26 July 2025

Annotated Game #312: Adventures in the endgame

In this next first-round tournament game, there are some adventures in the opening, where Black directly challenges my Stonewall Attack with 3...Bg4 and non-standard positions are a result. After analysis, I feel I better understand key ideas for White such as exchanging on d5 followed by Qb3, for more active play. However, most of the adventures occur in the endgame, which livens up what I assessed (correctly) should have been a straightforward draw. In addition to some of the winning ideas found, I also think simple ideas like the move 26 one of just keeping the rooks on the board for an easier draw, are valuable to understand for future play.


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1.d4 Nf6 2.e3 d5 3.Bd3 Bg4 a critical and independent reply to the Stonewall Attack. 4.f3 Bh5 5.c4 e6 6.Nc3 Be7 7.Nge2 one main idea here is to chase the Bh5. 7.cxd5 is the engine's favorite idea. exd5 8.Qb3 7...0-0 8.Nf4 Bg6 9.Nxg6 9.cxd5 exd5 10.Bxg6 now the engine considers the knight more valuable than the bishop. hxg6 11.Qb3 White is more active and is pressuring both d5 and b7. 9...hxg6= 10.Bd2?! I am still not picking up on the cxd5 idea and this also leaves my king in the center longer. c5 an excellent move, I did not anticipate the break. 11.Ne2?! it would be better to resolve the central tension one way or another. dxc4 12.Bxc4 Nc6 the ugliness of White's position and piece placement is obvious, compared to Black's more harmonious development. 13.Bc3 cxd4 this releases the tension and helps reduce the positional deficit for White. 13...Rc8!? 14.Nxd4 Nxd4 15.Bxd4 Black still has an advantage, but here I was feeling better about my position, with two active bishops. Nd7?! this is too slow and cedes the initiative. 15...Qa5+ would take advantage of the White king's placement. 16.Kf2 16.Bc3?! is worse after Bb4 17.Qd2 Bxc3 18.Qxc3 Qxc3+ 19.bxc3 inflicting an isolated c-pawn on White. 16.Kf2= Bf6 17.Bxf6 Nxf6 18.Qxd8 with the queens off, this should be a draw. Rfxd8 19.Rhd1 Rac8 20.Rxd8+ here my draw offer was rejected, so I did not make another one. Rxd8 21.Ke2 Kf8 22.h4 prophylaxis against a Black g-pawn advance. Ke7 23.Bb3 Nd7 24.Rc1 Nb6 25.Rc7+ nothing better is available. Rd7 forced. 26.Rxd7+ transforming the endgame into BvN, which should still be drawn. 26.Rc2 simply retreating the rook and repeating the idea as needed was another option that I admit I did not consider. 26...Nxd7 27.Bc2 while still an even draw, with the rooks off, the limits of White's bishop are more evident now. Kd6 28.g4 still completely drawn, although I might have kept this in reserve. Nf6 29.Kd3 centralizing the king. Nd5 30.a3 remembering that the way to combat the knight is to take away as many squares as possible. Ke5 31.f4+ Kf6?! 32.Kd4 all Black's maneuvering has done is improve my relative king position. Ke7?? a typical endgame blunder, where the punishment is not obvious. 33.g5? the second-best move. 33.Be4! is what I missed here, although I eventually recognized the pin the knight idea. The point is Kd6 34.Bxd5 exd5 and only now 35.g5! leads to a won K+P endgame, due to Black's flawed pawn structure on the kingside and with the isolated d-pawn. 33...Kd6 34.Ba4?!= 34.Be4 is still winning. 34...f6? another non-obvious error. It seems logical to un-double Black's pawns, but that makes clearing the way for the h-pawn more of a threat. 35.Bb3= keeping the draw in hand. 35.gxf6! gxf6 35...Nxf6? 36.Bc2+- collecting the g6 pawn. 36.Be8! Ne7+- I calculated this far and did not see a benefit to White. However after 37.e4!+- the engine calculates White will eventually break through, with ideas like Bf7 a threat. 35...Ne7 36.e4 Nc6+ 37.Ke3 e5 38.Bd5 exf4+ 39.Kxf4 Ne5 40.Bxb7 unfortunately Black can immediately regain the pawn. Nd3+ 41.Ke3 Nxb2 42.Bd5 Nd1+ 43.Kf4 Ke7 44.e5 Nc3 45.Bc6 Ke6 46.exf6 gxf6 47.gxf6 Kxf6 48.Be8 Nd5+ 49.Kg4 this starts a long maneuvering sequence. White cannot escape the knight's checks or trap it unless Black blunders. Ne7 50.Bb5 Nf5 51.Bd3 Ng7 52.Bc2 Ne6 53.Bb1 Nd4 54.Bd3 Nc6 55.Bb5 Ne5+ 56.Kf4 Ke6 57.Ba4 Kf6 58.Bb3 Nd3+ 59.Kg4 Nc5 60.Bc4 Nd7 61.Kf4 avoiding the fork on e5 Nc5 62.Ba2 Nd3+ 63.Kg4 Ne1 64.Bb3 Ng2 65.Kg3 Ne3 66.Kf4 Nf5 67.Kg4 Nd4 68.Bd1 showing the long-range power of the bishop Nb5 69.a4 Nc3 70.Bb3 a5 this was unnecessary and allows me to threaten to trap the knight, although it's still drawn. 71.Kf3 Ke5 72.Kg4 Ne4 73.Bc2 now I find this pinning idea, which has only one defense. Nc5?? this should lose, but in time trouble I am unable to find the full winning sequence, after starting it correctly. 73...Nd2 is the only move that still works for Black. 74.Bxg6 Kf6 75.Bc2 Nc4= 74.Kg5! Ke6 75.Kxg6+- Ke7 76.h5 Kf8 77.Kf6 Kg8 78.h6? normally it's a good idea to have a more advanced passed pawn, but in this case now it's a draw. The pawn is too close to the Black king, once the White one moves off to threaten the Black knight. 78.Ke5! Nxa4 this trick no longer works. 79.Bxa4 Kh7 80.Be8 and the White king is in the square of the Black pawn, while the bishop and h-pawn can protect each other. Kh6 81.Kd4+- White eliminates the last Black pawn while maintaining his own. 78...Kh8 79.Ke7 Nxa4 80.Bxa4 Kh7 81.Kd6 ½–½
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19 June 2025

