Tuesday, 13 January 2026

Miniatures 22

IN this occasional series I am going through my decisive games of 20 moves or fewer.

Spanton (151 BCF) - Dan Mayers (178 BCF)
Barbican (London) Rapid 1990
Alekhine Defence
1.e4 Nf6 2.Nc3!?
International master John Cox stated in Starting Out: Alekhine's Defence that in his experience with the opening he faced 2.Nc3!? more than half of the time.
2...d5 3.exd5 Nxd5 4.Bc4!? Nxc3!?
More popular are 4...e6, 4...c6 and especially 4...Nb6, all of which score slightly better than the text in ChessBase's 2026 Mega database.
5.Qf3!? e6 6.dxc3!?
Slightly more common is 6.Qxc3, with pressure against g7, but Stockfish17.1 and Dragon1 prefer text.
6...Nc6
How should White proceed?
*****
*****
*****
*****
*****
7.Ne2?!
Probably better is 7.Qe2, clearing the f3 square for the white king's knight, and preventing 7...Ne5.
7...Ne5 8.Bb5+!? c6 9.Qe4 Qd5 10.Qxd5 exd5 11.Bd3 Bd6 12.Be3 0-0 13.Kd2?! Ng4!? 14.f3 Nxe3 15.Kxe3 c5!? 16.Rae1??
Completely missing one of the points - arguably the only point - of Black's last move. Necessary is 16.b3, albeit Black is better.
16...c4 0-1
LESSON: when the opponent makes a move that does not seem at first glance to have much going for it, there are two possibilities - either the move really does not have much going for it, or you have missed the idea entirely.

Monday, 12 January 2026

Miniatures 21

IN this occasional series I am going through my decisive games of 20 moves or fewer.

Robert Newton (158 BCF) - Spanton (151 BCF)
Halifax Major 1990
King's Fianchetto Opening
1.g3 g6 2.Bg2 Bg7 3.d4 d5 4.Be3!?
This move does not appear in ChessBase's 2025 Mega database.
4...c5!? 5.Nc3!?
Not 5.dxc5?? Bxb2.
5...cxd4
Stockfish17.1 and Dragon1 do not like this, preferring 5...Nc6 or 5...e5!?
6.Bxd4 e5 7.Bc5
How should Black proceed?
*****
*****
*****
*****
*****
7...e4?
The engines reckon Black has an edge after 7...Na6 8.Ba3 d4.
8.Qd2?!
White has a large advantage after 8.Nxd5, according to the engines.
8...Be6 9.0-0-0!? Na6 10.Ba3 Nf6 11.f3 Qb6?!
Probably better is 11...Rc8.
12.fxe4 Ng4?
Best, according to the engines, is 12...dxe4, although they reckon 13.Nh3 gives White the upper hand.
13.Nxd5 Bxd5 14.Qxd5 Ne3??
After 14...Rd8 15.Qxd8+ Qxd8 16.Rxd8+ Kxd8 17.Nf3 White is winning, but there is a long way to go before the position becomes resignable.
15.Qd7#
LESSON: king safety is not a paramount concern in a quiet opening, but if such an opening suddenly becomes sharp, beware.

Sunday, 11 January 2026

Miniatures 20

IN this occasional series I am going through my decisive games of 20 moves or fewer.

Spanton (151 BCF) - N Rutherford (105 BCF)
Barbican (London) Rapid 1990
St George Defence
1.e4 a6 2.d4 b5
This is how Tony Miles with black beat Anatoly Karpov in a 1980 game.
3.c4!?
Karpov preferred the more conventional 3.Nf3.
3...Bb7!? 4.cxb5 axb5 5.Bxb5 Bxe4 6.Nf3 Bxb1!? 7.Rxb1 Rxa2?!
Stockfish17.1 and Dragon1 dislike this.
How should White proceed?
*****
*****
*****
*****
*****
8.0-0
This is not bad, but strongest is 8.Qb3, according to the engines.
8...Ra8!?
The engines fluctuate between this and 8...Nf6, coming to prefer the latter.
9.Ne5
9.d5!? is suggested by the engines.
9...Nf6 10.g4?!
Again the engines like d5.
10...c6!?
This is the engines' top choice.
11.Qf3 d6??
Black is fine after 11...Qb6!?, according to the engines.
12.Nxc6 1-0
LESSON: when behind in development, and especially if uncastled, one slip can be fatal.

