Showing posts with label Lakritzl. Show all posts
Showing posts with label Lakritzl. Show all posts

Monday, November 14, 2011

Something To Watch Out For


It is so much easier in a scary movie: you know that you are moving into danger when the background music becomes ominous, perhaps the screeching of violins...

In a chess game, especially when playing a dubious opening like the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) it is important to be aware of dangerous themes.

Darthnik - spenjch
blitz, FICS, 2011

1.e4 e5 2.Bc4 Nc6 3.Nf3 Bc5


Already we have some foreshadowing with 3...h6 4.d4 exd4 5.Bxf7+ Kxf7 6.e5 Qe8 7.Qd3 Nxe5 8.Qxd4 Nxf3+ 9.Kf1 Nxd4 White resigned, Benschatko - Lakritzl, FICS, 2006; and


3...Nf6 4.Nc3 Bc5 5.Bxf7+ Kxf7 6.Nxe5+ Nxe5 7.d4 Bxd4 8.Qxd4 d6 9.Bg5 h6 10.Bxf6 Qxf6 11.Nd5 Nf3+ White resigned, gjtlsdnr - silvalgo, FICS 2011.

4.Bxf7+


4...Kxf7 5.Nxe5+ Nxe5 6.d4 Bxd4 7.Qxd4 Qf6

 Even here, the danger begins to appear: 7...d6 8.f4 Qh4+ 9.g3 Nf3+ White resigned, Cradle - Foom, FICS, 2008 and Bevs - LordLucika, FICS, 2009.

8.f4 Qh4+

Or simply 8...Nf3+ White resigned, as in ainafets - Papaflesas, FICS, 2007 and stemplarv - KIAUA, FICS, 2007; or further 9.gxf3 Qxd4 White resigned, yorgos - Kompete, FICS, 2009.

9.g3 Nf3+ White resigned




Danger is everywhere, and we must learn to recognize it.

Friday, February 4, 2011

Struggling

I have seen games where a player gives odds of pawn, Knight, Rook or Queen and then wins brilliantly. I do not know how many games where the odds-acceptor's wins have been published. Here is one I gave "Jerome Gambit odds" and lost.


 perrypawnpusher  - pblond
blitz, FICS, 2011

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6


The Semi-Italian Opening.

4.0-0 Bc5 5.Bxf7+


The Semi-Italian Jerome Gambit.

Of course, White does not have to sacrifice. He can keep a small edge with 5.c3 d6 6.d4 exd4 7.cxd4 Bb6 8.Nc3 Nf6 9.h3 0-0.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Ke6


I have played this position a number of times. The deeper I get into the game, the more it feels like I am walking through a junkyard, and I keep expecting to see myself amongst the wrecks.

8.Qf5+ Kd6 9.d4 Bxd4

The capture seems best, but has not always been played:

9...Qf6 10.dxe5+ Qxe5 11.Rd1+ (11.Bf4 Black resigned, perrypawnpusher - joejox, FICS 2009) 11...Bd4 12.Qf8+ Ke6 13.Qe8+ Kf6 14.Qf8+ Ke6 15.Qe8+ Kf6 draw, perrypawnpusher - Joyus, blitz, FICS, 2007 ;

9...Ne7 10.Qxe5+ Kc6 11.Qxc5 checkmate, perrypawnpusher - GabrielH, blitz, FICS, 2010 & perrypawnpusher - StockholmMoskva, blitz, FICS, 2010.

10.Rd1 c5


A reasonable move, but not actually necessary, as my opponent showed in perrypawnpusher - richardachatz, blitz, FICS, 2010 (1/2-1/2, 71) by playing 10...Ke7. Remember, Black is two pieces up. In that game I was lucky to swindle my way to a draw.

Also good for Black is 10...Qf6 11.Rxd4+ Ke7.

11.c3 Ne7

12.Qh3

I have played this move successfully before, but I think that 12.Qh5 as in perrypawnpusher - Lakritzl, blitz, FICS, 2009 (1-0, 20) and perrypawnpusher - tuffmom, blitz, FICS, 2010 (1-0, 26) or 12.Qf4 as in perrypawnpusher - Xasquete, blitz, FICS, 2010 (1-0, 46) might be better.

