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Arthur Bisguier vs Aleksandar Matanovic
Bled (1961), Bled YUG, rd 18, Sep-30
Bogo-Indian Defense: Grünfeld Variation (E11)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Jan-07-17  wtpy: Hadn't gone to sleep yet and got the first three moves and then went down a wrong path. This is a case where it could aid a player to write a note about which knight goes where, but chess rules wont let you. As Kilgore Trout would say: "So it goes."
Jan-07-17  NBZ: The obvious move is 85. ... Nf5 hoping for h6. (1) After 85. ... Nf5 86. h6? Nxh6 is a draw after 87. Ka2 Nf5 88. Ka1 Nd4 89. Ka2 with a mutual zugzwang. With two knights on the board, White has no way to lose a tempo. (2) But after 85. ... Nf5 86. h6? Nc3! 87. h7 Nd4 and mate on b3.

However, White can meet 85. ... Nf5 by 86. Ka2! Now there does not seem to be a win: for example 86. ... Nd4 h6 and Black only has a perpetual with 87. Nb3 h7 88. Nc1+ Ka1 89. Nb3+.

Let's do first things first: Black can use the restricted position of the White king to improve the position of his knight. So let's play 85. ... Nd2! 86. Ka2 Nc4 87. Ka1 Nd6 88. Ka2 Nb5 89. Ka1


click for larger view

Almost the same as the starting position, except the White knight on b5 does everything it did on b1 in addition to having the option of swivelling over to the d4 square.

Now we will try Nf5 again. 89. ... Nf5 90. Ka2! (90. h6 loses just as before) Ne3! 91. h6 Nd1 92. h7 Ndc3+ 93. Ka1 Nd4 94. h8=Q Nb3#.

Very pretty line if it works. The knight on b1 gives mate from b3: hardly what I expected when I first looked at the position.

Jan-07-17  NBZ: I see that I mucked up the obvious line, and found a way to delay the mate by 4 moves. At least it's still well within the 50 moves rule :)
Jan-07-17  AlicesKnight: I was a little surprised that 86.h6 was not tried, but <YouRang> seems to have it right.
Jan-07-17
Premium Chessgames Member
  lost in space: Got that right away
Jan-07-17
Premium Chessgames Member
  gofer: This was far to easy for a <Saturday>.

A forced mate in six moves is hardly rocket science!

All you have to work out is that once the king is on a2, the best checking square for the "mobile" knight is c1. From there you simply have to find a path to reach c1 and then count the number of moves. If the h pawn promotes before the check on c1, then its a draw if it doesn't then its a win...

85 ... Nf5
86 Ka2 Nd4
87 h6 Nb3/Ne2
88 h7 Nc1+
89 Ka1 Nd2
90 h8=Q Nb3#

Jan-07-17
Premium Chessgames Member
  agb2002: Black has two knights for a pawn.

Black can deliver mate with 85... Nf5:

A) 86.h6 Nc3 87.h7 Nd4 88.h8=Q Nb3#.

B) 86.Ka2 Nd4 87.h6 (87.Ka1 Nc3 as above) 87... Nb5 88.h7 Nc3+ 89.Ka1 Nd4 90.h8=Q Nb3#.

Jan-07-17
Premium Chessgames Member
  morfishine: Another solution is the maneuver Nd2-f1-g3 followed by Nxh5; White would then be free to execute the 2N mate in 379 moves subsequent to the obligatory opponent's blunder

*****

Jan-07-17
Premium Chessgames Member
  thegoodanarchist: This is great - I can replay a game from 55 years ago whenever I want.

Can I replay any and every pro soccer or football or basketball (or baseball or whatever) game from 1955, whenever I want?

I might get lucky and find it on youtube, or most likely no. But with chess? Close to 90% or more of them, and this one is a treat.

Jan-07-17  Sally Simpson:


click for larger view

Just one of the great attractions of Chess. With the pawn on h5 it is a win. With no pawn on h5 it is a draw.