Saturday, 10 January 2026

Miniatures 19

IN this occasional series I am going through my decisive games of 20 moves or fewer.

Spanton (151 BCF) - Geoffrey Stearn (158 BCF)
Highbury (London) Rapid 1990
Spanish Schliemann
1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Qe2!?
This is only sixth-most popular in ChessBase's 2026 Mega database, but has been played by grandmasters.
4...fxe4 5.Qxe4 Nf6 6.Qe2
How should Black proceed?
*****
*****
*****
*****
*****
6...Be7
Stockfish17.1 and Dragon1 suggest 6...Bd6!?, which is second in popularity to 6...e4?! (after the latter, White gets the upper hand with 7.d3, according to the engines).
7.Nxe5?
Better is 7.Bxc6 dxc6 8.Nxe5, although after 8...0-0 Black has some compensation for a pawn.
7...Nxe5 8.Qxe5 0-0
Black is a pawn down, but has more than enough compensation, according to the engines
*****
*****
*****
*****
*****
9.0-0 c6
The engines prefer 9...d5.
10.Ba4?
White needed to play 10.Be2, with equality, according to the engines.
10...d5 11.d4 Bd6 12.Qg5!?
The engines agree this is best, but the white queen remains a target, and White is short of pieces on the kingside.
12...Qc7 13.h3?
This natural-looking move is a mistake. Better is 13.Qh4 or 13.f4!?, but Black is winning, according to the engines.
13...Ne4 14.Qe3 Be6?!
Much stronger is 14...Bh2+ 15.Kh1 Bf4 16.Qe1 Bxc1 17.Qxc1 Nxf2+.
15.Nd2?
Better is 15.Nc3.
15...Bf4 16.Qe2 Bh2+ 17.Kh1 Rxf2 18.Qd3 Rxf1+ 0-1
LESSON: early development of the queen is fraught with danger - it often becomes a target for tempi-gaining moves by the opponent's minor pieces.

Friday, 9 January 2026

More League Chess

PLAYED on board one (of five) for Battersea 3 against West London in Central London League Division Three last night.