In truth, all still leave White struggling for even equality.

12...Kc7

Stepping out of the pin, although also good for Black was 12...N7g6 as in perrypawnpusher - Repunante, blitz, FICS, 2010 (1-0, 17). [Hmmm... doesn't look like I've posted this game here yet - RK]

13.cxd4 cxd4

Or 13...d6 14.Qc3 Nd7 15.dxc5 Nxc5 16.Bf4 b6 17.b4 Kc6 Black resigned, perrypawnpusher - tuffmom, blitz, FICS, 2010.

14.Rxd4 d6

perrypawnpusher - Jantra, blitz, FICS, 2010 continued with 14...N7c6 (1-0, 26) Black probably should have played 14...Kb8 first.

15.Qc3+ N7c6 16.Bf4


After the game Rybka recommended 16.f4, giving Black an edge after 16...Nf7 17.Be3 g5

16...Qf6

Black's defense is now solidly in place. He is even threatening to win the exchange after 17.Bg3 Nf3+ 18.gxf3 Qxd4.

17.Bxe5 Qxe5 18.Rc4 Be6


Black is ready to finish up.

19.Qxe5 dxe5 20.Rc1 Rac8 21.b4


Hope springs eternal, but Black is even able to castle-by-hand on the Queenside. White has nothing for his sacrificed piece (the extra pawn is meaningless).

21...Kb8 22.Nd2 Nd4 23.a4 Ne2+ White resigned


Whew! This was a very good game by pblond, and it certainly shows what a struggle the Jerome Gambit can sometimes deliver – for White.

Friday, November 5, 2010

Walking Through A Junkyard

Giving "Jerome Gambit odds" can feel like a walk through a junkyard. You pass wreck after wreck and your only hope is that you will find something to get you out of there.

perrypawnpusher - Jantra
blitz, FICS, 2010

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6

The Semi-Italian Opening.


4.0-0 Bc5 5.Bxf7+


The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Ke6


8.Qf5+

The computer-recommended follow-up is 8.Qh3+ Ke7 9.Qc3 d6 10.d4 Bxd4 11.Qxd4 Nf6 12.Nc3 although this leads to a position that is almost identical to a position from the Semi-Italian Four Knights Jerome Gambit: Black's King is on e7 instead of f7, and it is his move instead of White's.

Amusingly, at this point, until about a depth of 12 moves, Fritz8 recommends the next two moves for Black to be ...Re8 and ...Kf7, which would be identical to the Semi-Italian Four Knight's Jerome Gambit, except that the recommended move for White in the interim is Bf4, not f2-f4.

8...Kd6 9.d4

Moving the pawn directly seems better than preparing for it, as in prettyhip1 - cubs0_0, GameKnot.com, 2007: 9.Rd1 Ne7 10.Qh5 g6 11.Qh3 Bd4 12.Qa3+ Bc5 13.b4 Bd4 14.c3 Bxf2+ 15.Kxf2 Rf8+ 16.Ke3 White resigned.

9...Bxd4


The right idea. Problems came with

9...Qf6 10.dxe5+ Qxe5 11.Rd1+ (11.Bf4 Black resigned, perrypawnpusher - joejox, blitz, FICS, 2009) 11...Bd4 12.Qf8+ Ke6 13.Qe8+ Kf6 14.Qf8+ Ke6 15.Qe8+ Kf6 Game drawn by mutual agreement, perrypawnpusher - Joyus, blitz, FICS, 2007; and

9...Ne7 10.Qxe5+ Kc6 11.Qxc5 checkmate, perrypawnpusher - GabrielH, blitz, FICS, 2010 & perrypawnpusher - StockholmMoskva, blitz, FICS, 2010.

10.Rd1 c5


Black did better with 10...Ke7 11.Rxd4 d6 after which only an endgame swindle saved me in perrypawnpusher - richardachatz, blitz, FICS, 2010 (½-½, 71). Although the text is still good for the second player, richardachatz' King move "abandoning" the Bishop on d4 is also to be considered.

