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Tarek Goutali vs Luis Pan Zhang
Olympiad (2008), Dresden GER, rd 11, Nov-25
Formation: King's Indian Attack (A07)  ·  0-1


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sac: 29...Rxg2+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  patzer2: For an early White improvement, the apparently untested computer suggestion 8. e5 ⩲ to ± (+0.72 @ 22 ply, Stockfish 9 analysis of move 8.?) looks good.
Apr-23-18  diagonalley: after black's 30th move, the engine gives mate in ten(!!) ... a monday puzzle(?!) ... if so, then i'm genghis khan's brother-in-law
Premium Chessgames Member
  ChessHigherCat: <diagonalley: after black's 30th move, the engine gives mate in ten(!!) ... a monday puzzle(?!) ... if so, then i'm genghis khan's brother-in-law>

So you are married to Genghis's sister Gingi Vitis Khan? She has notoriously bad breath, so you must have married her for her musk oxen. Does that explain your avatar?

That said, I agree about the puzzle. Not every Monday has to be a mate in 2 but a mate in 10?

Apr-23-18  leRevenant: What the others said.
Apr-23-18  et1: I missed it because I searched for an almost immediate solution, This is not "Monday".
Premium Chessgames Member
  gofer: This was very difficult for a <Monday>.

<29 ... Rxg2+>
<30 Kxg2 d4+>

All king moves get mated quickly and so does the only queen move.

31 Qe4 Qf2+
32 Kh3 Rh8+!

33 Kg4 Bxe4
34 Ne3 Rg8+
35 Kh3 Qxg3# or Kh4/Kh5 Qh2#

33 Qh4 Bg2+
34 Kh2 Bf3+ (34 Kg4 Qf5#)
35 Kh3/Kh1 Qg2#)

<31 Re4 Qxe5>

click for larger view


But this is not really <Monday> stuff...

Premium Chessgames Member
  malt: 29...R:g2+ 30.Kh1
(30.K:g2 d4+
31.Kg1 Qf2#
31.Kh3 Qh6+ 32.Kg4 Bf3#
31.Kh2 Rh8+ 32.Qh5 R:h5+ 33.Kg1 Rh1# )

30...Q:e5 31.R:e5 d4 32.Re4 Rgf2 33.Kg1 B:e4 34.de4 d3

A bit more than your average Monday

Apr-23-18  mel gibson: I saw the first move easily.

Stockfish 9 says:

29. Qxe5 Rxg2+

(29. .. Rxg2+ (♖f2xg2+
♔g1-h1 ♕f6xe5 ♖e1xe5 d5-d4 ♖e5-e4 ♖g2-f2 ♔h1-g1 ♗b7xe4 d3xe4 d4-d3 ♖c1-d1 ♖f2xb2 a2-a4 ♖b2-c2 ♘f1-d2 ♖c2xc3 ♔g1-g2 ♖c3-c2 ♔g2-h3 ♔c8-c7 ♘d2-b1 c5-c4 ♘b1-a3 ♖c2-e2 a4-a5 b6xa5 ♘a3xc4 ♖f8-h8+ ♔h3-g4 ♖e2xe4+ ♔g4-f3 ♖e4xc4 ♖d1xd3 ♖h8-f8+ ♔f3-g2 ♖c4-c2+ ♔g2-h3 ♖f8-h8+ ♔h3-g4 a5-a4 ♔g4-f3 ♖c2-c4 ♔f3-g2 ♖h8-f8 ♔g2-h3 ♖c4-c2 ♔h3-g4 ♖c2-e2 ♖d3-c3+ ♔c7-b6 ♖c3-c4) +7.37/33 105)

score for Black +7.37 depth 33

Premium Chessgames Member
  whiteshark: What <areknames> said.
Premium Chessgames Member
  Richard Taylor: Fischer played the King's Indian Attack in I think the first or second US Champs. I tried it in tournament and found myself struggling. The idea is good.

Good finish by Black.

Apr-23-18  schachfuchs: In deed, the puzzle should start with 28....Rf2 - but still easy enough for maybe a tuesday!?
Apr-23-18  morfishine: A couple of themes at work here, first lets eliminate king defenders starting with <29...Rxg2+> Then after 30.Kxg2 we get the exposed check with <30...d4+>

Once I realized 31.Re4 was impossible due to 31...Qxe5 I stopped calculating figuring White King was caught in a mating net


Apr-23-18  WorstPlayerEver: Took me a bit longer than usual. 29... Rxf1+ 30. Bxf1 Qf2+ 31. Kh1 d4+ 32. Re4 did not work. It seemed also a bit long for a Monday. 29... d4 was quickly to put aside.

Then I tried 29... Rxg2 and it worked! 30. Kxg2 d4+ 31. Re4 Qxe5...

I feel pretty confident, because I somehow sensed that cg wanted to trick me into it with Re1-e4. So I calculated more than the usual 30 Monday secs.

Hasta la vista!

