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Rafael Vaganian vs Viktor Korchnoi
Alekhine Memorial (1975), Moscow URS, rd 10, Oct-25
English Opening: Anglo-Indian Defense. Nimzo-English Opening (A17)  ·  1-0



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-09-04  crafty: 39...♖gc8 40. ♘e2 ♖xe2 41. ♕xd1 ♖ec2 42. ♕d5 ♖2c5 43. ♕d2   (eval 0.80; depth 15 ply; 500M nodes)
Dec-09-04  maheshml: Ng6 is really excellant.why 96..Qxa7 is mandatory
Dec-09-04  Nickisimo: My idea was 35. Qf7 Rg8 36. Ng6+, but the rook on c5 and Black's pawns stop the queen from giving any immediate check on the h-file.
Premium Chessgames Member
  beenthere240: <marco65> your line ending in 42.Kf1 is like a problem: 43 Rf4 is looming and anyway black tries to block it gives up a piece or creates another mate.
Dec-09-04  admiralnemo: yep, i was missing 38..Rg4, oops
Dec-09-04  Cyphelium: <admiralnemo> If 35. Ng6+ hxg6 36. Qf7 Nxd1??, then 37. Qxg7 mate wins at once. Black can play 36.- Rg8 instead, when it's hard to see how white should continue.
Dec-09-04  admiralnemo: cyphelium, yep also i forgot that after qf7 the g6 pawn that took the knight is blocking qh5+
Dec-09-04  admiralnemo: i ended up deleting my line and now everyone willl be thoroughly confused by our discussion :)
Dec-09-04  admiralnemo: then there is the further complication that the rook would just take the queen if it eventually made it to h5 anyway. Why must our opponents have pieces!
Premium Chessgames Member
  patzer2: <ice lemon tea><marco 65> After 35.♖xg7 ♔xg7 36.♖d7+ ♔h6 37.♕f7 ♘e2+ 38.♘xe2 ♖g8 39. ♕xh7+ ♔g5, White has at least nine different 40th move options leading to mate (including 40. h4+, which you both selected).

Another alternative line, which I also like here, is the seven-move mate with 40. ♕h4+.

Play could continue 40. ♕h4+ ♔g6 [40...Kf5 41. Nd4+ Kg6 (41...Ke5 42. Qf4#) 42. Qh7+ Kg5 43. f4+ Kg4 44. Qh4#]41. ♘f4+ ♔f5 42. ♕h7+ ♔g4 43. ♕h3+ ♔f3 44. g4+ ♔e4 45. ♖e7+ ♖e5 46. ♕g2#.

Dec-09-04  Marco65: <patzer2> At first I discarded 40.Qh4+ because I didn't see how to continue after 40...Kg6 41.Nf4+ Kf5 42.Qh7+ Ke5, maybe White will be contented by 43.Qe7+ Kf5 44.Qe6+ Kg5 45.h4+ Kh6 46.Qxf6+ Rg6 47.Rxh7+ Kxh7 48.Qxg6+ Kh8 or did you see anything better?
Dec-09-04  williscreek: I thought 35. Ne6 looked good, but Rg7 sure looks stronger.
Dec-09-04  maxundmoritz: I would like to learn more about the line that <who> suggested originally: "35.Rxg7 Nd5 36.Rd7 Nxf4 37.exf4 Qe4 38.Qxb6 is black's best".

I also think that 35..Nd5 is a better choice than 35..Kxg7. Any thoughts on this?

