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Janko Saradjen vs Miodrag Perunovic
Open Portoroz 04 (2004), Domen Lucija, rd 7, Apr-16
Polish Opening: General (A00)  ·  0-1
ANALYSIS [x]

FEN COPIED

find similar games 1 more J Saradjen/M Perunovic game
sac: 23...Rxd4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Oct-14-14  diagonalley: yep 23 .... RxN wins B+N for R ... but a bit more intricate than is usual for a tuesday
Oct-14-14  plumbst: Easy. Material is even. Black's Rook is under attack.

The d and e-files are the key here.

23...Rxd4! (not 23...Nxd4 24.Nxd5 Nxe2 25.Nxe7+ Bxe7 26.Kf2 trapping the Knight)

24.Bxd4 Nxd4 (24.exd4 Nf4+; 24.Rxd4 Nxd4)

25.Qd3 Ne6.

Black wins 2 pieces for a Rook with a great position.

Oct-14-14  Cheapo by the Dozen: The obvious idea is to exploit the e-pawn pin to win a piece at d4. The obvious difficulty is that White threatens to take the d5 rook. A second difficulty in some lines is White's option of Nxe6.

The solution is to just play 23 ... Rxd4, abandoning the hope of winning a full piece and settling for the advantage of two pieces against a rook. So my main line is

23 ... Rxd4
24 Bxd4 Rxd4

Notes on that include:

Black captures with the rook the first time to avert Nxd5.

Black captures with the rook the second time to avoid a d-file pin.

White can't respond to either rook capture with exd4 because of ... Nf4+.

Oct-14-14  Cheapo by the Dozen: My precaution to avoid the pin turns out not to have been needed. On the other hand, perhaps it's slightly superior anyway in that it speeds up simplification in a position where Black has the material advantage.
Oct-14-14
Premium Chessgames Member
  gofer: <23 ... Rxd4>

24 exd4 Nf4+ the queen

24 Rxd4 Nxd4 the minor piece

<24 Bxd4 Nxd4>
<25 Qf2 Nc6>


click for larger view

Black is an exchange down but a minor piece up, not a definite win as Black has some back rank weakness, but okay...

Oct-14-14  Cybe: The best line after 23… R:d4 is 24. B:d4, 24…N:d4, 25. Qd3 – and then White’s position is not so critical.
Oct-14-14
Premium Chessgames Member
  patzer2: With the moves played in this game, today's Tuesday combination solution, starting with the forcing 23...Rxd4!, looks simple and obvious.

However, the combination seems simple only because 24. exd4? loses on the spot to the discovered attack with check tactic 25. Nf4+!

White can put up much more resistance with 24. Bxd4 (diagram below).


click for larger view

Here Black's best is 24...Nxd4 when Fritz gives best play as 25. Qd3 Qe6! 26. Nc4 Nc6 27. Qc2 (diagram below).


click for larger view

With Bishop and Knight for a Rook, Black has a clear and strong advantage. Yet the win from here is no longer so simple in this "easy Tuesday" puzzle solution.

Oct-14-14  eblunt: I had 23 ... ♖xd4 (not 23 ... ♘xd4 24. ♘xd!) 24 ♗xd4 ♘xd4 and black has ♗ and ♘ for ♖ but I don't see better than that.

Obviously the text is a huge blunder by white; with best defence white has (just) lost the exchange , but there's plenty of fight left in his position IMO.

Oct-14-14  Ratt Boy: 23.Nb6?? is a huge blunder, like casting Adam Sandler in a movie. ♕c2, followed by ♘xe6 (or ♘b5) and e4, should be okay, though Black still looks better.
Oct-14-14
Premium Chessgames Member
  Oxspawn: The white queen is hidden but unprotected which means that the e pawn can be pinned. A black rook on d2 would win the queen if not prevented by the rook on d1. So it looks like a job for a battering ram. The black rook on d5 is under threat, but if black starts with the knight to open the threat from the black queen, after the next two moves both queens are under attack and white’s threat includes a check which trumps black. 23. Nxd4
24. Nxd5
Maybe 24. …. Nxd4 works here but it looks dangerous to me….

Let’s go back
23. Rxd4
24. Bxd4 Nxd4
25. Bxd4 Rxd4
Seems to leave black a piece up since white cannot retake with the pawn. Black is also threatening Rd2. Is this enough? White can play on a piece down and still has the rook on a1 and an advanced (but unprotected) knight. Feel like I have missed something obvious. Will post and then look.

