qxd6.

The computer (Fritz 8) slightly prefers the line 29...a3!? 30. Bc1 Qa8!? 31. d5 Qa5!? as best for Black (-1.06 @ 15 depth & 720kN/s), but I wonder if it might be putting the Black Queen a bit too far out of play to defend against a potential White Kingside counter attack.

Mar-24-04  karlzen: Very nice, Réti-inspired play by Kasparov's old trainer! Nice end too of course!

<Bloody Tinfoil>, 13.Rc2! defends the bishop on b2, prepares doubling on the c-file and gives the white queen access to a1 and the long diagonal. This is typical for the play of the system founded by Richard Réti, one of the hypermodern. (14.Qa1 Rc8 15.Rfc1 c4 16.Ne5 or something like that - was an alternative to the game).

14...c4!? is a violent attempt to unbalance the position when White has a comfortable positional edge, playing against the hanging pawns/IQP. c4 in the Tarrasch Defence, is called the Swedish variation, by the way.

17.Rc2 looks better as after 17...Bxa2 18.Nd2 white's centre will start rolling.

21...b4!? is interesting, intending 22.Ra4 a5 23.a3 Bb5 24.axb4 Bxd4! with about an equal endgame in prospect.

<patzer2>, After 25...Bxb4?! black gets the exchange, but to a very high price. White's bishop-pair and central pawns are much more than sufficient compensation. The black rooks have no open files, and are thus quite useless. White will be able to force a weakening of black's kingside, for example g7-g6 when the white dark-squared bishop gets even stronger. If black exchanges bishops, then there will be no-one to stop the d-pawn. Without the queenside pawns (as in the game) black is all activity down for nothing!

35.Rxd6 is actually better than the move played in the game. The reason is that black could resist longer with 36...f5!. Instead 35.Rxd6 Bxd6 36.Bxh7+! Kf8 37.Bxg7+! Kxg7 38.Rg4+ Kf8 39.Rg8+ Ke7 40.Qg5+ Kd7 41.Bf5+ Kc7 42.Rxe8 is quickly winning.

Whenever you find many moves strange, analyse the game exhaustively (perhaps using a computer - but only after thorough analysis on your own), and try to explain move-by-move. You will soon recognise patterns in games and you will understand more and more moves. Then of course you can always ask on this message board. :)

Mar-24-04  karlzen: <patzer2>, you do mean 29...a3!? 30. Ba1, right?

Anyway, 29...a3! seems to be black's best try. He gets his passed pawn rolling and disturbs white as much as possible. Perhaps black was optimistic enough to think he would be able to play a3 later after improving his position slightly.

Mar-24-04  syamanta saikia: <Benzol> in ur analysis what's wrong with 39. Bxg7 Kxg7 40. Qg5+
Mar-24-04  Bloody Tinfoil: karlzen thanks for the feedback! Rc2 seems to be good for other things, but it just dosn't look to be good there because white never had to worry about the bishop being attacked and he never doubled up on the c file. It would be good if the game didn't go as it went.
Mar-24-04  Checkmate123: Is Bxg7 playable?
Mar-24-04  PAWNTOEFOUR: i think most of us just looking at this knew bxh7 would play a crucial part in this...but i was lookin at rxr,first and then capturing the pawn...nice puzzle
Mar-24-04
Premium Chessgames Member
  patzer2: Thanks for the comments on my two suggestions.

After 25...Bxb4?! and the win of the exchange, I must admit that White has the advantage and that Black would have to play careful defense to try and obtain drawing chances against White's two bishops and strong pawn center. The initiative is definitely with White. I had initially thought 25...Bxa2 contributed to Black's defeat, and that this would be an improvement. However, you have convinced me otherwise. Can't blame this one on the computer either, as I found the move myself. Fritz 8 also preferred 25...Bxa2 -- even though its initial (and perhaps overly optimistic) assessment of 25...Bxb4?! (checked it only after I recommended it) was that the move was good for equality.

I did intend to record 29...a3! 30. Ba1 (not 30. Bc1) as leading to a Black advantage after my recommendation of 31...Rd6!? 32. Rxd6 Qxd6 or Fritz 8's recommendation of 31...Qa8!? 32. d5 Qa5!?

I definitely agree that 29...a3! is Black's best try as an improvement over 29...Qb7?!

Mar-24-04
Premium Chessgames Member
  Benzol: <syamanta saikia> <in yr analysis what's wrong with 39.Bxg7 Kxg7 40.Qg5+>

Nothing except that Black isn't forced to take the Bishop. He could prolong the game with 39...f6 for example. In my line the moves are forced.

Mar-25-04  syamanta saikia: <Benzol> Thanx!
Mar-25-04  karlzen: <Checkmate123>, I believe you mean the immediate 35.Bxg7!?, right? I think it's interesting, white may be winning, but it's a lot harder I'm sure. 35.Bxg7 Qxc6!! (an amazing move I'm almost certain you didn't expect! Acutally it's the only move. 35...Rxc6? is bad in view of 36.dxc6 Qxc6 37.Bxf8 Kxf8 38.Qxa3+ Re7 39.Bxh7) 36.dxc6 Bxg7 37.Qxa3 Rd1+ 38.Kg2 Bf1+ 39.Kf3 Rd3+ 40.Qxd3 Bxd3 41.Bd7 Ra8 and black is no worse, he might actually be better here.

36.Bf6! instead is considerable (with obvious mating threats). 36...Rxf6 37.dxc6 Rxc6 38.Bd7 Ree6 39.Bxe6 Rxe6 and white has queen for the bishop-pair only! However, the a-pawn makes one wonder, can black hold the position and gain a draw? I think he can and that proves the power of the two bishops!

Mar-25-04  karlzen: <patzer2>, fortunately the computers don't (yet) fully understand the power of exchange-sacrifices!

<Bloody Tinfoil>, it's true that Rc2 seems useless when the game went as it went. However, I doubt the correctness of c5-c4, or at least that white is not better after it and after another move than c4, white could've made use of Rc2 and its ideas.

Apr-28-06  McCool: I believe this game was played in 1969 not 1968 but nice combination nonetheless.
Feb-18-13
Premium Chessgames Member
  FSR: Bishop Sakh.
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