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Alexander Tolush vs Nikolai Georgiyevich Kopilov
Leningrad (1954)
Dutch Defense: Raphael Variation (A80)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
Oct-09-08  DoubleCheck: At first glance I was too occupied looking at Bxd4?? for some reason but when I saw a comment with Bxg4 then i relooked and realised point of that sacrifice was to enable Qg6+

then after 22...Qg6+ black can "windmill" white

21...Bxg4
22. Qxg4? Qxg6+!
23. Ka1 Nc2+
24. Kb1 Nxe1+
25. Ka1 Nc2+ (if 25. Kc1 Qc2# mate)
26. Kb1 Nxd4+
27. Ka1 Nc2+
28. Kb1 Ne3+
29. Kc1 Nxg4+(queen) - (or 29...Qc2# mate)

Im guessing others found this windmill too?

Oct-09-08  Manic: <KasparovFan123> Black loses after 21...Bxg4 22.Qxg4 Qg6+ 23.Ka1 Qc2 24.Rd2 because your suggested 24...Qc1 loses to 25.Nxc1.

The line posted by <kap54> looks to be the best.

As for me, I only saw the windmill winning all the material instead of the mate.

Oct-09-08  LaFreaK: <DoubleCheck> At first glance I was too occupied looking at Bxd4?? for some reason but when I saw a comment with Bxg4 then i relooked and realised point of that sacrifice was to enable Qg6+

then after 22...Qg6+ black can "windmill" white

21...Bxg4
22. Qxg4? Qxg6+!
23. Ka1 Nc2+
24. Kb1 Nxe1+
25. Ka1 Nc2+ (if 25. Kc1 Qc2# mate)
26. Kb1 Nxd4+
27. Ka1 Nc2+
28. Kb1 Ne3+
29. Kc1 Nxg4+(queen) - (or 29...Qc2# mate)

Im guessing others found this windmill too?

28. Kb1 Ne3+
29. Rd3 Qxd3
30 Kc1 Qc2 mate

Oct-09-08
Premium Chessgames Member
  agb2002: Black is an exchange and a pawn down but the white king's position looks weak, specially the white squares (diagonal b1-h7).

A) 21... Bxg4 (threatening Bf5)

A.1) 22.Qxg4 Qg6+ 23.Ka1

A.1.a) 23... Qc2 (threatening Qxd1+, Qxa2# and Qb2#) 24.Rd2 and white seems to hold.

A.1.b) 23... Nc2+ 24.Kb1 Ne3+ wins the queen.

A.2) 22.Qe3 Bf5+ 23.Ka1 Nc2+ winning the queen.

A.3) 22.Qg2 Bf5+ 23.Ka1 Nc2+ 24.Kb1 Nxe1+ winning the bishop and the queen.

A.4) 22.Qxe7 Bf5+ 23.Ka1 Nc2+ 24.Kb1 Nxe1+ winning the bishop.

A.5) 22.Ka1 Bf5 23.Qxe7 (other moves lose the queen as above) Nc2+ 24.Kb1 Nxe1+ winning at least a piece.

A.6) 22.Bxb4 Bf5 23.Qxf5 Rxf5 24.Bxa3 Qa6 25.Ng3 Rf2 26.Bb2 Qg6+ 27.Ka1 Qc2 28.Rb1 Bxd4 and black wins.

I think I won't consider other candidate moves. Time to post and check.

Oct-09-08  HelaNubo: Flicflac: dzechiel I saw that EXACT same line that you saw with the EXACT same thought process and reaction when I saw that I was wrong. o well.

Again, I could say the same, just like almost every day. Dzechiel, I must do your acquaintance, its curious to have such similar thought processes every day. Today I would add that my own line foresaw also: 21. Nxd5 Be6 22. Qa5 (as the threat of 22... Bxb3 is devastating) Qc6 23. Rg1 Qe4+ and Qxe2, but completely missed the winning response 23. d5!! .

Lesson of the day: it is most dangerous when you win in some lines of the next move, because you get hypnotized by the winning lines and miss the simple countermove which can destroy you.

Oct-09-08  moonrain: Besides the puzzle itself,
a double-edged position makes an "innocent" developing 20 .. Ne2 a gross mistake. White must have been at win either after 20. Rc1 or a straightforward 20. Bxb4.
Oct-09-08  Athamas: dzechiel, in your line, I believe it goes bad at move 23... White would respond by 23. Qc5 I believe.

Up a rook, I don't think white would be too afraid to trade queens and develop into end game.

Oct-09-08  resty: 21...Nxd5 was my choice, hehe.
Oct-09-08  newzild: I missed this too.

I saw the same variation as Dzechiel - 1...Nxd5, when 2.Qxd5 runs into 2...Be6 followed by 3...Bxb3.

