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Kenneth S Rogoff vs Steve Spencer
US Jnr Chp (1969), McAlpin Hotel, New York, NY USA
Caro-Kann Defense: Gurgenidze System (B15)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 3 times; par: 36 [what's this?]

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Kibitzer's Corner
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Dec-02-13  MarkFinan: Sorry, 19..Ne8??
Feb-07-14
Premium Chessgames Member
  YouRang: Apparently, this game was annotated by Bobby Fischer:

http://chessforallages.blogspot.com...

Apr-14-15  Howard: I recall Fischer's going over this game in Boys Life...it was the first time I'd ever heard of Rogoff.

There was a place where Rogoff makes an impressive move, and Fischer writes, "White explodes his combination."

Oct-02-15  Abdooss: Chessgame.com shows Fischer's analysis of this game here --- < http://en.chessbase.com/post/did-yo... >
Dec-30-16
Premium Chessgames Member
  Gregor Samsa Mendel: I thought I got this one, but then I remembered that my wife got me a book compilation of Fischer's Boys Life columns as a Christmas present, and I had just read his annotations on this game.
Dec-30-16  johngalt5579: I might start with 18 Nf7 and if Kf7 then 19Re6 poses multiple threats.
Dec-30-16
Premium Chessgames Member
  wtpy: 17..Nd5 looks like it holds though white has a little plus with be7 perhaps keeping the bishop on the a3 f8 diagonal.
Dec-30-16  backyard pawn: After 19..., Ne8, White misses mate in 2.
Dec-30-16  TheBish: I got it, but also missed the quicker mate in 2! I think it has everything to do with analyzing Rxf6+ when the knight is still on f6, and so it's easy enough to see the mate in 4 after 19...Ne8 20. Rf6+, and once you see that, there are no bonus points (in a real game anyway) for pausing to find the quicker mate. I use a tactics program that would severely penalize you for missing the quicker mate! It's quite annoying, because you can find 4 brilliant moves in a row but miss solving the problem (and lose big points) for not finding the BEST move to finish the combination, even though the 2nd best move is still easily winning.

I thought this was pretty easy for a Friday, didn't have to spend much time at all on it.

Dec-30-16
Premium Chessgames Member
  agb2002: The material is identical.

White can expose the black king with 18.Nxf7 Kf7 (otherwise Black loses the e-pawn also without compensation) 19.Rxe6:

A) 19... Kf8 20.Bxf6 + - [2P].

B) 19... Kg8 20.Re8#.

C) 19... h6 20.Rxf6+ Ke8 (20... Ke7 21.Rf7+ Kd6 -21... Ke8 22.Re1+ Be5 23.Rxe5#- 22.Bf4+ Be5 23.Bxe5#) 21.Re1+ Kd8 (21... Kd7 22.Rf7+ Kd6 23.Re6#) 22.Rxg6+ hxg5 23.Rxg7 + - [3P].

D) 19... Nd5 20.Rxc6

D.1) 20... Rxc6 21.Bxd5+ Re6 22.Bxa8 + - [3P].

D.2) 20... Rd8 21.Rc5 Ke6 (21... Bb7 22.Rc7+ Kf8 -the knight is pinned- 23.Rxb7 + - [B+3P vs N]) 22.Re1+ wins. For example, 22... Kf5 23.Bxd5 Rac8 24.Be6#.

D.3) 20... Bb7 21.Bxd5+ Kf8 22.Rd6 Bxd5 (22... Rd8 23.Rxd8+ Rxd8 24.Bxb7 + - [B+3P]) 23.Rxd5 + - [3P].

E) 19... Nh5 20.Rf6+ Ke7(8) 21.Re1+ Kd8 (21... Kd7 22.Rf7+ Kd6 23.Re6#) 22.Rf7+ Bf6 (22... Nf6 23.Rxg7 wins) 23.Bxf6+ Nxf6 24.Rxf6 + - [2P].

F) 19... Ne8 20.Rf6+ Ke7 21.Rf7+ Kd6 22.Bf4+ Be5 23.Bxe5#.

Dec-30-16  leRevenant: I think the days of the week have been mixed up.
Dec-30-16
Premium Chessgames Member
  cocker: I agree with <leRevenant>. There has been no graduation in difficulty this week.
Dec-30-16
Premium Chessgames Member
  morfishine: Standard sac on <f7>
Dec-30-16  stacase: All of White's pieces are positioned just right. How come that never happens in my games? I suppose it does, I just never see it (-:
Dec-30-16
Premium Chessgames Member
  ChessHigherCat: <stacase: All of White's pieces are positioned just right. How come that never happens in my games?>

Bobby answers from beyond the grave:
12. Ng5 Notice [stacase], how Ken slowly builds up his position. Before he takes any decisive action, he moves all his pieces out to their most active posts http://en.chessbase.com/post/did-yo...

