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Vitaly Tseshkovsky vs Boris Itkis
16th Soviet Team Championship Final-B (1983), Moscow URS, rd 4, Jul-26
French Defense: Winawer. Advance Variation General (C16)  ·  1-0



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sac: 43.Rxc7+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Mar-27-13  whiteshark: <Phony Benoni:

<44.Rxc7+ is an easy move to find when in puzzle-solving mode; any move that may draw the king into a double check is worth investigating. It might not be that easy if you were actually playing the game; with a rook ahead, you might go into safety first mode and try to trade pieces. (That h-pawn looks ready to roll.)>>

So let it be written!

Mar-27-13  zb2cr: This one has many short variations. If you can keep all of them straight, it's easy to see that 43. Rxc7+, Kxc7; 44. Nd5+ leads to mate or the loos of Black's Queen. Since Whit is already a Rook up, it's not really a sacrifice.
Mar-27-13  cocker: For me the difficulty was seeing that Black loses queen or is mated in final position.
Mar-27-13  David2009: Tseshkovsky vs B Itkis, 1983 White 43?

In this unusual puzzle White is a Rook ahead so has a choice of wins. The most direct seems to be 43.Rxc7+ Kxc7 44.Nxe6++ K moves (where?) and White has mating threats with the simple NxNd4 in reserve. Time to play this out against Crafty End Game Trainer: ====
The game ended differently: 43.Rxc7+ Kxc7 44.Nxd5+! forcing mate or the win of the Queen.

click for larger view

The EGT declines the Rook with 43...Rh6 and loses quickly, so here's a link to the game position when Black accepts the sacrifice: The game line 44.Nxd5+ does indeed win the EGT's Queen, so let's look at the alternative 44.Nxe6+. The EGT replies 44...Kd7! (a move I should have seen and analysed - egg on my face!) 45.Kd7 45.Nxd4 Qxh5. Fortunately for me, Black's King is too exposed to survive and I win by co-ordinating my pieces and then finding a way to escape the nuisance checks: 46.Qg7+ Ke8 47.Qg8+ Ke7 48.Qe6+ Kf8 49.Nf5. The Black checks will soon run out with my King better placed and/or gaining more material, meanwhile the mate threats hinder Black. In fact the ever-pragmatic EGT now goes quietly: 49...Qf7 50.Qc8+ Qe8 51.Qxe8+ and it is all over bar the checkmating.

Clearly there are many ways for White to win in the original puzzle position: here's a further Crafty EGT link to explore some of them: As always when playing the EGT interactively, you are white, drag and drop the move you want to make.

Mar-27-13  goldenbear: I would have probably played Ne2 and cast a "you're still playing?" glance. That wins faster than the game continuation because if your glance is good enough, you will force immediate resignation.
Mar-27-13  puliskarakter: this is too easy.
Mar-27-13  avidfan: This is just another fine example of how well the knight and queen cooperate as seen in the variation where the king accepts the sacrifice. 43.Rxc7+ Kxc7 44.Nxd5+ (double)

click for larger view

44...Kc6 allows 45.Ne7+ and 46.NxQ/f5

44...Kd7 45.Qc7+ Ke8 46.Qe7#

44...Kb7 45.Qc7+ Ka6 (45...Ka8 46.Nxb6#) 46.Qxb6#

Mar-27-13  Herma48852: Dang .. miscalculated with the wrong follow up: I chose 45.Nxe6+ instead of 45.Nxd5+ where I missed 45...Kb7 46.Qc7+ Ka8! where it looks like White has to settle for a perpetual.
Premium Chessgames Member
  patzer2: After 45. Nxe6+ (stronger of course is the game continuation 45. Nxd5!), my play at <David2009>'s link against Crafty went 45...Kd7 46. Nxd4 Qxh5 47. Qg7+ Ke8 48. Qf6 Qf7 49. Qxf7+ with an easy win.
Mar-27-13  apexin: White to play
Tseshkovsky vs B Itkis

43. ?
See game for solution.
Difficulty Scale: Medium/Easy

Material: White is exchange up
Attacked squares/Attacking possibilities:
Posiible theme: Knight sacrifice/Rook sacrifice

Let's have a go at this one:
43.Rxc7 Kxc7 44.Nxd5 and mate
But black doesn't have to take the rook and can go to b8 43.Nxd5 and what if ...Nb5 ???

