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Eduard Prandstetter vs Lubomir Ftacnik
CSR-ch (1986), Prague CSR, rd 6, Jun-??
Sicilian Defense: Scheveningen. Classical Variation (B84)  ·  1-0



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Kibitzer's Corner
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Feb-15-08  RandomVisitor: 35.h4! Rf5 36.hxg5 hxg5 37.Nh3 Qd8 38.Rg4 .
Feb-15-08  Jesspatrick: It's clear that both players were in severe time trouble approaching move 40.

As <Random Visitor> points out. 40...Qb5 is winning for black.

Feb-15-08  euripides: 10.Bf3 seems to be unusual here, but Prandstetter had already played it against Ftacnik and had rather the better of a draw:

E Prandstetter vs Ftacnik, 1985

It was a real achievement to repeat this line against Ftacnik and win; White seems always to be better except for the nearly fatal 39.Nd7 ?

On this evidence, 10.Bf3 might deserve some more attention - where did Ftacnik go wrong ?

Feb-15-08  just a kid: I got 44.Rd8!,but after a long time of thinking.
Feb-15-08  JohnBoy: I'm thinking that 44.Qh5 and 45.Ng4 is also an effective sequence. Any prog evaluations here?
Feb-15-08  zanshin: <JohnBoy> Preliminary eval (20-ply) shows 44.Qh5 is Rybka's 2nd choice after 44. Rd8. It is answered by 44...Qf7, preventing your immediate Ng4.
Feb-15-08  hovik2003:

This one was kind of brainy, first I tried 44.Ne8+, but that doesn't help after king moves to safehouse g6 instead of expected f7 or f8 square to take the knight, so then I tried 44.Qh5 to cover g6 square before knight check on e8, this is better but still not forcing giving black free tempo to get together his deffensive act by 44...Qf7!(44...Qb8? 45.Ng4!) to exchange the queens and I don,t see how white could improve his position, then suddenly iI don't know why after ten minutes I saw 44.Rd8 to threaten white king directly on g8 square so now black has couple of moves:

A)44...Rxf6 45.exf6+ Kxf6 46.Qd4+ Kf7 47.Qxb4 wins easily for white B)44...Qc7? 45.Rb8+ Kf7 46.Qh5+ Ke7 47.Qe8#
C)44...Rxe5! 45.Qd4!!( This beautiful move pins all the black pieces with one stroke and protects white knight in skewer fashion beside other moves like 45.Nh5+ Kh7 46.Nf6+ I think draws)so now:

if 45...Qc7 46.Ne8+ wins the black queen
if 45...Rf5 46.Nh5+ Kf7 47.Qg7# ,so king should take the knight by 45...Kxf6 and now:

if 45...Kxf6 46.Rf8+ Kg6 47.Qxe5 Qe7(...Qg7 48.Qxc5 wins) 48.Rg8+ mates if 45...Kxf6 46.Rf8+ Ke7 47.Qd8#
if 45...Kxf6 46.Rf8+ Kg7 47.Qxe5+! Kxf8 48.Qh8+ wins the black queen and the game.

None of the puzzles in last ten days took so much time for me as this one, I think either my chess feel was numbed or this was really tough nut to crack.

Premium Chessgames Member
  Jimfromprovidence: Does the mate threat after 43...Qa1 allow black to equalize?

click for larger view

Feb-15-08  Zygote: Generally, a combination is a set of forced moves that leads to checkmate or a huge material gain, or stalemate. Many of the positions on here, although they feature checkmate, material gains, or stalemates do not involve forced variations.
Feb-15-08  ounos: I saw up to 46. Rf8+ Kg7 and discarded the line :-/
Feb-15-08  YouRang: One of those puzzles where the first move jumps out, but the follow-up is difficult. I found 44.Rd8 & its nice threats, but the continuation after ...Rxe5 was a bit beyond my grasp today.
Premium Chessgames Member
  kevin86: I see in the final picture that black is truly lost:eg.

47... ♔h7 48 ♖c8 ♘a6 49 ♖c6 ♕b7 50 ♕xe6 the threats are too much for black.

Feb-15-08  Marmot PFL: Saw this, and rejected it cause of 46...Kg7 47.Qxe5+ Kxf8, missing 48.Qh8+ picking up the queen.
Feb-15-08  Magic Castle: The key to the solution is that the best escape route for black to g2 or f2 to capture the white rook is reputed by a check on the 8th rank and then on the 7th snaring the unprotected black queen. The text only leads to mate in h7 or h4 both by a queen check in h8 or e1 (after the gpawn push check), as the case maybe.
Feb-15-08  dzechiel: I wish I had had more time to work on this last night. I don't know if I would have found the solution, but it's a beautiful ending, and I would have enjoyed trying.

This is the kind of position I used to like to have in correspondence games. It's very problem like and forcing.

Feb-15-08  euripides: <Jim> I think you're right. <43...Qa1> 44.Qe2 and one possibility is 44...Rh1+ 45.Kg3 Qe1+ 46.Qxe1 Rxe1 when 47.Rxb4 Rxe5 gives White very little. I wonder if White missed something better in the middlegame.

