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Nikolai Krogius vs Nikolai Aratovsky
? (1945)
Philidor Defense: Hanham Variation (C41)  ·  1-0



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Given 41 times; par: 11 [what's this?]

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Kibitzer's Corner
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Jan-08-10  goodevans: <ZZer: I thought the answer was 7.Ne6 fxe6 8.Bxh6 gxh6 9.Qh5+ Kf8 10.Bxe6 Qe8 11.Qxh6#. Why not?>

I think your line needs looking into. Of course, black isn't forced to take the Ne6, but <7 Ne6 Qb6 8 Nxg7+ Kd8 9 Bxh6> looks to be pretty good for white.

However, I what I'm not so sure about is that after <7 Ne6 fxe6 8 Bxh6> black has both 8 ... d5 and 8 ... Nb6 at his disposal. One possible line is: <8 ... Nb6 9 Bxg7 Rg8 10 Qh5+ Kd7 11 Bxe6+ Kxe6 12 Qf5#>. Perhaps someone stronger than me would care to comment.

Jan-08-10  cyclon: I come up with a following suggestion; 7.Bxf7+ Nxf7 ( -Kf8 8.Ne6+) 8.Ne6 and NOW; (8.) -Qa5+ ( -Qb6 9.a5 Qb4+ [ -Qb5/a6 10.Nc7+] 10.Bd2 Qc4 [ -Qxb2 transposes to "main"-line] 11.Nc7+ [Nxg7+?? Black Queen gets to b5-a6] -K- 12.b3 Qxd4 13.Ne6+ wins the Queen) 9.Bd2 Qb6 10.a5 Qxb2 [what else?] 11.Bc3 Qxa1 12.Bxa1 Rb8 (or -Bd8) 13.Nxg7+, Whites clear advantage. (Or did I miss something?)
Jan-08-10  cyclon: Yes, I missed 10.c3. No full credit for myself about this puzzle. In game continuation White gains more material.
Jan-08-10  patzer2: Objectively, 6. 0-0 appears to be slightly better than 6. a4!? exd4 =, even though 6. a4!? allowed Black the opportunity to play the "obvious" (maybe oblivious?) but wrong 6...Be7?? (allowing the surprise Queen trap combo after 6. Be7?? 7. Bxf7+!).
Jan-08-10  Samagonka: Very unusual Queen chase. Should have known this would be too easy for a weekend but I'm sure that I'm not the only one who was looking for a check mate combination instead...
Jan-08-10  goodevans: <goodevans: <ZZer: I thought the answer was 7.Ne6 fxe6 8.Bxh6 gxh6 9.Qh5+ Kf8 10.Bxe6 Qe8 11.Qxh6#. Why not?>

... after <7 Ne6 fxe6 8 Bxh6> black has both 8 ... d5 and 8 ... Nb6 at his disposal.>

Black also has 8 ... Bf6, e.g. <8 ... Bf6 9 Bxe6 exd4> when things are far from clear.

Jan-08-10  Eduardo Leon: We stared at the position for half a minute. Yes, the ♙a4 is there and not at a5. "Dang, if the pawn were at a5, 7.♗xf7+ would win the queen immediately." Huh. Who said we couldn't win the queen?

7.♗xf7+! ♘xf7 8.♘e6

"Duh. Can't the queen escape to either a5 or b6?" Let us analyze both cases.

8...♕b6 9.a5 ♕b4+ 10.c3 ♕c4 11.♘c7+ ♔d8 12.b3

8...♕a5+ 9.♗d2 ♕b6 10.a5 ♕xb2 11.♗c3

In both lines, after white's ninth move, all black moves are replied until white finally traps the queen.

Premium Chessgames Member
  Once: <stacase> Good point! Chess is unusual in that it is an entirely open game. There are no hidden elements (such as the hole cards in poker) or random elements (such as the dice rolls in backgammon). So from that point of view, there is no luck in chess. Your destiny is completely open and at the mercy of 64 squares and sixteen lumps of wood (or more likely plastic made in China).

If two omniscient beings sat down to play chess, they would quickly get bored because there is no way to win without the introduction of human frailty.

