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Olle Engstrom vs Argiris Koumtsis
IBCA European Individual Championship (2007), Durham ENG, rd 3, Aug-16
Queen's Gambit Accepted: Rosenthal Variation (D21)  ·  1-0


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sac: 13.Bxh7+ PGN: download | view | print Help: general | java-troubleshooting

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Premium Chessgames Member
  kevin86: A classic the theme of "♗x♙+ ♔x♗ ♘-♘5+ wins! Horray!!
Jun-15-11  mworld: <David2009> nice post. Really brought out the richness of the position and defenseive ideas that a resourceful player could employ to frustrate.
Jun-15-11  Ghuzultyy:

click for larger view

Bishop sac looks tempting.

<13.Bxh7?! Kxh7 14.Ng5+ Kg6> Any other move leads to mate.

A)14...Kh6 15.Qg4 Nf5 16.Qh3+ Kg6 17.Qh7#
B)14...Kh8 15.Qh5+ Kg8 16.Qh7#
C)14...Kg8 15.Qh5 Re8 16.Qxf7+ Kh8 17.Rd3 Nf5 18.Rh3+ Nh6 19.Rxh6+ gxh6 20.Qh7#

This move is the hardest one to find in this puzzle.

Didn't feel right when I first thought of this move but it is strong.

h5+ is a serious threat.

Starts a discovery attack by sacrificing h4.

click for larger view

<16...Rxh4 17.Qe4+ f5 18.exf6+ Kxf6> 18...Nf5 can't be played. White can win both the knight and the rook with 19.gxf5+

click for larger view

<19.Qf3+ Nf5 20.gxf5 Bxc3 21.fxe6+ Ke7 22.Qf7+ Kd6 23.dxc5+ Kc6 24.e7! Qxe7 25.Qxd5+>

click for larger view

It's over. There may be other ways to win this but I liked h4 variation.

Jun-15-11  Ghuzultyy: EGT against my line:

13.Bxh7+ Kxh7 14.Ng5+ Kg6 15.h4! Rh8 16.g4! Rxh4 17.Qe4+ Nf5!?

(Out of line.)

18.gxf5+ Kh5 19.Qf3+ Rg4+ 20.Kh2!

<20.Kh1?? Nxc3! 21.bxc3 Qd5 and the advantage is lost.>

20...Nf4 21.Bxf4 exf5 22.Rg1 f6 23.Nf7! Qxd4 24.Ne2 Bd2 25.Nxd4

Won the queen!

25...Bxf4+ 26.Kh1
and there is no big threat. White wins.

Jun-15-11  VincentL: "Medium/Easy".

First there is the standard 13. Bxh7+ Kxh7 14. Ng5+ Kg8 15. Qh5 followed by 16. Qh7 mate.

Black can play 15.....Re8 (the only way to prevent Qh7 mate), then white continues 16. Qxf7+ Kh8 17. Rd3 Ng8 18. Rh3+ Nh6 19. Rxh6+ gxh6 20. Qh7 mate.

There are some other defensive options.

14....Kh6 15. Nxf7+ wins the black queen.

14....Kg6. I am actually struggling after this move. I have tried Qd3+, Rd3, Qe4+ and Qg4 but I cannot find anything decisive.

13... Kh8. Again I see nothing decisive in the short term, although white gains a pawn and has a superior position.

I am missing some key idea in this puzzle. My time is up, and rather embarrassingly I have to check to see how this panned out.

Jun-15-11  scormus: Nice instructive puzzle.

I had almost no time this morning, so went for 13 Bxh7+ and anticipated more or less the game continuation, even though .... <Jim, and others> ... the possibility of 14 ... Kg6 muddies things.

I seem to remember reading, was it Harry Golombek's classic book (my only chess tutor for several years) that B's best chance of surviving the Greek Gift is ... Kg6, and then its usually Qg4. The win is there but not so simple.

I rather like <Ghuzultyy 15 h4> but OTB I would almost certainly have played the "standard" Qg4 and trusted my instincts to find a way through

Jun-15-11  sevenseaman: <Ghuzultyy> Liked your <15. h4> variation as I had tried it myself. I did not follow it through because when I backed it up with <16. g4> the White K started looking uncomfortably bare. Half baked approach.

Its an interesting, natural line organic to the need of the position. Nice analysis!

Jun-15-11  MaczynskiPratten: I spent most of my time looking at the Kg6 variation because (a) Kg8 looks suicidal (maybe Black was wrongly relying on his Nf5 manouvre) (b) Kg6 is the standard defence (c) I couldn't see a clear win after 15 Qg4 f5 even though Qg4 is the "standard" move here. I found and chose 15 Qd3+ as spotted by <TheBish> but didn't feel I'd analysed it to a clear win. <Ghuzultyy>'s 15 h4 is neat. But the length of the continuations makes this at least a Friday puzzle if it's thoroughly solved - as other kibitzers have found.
Jun-15-11  Ghuzultyy: <Squares: What's the continuation if black decides against taking the bishop?> Glad you asked;

13...Kh8 14.Ng5 g6 15.Qf3 Kg7 16.Qh3 Rh8 17.Nce5 cxd4


click for larger view

What is the best move for white 18.?

