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Alexey Korotylev vs Zviad Izoria
"The Koroty Kid" (game of the day Nov-19-2014)
Moscow-ch op (1998), rd 1
Nimzo-Indian Defense: Normal Variation. Bernstein Defense (E58)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Feb-14-13  Tysonh: Maybe someone already has pointed this out: The position on the board on the homepage differs from the position after blacks move 25 in the game. On the homepage there are black pawns on f5 and g4 and no black pawn on g6. And white has no f-pawn. This is my lame excuse I could not find the move f5. Probably I had not found it anyway, but I went for Th5, which seamed winning.
Feb-14-13  mistreaver: Thursday.White to play. Medium. 27?
White has obvious attack, but has to find "THE" move to break through.
a)27 Qh5+ won't do
27... g6
28 Qh7+ Ke8 and king slips away.
b)I quite like the following try:
27 Rf1! now black has some choice:
b1)27...gxh3 is unfavorable:
28 Rxf5+ and black is defencles:
b11) 28... Ke8
29 Rxf8+ Kxf8
30 Qh8 mate
b12) 28 ... Nxf5+
29 Qxf5+ Rf6 (Ke8 30 Qxf8 is mate)
30 gxf6 and i think white is much better here,
the rook is at the mercy of bishop, king is in trouble, fxg7 is threatened. b2) if black rejecets the sacrifice.
27... Ke8 then simply
28 Bxf5 Nxf5
29 Rxf5 Rxf5
30 Qxf5 is decisive.
Time to check.
------------------
Oops, zero for me today, in my line
27...Ke8
28 Bxf5 then
28.. Rxf5!
29 Rxf5 gxh3
and black is even winning.
and even in the given line
27... Ke8
28 Bxf5 Nxf5
29 Rxf5 Rxf5
30 Qxf5 gxh3
31 Qxe6+ Ne7
white merely has slightly superior endgame in the event of 32 Bxe7 Qxe7
33 Qg8+ Qf8
34 Qxd5.
Some satisfaction is that the "greedy" gxh3 does win for white, but unfortunately it is not enough to claim that i solved this one.
Feb-14-13
Premium Chessgames Member
  chrisowen: I proof in engage the troopsit hand in look advance,

frees it is ardoure 27...Bxf5 in tempted iron out the wrinkles it staunch fare in booby it is printed 27.gxh3 in hug the rail good heavens it simply all works it dominate sitter have in dutifuls it he in a good while got rook over sit on youthful 28.rf1 levers it suck in geoffrey 28...rh6 I prefer sitting duck f5 look it swap off in d7f5 advantage light ok in every it is bin feed opening good game it slot dingy ebony in ivory,

at climbing 28...Nxf5 look it stare in backboned 29.Rxf5+ now ledge in e8,

only it smooth in con 30.Rxf8+ in bad flop for height in can alley ogle 30...Kd7 when roar it on in jacket ramp rail in her o 31.Qxg7 all done bar the fat lady it singing out leggy it sag o 31...ne7 grow black knight yet I acute cane able elephant ball for too 32...Rxe7 mate intent book it g4 in.


click for larger view

Feb-14-13
Premium Chessgames Member
  chrisowen: Back to proceedings it suffixed 28.rh6 allow ground,

forfeit some a cull patch in alinkford 29.bd7+,

in admin I sit double in theory it vain vindicate am cracks it shop g6,

enact delve opens lines it seem like for together bind e5 again,

enters it pin timethod mangle ko in you f5 sit st in he vale go building roof1 applaud cherish in seems it is warden covers it place in key to believe its herd rag on bin feed-mind 29...Nf5 only it stave off the inevitable,

grits in teeth bared on in among re edifice in effect he knight in forte again ravissimo reign d7 own on eyes it now mr heffalump,

it sight off l0 intricate 29.bd7+ Nf5 30.Rf5+ cries out in fathom age it black rod enter giddy it shave in flinch across it hope 30...rf6 bone in the throat,

for black it swallow in cry a 31.Rxf6 in date have flicking alone the road in together am for conclude a nefarious it beguile in change ravissant it suffice to learning h3 and I h6 flipflop bang to rights it spin fetch a d7 ring f5 an f1 I reflux!

Feb-14-13  bengalcat47: The final position makes a rather pleasing symmetrical pattern in the way that the black king is denied the 2 white squares on his left by the white bishop (King Bishop in older terminology) and the queen prevents the king from using using the 2 white squares to his right. One could say that Black's unfortunate king is trapped in a "square of doom."
Feb-14-13
Premium Chessgames Member
  kevin86: One rook is expendable as the queen and vishop can bracket the king in. The other rook forces mate along the f-file.
Feb-14-13  MountainMatt: 27. Bxf5 was the very obvious first move, where all I saw was huge material loss if black recaptures. As usual, I didn't look beyond that, so I missed the game continuation. Typical Thursday.
Feb-14-13
Premium Chessgames Member
  Jimfromprovidence: I tried 27...Ke8 as a defense with the continuation 28 Bxe6 gxh3.


click for larger view

I thought of 29 Qxg7 but decided to run the position through Rybka freeware. It found the amazing 29 Rf1!, which is a forced mate for white.


click for larger view

Feb-14-13  JG27Pyth: @<David2009> Thanks for the Endgame trainer link. Fun. I managed a long but ultimately pretty easily won endgame the first go round. After a bit of fiddling the fastest least error prone win I found against Crafty (who deviates at move 28) was 28...Nxf5 29.Qxf5+ Kg8 30.Qxe6+ Rf7 31.Qe8+ Kh7 32.Qxf7 and black has no reason to continue.