Fortunately, we are weak and frail creatures and that does bring in the element of luck. For example, I know that I am stronger in some of my openings than in others. I have a healthy plus score as white against the sicilian and french, but I struggle against the caro-kann. If you didn't know that about me, it would be just luck whether you chose to meet my 1. e4 with 1...c5 or 1...c6.

It's the same with solving puzzles. Your ability to solve them will depend on your memory and on your personal preferences. If you play a lot of sicilians as black you will probably be good at spotting exchange sacrifices on c3. 1. e4 players probably get more experience with f7 sacrifices and so on.

I once played an elderly gent who specialised in isolated queen pawns (IQP) positions. So he geared his openings around the IQP - either defending it or attacking it. In some instances he would choose an inferior variation as long as that got him into his beloved IQP situation.

His success depending in part on luck. If he was lucky his opponent would be less comfortable with the IQP than he was. If he was unlucky, he would come up against another IQP specialist and then he would suffer because of the inferior position he had allowed.

You could argue that he was making his own luck, by engineering a position where he was more comfortable than his opponent. Mind you, there is a drawback to his approach. It is fine the first time that he plays someone as it comes as something of a surprise. But the second time you are prepared!

Jan-08-10  butilikefur: <7. Ne6 fxe6> 7...Qb6 (7...Qa5+ 8. Bd2 Qb6 9. a5 Qxb2 10. Bc3 traps queen) 8. Nxg7+ Kd8 9. Bxh6 Qb4+ 10. Nd2

<8. Bxh6 d5> 8...gxh6 9. Qh5+ Kf8 10. Bxe6 and mate in 1

<9. Bxg7 Qa5+ 10. b4> 10. Nc3 Rg8

<10...Qxb4+ 11. c3 Qxc4 12. Bxh8>

Jan-08-10  karnak64: Very clever.
Jan-08-10  butilikefur: that was a cute game.
Jan-08-10  antharis: Hmm, let me guess:

7. Bxf7+ Nxf7
8. Ne6 Qb6 (Qb5 or Qa6 will be followed by Nc7+)
9. a5! Qb4+
10. c3 Qc4 (threatening the Knight)
11. Nc7+ Kd8
12. b3! winning the Queen.

Am I right? ^^ Found it after about 1,3 seconds. LOL. Just kidding. I knew this opening trap in the Philidor well, because just about a month ago I bought a book (Karsten Müller: 222 Eröffnungsfallen nach 1.e4 - English: 222 Opening Traps after 1.e4) where this trap is embraced. There it is called the "Leonhardt-Trap".

Premium Chessgames Member
  ajk68: Rats! I looked as far 9. a5 but didn't see it going anywhere. I was overlooking that a6 and b5 are uninhabitable.
Jan-08-10  WhiteRook48: I'm like 7 Bxf7+ you call this difficult?
totally forgot that the pawn was already on c6
Jan-08-10  ILikeFruits: oh shnap...
whos yor...
whos yor...
i aint...
yor daddy...
really i...
am not...
Jan-08-10  ruzon: <David2009: You are white, drag and drop the move you want to make. Good luck! Harder than it looks.>

The software won't let me castle! How do you do it?

Jan-08-10  cyclon: There is another mistake in my earlier comment in sub-line; 8. -Qb6 9.a5 Qb4+ 10.Bd2 [c3] Qc4. where I mentioned 11.Nxg7+??, claiming that Queen escapes to -a6/-b5. It doesn`t. 11. -Kf8 ( -Kd8 12.b3) 12.b3 Qa6/b5 13.Ne6+ Kg8 ( -Ke8 14.Nc7+) 14.Nc7 (Qg4+ not analyzed) is EQUALLY good.
Jan-08-10  SamAtoms1980: I found the right play ---- at the wrong time, one move too soon.

It looked like 7 Ne6 was winning because after 7 ... fxe6 8 Bxh6 gxh6 9 Qh5+ Kf8 10 Bxe6 is a forced mate. But this is only a decoy: instead of plunging to his doom with 8 ... gxh6??, 8 ... Qb6! is -0.54/17.

