chessgames.com
Members · Prefs · Laboratory · Collections · Openings · Endgames · Sacrifices · History · Search Kibitzing · Kibitzer's Café · Chessforums · Tournament Index · Players · Kibitzing

(If you register a free account you won't see all these ads!)
Nikolai Krogius vs Vlastimil Jansa
Chigorin Memorial (1965), Sochi RUS, rd 10, Sep-??
King's Indian Defense: Normal. King's Knight Variation (E60)  ·  1-0
ANALYSIS [x]

FEN COPIED

explore this opening
find similar games 2 more Krogius/Jansa games
sac: 34.Rd8+ PGN: download | view | print Help: general | java-troubleshooting

TIP: As you play through the game, you can get the FEN code for any position by right-clicking on the board and choosing "Copy Position (EPD)". Copy and paste the FEN into a post to display a diagram.

PGN Viewer:  What is this?
For help with this chess viewer, please see the Olga Chess Viewer Quickstart Guide.
PREMIUM MEMBERS CAN REQUEST COMPUTER ANALYSIS [more info]

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-09-07  notyetagm: Very nice tactical promotion by Krogius, winning ♗ for ♙. So far, so good this week.
Jan-09-07  notyetagm: <NBZ: ... The key idea is white gets to play Be5 after black plays Bc7 so the b-pawn promotes. If 35. ... f6 36. Bxb2 Bc7 37. Bxf6 and Be5 next.>

Yes, the key idea to solving this puzzle is that White cannot be stopped from eventually playing ♗e5, gaining control of the b8-promotion square and forcing the promotion of the passed White b7-pawn.

As Reinfeld once wrote, in regards to this ♗e5, b7-b8=♕ idea, <Notice the immediate decisive effect of gaining control of the promotion square>.

Jan-09-07  Fisheremon: <notyetagm: Very nice tactical promotion by Krogius, winning B for P. So far, so good this week.> I would play 33.a3 (instead of 33.b7) with a nice win.
Jan-09-07  Ashram64: yea.. got to love tuesday as it made you feel like a working some grandmaster magic.

White's sequence 34.Rd8+ Bxd8, following 35.Bc3+ Kg8 36. Bxb2 Bc7 37.Be5 promotion can't be stopped.

34. Rd8+ kg7 35. b8=Q Rxb8 36. Rxb8 down a rook

Jan-09-07  Selangor: My intuition got me right here ...just before checking with the solution as explained by Ashram64...
Jan-09-07  notyetagm: <Ashram64: ... 34. Rd8+ kg7 35. b8=Q Rxb8 36. Rxb8 down a rook>

Yes, 34 ♖d8+! gains control of the loose b8-promotion square with tempo.

Jan-09-07  micartouse: I messed up. I found Bc3 and Rd8+ both fairly quickly but then chose the wrong one.

I missed the final Be5 stroke. :(

Jan-09-07
Premium Chessgames Member
  YouRang: Well, 34. Rd8+ was the first move I looked at. Unfortunately, my first round of looking is rather shallow, so I dismissed it after seeing 34...Bxd8

It was maybe the 2nd or 3rd time that I looked at 34. Rd8 that I noticed the pretty bishop fork that not only wins the rook back, but puts the bishop in position to guard the b8 promotion square. This lets me win a bishop for a pawn with an easy endgame.

Jan-09-07
Premium Chessgames Member
  kevin86: I was at two minds for this one-and missed the final touch!

34 ♖d8+ ♗xd8 35 ♗c3+ ♔g8 36 ♗xb2 ♗c7 37 ♗e5 forcing the pawn through by clearing the line of the bishop

Jan-09-07  Themofro: I got it without to much trouble. Obviuosly white wants to promote so my first glance was Rd8+ but after i saw bishop takes but it on the backburner and looked for alternatives, but didn't see anything else. So i realized that Rd8+ must be the move, as such find a way to make it work, and lo and behold! there it is, i jut didn't look far enough the first time, even though it wasn't hard, lol, a nice game.
Jan-09-07  TrueBlue: put me in the bc3 crowd. It's a cool move, but you need your calculator to figure out if it works.
Jan-09-07  haha: Nice.
Jan-09-07  simsan: I am happy with this one. I got it all the way to seeing that Be5 would win material.

Initially, however, I had a different idea which I guess was interesting enough to share.

I considered attacking the black bishop with Rd6, since I believed it would either have to leave the long diagonal (enabling Bc3+) or open d8 for Rd8+ (with pawn promotion). My "cunning" mind had a feeling that even after 34. .. Kg7+ I could still play 35. Rxf6??

The idea was:
35. ... Kxf6 36.Bc3+! K[any] 37. Bxb2
or maybe
35. ... Rxd2 36.Rxf7+ KxR 37. b8Q
The problem was the zwischenzug...
35. ... Rb1+! leaving me down the exchange and soon without my advanced pawn (in other words: lost).

So I had to start from scratch and (possibly due to my prior evaluations) I rather quickly saw the correct sequence of moves.