Won a pint once in Sandy Bells by saying I could mate with two Knights v a bare King. The lad was positive no such position could be set up unless it was in the corner of the board.


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1.Nb6+ Kc8 2.Ne6 mate.


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Not forced but it is checkmate. Which brings us on nicely to Kotov vs Najdorf, 1953


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Kotov wanted to play on explaining to the perplexed Najdorf that a Siberian amateur had worked out a forced mate with the two Knights. (see thread)

Jan-07-17
Premium Chessgames Member
  YouRang: It looks like black could have unleashed his Nh6 a couple moves earlier, when he faced this position.


click for larger view

The N that prevents the king from escaping via a3 does that job just as well here at c4 as it would at b1. He could now play <83...Nf6> and proceed with the same technique described by <An Englishman> above.

This is not a criticism though. Black played this difficult ending excellently since the final capture back on move 68. I assume he moved his N to b1 because the technique he was familiar with concluded with this mating pattern.

Most GMs play a whole career without needing this ending technique, so it's impressive that he knew it so well.

~~~

Looking at endgame explorer, I see that there are 55 game in the cg.com database with this ending.

Of these, 30 finished a draw:
Endgame Explorer: NN vs P

And 25 in which the 2N side won:
Endgame Explorer: NN vs P

Jan-07-17
Premium Chessgames Member
  Jimfromprovidence: The text after 85...Nf5, below. ( white gets mated in 5 moves)


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The same position as above but with the pawn on h6.


click for larger view

White to play and draw.

Jan-07-17
Premium Chessgames Member
  YouRang: One of the interesting drawn P vs NN games featured Anand failing to find the right technique. I just put some comments about it there:

Wang Yue vs Anand, 2009 (kibitz #13)

Jan-07-17  1 2 3 4: Unbelievably easy for a Saturday
Jan-07-17
Premium Chessgames Member
  YouRang: <Jimfromprovidence><White to play and draw.>

An interesting "White to play a draw" problem because it's really *black* who must find the right technique. ;-)

Jan-07-17
Premium Chessgames Member
  ChessHigherCat: Two knights is the night (everlasting)
Jan-07-17  varishnakov: 85...Nf5 86.Ka2 Nd4 87.h6 Nb5 88.h7 N5c3+ 89.Ka1 Nd2 90.h8=Q Nb3#
Jan-07-17
Premium Chessgames Member
  Marmot PFL: If WK is on a2 black mates with Ns on b1 and c1, if the K stays on a1 than the mate happens with Ns on b3 and c3. The Nf5-Nd4-Nb3 path isn't too hard to find.
Jan-07-17  petemccabe: When I was maybe 10, Bisguier played a simultaneous exhibition in my home town (Scarsdale, NY). This is the first time I've seen a game on Chessgames featuring a player I've played against!

Meanwhile, being a casual (1500 or so) player, I always thought K+NN v K was a draw. I had no idea that an extra pawn could make things worse for the King.

Jan-07-17  Kasparov Fan: a very interesting position indeed
Jan-07-17  Absentee: <1 2 3 4: Unbelievably easy for a Saturday>

Yeah, I'd like to think I'm good, but this was easier than most Saturdays.

Jan-07-17
Premium Chessgames Member
