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Vitaly Chekhover vs Fyodor Ivanovich Dus Chotimirsky
URS-ch sf (1949), Vilnius, rd 3
King's Indian Defense: Fianchetto. Long Variation (E68)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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Apr-08-15  FSR: 46.Qxh8+ 1-0. Very easy, since unlike yesterday there aren't a multitude of variations to Chekhover.
Apr-08-15
Premium Chessgames Member
  agb2002: White has a bishop and a pawn for two knights.

The black rook and the knight on h8 protect the knight on g6. Hence, 46.Qxh8+:

A) 46... Rxh8 47.Rxg6+ Kh7 48.Rxd6+ followed by 49.Rxd7 or 49.Bxf5+ and White emerges a bishop an two pawns ahead.

B) 46... Qh7 47.Rxg6+ Rxg6 48.Qxh7+ Kxh7 49.Kf3 and White wins easily the subsequent pawn ending. For example, 49... Kh6 50.Bxg6 Kxg6 51.Ke4 Kf6 52.f4 Ke6 53.f5+ Kf6 54.Kf4 followed by g4 and the advance of the f- and g-pawns and/or the attack against the black queen side pawns.

C) 46... Kg5 47.Rxg6+ Rxg6 48.f4#.

Apr-08-15
Premium Chessgames Member
  Infohunter: Good old see-saw.
Apr-08-15
Premium Chessgames Member
  Once: Now that feels more like a Wednesday than yesterday felt like a Tuesday. If that makes any sense.

The trickiest variation seems to be 46. Qxh8 Qh7


click for larger view

Now 47. Qf6 leaves Black horribly tied up. White is ahead by a pawn and has threats of f4-f5 and Rxd6. Fritzie is saying it's mate in 13.

Mind you, that would be better than the obviously losing game line. I'm surprised that Black willingly walked into that. Maybe time trouble?

Apr-08-15  scormus: Perhaps CG responded to the feedback yesterday with a tuesday puzzle today. Deflection and discovered check day
Apr-08-15  SimonWebbsTiger: @<Once>

in the 46...Qh7 line, I suppose an ok line is also 47. Qxh7 Kxh7 48. Rxg6 Rxg6 and then winning a tempo for the pawn ending with 49. Kf3

Apr-08-15  erixn: Or even - in a more sadistic vein - (46...Qh7 47.Qxh7 Kxh7): 48.Txd6 . Notice that because of the double pin on the Ng6 Black can only move his king between h7 and h6 and his rook between g8 and g7. That must invariably lead to Zugzwang.
Apr-08-15
Premium Chessgames Member
  morfishine: White is down a piece, but a nice sequence, combining a variety of chess themes, turns the tables.

<46.Qxh8+> deflection, removal of the guard

46...Rxh8 47.Rxg6+ Kh7

<48.Rxd6+> exposed check

48...Kg8

<49.Rxd7> Ahead decisive material, White has a winning position

*****
<Once> I didn't see 46...Qh7, thanks for running through that

*****

Apr-08-15
Premium Chessgames Member
  CHESSTTCAMPS: White has B+P for 2 knights, but white's entire force is aimed at the exposed black king. White can remove two guards of the pinned knight with

46.Qxh8+! Rxh8 47.Rxg6+ Kh7 48.Rxd6+ Kg7 49.Rxd7+ Kf6 50.Rxb7 and black has likely already resigned by this point.

Apr-08-15  zb2cr: 46. Qxh8+ starts the combination.

There are two minor branches to deal with:

(a) 46. ... Kg5??; 47.f4#.
(b) 46. ... Qh7; 47, Qxh7+, Kxh7; 48. Rxd6 and White is up by 2 Pawns with a simple endgame win in view.

The main line is:

(c) 46. ... Rxh8; 47. Rxg6+, Kh7; 48. Rxd6+ and Black loses his Queen. White is up by B+2P with an easy win.

Apr-08-15
Premium Chessgames Member
  Bubo bubo: The Rg8 is overloaded with the protection of the knights. Therefore 46.Qxh8+ and now

A) 46...Rxh8 47.Rxg6+ Kh7 48.Rxd6+, and, winning back the queen, White is up a bishop and two pawns.

B) 46...Qh7 47.Qxh7+ Kxh7 48.Rxd6, and White can easily trade down to a pawn ending where he is up two pawns.

C) 46...Kg5 47.Qxg8, and Black is down a rook and will be mated soon.

Wednesday is the new Tuesday?!