Maybe "our" 1...Nxd5 move is okay? Any computer analysis would be more than welcome...

Oct-09-08  goldfarbdj: I also missed it. This one struck me as kind of hard for a Thursday...or at least it was difficult in a different way from most Thursdays; the key move was hard to find, like a Wednesday.

<newzild>: As Athamas says, just above, after 2. ... Be6 white has Qc5. (I did see *that* much at least.)

Oct-09-08
Premium Chessgames Member
  agb2002: Today's mistakes:

1) I didn't consider 22.Ng3 because of 22... Bxd1, overlooking the reply 23.Bxb4. However, black has the intermediate 23... Bf3.

2) I missed 26.Ne4 in my line A.6) since white's moves looked to me like some kind of 'pacific spite checks' after losing the queen and remaining his king so vulnerable.

3) I failed to see the mate attack in my line A.1.b) because winning the queen is normally such an overwhelming advantage that I tend to follow Nunn's advice: don't analyse unnecessary tactics (DAUT).

Not too bad for me, anyway.

Oct-09-08  chopin4525: Without considering the material on the board I noticed quickly that the white king and the white queen were lying on the same diagonal so I looked for a bishop move but 21.Bf5 it was not possible beacause of the g4 pawn so we need to capture this pawn in order to place the bishop here. We need to consider also white answer to this threat: 22.Qxg4 loses immediatly because Black continues with 22...Qg6+, 23.Kg1,Nc2+ 24.Kb2,Nxd4+ and now white must sacrifice material queen or rook and black takes the upper hand. In order to survive white has to do something else: other moves like 22.Rd3, Rc1,d6 lose to 22...Bf5! 23.Qxf5, Rxf5 so the best continuation for white is to recapture some material, hoping to survive someway to black storm,with 22.Bxb4.We already know the continuation 22...Bf5! 23.Qxf5, Rxf5 and white has a huge advantage.
Oct-09-08  Marco65: 22.Ng3 might not be the best defence but is probably the one that most requires precision on Black's behalf to win:

22...Rf4! (22...Bxd1 23.Bxb4 Bxb3 24.Qe6+ Qxe6 25.dxe6 Bxe6 26.Bxe7 Rf2 wins but less convincingly, and 22...Bf3 23.Qe6+ is similar)

23.Qg2 (to cover c2, otherwise 23...Qg6+ is deadly)

23...Bxd1 24.Bxb4 Qxd4! and White has to lose the queen to escape mate: 25.Kc1 Qa1+ 26.Kd2 Qxa2+ etc

Oct-09-08  kirchhoff: I guess I got it today. I chose Bxg4 with White responding with 22. Kc1 (Qxb4 loses to Q-g6+, K-a1 loses to B-f5 and there is no safe square for the White queen after N-c2+, and I didn't consider Bxb4 since that loses the queen.) Then 23. B-f5 Q-g2 24. N-a2+ K-d2, 25. Q-b4+ K-e3, 26. Qb3+ and white starts losing material. I enojyed this one.
Oct-09-08  5hrsolver: 21...Bxg4 opens all lines of attack for black. Took me less than 5 hrs for this one. I wonder what friday might bring.
Oct-09-08  chopin4525: <newzild: I missed this too.

I saw the same variation as Dzechiel - 1...Nxd5, when 2.Qxd5 runs into 2...Be6 followed by 3...Bxb3.

Maybe "our" 1...Nxd5 move is okay? Any computer analysis would be more than welcome...>

Here is Rybka analysis
1: Tolush - N Kopilov, Leningrad 1954


click for larger view

Analysis by Rybka

23...Qc6 24.d5 Qd7 25.Bc3 Bxg4 26.Bxg7 Qf5+ 27.Ka1 Bxe2 28.Qxa3 Rf7 29.Bc3 Bxd1 30.Rxd1 (2.35) Depth: 21 00:14:57 105mN

Oct-09-08
Premium Chessgames Member
  chrisowen: Interesting game. Within twenty moves white has a tactically superior position and 20. Rc1 would've sealed it. Instead Ne2 allows 0-0 and black escapes.
Oct-09-08  Patriot: I completely missed this. I tried to follow the forcing lines by looking at all checks, captures, and threats. But after 21...Bxg4 22.Qxg4 I couldn't see the follow-up 22...Qg6+ for whatever reason--the only candidate that makes Bxg4 worth considering.

21...Nxa2 seems no good after the obvious 22.Kxa2 and 22...Qxb3+?? 23.Kxb3 and black has no follow-up.

21...Nxd5 22.Qxd5+ Be6 23.Qc5 is white saying "I'm up a piece so let's trade queens!"

21...Bf5 22.gxf5 and now what? So then I considered 21...h5 to decoy the pawn on g4, but the simple 22.h3 is good enough.

