Jerome Gambit: GameKnot Visit

Every once in a while I stop by the online site GameKnot.com, to see what Jerome Gambit games I can pick up. Here are a couple of quick ones.

gocubs2004 - maleeniets
chrusage's mini-tournament IIII
GameKnot.com, 2005

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4 

The Blackburne Shilling Gambit. Tricky - but White does well as long as he avoids the temptation of 4.Nxe5?!.

4.Bxf7+

The Blackburne Shilling Jerome Gambit. It is quite effective when it comes as a surprise.

4...Kxf7 5.Nxe5+ Ke6 6.c3 Nb5

This is a bit unusual ("book" is 6...Kxe5), but there are 16 previous examples in The Database, where White scores 13 - 3. Since Black's position remains "objectively" better, I suspect the lopsided score in favor of the first player is due to the second players' unfamiliarity with the BSJG.

I think White, in this game, suspects his opponent is adrift, and goes for the jugular.

7.d4 Nd6 8.d5+ Kxe5 9.Qd4 checkmate

Ouch.

byzantine1453 - x-filez
Let's Play Chess
GameKnot.com, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4 4.Bxf7+ 

Here we go again: the Blackburne Shilling Jerome Gambit.

4...Kxf7 5.Nxe5+ Ke6 6.Nc4

Again, this is not main line, but there are 167 games with it in The Database, with White scoring 54%.

6...Nf6 7.c3 Nc6 8.d4 d5 9.e5 dxc4 10.exf6 Kxf6 

Black's King looks a bit exposed, but, at this point, it is on White's shoulders to prove compensation for the sacrificed material.

11.Qf3+ Kg6 12.O-O Bd6 13.Nd2 Rf8 14.Qd5 

The Queen seeks sancturary from the attack by the Rook, but this move brings her into even greater danger.

14...Bxh2+ 15.Kxh2 Qxd5 White resigned

Double ouch.

Jerome Gambit: Over The Rainbow (Part 3)

[continued from previous post]

Wall, Bill - Guest4105968
PlayChess.com, 2018

White's extra pawns give him chances for advantage, but Black's pieces can work together on defense.

This is a game that is much harder to play than analyze.

36...Bd8 37.a3

Patience, or perhaps the clock is beginning to make its appearance. Let Black make the big bold moves, and, perhaps, mistakes.

37...Kf7 38.Qd4 Bf6 39.Qb4 Bh4 40.Qb6 

The Queen creeps around. As long as Black's pieces have to play defense, it causes no harm.

40...Bd8 41.Qa7 Bf6 42.Qg1 Be4 43.a4 

Trying something else before acceding to a draw. 43.c4 was a safe alternative, but giving up the d-pawn is no big deal, as White has things in hand.

43...Bxd5 44.Qg6+ Ke6 45.f5+ 

White's move is another clue that the clocks might be coming into play. He pushes his passed (but blockaded) pawn, bypassing the kind of simple-looking-but-poisonsous move that he has used to win many games - 45.Qd3!?. It looks innocuous, but only 45...Bc6 allows Black to avoid major danger, and the followup, pushing the pawns on the other side of the board, 46.b4 Rg7 47.b5 Bg2 48.a5 Rg4 49.a6 bxa6 50.bxa6 Rxf4 51.Qe2+ Be4 52.a7 looks promising, as well.

45...Ke5 

And now it's time to split the point.

46.Qg3+ Ke4 47.Qg2+ Ke5 48.Qg3+ Ke4 49.Qg2+ Ke5 50.Qg3+

drawn by repetition of position

Whew!

Jerome Gambit: Over The Rainbow (Part 2)

[continued from previous post]

Wall, Bill - Guest4105968
PlayChess.com, 2018

After examining the opening moves (see previous post) I was inclined to simply write "I don't understand the rest of the game" and give the finishing 40 moves. But, let me persist.

11.Qf3+

White wants to avoid any uncovered attack by Black's Bishop on his Queen, with ...d5.

11...Nf6 12.Nc3 Ne6 13.O-O-O 

13...Be5 

Maybe he should have tried 13...Bxc3, disrupting White's Queenside pawns, as 14.bxc3 would be necessary to preserve the e-pawn.

14.Nd5 d6 15.Rhe1 Rf8 

Preparing to castle-by-hand with ...Kg8.

16.g3 g5 

To forestall f2-f4? I suspect the mundane 16...Kg8 was more to the point.

17.Qe3 Bd7 

Stockfish 9 doesn't like this move ( preferring 17...Kg8) and I can sort of understand why, although I never would have found the recommended line over-the-board (although Bill probably would have): 17...Kg8 18.Nxc7!? Nxc7 19.Qxg5+ Kh8 20.f4 Bd4 21.e5!? dxe5 22.fxe5 Ne6!? (Black's strength is in his pieces) 23.Qh4 Nd5 24.Qe4!? Nb6 25. Rxd4 Nxd4 26.Qxd4 Be6 and White's passed pawn is not to be trifled with. 