Oct-14-14
Premium Chessgames Member
  Oxspawn: Can't lay claim to the game line but then it didn;t occur to me that white would play ed4!
Oct-14-14
Premium Chessgames Member
  Willber G: I think CG missed the alternative to the game move by white as (as has been pointed out) the outcome is less clear cut than is appropriate for a Tuesday.
Oct-14-14
Premium Chessgames Member
  Penguincw: 24...Nf4+ was in my solution. :)
Oct-14-14  goodevans: <Willber G: I think CG missed the alternative to the game move by white as (as has been pointed out) the outcome is less clear cut...>

Not so much "less clear cut" as simply "less good". <23...Rxd4> is the best move and that is what we've been asked to find. There is no "alternative" solution.

Oct-14-14  Chess Dad: At my first look, d4 looked like a likely target. Adding up attackers and defenders, and it looked to be attacked three times, defended three times.

But after a little more study, it's clear that only two defenders are mobile, because the pawn on e3 is stuck in place defending the queen.

So, the plan is

23... Rxd4 24. Bxd4(Rxd4) Rxd4 25. Rxd4 (Bxd4) Nxd4.

White can decline at any time, leaving Black up either N alone, or R for B/N or 2R for R/B/N.

Oh, and if White blunders and moves the pawn, then we get the game line and snag a free queen.

Oct-14-14  awfulhangover: 24.exd4???
Oct-14-14
Premium Chessgames Member
  Sally Simpson: Black to play. White has just played 23.Nc4-b6


click for larger view

Pre-move scan:

"Is there an unprotected piece in the position?"

Yes - two.

"Is there a check in the position."

Yes.

"Is there any way you can take advantage of this?"

That is usually how one spots such shots. If the answer to question one is three pieces then really dive into the tank. Most non-mating combinations (both tactical and positional) always involve an unprotected piece(s).

23...Rxd4 24.exd4


click for larger view

24...Nf5+ 0-1.

Although there is no clockwork finish in after game analysis if White does not play 24.exd4, Black is on top. It is enough to spot the shot. You are not going to spot it and dismiss it because it does not lead to a pure and clean 100% win.

I wonder if the lad spotted 24...Nf5+ but quickly decided he could answer it with 25.Kf1 protecting the Queen. [25.Kf1 Qxe2+ mates]

Thinking the idea behind Black's exchange sac was to take the e-pawn away from covering f4. Thinking Black's intention was...


click for larger view

....to play Nh5 threatening N's-f4+

Just a wee hobby of mine. I like solving puzzles but also try to figure what may have benn going through the losers mind when they played the losing blunder.

Oct-14-14
Premium Chessgames Member
  playground player: When I come to grief in the Polish Opening, it's very often because I've allowed Black to establish a Knight on the fourth rank. I have had to learn not to allow that.
Oct-14-14
Premium Chessgames Member
  kevin86: Missed it. Was looking at Nf4+ but couldn't come up with a reply after gxf4.
Oct-14-14  BOSTER: Because with correct defense black has only
the bishop plus knight for the rook, I don't think
this is a puzzle according <CG>.
Oct-14-14
Premium Chessgames Member
  mooseheadchris: I saw 23...Rxd4 as the obvious move, but discounted it due to 24.Nc8!?

This attacks the queen which either forces the queen off the file (and thus eliminating the threat against white's Q) or forces the rooks to discommunicate allowing a simple B+N=R exchange.

I still can't see a winning line for black after 24. Nc8.

Can somebody shed light?

Oct-14-14  goodevans: <mooseheadchris> Nc8 is a nice try but the option you seem to have overlooked is for Black to drop his ♕ back to e8.
Oct-14-14
Premium Chessgames Member
  Willber G: <goodevans: <Willber G: I think CG missed the alternative to the game move by white as (as has been pointed out) the outcome is less clear cut...>

Not so much "less clear cut" as simply "less good". <23...Rxd4> is the best move and that is what we've been asked to find. There is no "alternative" solution.>

I was talking about white's reply, 24.exd4, certainly suboptimal.

Oct-14-14
Premium Chessgames Member
  Willber G: <BOSTER: Because with correct defense black has only the bishop plus knight for the rook, I don't think
this is a puzzle according <CG>.>

Certainly not a Tuesday puzzle...

Oct-14-14
Premium Chessgames Member
  morfishine: <BOSTER> You have a point that with correct defense White can soldier on, though at distinct disadvantage.

As you can see, <patzer2> demonstrated a very strong line for Black, which admittedly, does not fit the "Tuesday Mold". However, the point is clear and fairly enjoyable if for no other reason than this puzzle stimulated insight and analysis and hence, some hope of self improvement.

Deviating from <patzer2>'s analysis, I thought an immediate <25...Nc6> was sufficient to establish superiority, but thats just me.

*****

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