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Alexander Shabalov vs Irina Krush
Chessmaster US Championship 2005 (2004), San Diego, CA USA, rd 9, Dec-04
Sicilian Defense: Paulsen. Normal Variation (B45)  ·  1-0
ANALYSIS [x]

FEN COPIED

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sac: 38.Nd4+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Jan-02-15  fokers13: hardly "difficult" Nd4 is both forced and strong(queen fork and all) and the continuation thereafter is too simplistic

better fit for a wednesday.

Jan-02-15
Premium Chessgames Member
  Penguincw: Hmm. The rook's hanging on f8, so let's grab it. Oh nvm, black's threatening mate on e2.

The solution I came up was close: 38.Rg5+ Ke4 39.Qb7+ Kd3 40.Qxf3# 1-0. Just one flaw: 39...d5, and there is no mate.

Not really hard for a Friday puzzle when I come close to solving it.

Jan-02-15
Premium Chessgames Member
  paulalbert: Agree with comments that this seemed easy for Friday. It must be if I can solve it quickly!
Jan-02-15
Premium Chessgames Member
  patzer2: I'll confess I missed this Friday puzzle. I quickly calculated 38. Nd4+ exd4 39. Rg5+ Kf4

(diagram below)


click for larger view

However, in visualizing this position two moves ahead, I did not see the mate-in-two finish (i.e. 40. Qxd6+! Ke3/e4 41. Qxd4#) to this mate-in-four.

To make matters worse, I gave up on this line and instead went for 38. Ng3+?? which loses to 38...Kf4! (not 38...Kg4?? 39. Ne2+! ) 39. Qxf8 Qxc3+ 40. Kf2 Qd2+ 41. Kf1 Qd1+ 42. Kf2 Qd4+ 43. Kf1 Bg4 44. Ne2+ Bxe2+ 45. Kxe2 Qe3+ 46. Kd1 Qxg1+ (-8.91 @ 20 depth, Fritz 12).

P.S.: I have no problem quickly seeing the mate-in-two when looking at the diagram above. However, trying to see it four moves ahead from this Friday daily puzzle position (38. ?) was (at least for me) much more difficult.

Jan-02-15
Premium Chessgames Member
  Prudov: <paulalbert: Agree with comments that this seemed easy for Friday. It must be if I can solve it quickly!> I agree too. Only a few variations to consider.
Jan-02-15
Premium Chessgames Member
  maxi: Never mind if the problem is difficult or not, the tactics are very pretty.
Jan-02-15
Premium Chessgames Member
  thegoodanarchist: 38. Nd4+!

Not too "Shaby" :)

Jan-02-15
Premium Chessgames Member
  thegoodanarchist: <An Englishman: Good Evening: <posoo>, I pull no one's chain. I might be an Englishman or an English man, but I do not presently live in England.>

Where, then? Ulan Bator?

Jan-02-15
Premium Chessgames Member
  kevin86: Black's king is marched into opposition...and mate!
Jan-02-15  TheaN: Friday 2 January 2015 <38.?>

Odd for a Friday. White has only one real sensible puzzle move, and the ensuing forcing line is nothing compared to what we're used of a Friday puzzle.

White prevents the black mate in one threat (Qxe2#) by forking queen, bishop and king, forcing black to open the e-file. Big pieces decide afterwards: <38.Nd4+ (Ke4/Kf4 39.Nxc2 ) exd4 39.Rg5+ Kf4 40.Qxd6+ Ke3/Ke4 41.Qxd4# 1-0>. Again, odd.

Jan-02-15
Premium Chessgames Member
  chrisowen: Goof f5 rump d5 stake level game thod

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frets play flaps fence feats of ever
achievement take door fares again ticket

swipe d6 after minimal fuss it do in dupe f5 at wack float frame terms king ferns.

