Here’s the solution to Monday’s problem, copied from YACPDB (Yet Another Chess Problem DataBase).

If you’re interested you’ll find more Nabokov problems here.

Our much delayed final match of the season, a rearranged London League match against Hammersmith, took place on Tuesday 7 July.

With little at stake for either side, the Hammers weren’t at full strength, resulting in a match between two evenly matched teams.

You’ll see that we went down to a narrow defeat, but there were excellent wins from Iain and Chris.

Thanks to all who played for our London League team throughout what has been a sad and difficult season following Gavin’s sudden death last summer. Thanks, especially, to Sampson for captaining the team along with all the other work he’s done for both the club and the Thames Valley League this year.

If you know anyone of 2000+ strength who’d like to play for our first teams in any or all of the London, Thames Valley and Surrey Leagues, do get in touch.

We look forward to seeing you all again over the board next season.

Vladimir Nabokov was one of the most influential novelists of the 20th century as well as being a talented chess problemists.

I found this example in an article by NM Ilan Vardi in the July 2026 issue of CHESS.

It’s White to play and force mate in three moves, against any Black defence.

Just the thing for a hot summer day!

Monday’s puzzle was taken from the game Vaccani – Cohn (3rd IBCA Blind World Championship 1975).

From this position the game continued 42. h4 h6 43. g5 h5 44. Ke5 Ke7 and a draw was agreed a few moves later.

As some of you spotted, both players erred here. White’s 43rd move, g5, was a WMOTB (Worst Move On The Board) – the other two legal moves led to draws but this should have lost.

Black should have replied 43… gxh5, when after 44. hxg5, Ke8 wins (but Kg8 only draws), and after 44. Kxg5, Black can win with any of Ke7, Kg7 or Ke8 (but not Kg8).

As always, go away and play through these variations yourself. Don’t just believe me (or my computer): convince yourself through active learning.

This is just the sort of position you might get when playing on increments. Learning to play endings like this accurately will gain you a lot of extra half (or even full) points.

My latest Minor Piece tells the inspirational story of Hans Cohn, a blind Jewish boy from Berlin who fled the Nazis to study at Worcester College for the Blind. He played chess at a high level for decades, representing Willesden in the London League. I was privileged to play him in a Richmond 2 v Willesden match in 1976.

Here’s a pawn ending from one of his games: Vaccani – Cohn (3rd IBCA Blind World Championship 1975).

From this position the game continued 42. h4 h6 43. g5 h5 44. Ke5 Ke7 and a draw was agreed a few moves later.

Your thoughts, please.

Monday’s puzzle was an endgame study composed by two of the greatest Soviet masters of this art, Leopold Mitrofanov and David Gurgenidze (Shakhmaty v SSSR 1987), which I discovered in the June 2026 issue of the British Chess Magazine.

The solution is 1. a6! Ra1 2. Bg1+! Rxg1 3. Kh8! Rd1 4. a7 Rh1+ 5. Kg8 Rg1+ 6. Kf8 Rf1+ 7. Ke8 and White will emerge with queen against rook: not so easy to win over the board, but sufficient for a win in a study.

Congratulations to David, the first to find the first two moves, and to Mike L, who found White’s third move. You might want to work out for yourself why the unlikely Kh8 is the only winning option here.

You can play through the solution here: click on any move for a pop-up window.

The inaugural Gavin Wall Memorial Trophy match took place at Orleans Park School, Twickenham, the HQ of Richmond Junior Club, on Saturday 20 June.

The trophy celebrates the life of IM Gavin Wall, who sadly died last summer. Gavin was one of the very early members of Richmond Junior Club, and, later, for many years in the late 1980s, 1990s and early 2000s, a much valued member of the RJCC team, helping to run the morning group as well as giving regular lessons and simuls.

It was only just before his untimely death that he returned to RJCC to give a simul.

We fielded a team of players rated under 1800, but it soon became clear that the young stars of RJCC were all underrated by several hundred points, a tribute to the excellent coaching they receive there.

Although we had the white pieces in the first round, we lost every game against our mostly lower rated opponents.

In the second round we did slightly better, with a great win for George, along with draws for Advik and Oscar. We’ll need to field our A team next season if we want to get our hands on the trophy.

Thanks to everyone who played in our team, and especially to Karl for getting the team together and captaining on the day. I understand that, despite the result, everyone enjoyed the experience.

It’s the last match of the season and you’re facing your rivals for the league championship.

If you win, you win the league, if you draw there will be a play-off, and if you lose, they will win. The good news is that you have the white pieces.

Yours is the last game to finish. The match is level, you’re playing on increments, with a large crowd gathered round your board.

Deep into the ending, here’s your position, with White to move.

How will you continue? Can you find a way to win? Naturally, a player with your endgame skill will be supremely confident about winning a potential Q v R ending, even at 10 seconds a move.

Monday’s position, with Black to move, was taken from a game between Leo Wosner (Wood Green) and Alexander Distler (Athenaeum), played in a London League match in November 1948.

In those days Athenaeum was one of London’s leading clubs while Wood Green was a lot weaker: it’s very different today.

The game continued 27… Rxh3+! 28. Kxh3 Rh8+ 29. Kg4 f5+ 30. Kg5 Nf8! 31. cxd5 Rh6! and White resigned.

I’m sure everyone played Rxh3+ here, so you had to see 30… Nf8! and 31… Rh6! to score full marks.

This was taken from my latest Minor Piece, about Alexander Distler, which I’d recommend you read here.

Here, as a bonus, is another position from this article (with a rook moved to avoid a second solution):

White wins by playing 1. Ra1 Rg1 2. Rf1! – an idea that happens from time to time and is worth remembering. Not so easy if you haven’t seen it before.

As we finally approach the end of the London League season, this week’s puzzle is taken from a London League match between Athenaeum and Wood Green.

It’s Black’s move: how would you continue?

(Top tip: White’s last move was c2-c4, so en passant is legal, but perhaps not advisable.)