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David Norwood vs Sean Marsh
"Operation Norwood" (game of the day Dec-04-2015)
Walsall Kipping Jubilee Tournament (1992), Walsall ENG, rd 1, Apr-??
Formation: King's Indian Attack (A07)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Given 24 times; par: 52 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 4 ·  Later Kibitzing>
Dec-04-15
Premium Chessgames Member
  perfidious: <FSR: Gorgeous! I'm surprised this game isn't better known. I'd never seen it before.>

Nor had I.

<tatarch: Sean Marsh- great to get your comments here, but how do you feel about being called "dumb as a sack of hammers" on this page?>

Who cares?

Dec-04-15
Premium Chessgames Member
  Domdaniel: <who cares?> Quite. It's always good to see comments from either of the players in a classic game -- remember that they were there, and we weren't -- and even the loser has thought about the game more deeply than the rest of us. Thank you, Sean Marsh.
Dec-04-15
Premium Chessgames Member
  Domdaniel: BTW, is this the same game that was called 'Marsh Mellow'?
Feb-03-17  Saniyat24: Marsh Mellow? ha ha ha...!
May-25-17  Marcelo Bruno: A very beautiful combinations that includes 2 sacrifices.
Jun-17-17
Premium Chessgames Member
  al wazir: Easy. I didn't see all the way to the mate, but there were so many pieces involved in the attack that there had to be a pony -- I mean a win -- somewhere.

It was a no-risk line anyway, since 32. Nc6+ would have recovered the ♕, and white always had the option of a perpetual if he couldn't find the mate.

Jun-17-17
Premium Chessgames Member
  An Englishman: Good Evening: My only contribution to the vast collection of maxims in chess--"Do not force your opponent to play the best moves." A maxim that, sadly, I almost never obeyed. Here, Black pretty much forced White to play the key move; the rest, rather easy to calculate.
Jun-17-17  ChessHigherCat: Queen sac Saturday. The first couple moves are obviously 28. Qxc6 Kxc6. Now the plot thickens: 29. Nxd4+ or Ne5+? The former has the advantage of keeping the DSB's diagonal open and limiting black's options but the disadvantage of playing the knight en prise.

If 29. Nd4+, the K has only 2 options: a6 or c8....

Whoops, overlooked the option Kb6, but still pretty good without a board and maybe I would have figured it out eventually.

Jun-17-17  Walter Glattke: Good morning, mate only with Nxd4,
neither 29.Ng5+ nor 28.Nxc6 fxe4 29.Bxe4+ get mate, only black advantage both.
Jun-17-17  yadasampati: @al wazir <Easy. I didn't see all the way to the mate, but there were so many pieces involved in the attack that there had to be a pony -- I mean a win -- somewhere. >

I think you can not say it is "easy" when you do not see the mate in the end. White is down quite some pieces in the end and if the black king manages to find a safe field for a moment, then black simply takes over the initiative

Jun-17-17  mel gibson: Yes - the computer confirms - mate in 8.
This was fantastic - it's all forced.

28. Qxc6+ (28. Qxc6+ (♕e4xc6+ ♔b7xc6 ♘f3xd4+ ♔c6-b6 ♖e1-b1+ ♔b6-a5 ♗f4-d2+ ♔a5-a4 ♗g2-c6+ ♔a4xa3 ♗d2-c1+ ♔a3-a2 ♖b1-b2+ ♔a2-a3 ♘d4-c2+) +M8/16 4)

Jun-17-17  AlicesKnight: I saw the main break-in (for once on a Saturday) with Qxc6+, Nxd4+, Rb1+ and Bb7+, and figured that there was a R-file mating-net there somewhere. Beautifully played by Norwood.
Jun-17-17
Premium Chessgames Member
  radtop: The only thing more amazing than the game was me solving it. It's easier to solve a puzzle when you know it has a solution.
Jun-17-17  morfishine: Saw a game that was very similar if not identical that featured the Black King walking the plank down the a-file. This aided me greatly in seeing this solution to the end. But I can't claim real credit since the possibility exists the game I previously saw was none other than this one here. Don't know for sure