Will f5 prove to be a trough king farms hank force e2 up d4 fords the river foils the frame flip the script e7 frill d6 fluff a king frees up ply a mind d5 fiefdom in a tour safe effect of feel cog ave ok king feckle chains feckless i feel ash d4 knight wins on the spotter 37...Kd5 rigs delve drawn downs at drive dasher bet d4 candy check dance away dream of a nest infer tile to temple shrine to mate e2 reverse a trend dares to deals drove away dears deems a bet d5 it dints mire quest doors a doosy d6 in e3 drips in serve fleed it edge in a d4 mate freed it on defeat up have fared it ok in ogle d5 go clock rook glock a gun g5 ho ever a deep f5 in trouble i reed it ok in ogle flute am beck in call eg a free bit ok in over.

Jan-02-15
Premium Chessgames Member
  chrisowen: A beset aint do it every port of call i be at change aka queen co-determine stalls eg a find aim camp try call ash dead in curious why a f5 over d5 a bone of contention alive oomph all i glean a dutiful crum ave good d5 ground after e7 i ment check arm bullshin on hood wink queen i believe peg back gains a nagger tru delight back a guffaw as heartily came beset i flights couple fantasy came f5 line every as i et tu brute a horse cutoff path i c2 gone to cleaner ko in us agree d6 an d4 ever tickle in co gives fateful crums fluffs again among gloats a while huffle an cad to cop edict shuffle go castle in am g5 engine line delve in ear to bone one bandhave king f5 deal carcus beliefs abound a fanciful plug ash a drive chubb too de core an apple one king f5 bad i d5 a faregain lines hoofed it fin de siecle good game thods efface king shuttle gums d5 and angle e6 equals eg ment fetch aim dutifuls 38.Nd4+ balance brave in bow d4 oblivion an obituary in uniform appraisal alive a bobble boot bob a boon boss man sprung bale go rook g5 bod bodes well fob off d4 in bog gob hobble a jobsworth lobover the mob have bind g5 bop dance in bore drill a rob sob f5 botch job bovver e7 wobble a yob d5 a bet down deem dare date over the cake and dales darn dash off in dabs hand dead deem disc g5 i dids up dogs loose at door knob a dumb f5 in bell i dull head good dig dug gourd pour on scorn try takeback 38...exd4 mate in 3 get actioner 38...Ke4 wins at i c2 queen and two pawns ahead try followers 39.Rg5+ fable give spark face off fade on deaf ears of age any og hurt hop along ha feel.

A jaffa bled it ok in ogle g5 flake fame and fortune f8 out an f3 a nest shrine tempo then one short flow engage pave flow g5 face pin fare an fase safe fate fave wafer thin f5 leap fountain of youth coffer tile ground found d6 cannon fodder e7 ment over flood i offer fog of war f4 lock in horse mofty sat d4 on her tofty belly flop g5 quoff for clinch am soften up great goods ever guard it ardent in aim ave gates of heaven gamble adds green grass again ever galls her bet gable mission no guess over work gives to the poor flap gills away gully i swan dives the chaseback 39...Kf4 40.Qxd6+ blacks dead a foilable mission a focus focal point d6 afore mention a fob an off he goes a fog foal rear in e3 re foam par no affect fop float your boat favour done up have free to base woofer tile point of view oap bop over pocket rocket wail f5 pod f4 swim flip out pogo stick a posh nosh in plod along have pontificate as f3 in tomb at e3 troop ok in pour out a rope burn ive a slide in queen d6 top jog around chicken pox yo proof over skim and spon d6 kapow double dipper scent danger true delight in a dancer court dangle dasher bet a denter diggle a dipoff decide desert mission select dingle chain doters a dugout dulcit tones i scan the horizon find a fog dug off mid rates d6 over off glide a doot touch did sift fond good sales d6 sniffed it ok in ogle am d4 choose 40...Ke3 41.Qxd4#

Jan-02-15  TheaN: I find the discussion going into 31....Bxc2?! more interesting than the puzzle. This move is in fact winning:

If 32.Qa7+ Rb7 (missed by user <consul>) wins, as it keeps the threats alive and the white queen is en prise. After the 'best' 32.Bxf8 Be4 white can't defend mate in a sensible manner, and 32.Kxc2 Bxh6 is equally as crushing.