Premium Chessgames Member
  DarthStapler: Got it
Jun-15-11  noendgame: I think I have a great idea for improving the Daily Puzzle and I would like to see if others agree.

I'm sure that some readers get out their boards and others their favorite software, but I am too lazy for that. I stare at the home page for a minute or two first. On Monday, that's usually enough. As the puzzles get harder, I need to move some pieces and turn to the puzzle page. The problem is that it is all too easy to see the question move and those that follow. I've tried blocking with piece of paper but that is awkward at best.

So here is what Chessgames should do: when you go to the puzzle page, only the moves up to the question move are visible! You can go backward or forward by using the arrows, but the question move is not revealed until you hit the "next" arrow!

If the programmers have some difficulty with this, an alternative might be for the puzzle to come up without any move from the question move on available and a "See Solution" link at the bottom of the page. The first alternative is cleanest to me.

What do you all think?

Jun-15-11  rogl: It was obvious 13.Bxh7+ was the first move. I saw
14.♘g5+ ♔g6(♔g8 is a horrible move)
15.♕g4 f5
16.♕g3 f4

click for larger view

with a promising position but I couldn't find a decisive continuation so I let my dear friend Rybka 4 have a look. This is what he came up with:

13.♗xh7+ ♔xh7
14.♘g5+ ♔g6
15.h4! ♖h8
16.g4! ♖xh4
17.♕e4+ f5
18.exf6+ ♘f5
19.♘xe6! ♗xe6
20.gxf5+ ♗xf5

click for larger view

Slightly harder than a normal Wednesday problem, no?

Jun-15-11  wals: Rybka 4 x 64

Working backwards

14...Kg8 +#7. The game was virtually over. Kg6, +3.14 would have allowed Black some chance.
Black resigned after 19.Rxh6+, +#1.

13...Kxh7, +3.14.

12...Nfd5, +3.77. Best, c4, +1.34.
Shortfall, 2.43

11...c5, +1.35. Best, Ng6, +0.83.
Shortfall, 0.52.

10.Rd1, 0.64.

Black shortfall, 2.95.
Rybka analysis 13...+3.14.

Jun-15-11  rilkefan: <<noendgame>: I think I have a great idea for improving the Daily Puzzle and I would like to see if others agree.>

I think that's a great suggestion, in part because I've made it here myself. I guess the official forum would be a better venue though.

Jun-15-11  WhiteRook48: first four moves- yes, the rest? I failed
Jun-15-11  Patriot: <noendgame> I don't understand how it would help to see the moves leading up to the puzzle position. It's a curiosity sometimes to see how we get to such crazy positions. It would be more convenient if the game defaulted to the puzzle position after clicking the puzzle, instead of having to find the move number to see what was actually played. But that's just my opinion. Interesting idea though!
Jun-15-11  stst: No immediate mating net & don't want to delay knocking off the K from its comfortable g8, so one main line: 13.Bxh7+ Kxh7
14.Ng5+ Kg6
(IF ..Kh8/g8, 15.Qh5 onto h7#;
IF Kh6, 15.Nxe6 dis+ by B forks Q&R)
15.Qg4 pending Nxe6 dis+ forks, or h4 pending Qh5, pending Kf5 then 16.Nxf7 dis+ capturing Q next.) Bed time after watching Bruins capture the Stanley Cup in our neighbor's place!!
Jun-15-11  stst: <noendgame>: "I think I have a great idea for improving the Daily Puzzle...What do you all think?"

-- I think the easiest way is to pose the solution only on the next day! Even so, Kibitzers could still discuss/argue on the puzzle day, and quite many could hit the right solution. This would arouse interest while keeping you at least excited/eager/frustrated (depending how confident you think you already got it right) for a day!!

Jun-16-11  M.Hassan: "Medium/Easy" White to play 13.?
Sides are equal

It is obvious that White wants to attack through h7:

13.Bxh7+ Kxh7

In here, the game may follow either of the following lines: A: If the King returns to row 8
B: If the King moves to row 6
I have gone through both lines as in the followings:

Line A
15.Qh5 Re8 (to open room for King)
16.Qxf7+ Kh8
17.Rd3 Nf5
18.g4 Nh6
19.Rh3 Re7
20.Rxh6+ gxh6
21.Qh5 Qf8
Looks like that Black that was attacked is slightly up now

Line B: if the King moves to row6:
15.Rd3 Rh8
16.Qg4 f5
17.exf6 Nxf6
18.Qg3 c4
19.Rf3 Bxc3
20.bxc3 Nf5
21.Qe5 Qd5

click for larger view

In here also, Black is slightly up although his King is not in a suitable position

Jun-16-11  Squares: Cheers teddyo and Ghuzultyyfor your responses
Jun-16-11  Ghuzultyy: Anyways, my question's answer is 18.a3!
Jun-17-11  Squares: Black moves bishop a5. You are probably seeing this puzzle way more clearly. But I don't understand why everybody appears to have discarded the option of not taking the bishop on move 13
Jun-17-11  Ghuzultyy: Try to analyse the position after 18...Ba5

Black loses queen by force.

Jun-17-11  Ghuzultyy: I wrote the answer in my forum in case you are still looking for the answer.
Premium Chessgames Member
  DarthStapler: I never use boards or computers to solve them, I just look at the position and do it in my head. If you ask me that is the best way to do it.
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