18.Nxc7!? Nxc7 19.f4 gxf4 20.gxf4 Nfd5 21.exd5 Bf6 22.Qe4 Kg8

The combination has won White a pawn. What next?

23.h4

Of course, now 23...Bxh4? 24.Rh1 would be self-injurious for Black.

Instead of the text move, however, Stockfish 9 suggests 23.Qb4, when the Queen will be able to snap off either the b7 or the d6 pawn, and then pull back to await further developments.

That's one of the problems with computer analysis: when there isn't a tactical strike available, too often it suggests that you bide your time, then take a small nibble, wait some more, then, maybe, take another tiny bite... 

It is easy to see why Bill preferred more direct action.

23...Na6 24.Qg2+ Kh8 

25.c3

Arrrggghh!

Such a practical move.

When I ask the computer for an alternative, it suggests the exchange sacrifice 25.Re6!? Bxe6 26.dxe6 Rae8 27.Rxd6 followed by another one after 27...Be7 - reassuring me that after 28.Qd5!? Bxd6 29.Qxd6 Nxe6!? 30.Qxe6 Rae8 White is winning easily.  

analysis diagram






Looks like a lot more hard work to me.

25...Nc5 26.Re3 Rg8 27.Qf2 Bf5 28.h5 h6 29.Rg1

Bill comes up with an exchange offer, after all. Sacrifices work well when they are disguised as an oversight. Black should not take the bait.

29...Nd3+ 30.Rxd3 Rxg1+ 31.Qxg1 Bxd3 

32.Qg4!?

Taking advantage of the lack of coordination of Black's pieces. But, is it worth trading a Rook for a Knight?

32...Rd8 33.Qe6 Kg7 34.Qe3 Bf5 35.Qxa7 Rd7 

White snarfs a pawn. If this were a Marvel comic book, Black would be yelling "Avengers, assemble!" a his pieces are pulling themselves together again.

36.Qe3

Centralizing his Queen.

It goes, almost without saying, that Stockfish 9 criticizes this good move, suggesting its own version of yelling "Jerome pawns, assemble!" - 36.a4 Be4 37.a5 Re7 38.c4 Kf7 39.Qb6 Rd7 40.Kd2 Bf5 41.b4 Bb2 42.c5 dxc5 43.bxc5 Rxd5+ 44.Ke2 Bd4 45.Qxb7+ Rd7  

analysis diagram






Sure, White's three passed pawns look scary, but his King looks like he is about to volunteer to be a pinata. And White is supposed to volunteer to reach this position?

[to be continued]

Jerome Gambit: Over the Rainbow (Part 1)

Over the years, I have loosely classified Jerome Gambit games by strategy: "White attacks aggressively", "Black counter-attacks aggressively", and "Black counters well, so White adopts a slow, solid, come-get-me approach". That covers a lot of games in The Database.

Then there are games like the following, however, which might as well be classified as "somewhere over the rainbow". 

Wall, Bill - Guest4105968
PlayChess.com, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5. Nxe5+ Ke6

The move appears in 28 games in The Database (updated). It is somewhat understood, after some serious blog coverage, here - the most recent being in another of Bill Wall's games from 2 years ago (see "Jerome Gambit: This Is How It's Done"), where I wrote

This move follows the "psychology" of "If you want me to take the Knight, then I won't take the Knight", but it is simply not a good move. It is relatively rare: The Database has 24 games, with White scoring 65% . 

Still, it is worth knowing the followup, as this "defense" has shown up in the games of Jerome Gambit regulars: blackburne, MrJoker, Petasluk, stretto, UNPREDICTABLE, and ZahariSokolov. I have faced it a couple of times and come away with wins. 

In fact, I have posted a disproportionate number of times on the line - although, in fairness, they were all interesting posts, going back to "You, too, can add to Jerome Gambit theory" and including "A Strange, But Intriguing Path, Parts 1, 2, & 3" and "Still Strange, Still Intriguing Parts 1, 2, 3 & 4." The most recent post on the line is "We Know What We're Doing (Sort of)".  

Curiously enough, there is still more to learn about the variation, as we shall see.

6.Qg4+

This move, Stockfish 9's preference, is probably the best move, although it has appeared only 5 times in The Database before the current game.

Actually, computer analysis is only slightly helpful in choosing the proper move. Some examples are: 6.d4, evaluated as 0.00 by Stockfish 9 at 35 ply, is seen as the second best move; while the retrograde 6.Nf3!? (no games in The Database), evaluated as -.28 by Stockfish 9 at 35 ply, is seen as the third best move.