Premium Chessgames Member
  fm avari viraf: It's a very interesting position & needs some real drill work. After a little thought, I decided to discard 44.Nh5+, Ne8+ & Qe2 so the logical move would be 44.Rd8! threatening mate with 45.Rg8+ Kf7 46.Qh5+ Ke7 47.Qe8# or Re8#. Now, 44...Rxf6 would not alleviate the misery & so 44...Rxe5 45.Qd4 if ...Qc7 then 46.Ne8+ picks the Queen & later the King hence, 45...Kxf6 46.Rf8+ Kg6 if ...Ke7 47.Qd8# or ...Kg7 then 47.Qxe5+ Kxf8 48.Qh8+ K any 49.Qh7+ & the Black Queen is lost. 47.Qxe5 & Black is doomed. If 47...Nd7 then 48.Rg8+ Kf7 then 49.Qg7# or ...Kh7 then 49.Qg7# or Qh8# Now, even 48...Kh5 fails to 49.g4+ Kh4 50.Qg3#
Feb-15-08  wals: Noting think= what principal variation would fit the strategic demands of the position, What is the most relevant, What move would have black scrambling? Inspect board -
44. Rd8...Qf7 45.Rg8+...Qxg8 46.Nxg8 plausible

PM =
1/2 move right is better than no moves right I guess.

Feb-15-08  wals: Eduard Prandstetter - Lubomir Ftacnik, CSSR (ch) 42/284 1986 0 1

Analysis by Fritz 11: depth 21/40 time 8min27

1. (7.54): 44.Rd4-d8 Qa7-f7 45.Qg4-d4 h6-h5 46.Qd4xc5 Rf5xf6 47.e5xf6+ Qf7xf6 48.Rd8-e8 Kg7-g6 49.Qc5-d6 Qf6-f4+ 50.Qd6xf4 g5xf4 51.Re8xe6+ Kg6-f5 52.Re6-b6 b4-b3 53.Rb6xb3 h5-h4 54.Rb3-b6 Kf5-e5 55.Rb6-b5+

2. (2.31): 44.Qg4-h5 Qa7-f7 45.Qh5-e2 Rf5xf6 46.e5xf6+ Kg7xf6 47.Rd4-c4 Nc5-d7 48.Qe2-d2 Nd7-e5 49.Qd2-f2+ Kf6-g7 50.Qf2xf7+ Ne5xf7 51.Rc4xb4 Kg7-f6 52.Kh2-g3 Nf7-d6 53.Kg3-f3 e6-e5 54.Kf3-e3 Kf6-e6

(, 16.02.2008)

Feb-15-08  newzild: I got this one okay, but it took a good six or seven minutes. I wasted a couple of minutes trying to set up knight forks.
Feb-15-08  jovack: ya, this one wasnt one of the <20 seconds puzzles
Premium Chessgames Member
  johnlspouge: Friday (Difficult): White to play and win

Material: even. The White Nf6 has penetrated the Black K-side, supported by Pe5. The White Qg4 can use the light squares around Kg7 unhindered. The Black Nc5 must prevent Rd4 from penetrating the 7-th rank. The Black Qa7 has a discovered attack through Nc5 on Rd4, and Rf4 threatens Pe5, but ...Rxe5 would block critical escape squares for Kg7, and in some lines, result in White's skewering Qd7. The only Black piece near Kg7 is Rf5, and except for removing the support of Nf6, ...Rxe5 makes Rf5 temporarily unable to contribute to K-side defense.

Candidates (44.): Ne8+, Rd8, Qh5, Nh5+

44.Rd8 (threatening 45.Rg8+ Kf7 46.Qh5+ Ke7 47.Qe8#)

Only one move removes the threat.

44...Rxe5 [Kf7 45.Qh5+]

45.Qd4 (threatening 46.Qxe5 and Nh5++ if Re5 moves)

45...Kxf6 [Qc7 46.Nd8+]

46.Rf8+ Kg7 [Ke7 47.Qd8#]

47.Qxe5+ Kxf8 [Kg6 leads to mate] 48.Qh8+ and skewers the Qa7 next move

Time to peek. Initially, I missed the skewer justifying 46.Rf8+. I will check the kibitzing later, but the initial move is very important and difficult to sort out from the alternatives. I chased down all the dead ends with the heavy pieces, but now I must reward my daughter's patience.

Feb-15-08  zenpharaohs: Oh well. I had 43 Qh5 or 43 Qd1. I never saw 43 Rd8. At least Rybka says I had the second and third best moves. I have missed two in a row now this week.
Feb-16-08  LivBlockade: I considered the solution through 45. Qd4 but did not analyze it far enough. So I chose the line discussed above by <JohnBoy> and <zanshin>. <Preliminary eval (20-ply) shows 44.Qh5 is Rybka's 2nd choice after 44. Rd8. It is answered by 44...Qf7, preventing your immediate Ng4.> I planned 44. Qh5 Qf7; 45. Ne8+ Kf8; 46. Qxf7+ Kxf7; 47. Nd6+ followed by Nxf5 and Rxb4 which seemed like an easily won endgame.
Premium Chessgames Member
  patzer2: For the Feb 16, 2008 puzzle solution, White's 44. Rd8!! sets up a winning attack against Black's helpless King.
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