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Emir Dizdarevic vs Vladimir Kramnik
Manila Olympiad (1992), Manila PHI, rd 12, Jun-21
Zukertort Opening: Queen Pawn Defense (A06)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Given 5 times; par: 66 [what's this?]

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sac: 40...Rxf2+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Mar-20-18  stacase: A two stepper
Mar-20-18
Premium Chessgames Member
  Phony Benoni: Looks like 40. .Rxf2+ is the move here. 41.Kxf2 Rd2+ 42.Kg1 (42.Kf1 Qe2+ 43.Kg1 Qg2#) 42...Qe1+ 43.Rf1 Qxg3+ 44.Qg2 Qxg2#.

Declining by 41.Kh1 Rd1# is no good, so that leaves 41.Kg1. Oh, wait, just 41...Rd1+ forces 42.Kxf2, and we're back to the first line.

Mar-20-18  stst: Tuesdy R-sac, the real killer is actually Qb1#: 40........RxP+
41.KxR (what else...either Kh3 gives up the R, or K to back rank got Q#) Rd2+ 42.Kf1 (Kg1 invites Qe1#) Qb1#, as promised.
Mar-20-18
Premium Chessgames Member
  wtpy: After 41.. Rd2+ 42 Kg1 Qb1+ is not mate and in fact loses because white can interpose his rook on f1. 42...Qe1+ 43 Rf1 Qg3+ with mate next is the way to go.
Mar-20-18
Premium Chessgames Member
  Gregor Samsa Mendel: The prosaic 41..Qxb4 seemed too obvious to be puzzle material, but it would also be good enough to win.
Mar-20-18  saturn2: The knight on b4 is for free but 41..Rxf2 decides quicker.
Mar-20-18  ChessHigherCat: I found the solution with Rxf2 and then looked up at the players' names and thought, oh no, I found the win for Crumbnik!
Mar-20-18
Premium Chessgames Member
  agb2002: Black has a rook for a knight.

White threatens Qxe4 and Qxb5.

The white king is the only defender of the f-pawn. This suggests 40... Rxf2+:

A) 41.Kxf2 Rd2+ 42.Kg1 (42.Kf1 Qa1#) 42... Qe1+ 43.Rf1 Qxg3+ and mate next.

B) 41.Kg(h)1 Qe1#.

C) 41.Kh3 Qh7+ (quicker than Qxf3) 42.Kg4 f5+ 43.Kf4 (43.Kg5 Qg6#; 43.Rxf5 Qxf5#) 43... Qh6+ 44.Ke5 Re2+ and mate in two.

Mar-20-18  radtop: <agb002> How about 41.Kh3 Qh7+ 42.Kg4 Rd4+ 43.Rf4 Qf5+ 44.Kh4 Rh2# If 43.Kg5 f6+ 44.Rf6 gf6#
Mar-20-18  Calar: This reminds me of an old advice by some chess master (Hugo Faehndrich , IIRC): "If you must choose between taking the queen and checkmate, always take the queen; because checkmate - doesn't have to be a checkmate".

In practical game, I'd play prosaic Qxb4 any day without a second thought, simply because it 's a lot less riskier and constitutes a trivial win being a rook up.

Mar-20-18  patzer2: Earlier than today's Tuesday puzzle position (40...?), a critical defensive move by Black is 26...Rxd4! = to ⩲. If 26...gxh6?, then 26. Bxh6 Bf4 27. Qxf4 +- (+2.97 @ 24 ply, Stockfish 9) is winning for White.

White's game starts to go bad with 28. Bc3?, allowing 28...Nxc3 29. Qxc3 Qd8 ∓ (-0.70 @ 22 ply, Stockfish 8). Instead, 28. Nc2 Rxd2 29. Rxe4 Qd8 30. Ne3 = (0.00 @ 26 ply, Stockfish 9) holds it level.

Mar-20-18
Premium Chessgames Member
  malt: Have <40...R:f2+ > 41.Kh3

(41.K:f2 Rd2+ 42.Kg1 Qe1+ 43.Rf1 Q:g3+ 44.Qg2 Q:g2# )

41...Qh7+ 42.Kg4 Rd4+ 43.Rf4
(43.Kg5 Qg6#/Qh7# )
43...f5+ 44.Kg5 Qh6#

Mar-20-18  mike1: I know this game hence no surprise.
But even Qxb4 is completely crushing.
Mar-20-18  morfishine: Not really sure of the point of this position with reference to being a puzzle

<40...Qxb4> leaves White down a rook

<40...Rxf2+> is faster and more flashy

Maybe the point is to see if the solvers can see both options

*****

Mar-20-18  Carlos0012358: <agb2002> here is another option:

D) 41.Kh3 Qh7+ 42.Kg4 Rd4+ 43.Qe4 RxQ 44.Rf3 f5+ 45.Kg5 Qh6#

Mar-20-18  alphee: Puzzles like the last two, give you the idea that you are good, but is it true? Let's wait for friday's one and after to check that.
Mar-20-18  ChessHigherCat: <alphee> Thanks for the voice of discouragement. You could probably say the same of the Sunday puzzles if your criterion of "good" is being a 2400 player. And are they "good" enough to beat a 2500 player? And are they...
Mar-20-18  NBZ: I think it is part of good technique to find and play a move like 40. ... Rxf2+ (as long as you can trust your calculations are right). 40. ... Qxb4 gives White potentially annoying counterplay with his passed c-pawn. It is true that this counterplay amounts to nothing (for example 41. Qb7 Rf8 42. c6? Qe4) and if you see that in advance, 40. ... Qxb4 is a perfectly fine move to play. But in such positions if you always take the knight on b4, without more than a cursory calculation, it comes back to bite you back in the long-run. Every now and then an opponent puts up stiffer resistance than you expected and you make some missteps, and a won game is lost. Whereas checkmate always ends the game!
Mar-20-18  Pchief: Why didn't White exchange his "dim" knight for the Black bishop with 31.Nxb8 ? After all, there wasn't going to be a tactic. e.g. 31...Rd1 32.Qb4 or 31...Re4 32.Qa5
Mar-20-18  NBZ: Dennis Monokroussos made a similar point about Kramnik's loss yesterday to Grischuk. Kramnik could have drawn easily with 31...Bxc3 but he opted not to do so because he was worried about the pin after 32.Bxc3 Rxc3. Whether he could get of the pin or not required some concrete calculation, and it seemed easier for Kramnik just to play on without forcing the position. Monokroussos's point though was that the extra 5-10 minutes of calculation could have saved Kramnik 2+ hours of work in trying to save the game afterwards. I think the same principle of economy applies here: Rxf2+ ends the game straight away if it is correct, Qxb4 doesn't, and therefore it is worth it to take the extra time and effort to calculate it out and see if it works.
Mar-20-18
Premium Chessgames Member
  gawain: Knowing that this is an Easy puzzle leaves little choice. Look for something forcing. Have to try 40...Rxf2+. Fortunately it works.
Mar-20-18  Monocle: Rxf2+ leads to mate, and was the first move I was drawn to before even taking in the full position. But, Black can also just play Qxb4 and be up a whole rook. I kind of feel like a good puzzle shouldn't have such a boring and obvious win in addition to the actual solution.
Mar-20-18  cormier: <patzer2:> 28. Nc2 Rxd2 29. Rxe4 Qd8 30. Ne3 = (0.00 @ 26 ply, Stockfish 9) holds it level. ... <ths man> .....

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