James Regan (unrated) - Spanton (1929)
Sicilian Delayed Wing Gambit
1.e4 c5 2.a3!?
There are more than 4,800 examples of this move in ChessBase's 2026 Mega database.
2...Nc6 3.b4!?
A position occurring 1,129 times in Mega26
*****
*****
*****
*****
*****
3...cxb4
Stockfish17.1 and Dragon1 prefer 3...Nf6!?, eg 4.b5 Nd4 5.c3 Ne6 6.e5 Nd5, claiming a slight edge for Black.
4.axb4 Nxb4 5.c3 Nc6 6.d4
For a pawn, White has space and open lines - fair compensation, according to the engines
*****
*****
*****
*****
*****
6...d5 7.exd5 Qxd5 8.Na3 Bf5
This and 8...Nf6? are equally popular, but the latter runs into 9.Nb5, when the commonest continuation, 9...Qd8?!, is probably another mistake as White has 10.d5, with Bf4 to come.
9.Nb5 Rc8 10.Nxa7! Nxa7
Marcelo-Rafael Ortali (2041) - Rainer Siegmund (2149), Arvier (Italy) 2005, saw 10...Ra8?! 11.Nb5, when Black, presumably realising that 11...Rxa1?? loses to 12.Nc7+, and that 11...Qe4+ is met by 12.Be3, settled for 11...Rc8, but lost quickly: 12.Be2 e5?! 13.Ra8! Qd8 14.Rxc8 Bxc8 15.d5 Nb8 16.d6 Na6 17.Bc4 Nf6 18.Nf3 Bg4 19.Nxe5! 1-0.
11.Rxa7 e5 12.Nf3 exd4
This has been played by a 2689, but the engines prefer 12...Nf6!?
13.Nxd4
The engines reckon 13.Qxd4 gives White at least a slight edge.
13...Bc5?
Magnus Carlsen (2837) - Ernesto Inarkiev (2689), World Blitz Championship (Riyadh, Saudi Arabia) 2017, went 13...Bd7 14.Nb5!? Qxd1+ 15.Kxd1 Bc6?! 16.Bd3 Bc5 17.Re1+ Ne7 18.Ba3 Bxa3 19.Rxa3 Rd8, with an equal game, according to the engines (but 1-0, 27 moves).
How should White proceed?
*****
*****
*****
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*****
14.Bb5+
The engines suggest the strong novelty 14.Nxf5!, when 14...Bxf2+? fails to 15.Kxf2! Qxd1 16.Bb5+ Qd7 17.Rxb7!, while 14...Qxd1+ 15.Kxd1 Bxa7 can be met by 16.Nd6+ Kd7 17.Nxf7 etc.
14...Kf8!?
14...Bd7 is also fine for Black.
15.Ba3?
Capturing on f5 is still the way to go, but now gives only equality, according to the engines, eg 15.Nxf5! Qxd1+ 16.Kxd1 Bxa7 17.Ba3+ Bc5 18.Nd6! Rc7 19.Ne8!?, when Black has to either return the exchange or allow a draw by repetition. That is a tricky line to visualise, but also better than the text, according to the engines, is 15.Ra4!?
What should Black play?
*****
*****
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*****
15...Qe4+?
Dániel Kéméndi (1893) - András Bakos (1934), Hungarian Team Championship 2023, went 15...Bxa3 16.Rxa3 Qxg2, when Black had won a pawn, and went on to win the game.
16.Kf1!? Bxa3 17.Rxa3 Nf6 18.f3 Qf4 19.Ne2 Qc7 20.Nd4 Qf4
The engines reckon Black is slightly better after 20...Bg6.
21.Ne2 Qc7 22.Nd4
I announced I was claiming a draw as my next move would be:
22...Qf4 ½–½
Battersea 3 won the match 3.5-1.5 (West London defaulted on bottom board).
My Battersea Season 2025-6
Date       Event  Colour  Rating  Opp's Rating  Score  Season's Perf
16/9/25   CLL       W       1936         1952             0           1552
18/9/25   CLL       W       1936         1797             =           1675
16/10/25 CLL       W       1889         2047             0           1665
23/10/25 CLL       B        1889         1823             1           1805
18/11/25  LL         W       1891         1980             =           1840
20/11/25  CLL      W       1891         1866             1            1911
25/11/25  BCC     B        1891         1817             1            1955
9/12/25    LL         W       1904         1982             1            2008
16/12/25  LL         B        1904         2046             0            1968
18/12/25  CLL      B        1904         2066             1            2018
6/1/26      CLL      W       1929         2150             =            2066
7/1/26      LL         W       1929         1971             =            2058
8/1/26      CLL      B        1929         1800?           =            2038             
CLL: Central London League
LL: London League
BCC: Battersea club championship
I also have a win-by-default in the Central London League

Thursday, 8 January 2026

League Chess

PLAYED on board four (of eight) for Battersea against Athenaeum in London League Division Two last night.

