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Ragnar Krogius vs Antti G Ojanen
"Ragnar Rock" (game of the day Nov-27-2011)
Helsinki (1944), Helsinki FIN
Sicilian Defense: Morphy Gambit. Andreaschek Gambit (B21)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Feb-21-17  Autoreparaturwerkbau: I must be blind but what happens in game line after <11...Kxe4> (king taking pawn)?
Feb-21-17  cocker: Seems to have been a sudden increase in difficulty this week. Means the rest of the week will be beyond me.
Feb-21-17
Premium Chessgames Member
  thegoodanarchist: <FSR: What the heck is Ragnar Rock?>

Ragnar÷k is a battle at the end of the world, in Norse mythology, IIRC.

Feb-21-17
Premium Chessgames Member
  moronovich: <Autoreparaturwerkbau: I must be blind but what happens in game line after <11...Kxe4> (king taking pawn)?>

0-0-0,followed by RHe1+ mating.The BKing is "in a box".A mating net.

Feb-21-17  morfishine: By move <6> White has 3 minors developed while Black has zero

Of course we can sacrifice on <f7>

*****

Feb-21-17  schachfuchs: To make things short, I was going for 9.Ng6+ after Ke7.

Anyway, I think this puzzle is more Tuesday adequate than it was yesterday's Monday ;-)

Feb-21-17  tatarch: <moronovich: <Autoreparaturwerkbau: I must be blind but what happens in game line after <11...Kxe4> (king taking pawn)?>

0-0-0,followed by RHe1+ mating.The BKing is "in a box".A mating net.>

Maybe 12.Nc3+ first, since white queen is hanging? Not sure on quickest mate but black looks pretty boxed in.

Feb-21-17
Premium Chessgames Member
  steinitzfan: I was at first attracted to 12 O-O-O+. I think 12 Rd1+ is actually clearer though. Keeping the c1 square open for the rook can be valuable. The game line is fine though. There are probably other ways to win as well.
Feb-21-17
Premium Chessgames Member
  agb2002: White is one pawn down.

The first idea that comes to mind is 7.Nxe5 dxe5 8.Bxf7+ Ke7 (8... Kxf7 9.Qxd8 + -) but it's not clear how to continue.

Reversing the move order yields 7.Bxf7+ Kxf7 (else Qb3 with identical material but an overwhelming position) 8.Nxe5+:

A) 8... Ke8 9.Qh5+ and mate in two.

B) 8... Ke7

B.1) 9.Ng6+ followed by Nxh8 looks winning.

B.2) 9.Nd5+ Ke6 (9... Ke8 10.Qh5+ as in A) 10.Qg4+ Kxe5 11.Bf4+

B.2.a) 11... Kd4 12.Be3+ Kd3 (12... Kc4 13.Qe2#; 12... Ke5 13.Qf4+ Ke6 14.Qf5#) 13.Rf1+ Kc2(4) 14.Qe2#.

B.2.b) 11... Kxe4 12.Nc3+ Kd4 (12... Kd3 13.Qe2+ Kd4 14.Rd1+ Kc5 15.Qb5#) 13.Be3+ Ke5 (13... Kd3 14.Qe2#) 14.Bd4#.

C) 8... Ke6 9.Qd5+ Kf6 (9... Ke7 10.Qf7#) 10.Qf7+ Kxe5 11.Bf4+ Kd4 12.Qd5#.

D) 8... Kf6 9.Qd4 (threatens Nc6+)

D.1) 9... dxe5 10.Qxd8 + - [Q+P vs B+N].

D.2) 9... Nc6 10.Nxc6+ wins.

D.3) 9... Qa5 10.Nc6+ wins.

D.3) 9... Qb6 10.Nd7+ wins.

D.4) 9... Qc7 10.Nd5+ wins.

D.5) 9... Qe8 10.Nd5+ Ke6 11.Nc7+ Ke7 12.Nxe8 wins decisive material (12... dxe5 13.Qxe5+ Be6 14.Nxg7).

D.6) 9... Ke6 10.Qd5+ as in C.

D.7) 9... Ke7 10.Ng6+ as in B.

E) 8... dxe5 9.Qxd8 + - [Q+P vs B+N].

Feb-21-17  Carlos0012358: This puzzle is less about the solution and more about how black got himself in that shape after only 7 moves. Neither do these two were pre-war wizards, but Antti must have had a rough night before this game.
Feb-21-17  zb2cr: I saw the first two moves, but got hung up on White response to 8. ... Kf6. Not enough time this morning, so I gave up.
Feb-21-17  belgradegambit: Not a Tuesday level problem.
Feb-21-17  Pedro.Akcio: I saw Bxf7, but I went for Nxe5 first...only to realize that Qxd8+ is a blunder, and the line with Bxf7 is not as effective after the sacrifice even though white still has compensation
Feb-21-17  The Kings Domain: Neat puzzle and a memorable game.
Feb-21-17
Premium Chessgames Member
  catlover: <belgradegambit: Not a Tuesday level problem.>

Yeah, I thought maybe I overslept and woke up on Friday.

Feb-21-17
Premium Chessgames Member
  whiteshark: Boom Bang.... ♫♪
Feb-21-17  drollere: <I must be blind but what happens in game line after <11...Kxe4> (king taking pawn)?>

something at least as bad as 12. Bg5+ winning the Q at leisure.

Feb-21-17
Premium Chessgames Member
  keypusher: < drollere: <I must be blind but what happens in game line after <11...Kxe4> (king taking pawn)?> something at least as bad as 12. Bg5+ winning the Q at leisure.>

12.Nc3+ mates in a few moves.

Feb-21-17  drollere: <belgradegambit: Not a Tuesday level problem.>

Bxf7+ followed by a N check and a Q attack is a pretty standard family of trappy opening hazards for black in a traditional Kp opening. often the N check is at g5 but either way the KN moves to the 5th rank to open the white diagonal for the Q.

you can't predict what happens after the N check because it all depends on black's answer. so i'd assume the "easy" aspect of the puzzle was to see Bf7+ as the obvious move in this position.

Feb-21-17
Premium Chessgames Member
  kevin86: Black pieces never left the back row.
Feb-21-17  beenthere240: Black must have felt proud about 3...e5 ("Ohhhh I hope he takes it!"
Feb-21-17  Sularus: the old Bxf7+ trick
Mar-02-17
Premium Chessgames Member
  PhilFeeley: <cocker: Seems to have been a sudden increase in difficulty this week. Means the rest of the week will be beyond me.> Maybe he's just run out of easy ones. I've been on this site for 5 years now and with posting 52 to 104 easy ones a year, he was bound to run out of them sometime. After all, aren't most of the games here supposed to be by people who know how to play the game?
Dec-14-17  SoDark: Even if black brings out knight to defend, 3...Nc6 4. Nxd4 e5 5. c3 exd4 6. cxd4 d6 7. Nc3

Full central dominance and development for the exchange.

Dec-14-17  SoDark: From there

3...Nc6 4. Nxd4 e5 5. c3 exd4 6. cxd4 h6 7. Nc3 Bb4 8. Bc4 Nf6 9. a3 Ba5 10. f3 O-O 11. O-O

White has a beautiful pawn structure, and spacial advantage. In blitz one may calculate till if Nxd4, Black cannot NxNd4 as QxD4 and eventually play the pawn forward.

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