21...Rf4 22.Nxf4 seems to do nothing but lose the exchange and then some.

At this point I threw in the towel since I spent enough time on it.

What I find most interesting about these positions is that they have a "chain of events"--checks, captures, or threats on the next move that make a sacrifice, for example, worth looking at. So if you are considering a sacrifice and the chain is broken before gaining back material or checkmating, then the line is most likely bad.

Oct-09-08
Premium Chessgames Member
  johnlspouge: Thursday (Medium):

Tolush vs N Kopilov, 1954 (21?)

Black to play and win.

Material: B for R+P. The White K has 2 legal moves, both dark squares on the back rank. The Black Pa3 take one dark square on the 2-nd rank from Kb1; Nb4, one light square. The Black Qb6 and Bd7 have pressure on Pd4. The Black Rf8 has an open file, although all its invasion points are guarded. The White Kb1 shares a file with the Black Qb6 and the White Qe4. Only the Black Bc8 requires activation.

Candidates (21): Nxa2, Rf3, Bxg4

21Bxg4, threatening

(A) 22Bf5 pinning Qe4 to Kb1 or

(B) 22Bf3 forking Qe4 and Rh1

White can accept the sacrifice but runs into a cousin of Philidor's Legacy:

(1) 22.Qxg4 Qg6+ 25.Ka1 [Kc1 Qc2#]

25Nc2+ 26.Kb1 Nxe1+ 27.Ka1 [Kc1 Qc2#]

27Nc2+ 28.Kb1 Ne3+ 27.Ka1 [Kc1 Qc2#]

25Nxg4

Black has Q+B for R.

White can decline the sacrifice. To avoid the double threat, he must move his Qe4, but to avoid the variations above must neutralize the b1-h7 diagonal by blocking it:

(2) 22.Qe3 Rf3 23.Qd2 [Qxf3 loses] Bf5+ 24.Ka1 [Kc1 Qc7+]

24Nc2+ 25.Kb1 Rxb3+ 26.axb3 [Kc1 Rb1#] Qxb3+ 27.Kc1 Qb2#

Oct-09-08
Premium Chessgames Member
  stoy: Kopilov also beat Botvinnik in a dutch: game 35 or 38. They are the same game. Why does he have so few games in the database? Thanks to anybody who can tell us.
Oct-09-08  The Rocket: this was a bit difficult at first but when you see that theres a very good pawn at a3 and a knight at b4 suddenly I realised that If I can check the white king I win and by "sacking the bishop" the queen cant take it because of queen g6 + ! leading to king a1, Knight c2+!king b1 knight e3+ and the white queen is dead!.

I actually thought that white would take the bishop after yesterday puzzles weak defence from the loser of the game but of course the response from white here also loses.

Oct-09-08  YouRang: Well, I solved this one in a rather unusual way. I spotted the lovely queen-pin ...Bf5 right away. I also noticed that it didn't work because of the pawn on g4.

I saw no good way to make the queen-pin threat work except to take the pawn: 21...Bxg4!, which of course threatens 22...Bf5, winning the queen. So, I am forcing black's hand here, but does it do me any good if 22.Qxg4 ?

Without seeing the winning idea, I just started looking at moves that I could now make that I couldn't make while the white queen was on e4. That is, I just assumed that deflecting the queen was part of the plan.

Before long, I noticed that, yes, I now have 22...Qg6+, which threatens mate in a manner that white can do little about. Of course, 23.Kc1 Qc2# is out, but 23.Ka1 Nc2+ 24.Kb1 Ne3+ wins the queen.

Okay, I didn't look at many alternatives to 22.Qxg4, but I was satisfied that white couldn't take it, and I was pretty satisfied that white had to lose the queen (one way or another) to avoid mate.

Oct-09-08  The Rocket: This puzzle is a good lesson about tactical play, you search for a good attack.. and even though your opponent prevents it you calculate what happens if you remove the defender! even with a piece such as in this case.

You have to think "outside the box" to become strong tactically sometimes concidering every possible move to eventually find the right one.

Though at medium level this puzzle required zero calulation but instead imagination.

Oct-09-08  cydmd: I think a have a shorter line for the main variation

21... Bxg4 22.Qxg4 Qg6+ 23.Ka1 Nc2+ 24.Kb1 Nxd4+ 25.Ka1 Nc2dbl+ 26.Kb1 Nb4+ 27.Rd3 Qxd3+ 28.Rc1 Qc2#

I didn't check it. Anything wrong?

Oct-09-08  VooDooMoves: I too looked at 21...Nxd5 to clear the b-file and to bring the bishop in with tempo. Got excited when I saw 22. Qxd5+ Be6 23. Qe4 Bxb3 24. axb3 Qxb3+ and mate next move. Got bummed when I saw 23. Qc5 :(
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