Interestingly, if Black does decide to move the king to e6; 32.Qa7+ Ke6? it leads to a similar move as in the puzzle:


click for larger view

After 33.Nf4+! (though 32.Qxb8 does draw too it has less play for white) white at least draws by exposing the e-file: 33....exf4 34.Qxb8 Bxh6 35.Qg8+ Ke5 32.Qxd5+ Kxd5 33.Kxc2 Ke6:


click for larger view

White is up the exchange but has to play carefully to trade his now weak f6-pawn for the d-pawn with 34.Rd1! yet that position is far from over.

Jan-02-15  BOSTER: When white play 23.Nde2 I guess this was idea to support an other knight on c3.

I think this is very popular idea after the game Karpov vs Korchnoi,1974. So, the question is:

Why did Shabalov change his mind and played 29.bxc3,not Nxc3, opening the "b" file ,when his king was on a1.

Certainly, he could lose another pawn,but not the king in couple moves.

Jan-02-15  consul: Thank you <TheaN>, I really missed the ♖b7 move and also the ♘f4.
Jan-02-15  jheiner: I missed the obvious line. Instead followed the immediate check with the R and forcing a fun mating net with a pleasing final move.

38.Rg5+ Ke4 39.Qb7+ Ke3 40.Qb6+ Kd3 41.Qxd6+ Ke3 42.Rxe5+ Be4 43.Qd4+ Kf3 44.Qf2+ Kg4 45.Rg5+ Kh3 46 Nf4#

There are a few variants, but mostly forced. I looked at up to 40.Qb6+ before deciding it was good enough. (It wasn't.)

Jan-02-15
Premium Chessgames Member
  gars: Very beautiful! I did not solve it, but who cares?
Jan-02-15
Premium Chessgames Member
  varishnakov: 38.N-Q4+ PxN 39.R-N5+ K-B5 40.QxP+ K-K6 41.QxP mate

Knight sac that must be accepted because threatens to win queen. Opens position. King chase. Mate.

For me also this seemed easier than the previous this week.

No tricky defensive moves; all forced.

Jan-02-15
Premium Chessgames Member
  Sokrates: The position before the combination almost looks as a constructed problem. The mate combination is beautiful and subtly depending on the pawn on c3. - It's quite amusing to read how some people find it necessary to state how quickly and easily they solved the problem.
Jan-02-15  HowDoesTheHorsieMove: My first Friday success! I missed that the final white move was a capture, having lost track of the pawn, but I moved all the pieces right.
Jan-02-15
Premium Chessgames Member
  patzer2: Played through this game with my five year old grandson, who thoroughly enjoyed it. He especially liked that it was an aggressive all out mating attack on the flanks by both the WGM and GM.

When we got to the puzzle solution position (38. Nd4+), we fast forwarded to the end of the combination to 40...Ke3 where I let him find the mate-in-one with 41. Qxd4#.

From there, we backed it up to mate-in-two (i.e. 40. Qxd6+), mate-in-three (i.e. 39. RN5+) and finally to mate-in-four or win the Queen with 38. Nd4+!

After a few attempts, he understood the full four move combination and declared himself a "super puzzle solver."

Jan-03-15  dfcx: this is way too easy for a "difficult" solution. Black is threatening mate, so white is forced to act! 38.Nd4+ exd4 (otherwise loses the queen).
39.Rg5+ Kf4
40.Qxd6+ Ke3/Ke4
41.Qxd4#
Jan-03-15  stst: Try

38.Nd4+ exd4 (else if K flees, N takes Q and Black has no play at all.) 39. Rg5+ Kf4 (forced)
40. Qxd6+ Ke4/e5
41. Qxd4#

not sure if I missed anything....

Jan-03-15  stst: my typo for

40.......Ke4/e3

thx

Jan-03-15
Premium Chessgames Member
  An Englishman: Good Evening: <thegoodanarchist>, no, but Ulan Bator has always been one of my favorite place names.
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