  chrisowen: I pelter ham o f5s flunks o a2s its ave vis o d4s dunks h6s huffold bud b3s bug choochoo vonlyus 87...N2 mod its eve vis bud maters oustus von guv choochoo hungoffs 88.h7 hunklung u c1s cub o a1s its ave vis o d2s dub mockus bud maters oustus v tip luckso cog rog von guv comers viewus hid dub bus fanyus jan buz its i ate choose vim whipper rod its i waitly vis chessus lively prodly its vam watchers vis luv vim dip watches dripin vim crapes widths vim pacers recaps vim parsec widths watchy prides vim predict thawsly cor o f5s footus ham o f5s flunks o a2s its ave vis o d4s dunks h6s huffold bud b3s bug choochoo vonlyus 87...N2 mod its eve vis bud maters oustus von guv choochoo hungoffs 88.h7 hunklung u c1s cub o a1s its ave vis o d2s dub mockus bud maters oustus v tip plight linkus kry rog ghosts gotcha v cog comely met v view widthy hid doh dub bus foster fay any fan yan nab auldly jan buz its i ate choose vim whipper rod its i waitly vis chessus lively prodly its vam watchers vis luv vim dip watches dripin vim crapes widths vim pacers recaps vim parsec widths watchy prides vim predict thawsly cor o f5s footus thorny ground fur vow off fought clunks its i eveoff vis avowlug guvnor 76.K3 cod its ave vis bud maters avowlug guvnor 76.K5 cod its i avowly vis contus bud fly von guv boldus u dog doorus its ave its eveoffs its eve vis foodus for thought bud dug buffus vis hoodus bunghug lub bug u clunks o bod hud dunkhug its eve vis avowlug guvnor 76.K3 cod its ave vis bud maters avowlug guvnor 76.K5 cod its i avowly vis contus cob crudly vis clunks bud doorus lug dunkus hug u crunks o c2s cub o doorus bud fly its i avowly vis avowlug govnur 76.K3 cod its ave vis bud maters avowlug guvnor 76.K5 cod its i avowly vis contus dun choochoo flunks;
Jan-07-17
Premium Chessgames Member
  chrisowen: 85Nf5 footus kindly o bog gob grubus uvs hmm von guv lug gullus goldus glugus bungus lungus gulpus gollyus lug o f5s founds foboff foodus fluffs fogshm h7s hungluft thought god o f5s flushy frogjo von guv u frocks foolus founts flopin vis o furnus von guv rug u f5s foglug footus fowlus flunks flubbs von guv o f5s flushy hoofus huffus hotfoot hog founds fog fun gustus guv nub fur vow off fought clunks its i eveoff vis avowlug guvnor 76.K3 cod its ave vis bud maters avowlug guvnor 76.K5 cod its i avowly vis contus hog hug hungus h7s honkluft v roomly o gulchy goofus guffus flushy hoofus huffus off buffus cuffus duffus huffus guffus muffus hmm puffus nuffus choochoo guvnor 86.K2 Nd4 87.h6 Nb3 mod buckus choochoo mountus 87...N2 mod its eve vis bud maters oustus choochoo hunghunt 88.h7 Nc1+ cod mootus cob choochoo pelthungs 89.K1 Nd2 dub mockus bud maters oustus mob bombus bum roomus bumpus bootsy von guv thought h8s hunghoods out jan buz its i ate choose vim whipper rod its i waitly vis chessus lively prodly its vam watchers vis luv vim dip watches dripin vim crapes widths vim pacers recaps vim parsec widths watchy prides vim predict thawsly cor o f5s footus thorny ground h7s hunghood jooply vis cud fog workly von guv bootus von guv thought concsly vow bus kongly bootus vowus rumpus von guv thoughts woulds ums fog froggy fun gustus guv nub fur vow off fought clunks its i eveoff vis avowlug guvnor 76.K3 cod its ave vis bud maters avowlug guvnor 76.K5 cod its i avowly vis contus dux exodus von guv bus hog hungus h7s huntgood gulchy dud hod hoodus doh dog god goodus dug cod doc dud a3s its ave vis o a5s its i avowly vis contus ums huffus i oddus huffus vis o hod hmm bud ohm bog con don cod bun fog gun duckus wus cor o f5s footus finish;
Jan-08-17  schachfuchs: Nobody likes my final moves 89.Ka1 Nc3 90.h8=Q Nb3# ? ;-)
Jan-08-17  N0B0DY: <schachfuchs> That's exactly right!
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