Spanton (1929) - Tony Wells (1971)
Spanish Cozio
1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3
More popular in ChessBase's 2026 Mega database are 4.c3 and especially 4.0-0, but the text is the top choice of Stockfish17.1 and Dragon1, although they do fluctuate between it and castling.
4...Ng6
The main move in Mega26 is still 4...g6, but that has fallen out of favour since the strength of 5.d4 exd4 6.Nd5!? was more widely realised.
5.0-0 Nd4!?
This is apparently a novelty. The engines are OK with it, but they prefer 5...a6 or 5...Bc5.
How should White proceed?
*****
*****
*****
*****
*****
6.Nxd4 exd4
The position resembles a Bird, but one with the extra moves Nc3 and 0-0 for White, ...Ne7-g6 for Black. The engines reckon this is an improvement for Black.
7.Ne2 a6!?
The engines do not like this, preferring 7...c6 or 7...Bc5, but not 7...Qg5?, when both 8.Nxd4 and 8.Bc4 are good for White.
8.Ba4 b5 9.Bb3 Bb7 10.d3 Qf6!?
The engines suggest 10..c5, but give White the upper hand.
11.c3 0-0-0?!
Opposite-side castling makes the game trickier for both players, but the main effect here is to lose a pawn.
12.Nxd4 d5? 13.Qg4+ Kb8 14.Bg5 Qd6 15.Bxd8 Qxd8 16.exd5 h5 17.Qe4 h4 18.Rfe1 Bd6 19.Nc6+ Bxc6 20.bxc6 Qg5
Black is the exchange and two pawns down, but has some practical chances thanks to the black pieces being more active, and the presence of opposite-coloured bishops
*****
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*****
21.Re3
There was nothing wrong with 21.Bxf7, eg 21...Nf4 22.a4 b4, and now 23.Re3.
21...f5 22.Qf3 f4 23.Re6 h3 24.Rxg6?
Giving back the exchange throws away much of White's advantage.
24...Qxg6 25.g3?
And now Black has complete equality, according to the engines, which suggest 25.Bd5!? or 25.Re1.
25...fxg3 26.fxg3
The engines reckon both recaptures leave the position completely equal.
26...Qe8?!
A strange retreat. It is hard to understand why 26...Rf8 was not played.
27.Qf7?
Now Black gets at least the upper hand, while 27.Bf7 and 27.Qe4 give White at least a slight edge, according to the engines.
27...Qe3+ 28.Qf2 Qxd3
This is not just a pawn - it also stops White closing the g1-a7 diagonal with d4.
29.Rd1 Qg6 30.Bc2?!
The bishop should probably stay on the a2-g8 diagonal, with 30.Bd5 or 30.Bf7.
30...Qe6 31.Bb3 Qh6?!
Rightly rejecting the chance to repeat, but much stronger is 31...Qe7 or 31...Qe5, according to the engines.
32.Qd2?!
The engines prefer 32.Bd5, 32.Rd5 or 32.Bf7.
32...Bc5+ 33.Kh1 Qf6 34.Qf4!?
This is best, according to the engines, but inadequate.
Black to play and win
*****
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*****
34...Qxc6+
Even stronger is 34...Qxf4 35.gxf4 Re8, with ...Re2 to come, and an advantage worth about a minor piece, according to the engines.
35.Bd5 Qe8
Black still has at least the upper hand after the engines' 35...Rd8!
36.Qg4?!
It was time to offer an exchange of queens, with 36.Qe4 or 36.Qf7, according to the engines.
36...Qe3
Activating the rook with 36...Rf8! gives a slight edge, according to the engines, one point being 37.Qxh3? loses to 37...Qe2.
37.Qf3 Rd8 38.Qxe3 Bxe3 39.Bf3 Rxd1+ 40.Bxd1
How would you assess this bishops-of-opposite-colour ending?
*****
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*****
*****
White can win the h3 pawn, but the ending remains drawn.
40...a5 41.Bg4 Kb7 42.Bxh3 a4 43.Kg2 Bc1 44.b3 axb3 45.axb3 Bb2 46.c4 gxc4 47.bxc4 Kc6 48.Kf3 Kd6 49.Ke4 c5 50.Bc8 Ke7 51.h4 Kf6 52.g4 Bd4 53.Bf5 Kf7 54.h5 Kf6 55.Bh7 Kg5 56.Bf5 Kf6 57.Kd5 Kg5 58.Ke6 Bf6 59.Kf7 Bd4 60.Be6 Be5 ½–½
Battersea won the match 6.5-1.5 (Athenaeum defaulted on bottom board).
My Battersea Season 2025-6
Date       Event  Colour  Rating  Opp's Rating  Score  Season's Perf
16/9/25   CLL       W       1936         1952             0           1552
18/9/25   CLL       W       1936         1797             =           1675
16/10/25 CLL       W       1889         2047             0           1665
23/10/25 CLL       B        1889         1823             1           1805
18/11/25  LL         W       1891         1980             =           1840
20/11/25  CLL      W       1891         1866             1            1911
25/11/25  BCC     B        1891         1817             1            1955
9/12/25    LL         W       1904         1982             1            2008
16/12/25  LL         B        1904         2046             0            1968
18/12/25  CLL      B        1904         2066             1            2018
6/1/26      CLL      W       1929         2150             =            2066
7/1/26      LL         W       1929         1971             =            2058            
CLL: Central London League
LL: London League
BCC: Battersea club championship
I also have a win-by-default in the Central London League

Wednesday, 7 January 2026

Civil War

PLAYED on board one (of five) for Battersea against Battersea Galacticos in Central London League Division Two last night.