Premium Chessgames Member
  beenthere240: <maxundmoritz> It probably lose more slowly, but as a practical matter, with 35...Kxg7, you can hope that white's calculations are wrong and you'll end up a rook ahead. With 35. Nd5, you're giving up at least a couple of pawns for the dubious pleasure of prolonged torture.
Premium Chessgames Member
  kevin86: To the Victor belongs the spoils-not exactly! Victor had the win,but he spoiled it with a blunder!
Premium Chessgames Member
  Honza Cervenka: 35.Rxg7 Kxg7 36.Rd7+ Kh6 37.Rxh7+ is sufficient too and it is really great fun. Continuation 37...Kg5 38.Rh5+ (38.h3 wins too.) 38...Kg4 39.h3+ Kf3 40.Rxc5 bxc5 41.Qxc3 leaves no room for doubts. If 41...Qe4, then 42.Qc1! (threatening 42.Qd1#) 42...Qxa4 (42...Rd8 43.Qf1 threatening 44.Qg2#) 43.Qf1! Ke4 44.Qd3+ Kf3 45.e4#. If 41...Qc6, then 42.Qd3! threatening 43.e4#. If the Queen leaves the diagonal, for example playing 41...Qc8, then 42.e4+ Kxe4 43.Qd3+ Ke5 44.Qd5#. 41...Rc8 leads to a mate after 42.e4+ Kxe4 43.Qe3+ Kf5 44.Qe6+ Kg5 45.Qg4+ Kh6 46.Qg6#. 41...Rg8 is not better: 42.e4+ Kxe4 43.f3+ Kf5 44.Qxc5+ Qd5 45.Qxd5#. And finally if 41...c4, then 42.Qxc4 Rc8 [42...Rd8 43.Nd3! (threatening Qg4# or Ne1#) 43...Ke2 44.Qc2+ Kf3 45.Ne1#] 43.Qe2+ Ke4 44.Qd3+ Ke5 45.Qd4+ Kf5 46.g4+ Kg5 47.h4+ Kxg4 (47...Kxh4 48.Qxf6+ Kxg4 49.Qg6+ Kf3 50.Qg2#) 48.Qd7+ Kf3! (48...Kxh4 49.Qh7+ and 50.Qh5#; 48...f5 49.Qg7+ Kxh4 50.Qg3#) 49.Qd1+ Ke4 50.f3+ Ke5 (50...Kxe3 51.Ng2# is a beautiful mate!) 51.Qd4+ Kf5 52.Qd7+ Ke5 53.Nd3# (53.Ng6# or 53.Qe6#) finishing this great hunt of black King.
Dec-09-04  Rank Amateur: I still like Mendel's line:
35.Rxg7 Nxd1 36.Qf7 Qe4
Black's up a rook, has postponed checkmate, and has threats of his own. (and I don't how you guys refer to each other with those color-coded tags)
Premium Chessgames Member
  Honza Cervenka: <Rank Amateur> 35.Rxg7 Nxd1 is refuted by 36.Rxh7+ Kxh7 37.Qf7+ Kh8 38.Ng6# or 37...Kh6 38.Qg6#.
Dec-09-04  maxundmoritz: <Rank Amateur> Kibitzing Tricks is what you are looking for. Maybe can put a link to the page into the "Leave a comment!" section below? I also came across it just by chance.
Premium Chessgames Member
  patzer2: <Marco65><patzer2><...I discarded 40.Qh4+ because I didn't see how to continue after 40...Kg6 41.Nf4+ Kf5 42.Qh7+ Ke5> Let's try 40...♔g6 41. ♘f4+ ♔f5 <42. ♕h3+!> [42. Qh7+ wins, but this line is also fun] 42...Rg4 [42...Ke4 43. Rd4+ Ke5 44. Qd6#; 42...Ke5 Qd6#; 42...Kg5 43. Qh5#] 43. Qh7+ Rg6 [43...Ke5 44. Re7+ Kd6 45. Re6#; 43...Kg5 44. Qh5#] 44. ♕xg6+ ♔e5 45. ♖e7+ ♔d6 46. ♕xf6#
Premium Chessgames Member
  patzer2: <Marco65> I think I overly complicated the answer to your question. After <40...Kg6 41.Nf4+ Kf5 42.Qh7+ Ke5>, White mates in two with the pretty 43. Re7+! Kd6 44. Re6#
Dec-09-04  apple head: <Although White wins later after a blunder by Korchnoi (39...Nxf2? instead of 39...Rgc8!) there was a neat win with 35.Rxg7!! which gives White a decisive attack. E.g., 35...Kxg7 36.Rd7+ Kh6 37.Qf7 Ne2+ 38.Nxe2 winning.> No its Rg7 Kg7 Re7+ Kh6 Rxh7+!! (Kh7 Qf5 Q/N g6# is next. ) Kg5 Rh5#
Premium Chessgames Member
  Honza Cervenka: <apple head> 35.Rxg7 Kxg7 36.Rd7+ Kh6 37.Rxh7+ Kg5 38.Rh5+ is not checkmate as black can play 38...Kg4. For a possible continuation see my comment above.
Premium Chessgames Member
  patzer2: <Honza Cervenka>'s enjoyed your line 35.Rxg7 Kxg7 36.Rd7+ Kh6 37.Rxh7+ . In addition to being fun, this line is a great advanced lesson in the "pursuit" or king hunt tactic, containing a number of practical and useful mating patterns. I was surprised when my computer program initially gave this line only as equal, finding the winning pattern only after running for an extended time.
Dec-10-04  Marco65: <patzer2> Great mate in two! These analyses of you and Honza Cervenka are really challenging for me to follow without moving pieces on a board.

My habit is to give up a line and try to find another one when I can't find a winning continuation in a reasonable time, that's how I came to 40.h4+. On the contrary you never give up.

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