Dec-30-16  mel gibson: It's not a quick mate.
The computer DR4 64 bit - agrees with move 18 but says:

18. Nxf7 (18. Nxf7 (♘e5xf7
♘f6-d5 ♖e1xe6 a5-a4 ♗b3-a2 ♔g8xf7 ♖e6xc6 ♖c8xc6 ♗a2xd5+ ♖c6-e6 ♗d5xa8 ♗g7-f6 ♗g5-e3 ♖e6-e7 ♖a1-e1 ♗a6-c8 ♔g1-h2 ♗c8-b7 ♗a8xb7 ♖e7xb7 ♔h2-g3 ♖b7-e7 ♔g3-f3 ♖e7-e8 d4-d5 ♖e8-d8 ♖e1-d1 ♖d8-e8 ♔f3-f4) +3.32/20 114)

score +3.32 depth 20

Dec-30-16  The Kings Domain: Tough, deep puzzle and great game.
Dec-30-16
Premium Chessgames Member
  varishnakov: First thing that suggests itself is a knight sac at f7. And the natural move is a recapture of the pawn with the rook, and the threat of a discovered check. But black has a defensive move that seems to hold the position.

18.NxKBP KxN 19.RxP N-Q4 blocking the bishop's attack

20.RxBP removing the defender ----

20...RxR 21.BxN+ wins back a rook --21...R-K3 22.BxR

Dec-30-16
Premium Chessgames Member
  YouRang: Friday 18.?


click for larger view

I spotted pretty quickly that white's LSB and Re1 both converge on Pe6, which is supported only by Pf7, which in turn is supported only by black's king. Furthermore, my Ne5 is blocking my rook and attacking that Pf7. Naturally, the move that jumps out is <18.Nxf7>, undermining the now doubly attacked Pe6.


click for larger view

Starting with the (unclear) assumption that black takes the knight via <18...Kxf7>, we are now in position to take Pe6. But with which piece?

My first inclination (based just on experience) that its often stronger to take with the piece that doesn't give check (the rook in this case). This opens the door for further tactics like discovered check (e.g. windmill) or double check. So, trying <19.Rxe6>:


click for larger view

And this does indeed produce some juicy threats:

- If the K remains on f7 and the N remains on f6, then Rxf6++ (double-check) wins back the piece to go with the 2 pawns, with further attack to come.

- If the 19...Kf8 (unpinning), then the Nf6 loses a defender, thus Bxf6 wins.

So black needs to consider knight moves:

- If <19...Ne5> blocking my LSB,


click for larger view

This took a moment, but white can undermine the N with <20.Rxc6! Rxc6 21.Bxe5+> winning back both the N and R (plus another pawn).

- If <19...Nd7> then Re7+ and Rxd7 next.

- If <19...Ne8> then 20.Re5+ Kf8 21.Be7#

- If <19...Ng8> This is another "thinker", but the forcing moves aren't too hard to find: <20.Re7+ Kf8 21.Rf7+ Ke8>


click for larger view

I was stuck here for a moment until I remembered that I had another rook! <22.Re1+!> with just some futile blocks until mate.

- If <19...Nh5> then 20.g4 and the N has nowhere to go.

- If <19...Ng4> (stupid) then 20.hxg4.

- If <19...Nd4> (also stupid) 20.Rxe4+.

Now, if black doesn't take the N, I don't think he actually avoids trouble because I still have Rxe6!. Guarding e6 (18...Re8) is pointless since it's double attacked. I think I should be happy.

Dec-30-16  JASAHA: There is a discrepancy in the move order compared to Fischer's analysis "That alone makes Fischer's notes worthy of study. Already after the initial moves 1.e4 g6 2.d4 Bg7, I learned something new.

Fischer: The Pirc defense, also called the 'Rubbish' or 'Rat' defense because of the cramped but fighting game it gives Black. The game continued 3.Nc3 c6 4.Nf3. Here Fischer gave a relatively detailed analysis of the alternative 4.Bc4. Why spend this effort on the fourth move? Due to Black's having avoided ...Nf6, the game has already branched off into less charted territory, which Fischer obviously thought was important. After the further 4...d5 5.h3, White's fifth is the sort of move that sometimes gets a '?'. Fischer gave it a '!'."

Dec-30-16  SpamIAm: Faster than 20.Rf6+ as in the game was 20.Re5+(or Re4/Re3/Re2/Re1)Kf8 21.Be7++. But I think everyone already realizes this, though no one has actually posted the moves.
Dec-30-16
Premium Chessgames Member
  Capacorn: <Abdooss: Chessgame.com shows Fischer's analysis of this game here --- < http://en.chessbase.com/post/did-yo... >>

Thank you for posting this link, Abdooss. I'd read about Bobby's "Boy's Life" columns, but never actually saw one myself. It was great to read Fischer's notes. He had a real knack for shedding light on the game. Such a pity he wrote so little on chess. Directly after enjoying your link, I checked to see if an English language version of Gardar Sverrisson's "Bobby Fischer's Final Years" had been printed. It has not. But as luck would have it, I stumbled upon "Checkmate: Bobby Fischer's Boys' Life Columns," which I immediately ordered. The book was only published last month, so it's rather serendipitous that I happened upon this puzzle, and your link, when I did.

Dec-30-16
Premium Chessgames Member
  Sularus: <chrisowen>
exacty.
Dec-30-16
Premium Chessgames Member
  Sularus: another example of exploiting a weak f7 square.
May-29-17  FSR: Pulling the Rogoff from Under Him.
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