Certainly 6.0-0 (no games in The Database) should be playable, although Stockfish 9 at 35 ply evaluates it as -.65 - what's 2/3 of a pawn between friends, right? The game should continue  6...Nxe5 (the only move for advantage) 7.d4 d6.

Most popular for White, and probably most thematic, has been 6.Nxc6, which Stockfish 9 evaluates (at 35 ply) as -.81 after 6...dxc6. A mistake is 6...bxc6?, as it is strongly met by 7.Qg4+!. Black can mix everything up by not capturing the Knight and playing, instead, 6...Qh4!? although Stockfish 9 rates the position after 7.Qe2, then, as roughly even, +.10 (at 35 ply).

With Stockfish 9 pontificating as usual, it is important to remember that we are usually talking about games between club players, and Geoff Chandler's humorous but accurate blunder table always needs to be taken into account - especially because we are talking about the Jerome Gambit! Play what you feel comfortable playing.

6... Kxe5 7.d4+! Bxd4 8.Bf4+! Kf6 9.Bg5+! Kf7 10.Bxd8 Nxd8

Okay, White has played the "best" moves, and now has a Queen and a pawn for three pieces. As Dorothy said, in "The Wizard of Oz", "Toto, I've a feeling we're not in Kansas anymore."

Indeed, the position looks like a challenge to play. Nobody is going to attack or counter-attack aggressively, and it looks like it would be to White's disadvantage to sit back and do nothing.

(By the way, the snarky 10...Bxb2?!, instead of capturing the Knight at d8, would be met by 11.Qf3+! Ke8 12.Bxc7, when, after 12...Bxa1 13.Na3, White would have an advantage in development and King safety to offset the material imbalance [Q + P vs R + B + N]. White can respond to either 13...d5 or 13...Nf6 with 14.0-0 and Black will not be able to get his defenders out fast enough, as they will also have to run the risk of going to the wrong square and being picked off by the enemy Queen with a checking fork. This is a return to the Jerome theme of "White attacks aggressively".)

Looking for guidance, I discovered that the venerable Basic Chess Endings by Reuben Fine (1941) has about 1/4 of a page covering "QUEEN vs THREE PIECES", which can easily be summarized

Without Pawns this is drawn, but there are a few positions where the pieces win... With Pawns the two forces are roughly equivalent. However, with no other material Q + P vs 3 pieces is drawn, while 3 pieces + Pawn win vs Queen. 

The newer Fundamental Chess Endings (2001) by Karsetn Mueller and Frank Lamprecht has about a page of coverage, devoted to the analysis of two game examples, and the terse bit of advice

Outposts, king security and passed pawns again play a major role

 I then checked out the internet to see what was available. One such article that I found to be helpful is here.

All of this information is enlightening, but, in the meantime, two people were playing the game.

[to be continued]

Jerome Pawns Have Mercy!

I just received another bullet game (1 minute, no increment) Jerome Gambit game from Cliff Hardy that ends rather brutally. I will leave the comments up to him, and add diagrams.

This is a bullet game played on Lichess, where the Jerome pawns were rather merciless:

Cliff Hardy - NN

1 0, Lichess, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5. Nxe5+ Nxe5 6. Qh5+ Ng6?! 

The ever popular defence.

7.Qd5+ Ke8 8.Qxc5 Nf6 9.Nc3 d6 10.Qe3 Be6?!

The regular mistake, which leads to a slight advantage to Black, and was inferior to 10...Kf7, with a clear advantage to Black.

11.0-0?!

11.f4 would have been more direct and better

11...Qd7?!

Now things are fairly equal but 11...Nh5!? 12. d4 Rf8 would have restrained White from playing the dangerous advance f4, and still kept a very healthy advantage for Black.

12.f4 Bf7 13.f5 Ne5?!

Encouraging the Jerome pawns to go on the march and yielding White a clear advantage, whereas the defensive 13...Ne7 would still have led to equality. 

14.d4 Nc4 15.Qg3 Bg8

Black tries to prevent the fork of Black's queen and bishop via the White pawn advance e4-e5-e6, though 15...Qe7 would have been a better attempt at doing that.

16.e5 dxe5 17.dxe5 Nd5 18.e6 Qc6 

19.Bg5?

Still winning, but missing that I could have now simply played the superior 19.Qxg7

19...Nxc3 20.Qxc3 Qc5+ 21.Kh1 Kf8 

22.f6 g6 23.f7 Qe5

Trying to shield his rook on h8 from attack but there is no defence any more to White's overpowering pawns.

24.e7+ Kg7 and Black resigned

Jerome pawns have mercy! White would checkmate in 2 moves after 25. f8=Q+ Rxf8 26. exf8=Q