*****

Jun-17-17  bla bla: very nice combination
Jun-17-17  bla bla: A8: pgn4web v2.82 debug info B8: show this position FEN string C8: show this game PGN source data D8: show full PGN source data E8: open/update analysis board F8: close/pause analysis board G8: shortcut squares help H8: pgn4web help A7: pgn4web website B7: undo last chessboard position update C7: redo last undo D7: toggle highlight last move E7: flip board F7: toggle show comments in game text G7: toggle autoplay next game H7: toggle enabling shortcut keys A6 B6 C6: search previous finished game D6: search previous unfinished game E6: search next unfinished game F6: search next finished game G6 H6 A5: repeat last search backward B5: search prompt C5: repeat last search D5: search previous win result E5: search next win result F5 G5 H5 A4: search previous event B4: search previous round of same event C4: search previous game of same black player D4: search previous game of same white player E4: search next game of same white player F4: search next game of same black player G4: search next round of same event H4: search next event A3: load first game B3: jump to previous games decile C3: load previous game D3: load random game E3: load random game at random position F3: load next game G3: jump to next games decile H3: load last game A2: stop autoplay B2: toggle autoplay C2: autoplay 1 second D2: autoplay 2 seconds E2: autoplay 5 seconds F2: autoplay custom delay G2: replay up to 6 previous half-moves, then autoplay forward H2: replay the previous half-move, then autoplay forward A1: go to game start B1: move 10 half-moves backward C1: move 6 half-moves backward D1: move backward E1: move forward F1: move 6 half-moves forward G1: move 10 half-moves forward H1: go to game end
Jun-17-17  bla bla: is it good
Jun-17-17  stacase: <radtop: ...It's easier to solve a puzzle when you know it has a solution.>

That was my thought as I was going move for move banging this one out.

Jun-17-17  agb2002: White has the bishop pair for a rook and a knight.

Black threatens fxe4.

White can start a mate attack with 28.Qxc6+ Kxc6 29.Nxd4+ Kb6 30.Rb1+:

A) 30... Ka6 31.Bb7+ Ka5 32.Bd2+ Ka4 33.Bc6+ Kxa3 34.Nb5+

A.1) 34... Ka2 35.Nc3+ Ka3 36.Bc1#.

A.2) 34... Ka4 35.Nc3+ Ka5 36.Rb5+ Ka6 37.Bb7#.

B) 30... Ka5 31.Bd2+ Ka4 (31... Ka6 32.Bb7#) 32.Bc6+ transposes to A.

Jun-17-17  Eusebius: Black's short initiative ends with with the uninspired 20...Bf8. After that White unleash his combination like an orginized firework.
Jun-17-17  gofer: I am sorry, but this is so far from <Very Difficult>. This is more like a Tuesday or Wednesday level POTD. Our queen is trapped and there are only two or three meaningful replies. Only one of these treatens mate...

<28 Qxc6+ Kxc6>

<29 Nxd4++ Kb6>

<30 Rb1+ ...>


click for larger view

Okay, so we have forced the king the a file and have three minor pieces to complete the mate while Rb1 keeps the king on A file. This is still not very difficult. Both replies for black transpose, so we only have one variation to follow;

30 ... Ka5
31 Bd2+ Ka4 (Ka6 Bb7#)
32 Bc6+ Kxa3

<30 ... Ka6>
<31 Bb7+ Ka5>
<32 Bd2+ Ka4>
<33 Bc6+ Kxa3>


click for larger view

At this point White found a quicker kill than me, but I found a very pretty one with the white knight doing all the work!

<34 Nb5+ Ka4> (Ka2 35 Nc3+ Ka3 36 Bc1#)

<35 Nc3+ Ka5> (Ka3 36 Bc1#)

<36 Nd5+ Ka6>

<37 Nc7#>


click for larger view

Far too easy for a <Saturday>!

Jun-17-17  malt: 28.Q:c6+ K:c6 (no alternative) 29.N:d4+ Kb6 30.Rb1+ Ka6 31.Bb7+ Ka5 32.Bd2+ Ka4 (come into my parlour)33.Bc6+ K:a3 34.Bc1+ Ka2 35.Rb2+ ...Ka3/..Ka1 36.Nc2#
Jun-17-17  mel gibson: This is textbook chess.
The 2 Bishops become extra powerful when working together on diagonals - just like 2 Rooks working on ranks or files. They can move the King down the board.

This is beautiful chess -
& is why I am always sorry to see a bishop swapped for a knight early in a game - we don't get to see this often.

Jun-17-17  clement41: The light square edge white has since Rxb7 is obvious, as is the discovery. The direction clearly is, then, Qxc6+ but these considerations need to be validated by calculation (till mate, else white is losing) Qxc6+ Kxc6 Nxd4+ Kb6 Rb1+ Ka5 (...Ka6 Bb7+ delays one move) Bd2+ Ka4 Bc6+ Kxa3 Bc1+ (Nb5+ mates too while Nc2+?? loses) Ka2 Rb2+ and Nc2# next move
Jun-17-17  bubuli55: Very difficult is 26.Rb7
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