Tuesday, October 6, 2020

New

 


JG, the New Type of Game & of Composition: the Requirements to Win 

 

This my chess research work including my game of a new type (I have played it as White) against the very strong level (“25 ply”) of the famous chess engine ‘Komodo 10’ (any other engine or person could be my 1st opponent instead of it) isn’t only for experts of Jerome Gambit (JG) theory. But it is based on “a strong theory of this theoretically weak gambit”. 

I invented requirements for this game (the attractive limits for a usual game) and asked my dear friend Rick Kennedy (who has ‘Komodo 10’ and who agreed kindly to be its operator here) to submit ‘Komodo 10’ as Black to them. They are here (the term ‘a very strong move’ is about chess theory which knows no requirements): 

 

1. The game starts from the initial position of the Giuoco Piano (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5), where White makes an incorrect sacrifice of a piece by the 4th move. 

2. During the whole opening stage (WOS) Black makes very strong moves only. 

3. During WOS Black chooses the very strong move only, which makes Black’s material advantage maximum, can’t get a Black’s piece without an effective protection at once or as a result of a forced sequence of moves, and can’t make it beaten this moment.  

4. After the end of WOS Black accepts White’s 1st sacrifice. 

 

The points 1-3 create no problem for Black using a theory. This game of a new type has had the following moves (Rick substituted engine’s move 12…Bd4-+: among all possible 12th moves only 12…Bxb4?? doesn’t break above sum of requirements unknown to engines): 

 

Bukayev Yury  -  ‘Komodo 10’ [“25 ply”] (by correspondence, 2020)  

 

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 (6…Kf8 etc. break the point 3) 7.Qf5+ Kd6 8.f4 Qh4+ (8Nc6 etc. break the point 3) 9.g3 Qf6 (9Nf3+ 10.KfQh6 and 10…Ne7 11.e5+ Kc6 12.Qe4+ d5 break the point 3) 10.fxe5+ Qxe5 11.Qxe5+ Kxe5 (the opening stage finished) 12.b4 Bxb4 13.Bb2+ Kxe4 14.Bxg7, and White won. In accordance with above points there were only four alternatives for Black during this game: 8…Qf6(1), 8…Qh4+ 9.g3 Qe7(2), 8…Qe7(3), 8…Qe8(4)White wins analogously here. The move 8…Bd4 isn’t an effective protection of the Knight: 9.fxe5+ Bxe5?? 10.d4 Bf6 11.e5+, so it breaks the point 3.  

 

In a usual chess game the 12th Black’s move of the above game (and the same move in the analogous position of the above 1st alternative for Black) formed the position of the Bona Fide Master Attack as a result of a rearrangement of moves (see my analyses published 24.08.2020 on Rick’s blog on JG etc.). It can be added, this position and the analogous 1st alternative became more known to the world due to GM Hikaru Nakamura’s blitz checkmate win over GM Dmitrij Kollars on chess.com (28.08.2020) reflected in popularizing analytical videos by Mr. Nakamura (FIDE Blitz Rank #1): ‘The Jerome is Over Powered Actually’, ‘Honor The Jerome!! <…>’ (with IM Levy Rozman) etc., which were published during a month. Mr. Kollars saw this trap in time and played 12…Bd4, his mistakes were among his further moves only.   

Of course, I have calculated all necessary sequences of moves before the beginning of my game against ‘Komodo 10’, and I couldn’t win only in the case of my making of a wrong move.  

Finally, this my game of a new type created my invention of the related chess composition (chess problem) of a new type. Thus, its position for solving is the initial position of the Giuoco Piano, and its question is: “What is the incorrect sacrifice by White’s next move, which can lead to White’s win if Black is submitted to the following requirements: <…[the above requirements no.2-4 – Yury Bukayev]…>?”     

 

© 2020 Yury V. Bukayev (Copyright © Bukayev Yury Vyacheslavovich 2020). All rights reserved.  

[A legal using is permitted.]  

Monday, October 5, 2020

Jerome Gambit: A Lot of Excitement


Here we have another Jerome Gambit game where White keeps his mind on attacking the enemy King, even at the cost of more material. He takes risks in positions where either he or his opponent can escape into a draw - but neither of them want to. White pushes onward - a
s Canadian GM Aman Hambleton says in his Jerome Gambit videothat's what Jerome would have wanted.

There is a lot of exctement in this 10 minute game!

LetsJeromeGambit - existanz

10 0 blitz, Chess.com, 2020


1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 


4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 


7.Qf5+ Kd6 8.f4 Qe7 9.b4 

LetsJeromeGambit has reached this position before. See LetsJeromeGambit - kochikegabil, 10 0 blitz, Chess.com, 2020 (1-0, 15). This time, his opponent takes the offered pawn.

9...Bxb4 10.fxe5+ 

For 10.Bb2 see  "Jerome Gambit: Article".

10...Kc6 11.c3 Ba5 12.O-O b6 


Black provides for some safety for his King. This is a good idea, as he proceeds to grab a handful of pawns - putting his monarch in danger along the way.

13.Ba3 Qe6 14.Qf8 Qxe5 15.d4 Qxe4 16.Nd2 Qe3+ 17.Rf2 Bxc3 18.Nf1 Qxd4 



Wow. White's "Jerome pawns" are gone. Black is ahead a piece and 3 pawns. This is a blitz game, however, and, as we shall see, White is just getting warmed up.