The solution to so many Monday puzzles, Bxf7+!, turns out to work, because of the hidden, quiet killers 9 a5! and 12 b3!

"As a result of this line of play, you win a queen for a bishop and knight." ---- <Chessmaster 3000>

Jan-08-10  Eduardo Leon: <antharis>:

First, neither 8...♕b5 nor 8...♕a6 are actual possibilities.

Second, 8...♕a5 was an actual possibility. And you had to analyze it.

Jan-08-10  turbo231: Once again this puzzle doesn't work against Rybka. Rybka moves to a5+! Set the game at 20 moves in 25 minutes and try to beat Rybka. You can't trap rybka's Queen, she moves the bishop to d8! Maybe some one can beat rybka using line given. I saw the same line but I knew rybka would move to a5+ and she did. And by moving to bd8 the white knight is null and void. You can do nxg7+, then what?
Jan-08-10  patzer2: Here's some analysis verified with Fritz 10:

<1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Ng5 Nh6 6. a4 Be7??>

This move at a glance may at first look "obvious," but it's actually the losing blunder. Instead, Black should play 6... exd4 =.

<7. Bxf7+ Nxf7 8. Ne6 Qb6>

If 8... Qa5+, then White wins after 9. Bd2 Qb6 10. a5 Qxb2 11. Bc3 Qxa1 12. Bxa1 .

<9. a5>

This wins, but also decisive is 9. Nxg7+ Kf8 10. Ne6+ Kg8 11. Qg4+ when play might continue 11...Bg5 12. Bxg5 h5 13. Qg3 Nxg5 14. Qxg5+ Kf7 15. O-O Kxe6 16. Qg6+ Nf6 17. d5+ cxd5 18. exd5+ Kxd5 19. Qxf6 Qd8 20. Qf7+ Be6 21. Qxb7+ Kc5 22. b4+ Kd4 23. Rd1+ Kc4 24. Qe4#.

<9...Qb4+ 10. c3>

This is strongest and is clearly decisive, but also winning is 10. Bd2 Qxb2 11. Bc3 Qxa1 12. Bxa1 .

<10... Qc4 11. Nc7+ Kd8 12.
b3 1-0>

With his Queen trapped and his position hopeless, Black resigns.

Jan-08-10  turbo231: Fritz 10 is right the black Queen is trapped and it's hopeless.
Jan-08-10  johnlspouge: Friday (Difficult)

Krogius vs N Aratovsky, 1945 (7.?)

White to play and win.

Material: Even. The Black Ke8 has 1 legal move. The White Bc4 and Ng5 both attack f7, while the Black Nh6 defends f7. The White Qd1, Bc1, and Ra1 can all join an attack rapidly, so White should open the position. The Black Qd8 has 2 flight squares. Black can solve most of his difficulties with 7…O-O, and 7…d5 can interfere with the powerful Bc4, indicating a forcing candidate. The White Ke1 is secured from check, except for …Qa5+.

Candidates (7.): Bxf7+, Nxf7, Ne6, Qh5

7.Bxf7+ Nxf7 [Kf8 Ne6+ wins Qd8]

8.Ne6 (threatening 9.Nxd8)

(1) 8…Qb6 9.a5 Qb4+ [Qb5 or Qa6 10.Nc7+ wins the Black Q]

10.Bd2 Qc4 [Qxb2 11.Bc3 Qb5 12.Nc7+ wins Qb5]

11.Nc7+ K any 12.Nxa8

White has R+P for B, with the Black K in the center. The White Na8 is not in immediate danger, so the position favors White.

(2) 8…Qa5+ 9.Bd2 Qb6 10.a5 Qxb2 11.Bc3

White has trapped the Black Qb2.

Toga verifies Variation (1) as winning, at about +3.8 P.

Premium Chessgames Member
  FSR: 6.a4!? was a diabolical trap.
Jul-17-22  vonKrolock: Trap attributed to the divine Philidor himself. 6...Be7 is very bad. Some ways to avoid the pitfall are known, starting with the Aron-Treatment P S Leonhardt vs Nimzowitsch, 1911
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