11.c3 Ne7

This is okay, but again 11...Ke7 could be considered.

12.Qh3


I was surprised, but also amused, to be a dozen moves into this offbeat line (rightly or wrongly) and still be in "book". It is sometimes very helpful to review and analyze games for this blog! 

This Queen retreat is comparable with the others that I had played previously:

12.Qh5 Qe8 (12...Kc7 13.cxd4 cxd4 14.Qxe5+ d6 15.Qxd4 Nc6 16.Qxg7+ Bd7 17.Bf4 Rg8 18.Qxh6 Qe7 19.Bxd6+ Qxd6 20.Qxd6+ Black resigned, perrypawnpusher - Lakritzl, blitz, FICS, 2009) 13.cxd4 cxd4 14.Rxd4+ Kc7 15.Qxe5+ Kd8 16.Nc3 Nc6 17.Qxe8+ Rxe8 18.Rd6 b6 19.Bf4 Bb7 20.Rad1 Re7 21.e5 Nxe5 22.Bxe5 Rxe5 23.Rxd7+ Ke8 24.Rxb7 Rd8 25.Rxd8+ Kxd8 26.Kf1 Black resigned, perrypawnpusher - tuffmom, FICS, 2010;

12.Qf4 Qf8 13.cxd4 Qxf4 14.Bxf4 cxd4 15.Rxd4+ Kc5 16.Bxe5 Nc6 17.Rd5+ Kb6 18.Na3 Nxe5 19.Rxe5 d6 20.Re7 Bg4 21.f3 Bh5 22.Rc1 Rhe8 23.Rcc7 Rxe7 24.Rxe7 Rc8 25.Rxg7 Rc1+ 26.Kf2 Ra1 27.Rh7 Rxa2 28.Kg3 a5 29.Rxh6 Bf7 30.Rxd6+ Kc5 31.Rd2 b5 32.Kf2 b4 33.Nb1 Ra1 34.Rc2+ Kd4 35.Rd2+ Kc5 36.Rc2+ Kd4 37.Nd2 Kd3 38.Rc7 Kxd2 39.Rxf7 Kc2 40.e5 b3 41.e6 Kxb2 42.e7 Kc1 43.e8Q Ra2+ 44.Kg3 b2 45.Rc7+ Kb1 46.Qe1 checkmate, perrypawnpusher - Xasquete, blitz, FICS, 2010.

12...Kc7


The text is an improvement on 12...Qb6 13.cxd4 cxd4 14.Qa3+ Ke6 15.f4 N5c6 16.f5+ Kf7 17.Nd2 Re8 18.Nc4 Qc7 19.Nd6+ Kf8 20.Nxe8 Kxe8 21.Qf3 Ne5 22.Qg3 Kf8 23.Bf4 d6 24.Rac1 Qa5 25.f6 N7g6 26.Bxe5 Qxe5 27.Qxg6 Be6 28.Qxg7+ Ke8 29.Qe7 checkmate, joev6225 - liverpool, GameKnot.com, 2006.

13.cxd4 cxd4



Black is still better, despite his shaky King, because of his extra piece.

Leading only to equality was 13...d6, although things quickly deteriorated: 14.Qc3 Nd7 15.dxc5 Nxc5 16.Bf4 b6 17.b4 Kc6 Black resigned, perrypawnpusher - tuffmom, blitz, FICS, 2010

14.Rxd4 N7c6
15.Qc3 Qf6


16.f4

Thematic, but wrong, as it should lose the exchange. I should have retreated the Rook first.

16...Nf7

My opponent missed 16...Nf3+ 17.Qxf3 Qxd4+ trading his Knight for my Rook. I think he was getting tired of all the attention that I was paying to his King.

17.e5 Qe7 18.b4 d6


Deciding to return the gambitted piece at precisely the point where his King might have begun to feel relief with 18...Kb8.