19.Qf3+ d5 20.Rc1 Kb7 21.Rxc3 Nf6 22.Bb2 Qb4 


Black has returned a piece, and castled-by-hand on the Queenside - both very reasonable ideas.

White's development is looking threatening, however, and Komodo 10 rates Black only about a pawn ahead. Time to stir things up.

23.Rfc2 c5 24.Rxc5 bxc5 25.Bxf6 


25...gxf6  

This move is perfectly natural, but Black should have asked himself why his opponent was willing to sacrifice his Rook. The safe move, was 25...Qe4 with an advantage. 

26.Qxd5+ 

White is down a Rook and a pawn, but Komodo 10 rates the position equal. Can you see why? With a draw in hand, White continues his aggression.

26...Kb6 27.Qd6+ Kb5 


Brave, but he might have taken the practical course 27...Kb7 28.Qd5+ Ka6 29.Qxa8 Qb7 30.Qxb7+ Bxb7 31.Rxc5 with an even endgame. 

28.a4+ 

The only move, but it proves to be a saving one.

28...Kxa4 

Black avoids 2 nasty alternatives:

28...Ka5 29.Rxc5+ and Black will lose his Queen; and

28...Qxa4 29.Rxc5+ Kb4 30.Qd4+ Ka3 31.Qa1+ Kb3 32.Nd2+ Kb4 33.Qc3 checkmate.

29.Rxc5 Rb8  


Treating the position like it was a normal one, where he is happily a Rook and a pawn ahead. He probably should have played the surprising 29...Rd8, when White should then take the draw by repetition starting with 30.Qc6+ instead of swapping Rooks, i.e. 30.Qxd8 Qxc5+. 

30.Qd1+ Ka3 31.Qc1+ Ka4 32.Rc4 a5  33.Rxb4+ axb4 


With a Queen and a pawn against two Rooks, White has established material balance. Komodo 10 rates White a little better, perhaps because the Queen will be able to snatch a pawn or two.

The position remains quite complicated, however.

34.Qc6+ Ka3 35.Qxf6 Bb7 36.Qa1+ Kb3 37.Nd2+ Kc2 


Black trusts in his b-pawn and is happy to have his King around to escort it to the Queening square.

From a practical point of view, White probably can win the pawn, but the complications should be enough to force one player or the other to look for a draw - unless the clock intervenes, first.

38.Nc4 Ra8

Instead, Komodo 10 recommends 38...Rhd8 39.Qb2+ Kd3 40.Ne5+ Ke3 41.Ng4+ Kd3 42.Qb3+ Kd2 43.Qxb4+ Kc2 44.Qa4+ Kb2 45.Qb4+ Kc2 and a resolution is still a long way off.

39.Qb2+ Black resigned


Why did Black resign? 

After 39...Kd3 (39...Kd2 40.Qd2#) 40.Qb3+ Kd4 (40...Ke2 41.Qc2+ Ke1 42.Qd2#) 41.Qxb4 and White's threats of discovered check or Knight forks will win him an exchange.



Sunday, October 4, 2020

Jerome Gambit: There Is Danger Out There


Attack the enemy King! That is the main idea behind the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+), and the online player LetsJeromeGambit understands that very well. 

The following game is one of a handful he has sent, and it gives the message clearly to Black's King: There Is Danger Out There.


LetsJeromeGambit - kochikegabil

10 0 blitz, Chess.com, 2020

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 


7.Qf5+ Kd6 8.f4 Qe7 

An interesting alternative to 8...Qf6, although the game would transpose after 9.fxe5+ Qxe5.

9.b4 


b2-b4 without c2-c3 has been played occasionally in Jerome Gambit games, going back at least as far as Jerome - Norton, correspondence, 1876, (0-1, 42), but not in this particular position.

9...Bb6

Timid, allowing White to fianchetto his Bishop for free.   

LetsJeromeGambit has also seen 9...Bxb4, which we will cover in a later post. 

10.Bb2 Kc6 

Fleeing possible checks delivered at e5, but there is danger out there.

11.b5+ Kxb5 


This capture feels unsafe, but 
11...Kc5 would lose the Queen to 12.Ba3+, while 11...Kd6 would lead to 12.Bxe5+ Kc5 13.Bd6+ Kxd6 14.Qd5 checkmate. 

12.fxe5 d6  

Black attacks the White Queen and tries to open an escape route for his King. The computer suggests that 12...Kc6 is really the only move here, and that after 13.Nc3 Ba5 14.e6 Qc5 15.Qxc5+ Kxc5 16.Na4+ Kb4 17.Bxg7 Kxa4 18.Rf1 dxe6 19.Bxh8 the game would be level, White's extra Rook and pawn balancing Black's extra Bishop and Knight.

I do not know if LetsJeromeGambit had that all figured out, but if he didn't, his intuition behind the sacrifice of the b-pawn was solid: at worse, and even game, at best, a checkmate.

13.a4+ Kc6 14.e6 a6 


Stopping one threat, but missing the other. He had to get rid of the Bishop that was crowding his King, with 14...Bf2+, although 15.Kxf2 a6 16.Qd5+ Kb6 17.Qd4+ c5 18.Qxg7 means the loss of more material.

15.Qd5 checkmate