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Jan Timman vs Stefano Tatai
Amsterdam IBM (1977), Amsterdam NED, rd 4, Jul-01
Italian Game: Evans Gambit. Anderssen Variation Cordel Line (C51)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Sep-24-05  Raskolnikov: Nice combination by Timman: the motif is "Clearance". After 28...de White continues with 29.♖d1 cutting the black ♔ off. If 29...♕d6, then not 30.♖:d6?? since 30...♖b1 but 30.♕h8+ ♔d7 31.♖:d6+.
May-17-07  chessmoron: White wins Queen with 28.Ne5 dxe5 29.Rd1 Threatening mate Rg8. Qd6 30.Qh8+ (NOT Rxd6) 30...Kd7 31.Rxd6+
May-17-07  dzechiel: Now, here it is a Thursday puzzle, and I get the move right away. After 28 Ne5 the threats are 29 Rg8# or 29 Qh8#.

You can run, but you can't hide. On 28...Kf8 29 Qh8#. 28...Kd8 29 Rg8+ Kc7 30 Qxe7+ Kb6 31 Rb1+ and 32 Qxb7. On 28...dxe5 29 Rd1 (mentioned by <Raskolnikov>) closes the trap on the black king.

May-17-07  Counterpoint: Ne5 wins in all variations:

If 28...Kd8 29.Rg8+ Kc7 30.QxR+ Kb6 31.Qxd6+

(1) 31...Kb5 32.Rb1+ (and white mates QxQ or Qa3)

(2) 31...Ka5 32.Nc6+
(2.1) 32...Ka4 33.Qc5 - and black can't stop Re4+
(2.2) 32...Kb5 (or Kb6) 33.Rb1+

Black loses his queen (if 33...Kb6) or if (33...Ka4, Ka5, Kc4) white mates with (34.QxQ, Qa3 or Qd4).

May-17-07  MostlyAverageJoe: Yup, CG is definitely letting us easy after the nasty Tuesday puzzle (which, they argue on chessgames.com chessforum, was was just right difficulty-wise. Yeah, rrright).

First, consider the obvious 28.Rg8 Kd7. Then Ne5 to open d-file (or win a rook), and the black king escapes. No good.

So, switch the things around: 28 Ne5, threatening Rg8# or Qh8#. If 28 ... Kd8, then Rf8 wins the rook with continuing attack. Good. Hence, black must play 28 ... dxe5, and 29. Rd1 threatens mate in one again. Black must start sacrificing material on d-file.

29 ... Bd5 is not good, because of Rf8+, followed by Rd5+, Qe5+ and mate in the next move.

Either 29 ... Red5 or 29 ... Rbd5 allow 30. Rg8#. So, the queen must go. 29 ... Qd3 is pointless because of 30.Rgxd3. So, the forced line is: 28 Ne5 dxe5 29. Rd1 Qd6.

White cannot take the queen quite yet because of Rb1#. So, chase the king so we can take the queen with a check and get a tempo to prevent the back-rank mate: 30. Qh8+ Kd7 31. Rxd6 Kxd6, and now we're OK. 32. Rd3+, return the rook to the first rank, and win eventually.

May-17-07  MostlyAverageJoe: <RandomVisitor> This was quite surprising analysis of 28.h4, before you deleted the 16-ply results :-)

However, I think 16 plies are not enough. For example, in the line: 28.Ne5 dxe5 29.Rd1 Qd6 ..., at 16 plies Hiarcs agrees with Rybka on 30.Rg8+, but at 18, it prefers 30.Qh8+.

May-17-07  RandomVisitor: 1: Jan Timman - Stefano Tatai, Amsterdam 24/249 1977


click for larger view

Analysis by Rybka 2.3.1 mp :

(18-ply)
1. (2.38): 28.h4 Qxc4 29.Rc3 Qxc3 30.Qxc3 f5 31.g4 Rb5 32.Qf6 Kd7 33.a4 Rc5 34.Rb1 Rc7

2. (2.37): 28.Ne5 dxe5 29.Rd1 Qd6 30.Rg8+ Kd7 31.Rd8+ Kxd8 32.Rxd6+ Rbd7 33.Qh8+ Kc7 34.Rxd7+ Rxd7

3. (2.24): 28.a3 Qxc4 29.Rc3 Qxc3 30.Qxc3 Rec7 31.Qd3 Kd7 32.Rd1 Rb6 33.Qxh7 Rc3 34.h4 Rxa3

4. (2.07): 28.h3 Qxc4 29.Rc3 Qxc3 30.Qxc3 Rec7 31.Qd3 Kd7 32.Qxh7 Bxa2 33.h4 Be6 34.h5 Rb2

May-17-07  MostlyAverageJoe: Hey, <RV>, is this a frequent phenomenon with Rybka that the best move oscillates between two choices with the increasing depth of analysis? I am referring here to your previous 2 posts for 16 and17 plies that are now gone...

Just curious. BTW, this puzzle has triggered quite weird behavior in Hiarcs (see my forum for details).

