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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  John Abraham: 17...Bg5 18.Nxh6
Premium Chessgames Member
  FSR: 16.Rxd7! Qxd7 17.Qg4 and Black stands up. Took me two seconds.
Premium Chessgames Member
  Gregor Samsa Mendel: I got it, but it took me more than two seconds. White set a diabolical trap with 15 Nf5 that I would have fallen for completely.
Mar-03-21  Granny O Doul: Your Biyiasas is showing.
Mar-03-21  Refused: 16.Rxd7 Qxd7 17.Qg4 curtains black has to deal with the dual threat of 18.Qxg7# and 18.Nxh6+ (19.Qxd7) which is simply too much.
Mar-03-21  Walter Glattke: 16.Rxd7 Qxd7 17.Qg4 A) 17.-Rad8 (-Qe8) 18.Qxg7# B) 17.-Bg5 18.Nxh6+ Bxh6 19.Qxd7 Rac8 wins Q+P for R+N C) 16.Raxc1 Kh7 17.Qh5 Bxf5 18.Rxd8 Raxd8 19.exf5 g6 20.fxg6 fxg6 21.Qe2 D) 16.Raxc1 Qe8 17. Rxd7 transposes to B): 17.-Qxd7 18. Qg4 g5 19.Nxh6+ Kh7 20.Qxd7 Kxh6 21.Bxf7 Q,B+2P for R +N
Mar-03-21  Cheapo by the Dozen: And the game ends on a similar kind of tactic, again combining a mate threat and a discovered attack.
Mar-03-21  saturn2: Definitely more than 2 seconds. There is also

16. Rxd7 Qg5 with possibly

17. h4 Qf4 18. Qxf4 Bxf4 19. Rxc7

Mar-03-21  Brenin: A short process pf elimination yielded the zwischenzug 16 Rxd7, bringing the Q onto an undefended square so that 17 Qg4 threatens both mate and the Q. A ghost of this theme recurs later, with the P on f5 replacing the N and the Black R replacing the Q on d7. Very elegant.
Mar-03-21  mel gibson: I saw that but it took me over 20 seconds.

Stockfish 13 says

16. Rxd7

(16. Rxd7 (♖d1xd7 ♕d8xd7 ♕f3-g4 ♕d7xf5
e4xf5 ♗c1-g5 g2-g3 ♖a8-d8 ♕g4-e4 ♗g5-f6 h2-h4 ♖d8-d2 ♖a1-d1 ♖f8-d8 ♖d1xd2 ♖d8xd2 ♕e4-c4 ♖d2-d7 ♗b3-a4 ♖d7-d6 ♕c4-e4 ♘c6-d8 ♕e4-e3 ♘d8-c6 ♗a4-c2 ♔g8-f8 ♗c2-e4 ♔f8-e8 ♕e3-c5 h6-h5 ♔g1-g2 ♗f6xh4 g3xh4 ♔e8-d7 ♗e4xc6+ ♖d6xc6 ♕c5xe5 ♖c6-d6 ♕e5xg7) +4.39/39 85)

score for White +4.39 depth 39

Premium Chessgames Member
  agb2002: White is one bishop down.

Black threatens Bg5.

The knight on f5 invites to play 16.Rxd7:

A) 16... Qxd7 17.Qg4

A.1) 17... f(g)6 18.Nxh6+ Bxh6 19.Qxd7 + - [Q+P vs r+n].

A.2) 17... Bg5 18.Nxh6+ as in A.1.

A.3) 17... Qxf5 18.Qxf5 Bg5 19.Rd1 + - [Q vs r+n].

B) 16... Qf6 17.Rxc1 wins a piece.

C) 16... Qg5 17.h4 Qf4 18.Qh5, with the quadruple threat, Qg6, Rxf7, Bxf7+ and g3 looks winning.

Mar-03-21  saturn2: I think after .16 Rxd7 Qg5 white can trap the Bc1 by 17. Qe2 followed by Rd1. One has to see that.
Premium Chessgames Member
  agb2002: I meant 18.exf5 in my line A.3: 18... Bg5 (18... Bxb2 19.f6 g5 20.Qh5 wins) 19.Rxd1.
Premium Chessgames Member
  agb2002: 19.Rd1. #&%! text @?!# editor...
Premium Chessgames Member
  steinitzfan: I actually got this one. I could see the tactical idea that picks up the queen but it looks like almost queen-level material loss has be accepted to do so. Evaluating the position after the combination is the hard part.
Mar-03-21  malt: 16.R:d7 Q:d7 17.Qg4 with a double threat.
Mar-03-21  awfulhangover: The position is screaming 16.Rxd7 Qxd7 17. Qg4. Yes!
Premium Chessgames Member
  chrisowen: Troubled it ok Rxd7 goodness abridge fluffs crazy it aha venture rambled it ok foodbag troubled it ok lit ovid gordon tabacs victor kilnum winkum whammy quaffer epicure juvenile its padfoot hitz nimble revile juniors within beck and call totadd garcons hoofed it ok goofball Bxc1 lit ovid it is codely Rxd7 etc.
Premium Chessgames Member
  chrisowen: Mardi gras put in drum g4 and alf way there?
Mar-03-21  Granny O Doul: Or: Biyiasas cut.
Premium Chessgames Member
  chrisowen: No more little ones more bangers corp hang out to dry x
Mar-03-21  TheaN: Got <16.Rxd7 Qxd7 17.Qg4>, but now I'm wondering if <17....Qxf5> else Qxg7# or Nxh6+ <18.exf5 +-> is crucial, given 18....Bxb2? 19.f6 g5 20.Qh5 +-.

Don't get me wrong, I would have played this, but ending it after Qg4 might be too soon. The point is that after 18.Qxf5? Bxb2 19.Rd1 Bxc3 Black picks up a <lot> of material for the loss and has a monster outpost on d4. SF gives this +1.3 in short analysis, so this might be very tricky to win.

Premium Chessgames Member
  Once: There is a pleasing symmetry here. After 17. Qg4 White sets up a pattern of a loose black piece on d7, a trigger white piece on f5 and the white queen on g4. White threaten to move the trigger piece on f5 to win d7 or do something painful on g7.

In the final position, White has a similar pattern. There is a loose black piece on d7, a trigger white piece on f5 and the white queen on g4. And again White threatens to win d7 or do something painful on g7.

Very kind of black to conspire to make the same pattern twice!

Premium Chessgames Member
  gawain: I didn't solve this one. I will remember it, though. White lures Black's queen to an unprotected square. Then White makes a harmless-looking move 17 Qg4 (threatening mate on the move, but easily defended) and Whoa! we see that Black cannot block the mate with ...g6 or ...g5 after all, on pain of losing the queen. Stunning!

<Once> You make a very nice observation about the second occurrence of the same pattern.

Premium Chessgames Member
  Breunor: Easier than most Wednesday puzzles, I found this one quickly. Puzzles are funny, when you see it the answer looks easy.
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