Spanton (1929) - Tom Farrand (2150)
Maróczy Bind
1.e4 c5 2.Nf3 e6 3.c4 b6!?
This is fourth-most popular in ChessBase's 2026 Mega database, behind 3..d6, 3...a6 and especially 3...Nc6, but it has the best score percentagewise.
4.Nc3 Bb7 5.d4 cxd4 6.Nxd4 d6!?
This is the commonest continuation in Mega26. but it is disliked by Stockfish17.1 and Dragon1, which suggest 6...Nf6 or 6...Nc6.
7.Be2 Nf6 8.f3 Be7 9.0-0 0-0
Now both sides have castled, how would you assess the position?
*****
*****
*****
*****
*****
White's Maróczy Bind arose from a Sicilian move-order, but equally could have come from the Symmetrical Variation of the English, and is classified as such by ChessBase. The engines give White a slight edge. There are 352 examples of the diagrammed position in Mega26.
10.Be3 a6 11.Qd2 Nbd7 12.Rac1 Rc8 13.Rfd1 Ne5 14.b3 Qc7 15.Na4 Ned7
Black has a classic hedgehog setup
The arrangement of Black's pieces is the one chosen to illustrate the hedgehog in Wikipedia.
16.Nc2!? Rfd8 17.Bd4 Bf8 18.Qe3 Nc5!?
How should White proceed?
*****
*****
*****
*****
*****
19.Nb2
We both thought White could not afford the dark-square weaknesses in his position after 19.Bxf6!?, but the engines marginally prefer that over the text.
19...Ncd7 20.Na4
We looked at 20.b4? in the postmortem, but TF suggested 20...e5 21.Bc3 d5!, which the engines reckon gives Black the upper hand, their main line running 22.exd5 Nxd5 23.cxd5 Qxc3 24.Qxc3 Rxc3. If 20.g4?, then 20...e5 21.Bc3 d5! is even better for Black.
20...Nc5 21.Nb2 Ncd7 22.Na4 ½–½
Battersea Galacticos won the match 3-2.
My Battersea Season 2025-6
Date       Event  Colour  Rating  Opp's Rating  Score  Season's Perf
16/9/25   CLL       W       1936         1952             0           1552
18/9/25   CLL       W       1936         1797             =           1675
16/10/25 CLL       W       1889         2047             0           1665
23/10/25 CLL       B        1889         1823             1           1805
18/11/25  LL         W       1891         1980             =           1840
20/11/25  CLL      W       1891         1866             1            1911
25/11/25  BCC     B        1891         1817             1            1955
9/12/25    LL         W       1904         1982             1            2008
16/12/25  LL         B        1904         2046             0            1968
18/12/25  CLL      B        1904         2066             1            2018
6/1/26      CLL      W       1929         2150             =            2066   
CLL: Central London League
LL: London League
BCC: Battersea club championship
I also have a win-by-default in the Central London League

Tuesday, 6 January 2026

Monday, 5 January 2026

Summing Up Kraków

MY score in the 60+ seniors of +4=3-1 (I also took a halfpoint bye) gained 15.4 Fide elo.
The final standings are here - scroll down and you will see one player managed to lose 175 elo.
                                                                 Kraków main square
For some reason I do not understand, the video seems to work on laptops, but not on mobiles

Sunday, 4 January 2026

Cracovia 60+ Round Nine

FACED a Spaniard.