May-17-07  MrExtra: How about 28.Qh8+ Kd7 29.Ne5+...?
May-17-07  openingspecialist: <MrExtra> you're not alone with Qh8+ Kd7 Ne5+ i thought for a little while on this say 15 min convinced that you dont quite win but you in fact do I'm pretty sure after my analysis looking at the puzzle. I think maybe Ne5 was better though. I'm not 100% sure on it. Ill analyse with Fritz10 and keep posted.
May-17-07  openingspecialist: Qh8+ Kd7 Ne5+ is a draw after dxe5 Rd1+ Kc6 as Rb3+ Bc4 = (0.00) blocks mating combinations. Best continuation is QxP at 0.46
May-17-07
Premium Chessgames Member
  cu8sfan: I'm with <MostlyAverageJoe> here. This puzzle was rather easy. Definitely easier than Hard Tuesday.
May-17-07  Sasportas: The first time I got the solution for a Thursday puzzle after a few seconds. Because it was easy - I hope not: But would I have seen it OTB? Improbable.
May-17-07  PositionalTactician: Hmm, nice.
May-17-07  RandomVisitor: 1: Jan Timman - Stefano Tatai, Amsterdam 24/249 1977


click for larger view

Analysis by Rybka 2.3.1 mp :

(23-ply)
1. (2.71): 28.h4 Qxc4 29.Rc3 Qxc3 30.Qxc3 f5 31.g4 Rb5 32.Qf6 Kd7 33.a4 Rc5 34.Rb1 Bd5

2. (2.55): 28.Ne5 dxe5 29.Rd1 Qd6 30.Rg8+ Kd7 31.Rd8+ Kxd8 32.Rxd6+ Rbd7 33.Qh8+ Kc7 34.Rxd7+ Rxd7

3. (2.48): 28.a3 Qxc4 29.Rc3 Qxc3 30.Qxc3 Rec7 31.Qh8+ Kd7 32.Qxh7 Rc4

4. (2.37): 28.h3 Qxc4 29.Rc3 Qxc3 30.Qxc3 Rbc7 31.Qd4 Bc4 32.Ra1 Rc6 33.Qh8+ Kd7 34.Qxh7 Rc5

May-17-07  RandomVisitor: <MostlyAverageJoe><Hey, <RV>, is this a frequent phenomenon with Rybka that the best move oscillates between two choices with the increasing depth of analysis? >Usually that happens when the 2 moves are roughly equal in winning chances. However, after a few hours the machine usually settles on 1 move as best, but not always.
May-17-07  RandomVisitor: If Black had played

19...Bb4 20.Re2 Ba3 21.Nxa3 Rxe5 22.Nac4 Re8 23.a3 Bd7 24.d6 h6 25.f3 Ba4 26.Qd4 = (0.07) Depth: 20

he would have had a roughly equal game. Things started going downhill after 19...Bd7.

May-17-07  goodevans: Got it pretty quick, but then it was rather easy for a Thursday.

Perhaps someone needs to send the CG.com guys a calendar so they know what day it is. They seem to be all over the place with the puzzle difficulties this week!

May-17-07  Werewolf: Nice puzzle, but above all beautiful move by white... :)
May-17-07
Premium Chessgames Member
  gawain: A good Thursday puzzle IMHO. Not as easy as some of you thought. At least not for me. I looked and looked and though I saw the back rank checks I simply did not see that the d-file could be cleared and occupied first.
May-17-07  nimzo knight: I thought Rg8+ Kd7 Ne5+ followed by Rd1.
wht m I missing here ??
May-17-07  LIFE Master AJ: POTD / "Problem of the day"
Thursday; May 17th, 2007.


click for larger view

White: Kg1, Qf6, Nc4, Re1, Rg3; (White Pawns) a2, f2, g2, and h2. Black: Ke8, Qa6, Be6, Rb7, Re7; (Black Pawns) Pa7, d6, f7, and h7.

White to move. (28. ???)

Very cute. White cannot afford to be too carefree, his first rank is somewhat sensitive.

One of the main lines would be 28.Ne5!, PxN/e5; 29.Rd1!, Qd6!?; 30.Qh8+, Kd7; 31.RxQ/d6+, and Black could resign with a clear conscience.

May-17-07  twin phoenix: i'm surprised to say i actually got this one. a very pretty game. timman plays the gambit with flair and pinache.

surprised noone has criticized 6.--,Na5?? so i'll be first. what was he thinking giving back the gambit pawn just to get the the king bishop? a truly ugly move! whites pawn center should give him a clear advantage by move 7. look this game up under 'kids don't try this at home!'

May-17-07  MostlyAverageJoe: <nimzo knight: I thought Rg8+ Kd7 Ne5+ followed by Rd1. What am I missing here ??>

Black king escapes via c6.

May-17-07  MostlyAverageJoe: <RandomVisitor: (23-ply)> Hiarcs agrees, with these notes:

This line: <1. (2.71): 28.h4 Qxc4 29.Rc3 Qxc3 30.Qxc3 f5 31.g4 Rb5 32.Qf6 ...> appears to be further improved by 32. Rxe6 (+3.46, 18-ply from 32nd move, i.e., 5 extra plies compared to yours).

<2. (2.55): 28.Ne5 dxe5 29.Rd1 Qd6 30.Rg8+ Kd7 31.Rd8+ Kxd8 32.Rxd6+ ...> (+2.52, same depth as above)

So, sadly, silicon monsters found a boring <h4> move that seems to be better than the flashy <Ne5>.

Somehow, I doubt that black would've resigned after h4 ...

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