19.b5 dxe5 20.fxe5



20...Nfxe5

An unfortunate slip. After the game Rybka gave 20...Rd8 21.bxc6 Rxd4 22.Qxd4 Qd8 23.Qc3 bxc6 24.Nd2 Be6 25.Bb2 Qd5 26.Nb3 Rb8 27.Rc1 Rb6 and White is only a bit better (King safety)





analysis diagram





21.bxc6 Nxc6 22.Bf4+ Kb6 23.Qb3+ Ka6 24.Ra4+ Na5 25.Qc4+ b5 26.Qc6 checkmate

How odd that three Rooks, a Bishop and a Knight look on, uninvolved...

Monday, July 19, 2010

Other than that, Mrs. Lincoln, how was the play...?

If you overlook the fact that I hung my Queen on move 13 in the following game – and you might as well, since both my opponent and I did, too – it's a pretty interesting game in a pretty interesting variation.

Even if that 13th move wasn't pretty at all.

perrypawnpusher - tuffmom
blitz, FICS, 2010

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6


The Semi-Italian Opening.

4.0-0 Bc5 5.Bxf7+


The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Ke6


8.Qf5+ Kd6 9.d4 Bxd4


Not 9...Qf6 10.dxe5+ Qxe5 11.Rd1+ (11.Bf4 Black resigned, perrypawnpusher - joejox, blitz, FICS, 2009) 11...Bd4 12.Qf8+ Ke6 13.Qe8+ Kf6 14.Qf8+ Ke6 15.Qe8+ Kf6 Game drawn by mutual agreement, perrypawnpusher - Joyus, blitz, FICS, 2007;


Nor 9...Ne7 10.Qxe5+ Kc6 11.Qxc5 checkmate, perrypawnpusher - GabrielH, blitz, FICS, 2010; and perrypawnpusher - StockholmMoskva, blitz, FICS, 2010.

10.Rd1 c5


11.c3 Ne7 12.Qh5

The Queen can go elsewhere: 12.Qf4 Qf8 13.cxd4 Qxf4 14.Bxf4 cxd4 15.Rxd4+ Kc5 16.Bxe5 Nc6 17.Rd5+ Kb6 18.Na3 Nxe5 19.Rxe5 d6 20.Re7 Bg4 21.f3 Bh5 22.Rc1 Rhe8 23.Rcc7 Rxe7 24.Rxe7 Rc8 25.Rxg7 Rc1+ 26.Kf2 Ra1 27.Rh7 Rxa2 28.Kg3 a5 29.Rxh6 Bf7 30.Rxd6+ Kc5 31.Rd2 b5 32.Kf2 b4 33.Nb1 Ra1 34.Rc2+ Kd4 35.Rd2+ Kc5 36.Rc2+ Kd4 37.Nd2 Kd3 38.Rc7 Kxd2 39.Rxf7 Kc2 40.e5 b3 41.e6 Kxb2 42.e7 Kc1 43.e8Q Ra2+ 44.Kg3 b2 45.Rc7+ Kb1 46.Qe1 checkmate, perrypawnpusher - Xasquete, blitz, FICS, 2010; or

12.Qh3 Qb6 13.cxd4 cxd4 14.Qa3+ Ke6 15.f4 N5c6 16.f5+ Kf7 17.Nd2 Re8 18.Nc4 Qc7 19.Nd6+ Kf8 20.Nxe8 Kxe8 21.Qf3 Ne5 22.Qg3 Kf8 23.Bf4 d6 24.Rac1 Qa5 25.f6 N7g6 26.Bxe5 Qxe5 27.Qxg6 Be6 28.Qxg7+ Ke8 29.Qe7 checkmate, joev6225 - liverpool, GameKnot.com, 2006.

12...Qe8


Stronger than: 12...Kc7 13.cxd4 cxd4 14.Qxe5+ d6 15.Qxd4 Nc6 16.Qxg7+ Bd7 17.Bf4 Rg8 18.Qxh6 Qe7 19.Bxd6+ Qxd6 20.Qxd6+ Black resigned, perrypawnpusher - Lakritzl, blitz, FICS, 2009.

13.cxd4

Ooops...

13...cxd4

Double oops...

14.Rxd4+


14...Kc7

As uncomfortable as it looks, Black's King needed to take shelter at e6 where he could protect the Knight at e5. It is not a good time for Black to return the sacrificed piece.