Spanton (1913) - Manuel Llopis de Aysa (2000)
QGD Exchange
1.c4 e6 2.Nc3 d5 3.d4 Nf6 4.cxd5 exd5 5.Bg5 Be6 6.e3 0-0 7.Bd3 h6!?
There was a time, not so long ago, when ...h6 had a dubious reputation in the Exchange Variation of the Queen's Gambit Declined. The problems were thought to be twofold: i) it provides White a target for a g-pawn push, or a possible piece sacrifice; ii) it takes away a square a black rook might want to use, after joining the third rank at d6 or e6, for putting pressure on White's kingside.
So what has changed? Nothing really - those criticisms are still valid, BUT 7...h6!? comes with engine approval, eg it is the top choice of Stockfish17.1 and Dragon1. Therefore, the argument goes, the benefits of ...h6 must outweigh its drawbacks.
The position after 7.Bd3 occurs 11,650 times in ChessBase's 2026 Mega database
The continuation 7...c6 occurs 3,916 times (34%), 7...Nbd7 occurs 2,939 times (25%) and 7...h6 occurs 2,251 times (19%).
However, make the same search, but from 2023 onwards only, and the results are rather different. There is still quite a substantial number of games, 2,227, and 7...c6 is still most popular, but its 695 appearances represent a more modest 31%. In second place, with 630 games (28%). is 7...h6, while 7...Nbd7's 265 games is 12%.
In other words, in recent praxis, 7...c6 has slipped three percentage points, and 7...Nbd7 has dropped 13 percentage points, but 7...h6 has gained nine percentage points.
This is surely an example of how engines are affecting opening choices, even in non-tactical positional lines.
Back to the game.
8.Bh4 Re8 9.Qc2
Guess which move is Black's most popular continuation (hint: it is also liked by the engines)
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*****
Well done if you plumped for 9...c5!? - you either know your (modern) theory, or you have a natural affinity for the Exchange Variation of the QGD.
I suspect most club players would give 9...c5!? little or no consideration. After all, what happens if White captures on c5, saddling Black with an isolated queen's pawn? Well, after 10.dxc5, the engines continue 10...d4!?, and if 11.exd4 (the most popular move in Mega26) Qxd4 (attacking the h4 bishop as well as the c pawn) 12.Nf3, then 12...Bd8+!?, when the engines reckon Black is at least equal.
The engines' alternative to 10.dxc5 is 10.Nf3 or 10.Nge2, but then 10...c4!? comes with tempo. For those who do not like the ...c4 move in such positions, 10...Nc6 looks reasonable.
9...c6
This, to me, is the most natural continuation, or, at least, the one I regard as being most 'normal' in this opening.
The position occurs 2,716 times in Mega26
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10.Nf3 Ne4 11.Bxe7 Qxe7 12.Bxe4!?
This is very much second in popularity to 12.0-0, but it has been played by Magnus Carlsen and other strong grandmasters.
12...dxe4 13.Nd2 Bf5
ML offered a draw.
Who, if anyone, stands better?
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Equal chances, according to the engines.
14.0-0 Bg6 15.a3 Nd7 16.b4 Nb6 17.Na4 Nxa4
The engines reckon Black has at least the better part of equality after 17..Nd5.
18.Qxa4 a6 19.Qc2 Rad8 20.Nc4?!
The engines strongly dislike this, suggesting 20.Qc5 or 20.Rfc1 (one of the points of 20.Rfc1 is that it frees the f1 square for the knight).
20...Qg5
Best, according to the engines, is 20...Rd5, eg 21.Ne5 Bh5 22.h3 f6 23.Nc4 Rg5, when Black has promising kingside play.
21.Kh1 Bf5 22.Ne5 f6 23.Nc4 Be6 24.Rae1 Bxc4 25.Qxc4
How would you assess this heavy-piece middlegame?
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Completely equal, according to the engines.
25...Qd5 26.Rc1 Qxc4 27.Rxc4 Rd5 28.Rfc1 Kf7 29.Rc5 Ke6 30.Kg1 Rb8 31.Kf1 Rxc5 32.Rxc5
How would you assess this rook-and-pawn ending?
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Completely equal, according to the engines.
32...Kd6 33.Ke2 b6 34.Rc2 Rc8 35.f3 exf3+!? 36.gxf3 Re8 37.Kd3 Re7 38.e4 Re8?!