I was right with my first look:
43... Kb8 is not much better than a instant regination.

Mar-27-13  DarthStapler: Got it
Premium Chessgames Member
  kevin86: I think the key is finding the proper DOUBLE CHECK:Mate will come in a few moves (or even one,depending on black's reply)
Premium Chessgames Member
  kevin86: Black CAN stop the mate via Kc6,but Ne7+ wins the queen for a horse!

(My Queendom for a Horse!)-by Richard the turd.

Premium Chessgames Member
  chrisowen: Aim cinched it alive in blew I 41...Qb4 pining rook,

in c3 and threats in abound to win b3 keep black fighting queen rook instead lurch you f6 f5 rally,

vs line see 43.Rxc7+ eg free con 43.kxc7 or Ka6 wailing tale white simply in boot camp 44.Qd3+ swapping queen's off tender f5 advantage of f4 light e6 will fall and be a piece up ride lion 44.Nxd5+ light now in the little fokker mitigate a,

king double check off team d5 and a g3 combine to,

knight win queen fade bad "dont get shirty" it a force in to be reckoned with having winding up low again,

king scam 44...Kc6 when egatz 45.ne7+ drives king to d7 and yin cap doff goggle 46.Nxf5 lower the barricade one forced it is hoot in garb you 43.Rxc7+ seek lept 44.Nxd5+ o hind calm 44...Kd7,

for dutiful crums it down in free classic slice in pursuit trivial capital in cascade tour light 45.Qc7+ look done and dusted him feel kitten 45...Ke8 when garden 46.que7 mate

Premium Chessgames Member
  chrisowen: Impeccable taste in see a fertile ground for clinch,

a rook it seem like for together f6 itz a blessing,

in disguise for cuff knight alive get it is able give white good game thod 43.Rxc7+ in carry for,

inch along odins hammer see you rub let in free I,

probing silver tickle go building some gall eon for,

back queen a line for 43...kxc7 circus again business cruise a wave in for cart nags 44.Nxd5+ time swoon in jaggard you rick back 44...Kd7 to a centre plan gauge 45.Qc7+ off re yes it now in gg,

tack at c3 om in gadzooks again chow a steed in d5 a goofed see free forthright east knight beef in every a project the eyes in west f6 I rupture abracadabra v in esp ark our knight climbing game!

Mar-27-13  BOSTER: White built the discovery attack, moving the queen and knight on the same diagonal h2-b8. The stage is set. So, 43.Rxc7+ was obvious.
Playing without rook is not very easy, and I guess black should accept the sacr. 43...Kxc7. Here I was dazzled by taking the black knight very fast, and I'd play 44.Nxe6++ without hesitations. 44... Kd7 45.Nxd4 and after Qb1 or Qxh5 I guess white will win. But when I saw that white played 44.Nxd5 , I understood how greedy I am.

Heisman called this Quiescent Errors-when you stops analysing the pos. without considering all captures and threats.

Mar-27-13  hez: Very easy puzzle - the moment you see that K cannot go to a white square or stay on a black square after ++
Mar-27-13  MountainMatt: All I saw was 43. Rxc7+ Kxc7 44. Nxe6++ forking the knight and consolidating the material advantage. 44. Nxd5++ did not even begin to occur to me (didn't see the mating/queen-winning net), more evidence that I'm going to have to be happy with being a mediocre player. So be it!
Mar-27-13  Patriot: <morf> Thanks! 43.Nxd5 is not as forcing but that's the move that stood out after assessing the position (i.e. observing the coordination of the pieces). I only wish I had considered 43...Nb5 in that line which is a nice attempt (though failing) to refute everything.
Mar-27-13  James D Flynn: White is up a R for 2 pawns.
43.Rxc7+ Kxc7 44.Nxd5+ Kc6 (if Kd7(if Kb7 45.Qc7+ Ka8 46.Nxb6#) 45.Qc7# Ke8 46.Qe7#)45.Ne7+ Kd7 46.Nxf5 Nxf5 47.Qg6 d4 48.h6 and the only way to stop the h pawn from queening is Nxh6 then $9.Qxh6 leaves Black a Q down.
Mar-27-13  Abdel Irada: <goldenbear: I would have probably played Ne2 and cast a "you're still playing?" glance. That wins faster than the game continuation because if your glance is good enough, you will force immediate resignation.>