15.Qxe5+ Kd8 16.Nc3 Nc6 17.Qxe8+ Rxe8


18.Rd6 b6 19.Bf4 Bb7 20.Rad1 Re7 21.e5

Stronger, maintaining more of the bind, was 21.Rg6.


21...Nxe5

An oversight.

22.Bxe5 Rxe5 23.Rxd7+ Ke8 24.Rxb7 Rd8 25.Rxd8+ Kxd8 26.Kf1 Black resigned



Sunday, May 30, 2010

Enjoyment



I play the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) and its variants because the games usually give me a lot of enjoyment. That's about it.



perrypawnpusher - StockholmMoskva
blitz FICS, 2010

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6


The Semi-Italian Opening.

4.0-0 Bc5 5.Bxf7+


The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Ke6 8.Qf5+


This is similar to play in the regular Jerome Gambit, although the computer-recommended follow-up is 8.Qh3+ Ke7 9.Qc3 d6 10.d4 Bxd4 11.Qxd4 Nf6 12.Nc3,




analysis diagram







8...Kd6 9.d4 Ne7


This seems to be an instinctive reaction: Black is two pieces ahead, and all he needs to do is chase that nasty Queen away...

An earlier game of mine continued, instead: 9...Bxd4 10.Rd1 c5 11.c3 Ne7 12.Qh5 Kc7 13.cxd4 cxd4 14.Qxe5+ d6 15.Qxd4 Nc6 16.Qxg7+ Bd7 17.Bf4 Rg8 18.Qxh6 Qe7 19.Bxd6+ Qxd6 20.Qxd6+ Black resigned, perrypawnpusher - Lakritzl, blitz FICS, 2009.

10.Qxe5+ Kc6 11.Qxc5 checkmate


Less than a week later, I again ignored the computer recommendation for White for move 8, and played the same game against GabrielH.

It may take a while (and perhaps a loss) before I give up 8.Qf5+.

Tuesday, January 12, 2010

Ending in the Wilderness


I continue to be amazed at how much chess "education" can be found in my Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) games, when I play them over afterwards. I guess the use of an oft-refuted opening does not negate interesting problems in the middle game and end game (if I survive that long, of course). 

perrypawnpusher - Xasquete
blitz FICS, 2010

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6



The Semi-Italian Opening.

4.O-O Bc5 5.Bxf7+



The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Ke6


This position is similar to one of the main lines in the Jerome Gambit, with 0-0 added for White and ...h7-h6 added for Black.

I think the King move might be a bit stronger than ...Ne5-g6, but it leads to some uncomfortable play for the defender.

Chess, well-known as a "thinking" game, is also a "feeling" game. Grandmasters may look at a particular move because their highly developed intuition suggests that it "feels" right. Club players are more likely to avoid certain lines because they "feel" dangerous or scary.

8.Qf5+ Kd6 9.d4


This move is most often played, although 9.Rd1 was tried in prettyhip1 - cubs0_0, GameKnot, 2007: 9.Rd1 Ne7 10.Qh5 g6 11.Qh3 Bd4 12.Qa3+ Bc5 13.b4 Bd4 14.c3 Bxf2+ 15.Kxf2 Rf8+ 16.Ke3 White resigned.

White's play can be improved, but 9...Ne7 is a good response to 9...Rd1.

9...Bxd4 10.Rd1 c5



Two pieces ahead, Black must be better. As is typical for the Jerome Gambit, however, White has targets: in this case, the Bishop on d4 and the King on d6.