Apr-08-15  TheaN: Wednesday 8 April 2015 <46.?>

White's down a piece for a pawn yet has a bind on the black position. Giving black the move however, will allow him to repair the damage partly by playing Qg7, getting all pieces back to the king. Alas, white's to move and he strikes. <46.Qxh8+!> either goes a piece up or simplifies.

A) <46....Kg5> escaping all the fuss might allow black a perpetual somewhere. In this case it leads to a nice mate though: <47.Rxg6+! Rxg6 48.h4+ Kg4 49.f3# 1-0>

B) <46....Qh7> accepting the loss of a piece, but still bringing the queen back to defense. This does not undo the pressure on g6 however. <47.Qxh7+! Kxh7 48.Rxd6!> the knight on g6 is pinned, and black is basically in zugzwang. White threatens to simplify on g6 and easily win the pawn endgame. If black does not want to continue the piece deficit endgame: <48....Kh6 49.Rxg6+ Rxg6 50.Bxg6 Kxg6 51.Kf3 > and white wins easily.

C) <46....Rxh8> by accepting, black got two defenders removed from g6 and white only one attacker. The king is the sole defender: <47.Rxg6+ Kh7 48.Rxd6+> white gains the queen back from the windmill with two pieces interest. Looking a few moves ahead, we see the black king is still in a bind being material down:

C1) <48....Kh6 49.Rxd7> simplifies by force due to Rh7+ and h4. If <49....Kg5 50.Rd6! h4 51.f4+ Kh5 52.g4#> black is mated.

C2) <48....Kg7 49.Rxd7+ Kf6 (Kf8/Kg8 50.Rd8+ ; Kh6 50.Rh7+ ) 50.Rxb7 > black is down a bishop and three pawns.

C3) <48....Kg8 49.Rxd7 > threatening Rd8+ and Rxb7, the black king finds himself stuck on the back rank and an easy white win.

C4) <48....Qf5> perhaps best as it repositions the bishop, however <49.Bxf5+ Kg7 (Kh8 50.Rd8+ ) 50.Rd7+ Kf6 51.g4 > is still dead lost for black.

Apr-08-15  TheaN: No idea how I thought the C1 line was legal. Probably mispositioned the white rook already on d7. Everything else seems fairly accurate.
Apr-08-15  wych: I found this one a lot easier than yesterday's.
Apr-08-15
Premium Chessgames Member
  Penguincw: Seems easier than yesterday. 46.Qxh8+, and white wins. If 46...Rxh8, then 47.Rxg6+ Kh7 48.Rd6+ followed by 49.Rxd7, and white is up a bishop and pawn. Alternatively, there's 46...Qh7, but 47.Qxh7+ Kxh7 48.Rxd6, and white is up 2 pawns. Not to mention, black is still in a pin.
Apr-08-15  stacase: So I played the what if I do this or do that game, and I tried Qxh8 last and it was pretty obvious what would happen.

As a little kid I learned that Rook Bishop old mill routine the hard way, my older brother took nearly every piece I had.

Apr-08-15
Premium Chessgames Member
  Beancounter: Easy for a wednesday
Apr-08-15
Premium Chessgames Member
  YouRang: Yeah, the answer to this puzzle did jump at me faster than yesterday's puzzle.

After 46.Qxh8, it practically plays itself. It nicely removes the two defenders of Ng6 and sets up a queen-recovering discovered check.

Apr-08-15  poachedeggs: A queen for a windmill...
Apr-08-15  nazgulord: Saw this almost immediately, unlike yesterday, though like <morfishine> I completely missed Qh7. Thanks to <Once> for discussing it.
Apr-08-15  mistreaver: Wednsday. White to play. 46. Medium/Easy.
I don't want to brag, but i saw this one instantly.
46 Qxh8!! Beautiful
46 ... Rxh8 only move that has any sense
47 Rxg6 Kh7
48 Rxd6
Time to check.
Apr-08-15  Moszkowski012273: 45...Qd8 would of let black hold the extra piece. (Still losing though)
Apr-08-15  A.T PhoneHome: That h8 seems so tempting - <46.Qh8+ Rxh8 (removing the guard of g6) 47.Rxg6+ Kh7 and...48.Rxd6>.

48.Rxd6; what a wonderful move! Queen is left to its demise as the big chief takes a hike. Removal of the guard (46.Qxh8+) and a royal attack (48.Rxd6 reveals a discovered check AND a threat to capture the Queen)

Apr-08-15
Premium Chessgames Member
  gawain: This one was quite easy for me! I did briefly try capturing on g6 first. When that failed (as it obviously does), the right path was clear. But it is a sweet setup anyway.
Apr-09-15
Premium Chessgames Member
  kevin86: White sacrifices the queen and then wins it back with a discovered check and wins a piece.
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