That could lead to an amusing continuation: 43. ...Nb5 44. Nd4!, Nxc3 45. Nxf5, Ne4† 46. Ke3, Nxg3 47. Nxg3 .

Mar-27-13  BOSTER: <Patriot> <43.Nxd5 Qxd5 44.Qxc7+ Ka6 45.Qc8+ simlify and win>. I don't think this is correct <Puzzle> solution. After 45.Qc8+ Ka5 black has enough to play (diagram). For ex. 46.Qc4 Nb3++ 47.Kc2 Qd2+ 48. Kxb3 Qb2#

click for larger view

Correct move for puzzle is 43.Rxc7+ with 44.Nxd5++ after 43...Kxc7.

Mar-27-13  Abdel Irada: <BOSTER>: In <Patriot>'s line as you cited it, 45. Qc8†? is not the way to simplify. Better is 45. Qc4†, when the queens come off and the h-pawn roars.
Mar-27-13  Patriot: <BOSTER>/<Abdel Irada> Here's my original post:

<White is up a rook for 2 pawns. 43.Nxd5

43...exd5 44.Qxc7+ Ka6 45.Qc8+ Simplify and win.

43...Qxd5 44.Qxc7+ Ka6 45.Qc4+

43...c6 44.Qc7+ and mate next

I don't see much else for defense.>

<BOSTER>, you mis-typed my line as you can see above. You are right that 45.Qc8+ is a mistake, which is why I wrote 45.Qc4+ in that line.

Mar-27-13  MostlyWatch: White has 3 pieces to Black's 2, but black has a slight position advantage in general, in that black pieces are nearer white king while black king is back out of the fight - except that white's rook is lined up on square c7, and so is the white queen when the white knight be moved out of the way. Exploiting this is the key for white to win.

Attacking with the rook solo is good; it may be a sacrifice or the black king may step away (back, or to the sideline.) None of these responses works for black.

Also good is eating the pawn at d5 with the white knight. Like Rc7, this rolls up black pretty fast. Taking the other pawn, Ne6, doesn't work as well and I don't know exactly why. The knight fork is dramatic but won't occur if black sees it.

I had Stockfish / Chess Wizard (it's free) play both sides from this position, trying various first moves for white one or two times each at the first 9 level settings. It doesn't do the same thing each time with identical settings. So it's kind of like a Monte Carlo test procedure.

Attack with the rook, 43 Rxc7
white always wins at all levels.

Take the forward pawn with the knight, 43 Nxd5
white always wins at all levels.

Take the rearward pawn with the knight, 43 Nxe6
black wins at level 1 and 4
draws observed at levels 2 thru 9
no white wins

Solutions that don't attack the black king right away have the problem that black has a pawn very near promotion, and the black queen can move down there and help that happen while repeatedly sticking up the king. The key to blocking this, if not attacking the black king right away and thus keeping black queen busy with defense, is white Rc1 before the black queen gets down there.

Starting by advancing the white h pawn seems to me an intriguing idea, but I don't know how to tell the process playing white to prioritize getting that pawn up there. It doesn't have a game plan or strategy or high-level goals of any kind. It obviously just looks so many moves ahead and picks the one that looks best from that distance. You or I can realize that getting a 2nd queen equates to winning the game, but the computer doesn't value it in and of itself, since the win is a few moves farther along, over the horizon. You will often see a computer wait until the pawn is promoted, THEN take it - taking a queen scores higher.

Move the h pawn up the sideline first, 43 h6
draw at levels 1,3
white wins at levels 2 and 4 thru 9

Chess Wizard playing white generally just loses interest in that pawn and lets it go but white still wins usually. I don't know how a good human player would fare by pursuing this objective.

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