Jan-09-07  alphee: Once 34.b8=♕ is eliminated the solution comes easily BUT back can play 34... ♔g7 35. b8=♕ ♗d4+ 36. ♖xd4 ♖xb8 37. ♗c3 ♔g6 38. ♖xa4 f6 39. ♖a6 ♖f8 40. ♖e6 h5 .... in which case white may still have to "fight" a bit. It does not seems anybody mentioned it ...
Jan-09-07  alphee: <simsan> sorry, I didn't see your posting!
Jan-09-07  unsound: <alphee> Eh? In your line, why does white have to play 36.Rxd4? Just play 36.Kf1, and you stay a rook ahead, and don't have to fight.
Jan-09-07  Fisheremon: <unsound: <alphee> Eh? In your line, why does white have to play 36.Rxd4? Just play 36.Kf1, and you stay a rook ahead, and don't have to fight.> Right, but as I noted before playing 33.a3 White could have a similar thing (=a nicer win).
Jan-09-07  Fisheremon: <simsan><alphee><unsound> Quite interesting that 34.Rd6 (as well as Rd7) wins too: 34...Kg7 35.Rd7 Kf8 36.Rc7 Bd4+ 37.Kf1 Kg7 38.Rd7 Bf6 39.Be3
Jan-09-07  Cannon Fodder: I totally missed this one by choosing Bc3. The mistake consisted of a) not seeing that black has a check and b) not calculating far enough to see that the f4 pawn will protect the bishop when black attacks the promotion square. Oh well, at least I got yesterday's puzzle.
Jan-09-07  Trouble: nice problem, solved it instantly
Jan-09-07  unsound: <Fisheremon> 33.a3 with the idea 33...Rb2, 34.Bb4, right? Took me a little while to see your point.
Jan-09-07  simsan: <Fishermon> Yes the computer gives both Rd6 and Rd7 pretty good evalutations in addition to Rd8+. But Rd8+ is of course clearly better from all perspectives.

better eval, forced lines, simplification, easily won endgame

After Be5 Bb6+ 38. Kg2 Ba7 39. b8Q/R+ Bxb8 40.Bxb8 the position would call for a resignation even in blitz games at my level of play.

Jan-09-07  greensfield: Went along 34. Rd7 route, so missed the nice 34. Rd8+ with the Bishop fork etc.
Jan-09-07  GannonKnight: One of the easier Tuesday puzzles.
Jan-10-07  Fisheremon: <unsound: <Fisheremon> 33.a3 with the idea 33...Rb2, 34.Bb4, right? Took me a little while to see your point.> 33.a3 is a typically silent move (you could also discover 28...e4 was a positional mistake leading to the lost position). Black has to be forced with 33...Rc6, or Rc8 leading to immediate loss of big material.
search thread:   
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
NOTE: You need to pick a username and password to post a reply. Getting your account takes less than a minute, totally anonymous, and 100% free--plus, it entitles you to features otherwise unavailable. Pick your username now and join the chessgames community!
If you already have an account, you should login now.
Please observe our posting guidelines:
  1. No obscene, racist, sexist, or profane language.
  2. No spamming, advertising, or duplicating posts.
  3. No personal attacks against other members.
  4. Nothing in violation of United States law.
  5. No posting personal information of members.
Blow the Whistle See something that violates our rules? Blow the whistle and inform an administrator.


NOTE: Keep all discussion on the topic of this page. This forum is for this specific game and nothing else. If you want to discuss chess in general, or this site, you might try the Kibitzer's Café.
Messages posted by Chessgames members do not necessarily represent the views of Chessgames.com, its employees, or sponsors.
Spot an error? Please submit a correction slip and help us eliminate database mistakes!
This game is type: CLASSICAL (Disagree? Please submit a correction slip.)

Featured in the Following Game Collections [what is this?]
34 Rd8+! gains control of loose b8-promotion square with tempo
from FORCING MOVES are MOVE-YOUR-PIECE-FOR-FREE card by notyetagm
34 Rd8+! Black f6-bishop breaks alignment of b2-rook, h8-king
from Breaking an alignment is a full-time job by notyetagm
34.? (Tuesday, January 9)
from Puzzle of the Day 2007 by Phony Benoni
peón a dama
from martes puzzles by artnova
34 .- ?
from Weekend Puzzles by mgracian
KI/ENG
from Wookash's games to check by Wookash
puzzle 9/1/2007 white to play 34.?
from puzzles from 27/11/2006 by vuchamchi
34.? - 09jan07
from Random Puzzles by andychess
Nikolai Krogius (1930-)
from Player of the day: notable game III by nikolaas
34 blancas
from puzzles by ALEXIN
34.? (January 9, 2007)
from Tuesday Puzzles, 2004-2010 by Phony Benoni
34.? (Tuesday, January 9)
from POTD Kings Indian Defense by takchess


home | about | login | logout | F.A.Q. | your profile | preferences | Premium Membership | Kibitzer's Café | Biographer's Bistro | new kibitzing | chessforums | Tournament Index | Player Directory | Notable Games | World Chess Championships | Opening Explorer | Guess the Move | Game Collections | ChessBookie Game | Chessgames Challenge | Store | privacy notice | contact us
Copyright 2001-2018, Chessgames Services LLC