Good puzzle.

Feb-14-13  BOSTER: <fokers13> <Got it within seconds>. Please, show your solution (your line).
Feb-14-13  JG27Pyth: @<JimfromProvidence> Wow. Ke8 is surprisingly playable if it weren't for Rf1! (A jaw-droppingly patzerlike purposeless exchange that dissipates the attack giving a free move to Black except -- oh wait -- it's actually crushing Removing the defender of the backrank to reveal the coordinated visegrip the bishops have on the poor black king.
Feb-14-13
Premium Chessgames Member
  agb2002: White has the bishop pair for two knights and two pawns.

Black threatens 27... gxh3.

The position of the black king suggests 27.Bxf5, to open the f-file:

A) 27... gxh3 28.Rf1 (trying 29.Bg6#)

A.1) 28... Ke8 29.Bxe6 Rxf1+ (29... Nxe5 30.Rxf8+ Kxf8 31.Qh8#) 30.Kxf1 and mate soon.

A.2) 28... Rf6 29.exf6 Nxf5 (29... Kxf6 30.Bg4+ and mate next) 30.Rxf5 Rd8 31.fxg7+ Ke6 32.Qg6+ Kd7 33.g8=Q + -.

A.3) 28... Nxf5 29.Rxf5+ Ke8 (29... Rf6 30.Rxf6+ Ke8 31.Rxf8+, etc.) 30.Rxf8+ Kd7 31.Qxg7+ Ne7 32.Qf7 Qb6 33.Qe8+ Kc7 34.Bd6+ Rxd6 35.exd6+ Qxd6 (35... Kxd6 36.Rf6+) 36.Qb8+ (36.Rf7 Qg6+) 36... Kc6 37.Qxd6+ Kxd6 38.Kf2 and White should win the ending.

B) 27... Nxf5 28.Qxf5+ Rf6 (else White wins the rook on f8 with check) 29.exf6 gxh3 30.fxg7+ wins.

C) 27... Rxe5 28.Bxg4 with many threats. For example 28... Re4 29.Rf1+ Ke8 30.Rxf8+ Kxf8 31.Qh8+ Kf7 32.Rf3+ Kg6 33.Qh5#.

D) 27... Nxd4 28.Qh5+ followed by the capture of the rook on e6 or g6 with check and Qxg4, winning material.

Feb-14-13  snakebyt: Since blkN doesn't take bishop 28...exf5 this end game sequence works.
Feb-14-13  Amarande: The final mating position is somewhat reminding of the one from Steinitz vs Paulsen, 1870.

Any other good examples of this pattern?

Feb-14-13  Patriot: White has the bishop pair for 2 pawns. Black threatens 27...gxh3.

27.Bxf5 rips into the position.

27...Nxf5 28.Qxf5+ Ke8 29.Qxf8+ Ke7 30.Qf7+ or maybe even 30.Rh8.

27...Nxf5 28.Qxf5+ Rf6 29.exf6 gxh3 30.fxg7+ Kxg7 looks strong.

27...gxh3 28.Qh5+ g6 29.Qh7+ Ke8 30.Bxe6 looks strong.

27...gxh3 28.Qh5+ Kg8 29.Bxe6+

Feb-14-13
Premium Chessgames Member
  morfishine: <Jimfromprovidence> Nice work with <29.Rf1>!

I reached your position, but stopped there frustrated...the move was right there all the time...darn :(

Feb-14-13  Patriot: <27...gxh3 28.Qh5+ g6 29.Qh7+ Ke8 30.Bxe6 looks strong.> I evaluated this line wrong--it's dead even according to Houdini. 28.Rf1 is necessary to win.
Feb-15-13  highonlife: Has anyone evaluated, what if black plays ... 27. Ncxe5 !!?
Feb-15-13
Premium Chessgames Member
  morfishine: <highonlife> In answer to your question <Has anyone evaluated, what if black plays ... 27. Ncxe5 !!?> I worked out a line involving a Queen sac starting with 27.Rh5 & 27...Ncxe5:

<27.Rh5> 27...Nxe5 28.Rxf5+ Nxf5 29.Qxf5+ Rf6 30.Rf1 Rxf5 31.Rxf5+ Ke6 32.Rxe5+ (Not 32.Rxf8 due to 32...Nf3+) 32...Qxe5 33.dxe5 Rf3 34.Bb4 Kxe5:


click for larger view

White has 2B vs R+3P, which is not decisive

Nov-19-14
Premium Chessgames Member
  Check It Out: Ossu!
Nov-19-14
Premium Chessgames Member
  morfishine: A myriad of complications that I still haven't worked out
Nov-19-14
Premium Chessgames Member
  Castleinthesky: 13...Re8 seems like a very weak move. Black should have taken the knight at f6 and have opened up the g file. Instead the bishop retreats at 15...Bg6 and the same knight is able to take with initiative.
Nov-19-14
Premium Chessgames Member
  kevin86: Black's king is stuck in the brackets- bishop and queen.
Nov-19-14  Shams: Sweep the leg!
Nov-19-14
Premium Chessgames Member
  Check It Out: Best block no be there.
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