11.c3 Ne7 12.Qf4



Alternate Queen placements were seen in

joev6225 - liverpool, GameKnot, 2006: 12.Qh3 Qb6 13.cxd4 cxd4 14.Qa3+ Ke6 15.f4 N5c6 16.f5+ Kf7 17.Nd2 Re8 18.Nc4 Qc7 19.Nd6+ Kf8 20.Nxe8 Kxe8 21.Qf3 Ne5 22.Qg3 Kf8 23.Bf4 d6 24.Rac1 Qa5 25.f6 N7g6 26.Bxe5 Qxe5 27.Qxg6 Be6 28.Qxg7+ Ke8 29.Qe7 checkmate

perrypawnpusher - Lakritzl, blitz FICS, 2009: 12.Qh5 Kc7 13.cxd4 cxd4 14.Qxe5+ d6 15.Qxd4 Nc6 16.Qxg7+ Bd7 17.Bf4 Rg8 18.Qxh6 Qe7 19.Bxd6+ Qxd6 20.Qxd6+ Black resigned

12...Qf8

This is a nifty defense that addresses both Black's strategic and emotional needs (even if 12...N7c6 is a bit stronger). With Queens off the board, how unsafe can the King be?


13.cxd4 Qxf4 14.Bxf4

Too routine. Better was 14.dxc5+ first, minimizing Black's advantage.

14...cxd4 15. Rxd4+ Kc5



With 15...Ke6, Xasquete could have made me pay for the above move-order error. Now I get a piece back and have a clear advantage (King safety, ease of development).

16.Bxe5 Nc6 17.Rd5+ Kb6 18.Na3 Nxe5 19.Rxe5 d6



20. Re7 Bg4 21. f3 Bh5 22. Rc1 Rhe8 23. Rcc7 Rxe7 24. Rxe7 Rc8



White's initiative persists.

25. Rxg7 Rc1+ 26. Kf2 Ra1 27. Rh7 Rxa2



I suppose if this were a game between two Grandmasters, the annotator would say "the rest is just a matter of technique." Neither Xasquete nor I are GMs, however.

28.Kg3 a5

Black plans to make the most of his Queenside advantage; the most practical choice.

29.Rxh6 Bf7 30.Rxd6+ Kc5 31.Rd2



Things are going to become interesting as Black works to get (and Queen) a passed pawn. But, certainly my 4 connected passed pawns should count for something?

31... b5 32.Kf2 

After the game, Fritz8 preferred 32.Rc2+ Kb6 33.f4 b4 34.Nb1 a4 35.f5 Ra1 36.Nd2 b3 37.Nxb3 Bxb3 38.Re2, when White has traded his Knight to settle things on the Queenside. The Kingside pawns will win the game.






analysis diagram





32...b4 33.Nb1 Ra1



Here, things get stranger. Fritz8 argues that after the stronger 33...Bb3, White can force a draw by repetition of position – after he sacrifices his Rook and Knight!

The line goes: 33... Bb3 34.Kg3 Ra1 35.Rd3 Kc4 36.Nd2+ Kxd3 37.Nxb3





analysis diagram






37...Rb1 38.e5 Rxb2 39.e6 Rc2 40.f4 a4 41.e7 Rc8 42.f5 axb3






analysis diagram





43.f6 b2 44.f7 b1Q 45.e8Q Qc2 46.Qd7+ etc.






analysis diagram






Wow! I didn't see any of that during the game. Instead, I kept wandering through the wilderness. 

34.Rc2+ Kd4



35. Nd2 Kc5

Here's another line that Fritz8 suggested led to equality: 35...Ke5 36.Rd1 Ba2 37.Nc3 bxc3 38.Rxa1 cxb2 39.Rxa2 b1Q 40.Rxa5+ Ke6 41.Rd5





analysis diagram







Uh, okay, if you say so...

 36. Rc2+ Kd4 37. Nd2 Kd3 38. Rc7



White's play is more active than in the analysis.

38...Kxd2 39. Rxf7 Kc2



The Fritz8 recommendation strangeness continues: "stronger" for Black (but still losing) was 39...Rb1 40.g4 (40.Ra7 Rxb2 41.Rxa5 b3 42.h4 Kc3+ 43.Kg3 Rb1 44.Rc5+ Kb4 45.Rc8 Rg1 46.Rb8+ Kc3 47.f4 b2 48.Rxb2 Kxb2 49.e5.






analysis diagram






40. e5 b3



This finally blows the game open, although I did not realize it at the time. 

41.e6 Kxb2 42.e7 Kc1



42.Rc1 is not much better.

43. e8=Q Ra2+ 44. Kg3 b2 45. Rc7+ Kb1 46.Qe1 checkmate