03 December 2024

Radiology

In a rapid game online this morning, I planned an attack well before conditions on the board were ready. My opponent failed to defend appropriately and the attack succeeded.

After some opening moves, we reached this position with White to move. I had White.


At this point in the game, I began to have fantasies about an attack along the f-file against a pinned knight. This attack requires a knight sacrifice on f7 to capitalize on the x-ray.

11.f4! gxf4

11...Bxe5 12.fxe5 Nd7 13.Qh5+-

12.Rxf4

12.Qf3 was better--battery 12...Rf8 13.exf4

12...Be7??

12...Rf8= anticipates White's threats and prevents them.

White to move
Now is the time!

13.Qe2

But. I thought that more preparation was necessary, planning to first double rooks on the f-file.

13.Nxf7!! Kxf7 14.Qh5+ Kg8 15.Qg6+ Kf8 16.Raf1+-

13...Bd7

13...Rf8 was still possible, neutralizing White's plans. 14.Raf1

14.Raf1

14.Nxf7 is less effective now 14...Kxf7 15.Qh5+ Kf8 16.Raf1 Be8 the point of Bd7.

14...Rg8

White to move

15.Nxf7! Kxf7

15...Qb6 16.Rxf6 Bxf6 17.Rxf6 Qxb2 18.Na4 Qb4 19.Nc5 is also winning for White.

16.Qh5+ Kf8 17.Qxh6+ Kf7

White to move

18.Be2?!

Throws away most of the advantage.
I considered 18.Bh7 Rg7 19.Qh5+ Kf8 but did not see the ideas clearly enough.

18...Rg6??

Black moves into forced checkmate.

18...Rg7 19.Bd3 (19.Qh5+ Kg8=) 19...Qh8 (19...Qg8 20.Rxf6+ Bxf6 21.Qxf6+ Ke8 22.Rf2) 20.Rxf6+ Bxf6 21.Qxf6+ Kg8 22.Ne2+-.

19.Qh7+ Rg7

19...Kf8 holds out longer 20.Qxg6 Be8 21.Qh6+ Kg8 22.Qg5+ Kf8 23.Rh4

White to move
White has a mate in five, which I saw to the end.

20.Bh5+ Kf8 21.Qh8+ Rg8 22.Rxf6+ Bxf6 23.Rxf6+ Ke7

23...Qxf6 24.Qxf6#

24.Rf7+ Kd6 25.Qe5# 1-0

02 December 2024

The Grob for Beginners

Beginners should not play the Grob.

Some may object to such a prohibition. Asserting it brings to memory my negative reaction to reading, “I cringe whenever I see 1600-players wheeling out the King’s Indian Attack” (3) in John Donaldson, A Strategic Opening Repertoire (1998). As a sub-1600 player with affection for the Reti Opening when I read this twenty years ago, Donaldson’s harsh words about the KIA seemed aimed at me, too. He states, "everyone should start with 1.e4 and 1.d4 and play classical chess at the beginning of his career” (3). My problem was that I had been playing chess thirty years and was still C-Class. Having learned the moves at age eight and started playing seriously at 15, I was hardly at the beginning of my chess career in my 40s. I thought I should be able to play openings that interested me.

My initial negative response to Donaldson's words were temporary. I agree with him. In fact, I find the so-called "recapitulation theory of chess development" useful pedagogically, even if it does not hold up as a description of most player biographies. See "On the Origin: Reading Journal" (2020). In several forum posts, I have offered the advice that a beginner should only play openings found among the games of Gioachino Greco--with White, that's the Italian, King's Gambit, and Queen's Gambit.

Beginning a game of chess with 1.g4 is clearly risky. The move has gone by many names, but today is most commonly called the Grob in honor of Swiss International Master Henri Grob (1904-1974) who advocated the opening in Angriff (1942) and employed it in correspondence games. The notorious criminal Claude Bloodgood (1937-2001) also employed it in correspondence chess and authored The Tactical Grob (1976).

A few days ago, a beginner played the Grob against me. The beginner in question favors 1.g4 and 1.Nf3 and was under 1200 after nearly 12 years and more than 8000 games on chessdotcom, although the player’s peak rapid rating is 1368.

Chessdotcom does not keep Explorer up-to-date. This data reflects a small portion of the player's games. Nonetheless, it serves to suggest that the Grob has not served him well.

One might object to the term “beginner” for someone who has been active on a chess playing site more than ten years. Although I use that term for everyone under 1200, regardless of how long they have been playing, I also have more than a few losses to such players.* Perhaps novice is a better term. This opponent, 1308 at this writing, is in the top 8% of players in chessdotcom’s pool. From another point of view, the player might be considered quite strong. Certainly he or she should have a plus score against those near the average rating on the site (the average rapid rating on the site today is 618).

Perhaps my advice should be modified somewhat. For a 1200 rated player, the Grob is not an ideal choice for developing the skills needed to rise above 1400. Nor is it a particularly good choice against a player rated hundreds of points higher. The Grob immediately gives Black a slight advantage. Nonetheless, it can be useful against an unprepared player who overestimates this slight advantage.

Here, then, is the game.

Internet Opponent — Stripes, J. [A00]
Live Chess Chess.com, 29.11.2024

1.g4 c6

My reply is not common and is not my usual response, but I have played it once before. I was thinking of a partially remembered line in Bloodgood's book where this move was played a few moves later. Bloodgood shows that it fails as an effort to protect d5 in that line.

Twelve years ago, I had the White side of this position. That game continued 2.e4 d5 3.exd5 cxd5 4.Bg2 Nc6 5.d4 g6 6.c3 Bg7 7.Qb3 Nf6 8.g5 and I won the d-pawn, eventually converting the advantage.

2.a3

This move does nothing for White's position.

2...e5 3.Nc3

In Bloodgood's line, both c4 and Qb3 are commonly combined with placing the bishop on the long diagonal. This move interferes with White's normal plans. The evidence so far is that White has chosen an offbeat opening, but has not taken the time to learn the principal ideas behind the initial move.

4...d5

White to move

Black has a strong center.

4.g5

White has a plus score on Lichess with this sacrifice.

4...Qxg5 5.d4

Perhaps many of those games on Lichess were played by players oblivious to the discovery.

5...Qh5!?

5...Qe7 is played more often here, but I like discouraging the move that White should have begun with.

6.dxe5 Bc5?!

Why not 6...Qxe5? Now, I'm trying to provoke 7.e3 to exchange queens. But also, 1.g4 weakens the e1-h4 diagonal, and I'm speculating that I might be able to use that. That I was able to shows that White's tactical sense needs considerable work--something that develops more rapidly when most games begin 1.e4.

White to move

7.Nf3

7.Bf4! secures the pawn and prepares Bg3, putting an end to my kingside fantasies. As with any opening, the board position makes demands to which the players must attend. My speculative sixth move looks silly if White responds appropriately.

7...Bg4 8.Rg1?? Bxf3-+ 9.exf3

Black to move

9... Qxh2

This fork picks up the e-pawn with tempo.

10.Rg2 Qxe5+ 11.Be2 Nd7 12.Rg5?

12.f4 at least chases the queen back instead of provoking Black to threaten checkmate.

12...Qh2 13.Bf1

13.Qd3 avoids immediate checkmate.

13...Qxf2# 0-1

If you are a novice or even stronger and want to play the Grob, at least do yourself the favor of looking at Bloodgood's pamphlet, The Tactical Grob. Also be aware that trotting out this opening against a much higher rated player means that you could be playing someone who knows the opening better than you.

*As many as 1/3 of them showed evidence of using assistance. 10% have been banned.