Premium Chessgames Member
  wtpy: Chcat, Well it is not forced mate so the almonds might have let you down: 29..Rg2 30 Kh1 Rh8+ 31 Kg2 d4+ 33Qe4 Be4 34 Re4 and white still has maybe a little fight left thought one would expect black to win easily because of exposed white king.
Premium Chessgames Member
  ChessHigherCat: < wtpy: Chcat, Well it is not forced mate so the almonds might have let you down: 29..Rg2 30 Kh1 Rh8+ 31 Kg2 d4+ 33Qe4 Be4 34 Re4 and white still has maybe a little fight left thought one would expect black to win easily because of exposed white king.>

Maybe I didn't annotate it right (surprise, surprise) but I meant that if Rxg2 and black declines the sacrifice with Kh1 then after Rh8+ the rook is still on g2 so Kg1 isn't an option (only Nh2)

Apr-23-18  Monocle: Isn't it usually preferable in the KIA to delay e5 until Black has committed to kingside castling?
Premium Chessgames Member
  varishnakov: Bit easy for a Monday.
Apr-23-18  Cheapo by the Dozen: There's a lot going on for a Monday puzzle.

Black sacs at g2 so as to bring White's king to g2. Once it's there, he discovers check on the long diagonal so that White's queen will be undefended on e5 if his rook interposes at e4. Amidst all that, we need to check that White has no good alternative to cooperation.

The line

29 ... Rxg2+
30 Kh1 Rh8+
31 Nh2 R(h8)xh2++

proves that White has to take the rook at some point while his queen is still being attacked. This leaves only one other serious try at a defense, namely

29 ... Rxg2+
30 Kxg2 d4+
31 Kh3 Rh8+
32 Kg4 Bf3++

Or if you didn't see the pretty ... Bf3++, then 32 ... Rg8+ wins quickly as well.

Premium Chessgames Member
  wtpy: Chcat, White plays 30 Kh1 after Rg2 and black plays 30..Rh8+ and the rook on g2 is hanging, kind of, because d4 still wins. This is certainly a better option for white than Nh2; black's flag might fall for one thing.
Premium Chessgames Member
  ChessHigherCat: <wtpy> okay, here's the line with the move numbers if you insist, which you obviously do:

30. Kh1 Qxe5 31. Rxe5 d4 32. Re4 Bxe4 33. dxe4 Rxb2

Premium Chessgames Member
  ChessHigherCat: Even in this case, 31. Kg1 isn't an option, as I said:

29. Qxe5 Rxg2+ 30. Kh1 Rh8+ 31. Kxg2 (Nh7 32. Rhxh7#) d4+ 32. Re4 Qxe5

Premium Chessgames Member
  ChessHigherCat: Here 32. Kg1 is an option, for what it's worth:

Rxg2+ 30. Kh1 Rh8+ 31. Kxg2 d4+ 32. Kg1 Rh1#

Premium Chessgames Member
  Penguincw: Almost forgot about today.

Coming off one of my best weeks ever, I think this may be my worst week.

29...Rxf1+ does not work because the rook covers f2. Gah.

0/1 this week.

Premium Chessgames Member
  Penguincw: Reading some comments, I noticed that this puzzle is a bit trickier than your average Monday puzzle. I want to make a game collection of the trickiest Monday puzzles ever. I haven't really started it, so I think this will be Game 1 of it. If anyone has suggestions, feel free to post them on my forum.
Premium Chessgames Member
  cormier: <<1. e4 Notes by Stockfish 8 (minimum 7s/ply)> 1... c5 2. Nf3 e6 3. d3 Nc6 4. g3 b6 <better is 4...d5 5.exd5 exd5 6.Nc3 Nf6 7.Bg2 Be7 8.d4 Bg4 = -0.17 (30 ply)>

5. Bg2 = +0.49 (28 ply)

5... Bb7 6. O-O Nf6 7. Re1 <better is 7.e5 Nd5 8.Re1 d6 9.c4 Nc7 10.d4 d5 11.Nc3 Be7 12.cxd5 + / = +0.56 (29 ply)>

7... Be7 = 0.00 (27 ply) <after 7...d5 8.exd5 Nxd5 9.Nc3 Nxc3 10.bxc3 Qd7 11.Bb2 Bd6>

8. Nbd2 d5 9. e5 <better is 9.exd5 exd5 10.d4 O-O 11.Nb3 h6 12.Be3 c4 13.Nbd2 Re8 = +0.27 (28 ply)>

9... Nd7 = -0.29 (27 ply)

10. Nf1 <better is 10.d4 O-O 11.Nb3 h6 12.c3 Rc8 13.h4 Ba6 14.Bf4 Re8 15.Nh2 = +0.13 (28 ply)>

10... Qc7 = / + -0.55 (25 ply) <after 10...O-O 11.h4 b5 12.c3 b4 13.Bf4 a5 14.a3 h6 15.Rb1 Qb6>

11. Bf4 <better is 11.c3 d4 12.N1d2 O-O 13.Nb3 Rfd8 14.cxd4 Nxd4 15.Nbxd4 = -0.20 (25 ply)>

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