Black should not do nothing - the engines suggest 38...g5, maintaining equality.
39.Rg2
The engines suggest 39.f4 or 39.a4.
39...Re7?!
White's rook should almost certainly not be allowed to occupy g6, so again ...g5 is called for.
40.Rg6
How should Black proceed?
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40...Kc7?!
The engines suggest 40...Ke6, or play on the queenside with 40...b5 or 40...a5, or 40...h5!?, but in each case with a large advantage to White.
41.f4 Rd7 42.Kc4
The engines suggest clamping down on the kingside with 42.h4, intending h5, or advancing on the queenside with 42.a4. If, for example, 42.h4 is met by 42...c5, then 43.bxc5 bxc5 44.d5.
42...Kd6!?
This is the best try, according to the engines, but they reckon White is winning.
How should White proceed?
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43.e5+?!
Winning a pawn, but letting the black rook become active. Instead, White should increase the pressure, eg 43.f5!? Kc7!? 44.a4 Rf7 45.a5 h5!? 46.h4 Kb7 47.Rg1 Re7 48.Re1 Rf7 49.Kd3 Kc7 50.Rc1 Kb7 51.c5 cxd5 52.exd5 bxa5 53.bxa5 Re7 54.Kd4, when White's advantage is worth more than a rook, according to the engines - Black's three kingside pawns are held up by two White pawns, leaving d5 a monster.
43...Ke6 44.exf6
The engines prefer 44.h4!?, and if 44...Kf6, then 45.Rg1!?, the point being 45...Kxf4? loses to 46.e6 Re7 47.Rf1+ Ke4 48.Re1+ Kf5 49.d5 etc.
44...gxf6 45.Rxh6 Rg7 46.Rh5 Rg1 47.f5+ Kd6 48.Rh6 Rc1+ 49.Kb3 Kd5 50.Rxf6 Kxd4 51.Kb2
Black has three plausible rook moves - which should he play?
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51...Rf1?
The engines agree this loses; they also agree 51...Rc4! draws. Stockfish17.1 reckons 51...Rh1!? also draws, but Dragon1 reckons it loses. Even after the 51...Rh1!? line is continued for several moves, eg 52.Rxc6 Rxh2+ 53.Kb3 b5 54.Rxa6 Rh3+ 55.Kc2 Rh2+ 56.Kd1 Rf2 57.f6 Rf5 58.Rd6+ Ke4, both engines persist in their different evaluations. One reason 51...Rc4! draws is that 52.h4 can be met by 52...Ke5.
52.Rxc6 Rf2+
How should White proceed?
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53.Rc2?
Both 53.Kc1 and 53.Kb3 apparently win, but the text does not. One winning line runs 53.Kc1 Rxf5 54.Rxb6 Kc3 55.Rc6+ Kb3 56.Rxa5, when White is three pawns up, and the Syzygy endgame tablebase confirms Black is lost.
53...Rxf5 54.h4 Rh5 55.Kb3!?
Black to play and draw
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55...b5?
The one plausible move that loses, according to the engines. Of course not 55...Rxh4?? 56.Rc4+ etc, but both 55...Kd5 and 55...a5!? leave White with at best a slight edge, according to the engines, although it takes Dragon1 a lot longer to realise this than Stockfish17.1. After 55...Kd5, White can protect the h pawn with 56.Rh2 or 56.Rc4, but there seems no way to make progress, while 56.Rd2+ Kc6 57.Rd4 does not change anything.
After 55...b5? it is White to play and win
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56.Rc6?
Thanks to 55...b5?, White's protecting the h pawn with 56.Rh2!? now wins, eg 56...Ke4 57.Kc3 Ke3 58.Rh3+ Ke4 59.Kc2!? Kd4 60.Ke2 Ke4 61.Kf2 Kf4 62.Rh1 Kg4 63.Ke4 Kf5 64.Kd4!? Kf6 65.Rh3!? (White's ability to temporise with the rook is what makes the endgame winning) Kf5 66.Re3!? Rxh4+ 67.Kc5 Rh6 68.Kd3 with Rd6 and Rxa6 to come. There are lots of alternatives along the way, but the engines are sure White always has a win.
56...Rxh4 57.Rxa6
The main difference between the position in the game and the one reached in the previous note is that in the game White's king is confined to the back three ranks.
57...Rh3+ 58.Kc2 Rh2+ 59.Kd1 Kd3 60.Ke1 Kc4 61.Rg6 Kb3 62.Rg3+ Ka4 63.Rd1 Ra2 64.Kc1 Rxa3 65.Rxa3+ Kxa3 66.Kc2 Kxb4 ½–½
With the b pawn in its half of the board, this is only a win for the attacking side if the king can get to one of three squares two ranks ahead, ie in this case a3, b3 or c3, and since White easily stops that with the obvious 67.Kb2, the ending is drawn