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Yuri Balashov vs Peter Biyiasas
Manila Interzonal (1976), Manila PHI, rd 1, Jun-13
Spanish Game: Morphy Defense. Modern Steinitz Defense (C75)  ·  1-0


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sac: 16.Rxd7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Oct-12-05  logo: Difficult...
Oct-12-05  pinakin8: The best that I could come up with was Ra1xB after few minutes of thinking; so to test it, I setup the position in Fritz...It took about 3 nanoseconds to comeup with the best line. IMO we've created a MONSTER.
Oct-12-05  Fezzik: I found Rxd7! intending Qg4! almost instantly but thought I was missing some sort of forced mate and looked for about five minutes longer than I needed to.

Still, this is a nice combination that creates an unusual balance of forces. White maintains a strong initiative, but the combination may have been difficult for some people to find.

Oct-12-05  molle2006: Argh... I tried something like Bxf7+ in order to fork the queen.
Oct-12-05  rishi: I got is devastated on the king side...powerful bishop a knight and a queen against literally nothing to support the poor king..
Oct-12-05  misantrooppi: sfm, I was wondering the same 16. ..♕g5 , I would have played h4 first, and then g3 but I guess it doesn't make any difference. Still I wonder why black did not go for this ? The game continuation seems worse.
Oct-12-05  SamuelS: <misantrooppi>, look at my previous analysis: 16...Qg5 17. h4 Qf4 18. Qh5! and White is winning by threatening g3 and Qg6. I think the game continuation is the best Black can do after all.
Oct-12-05  misantrooppi: <SamuelS> oh, didn't see that. Thanks for pointing it out.
Oct-12-05  DanRoss53: I got 16. ♖xd7! ♕xd7 17. ♕g4 ♕xf5 18. exf5 -- I think that's close enough to consider the puzzle "solved".
Oct-12-05  DanRoss53: After 16. ♖xd7 ♕g5 17. h4 ♕f4 18. ♕h5 (as noted by <DWINS> and <SamuelS>), White has a won game. Crafty suggests: 18. ... ♔h8 19. ♗xf7 ♘b8 20. ♕g6 ♕xf5 21. ♕xf5 ♗xb2 22. ♖ad1 ♘xd7 23. ♖xd7 ♖ad8 24. ♖xc7 ♖d1+ 25. ♔h2 ♖d2 26. ♖xb7 ♗xc3 at a depth of 13 giving White a 6.54 point advantage.
Oct-12-05  child of my tears: I looked at 16.Qg3 first but Bg5 refutes the attack so I looked for a way to gain a tempo in moving the queen...Rxd7 was obvious from there. My chess has come on so much in the past two weeks, watching the WCC and listening to Yasser Seirawann and Andrew Martin's commentary. Anybody else been doing this?
Oct-12-05  EmperorAtahualpa: Wow, quite a difficult puzzle for Wednesdays! I didn't get it. Great combination though!
Oct-12-05  dakgootje: Im afraid i cant say i did solve it...I did consider it but didnt see much benefit of it so I looked instead of that for things like 16.♗xf7 ♔xf7 17. ♘xh6 but it all wasnt forced and strong enough
Oct-12-05  chessboyhaha: No problems to see this sacriface. On art of attack in chess V. Vukovic explains that this kind of sacriface exists a lot, more than a open-center sacriface.It's important to show that the opening that Black was playing was bad. White forced the Black to stay back, defending what they could. Obviously, something fall!!
Premium Chessgames Member
  YouRang: I join those who missed it. I guessed that it might be a 'spoiler' puzzle where we are tempted to go after some risky move like 16. Qg4 -- only to be met by ... Qg5. I looked at the rook sac, but didn't follow it far enough.
Oct-12-05  TopaLove: This puzzle reminds of a Fischer´s puzzle we had someday. He attacked a rook and threatened mate right in the opening. **I´m sad that poor people are restricted not to watch the live broadcast. Anyway, poor people are always restricted to bad things.
Oct-12-05  notyetagm: <Kasparov has said that it is worth sacrificing a pawn to get a knight firmly entrenched on the f5-square.> It is because of nasty combinations like this one (16 ♖xd7! ♕xd7 17 ♕g4) that Black ususally plays ... g6 in the Ruy Lopez to keep a White knight out of f5 in the first place.
Oct-12-05  notyetagm: I would have missed this problem solution too but I know the tactical motif (pattern) of <White having a knight on f5 and playing ♕g4 to win the undefended Black d7-queen> due to the double threat of ♕xg7# and ♘h6+/♕x♕. Here the decoy 16 ♖xd7! sets up the necessary piece arrangement.

This tactical pattern is covered on pages 56-57 of Murray Chandler's excellent book How To Beat Your Dad At Chess, in a section entitled "A Knight on f5 (1)". In fact, diagram 93 on page 57 shows this exact tactical sequence of ♖xd7 ♕xd7 ♕g4.

Oct-12-05  notyetagm: For another great example of this theme, check out Keres vs Gligoric, 1959 and Keres' beautiful petite combination 27 ♖xg7+! ♗xg7 28 ♕g4 ♕xf5 29 ♕xf5, winning ♕+♙ for ♖+♘.
Oct-12-05  trumbull0042: I thought this was a spoiler and went for 16. Raxc1.
Oct-12-05  agentniner: Weren't there other moves for black besides 17 ...Qxf5?
Premium Chessgames Member
  kevin86: Brilliant intermezzo by white! I saw it coming,but I missed the trigger move:Rxd7!

I knew the the bishop's recapture was too obvious of a move;in fact,black keeps his bishop until the bitter end,but loses the game.

Premium Chessgames Member
  Sneaky: I didn't even come close to solving this one. Once I saw the answer I thought that it must be a mistake, then it started to dawn on me that the queen is lost in all variations. It's such a simple motif but you don't see it a lot, and so, it's easy to overlook.

This puzzles this week have been unusually hard. Even yesterday's (which some people said should have been a Monday puzzle) had some wrinkles that had to be straightened out before you could sacrifice with confidence.

Oct-12-05  agentniner: Why doesn't 17... Bg5 work?
Oct-12-05  John Abraham: 17...Bg5 18.Nxh6
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