FT article: The sports helping executives stay at the top of their game

The latest Financial Times article involving chess - "The sports helping executives stay at the top of their game" - sadly was evidently written by non-chessplayers. How could I tell? From this quote:

Chess is not a solved game: despite the computing advances, there is no known perfect way to play it. But for some, it is too controlled an environment to offer a window into the real world — too little emotion, too many pre-planned sequences. How much can you learn about life from a sport that machines play far better?

There are several things wrong with the above statement, but the primary tipoff was the "too little emotion" part - no one who has played a serious game would ever say that, including Magnus Carlsen when he loses. The part about not learning from life in anything that machines "play [or do] far better" would mean abandoning all sorts of activities in modern life. I suppose we should all stop writing and drawing now that generative AI exists?

The other chess quote from the article is more on point:

Demis Hassabis, co-founder of Google DeepMind, became a chess master aged 13. He attributes his early interest in AI to playing chess “and trying to improve my own thought processes”.

And I would say an article quote on tennis is also very applicable (see Chess vs. Tennis here for more parallels) and one of the reasons I enjoy chess as a pastime:

“There’s no favouritism, there’s no politics. You either win or lose based on how you perform in the moment.”

14 June 2025

Annotated Game #311: Karma in the KIA

Continuing the karma theme from Annotated Game #310, this last-round draw should have been a win for my opponent, who did a good job outplaying me in a Caro-Kann King's Indian Attack (KIA) middlegame. He then missed some defensive tactics leading to an imbalanced queen vs. rook and knight (and pawns) endgame, which I could have won.

In the KIA setup, Black has some unclear strategic decisions to make regarding where to put his light-square bishop (and when), along with keeping the center mobile or advancing with d5-d4. In this game I make bad choices in both cases and the punishment is enlightening. The other overall learning theme I came away with was the superiority of active defense, which is highlighted in several variations analyzed.


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1.e4 c6 2.d3 d5 3.Nd2 heading for the King's Indian Attack e5 4.Ngf3 Bd6 5.g3 Nf6 6.Bg2 0-0 7.0-0 Re8 8.Re1 Nbd7 this is the first real think for me now, although I had to concentrate a bit to remember to bring the rook out on the previous move. 8...Bg4 here also scores well in the database. 9.a4 a5 a near-automatic reaction. Black wants to play this anyway, to contest the b4 square, while also preventing White's pawn from advancing further. 10.Nf1 Nf8 next big think here, about the middlegame plan. The idea is to free up the Bc8 while preparing to go to g6 if necessary. 10...d4!? I considered to prevent White's next move, but I felt it was too committal. 11.c3 c5= 10...h6 this prophylactic move controls g5 and also acts as a waiting move, putting the question to White about what to do next, without committing Black unnecessarily. 11.Ne3 I assessed this as being stronger than it actually was, threatening to go to f5 and hit the Bd6. d4 11...Ng6!? would be more consistent with my previous move and leave the central tension in place. 12.Nf5 Bc7 and 13.exd5?? breaking up Black's center is of course now refuted by Bxf5-+ 12.Nc4 here the knight avoids being exchanged on f5, and after some thought I overly complicate matters in response. Bb4?! I liked the idea of controlling c3, but this just improves White's position in relative terms. 12...Bc7 simple and best, according to the engine. 13.c3 b5 14.axb5 cxb5 15.Na3 b4 16.Nc4 dxc3 17.bxc3 Ba6= 13.Bd2 the simplest response. Ng6?! passive defense. 13...Bg4= effectively gets the bishop into play, with the pin on the Nf3 protecting e5, and it can usefully exchange off White's good knight. 14.c3! White now seizes the initiative. Bc5?! 14...dxc3 15.bxc3 Bf8 15.cxd4± White gladly exchanges the central pawn and my strong bishop. Bxd4 16.Nxd4 exd4 17.f4 now the pressure is really on and I have trouble coming up with a good defense. Nf8? 17...Be6!? there is nothing better; here I did not adequately consider/calculate the pawn fork after 18.f5? 18.b3± 18...Bxc4! 19.fxg6 Be6= 18.f5+- White controls the center and his active pieces and advanced f-pawn threaten my king. N6d7 19.Nd6 Ne5 I decided to make a defensive exchange sac, since otherwise I felt White would simply squeeze me to death. 19...Re7 is the engine's choice, but with a similar idea in the variation 20.Nc4 Ne5 21.Nxe5 Rxe5 22.Bf4 Nd7± 20.Nxe8 Qxe8 21.Bf4 Nfd7 the idea is to set up as much of a blockade as possible. 22.Qc2 c5± White is up the exchange and has the two bishops, but my defense is starting to form. 23.Rad1 b6 24.h3 24.g4 is the hard-to-find engine move, with the point being Nxg4? 25.e5 with a discovered attack on the Ra8 Ra7 26.Qe2+- 24...Ba6 with my last minor piece now developed usefully, hitting d3, I've whittled White's advantage down some. 25.Qb3? this just loses a pawn, although I was too timid and also did not seriously calculate the idea of taking with the bishop on d3. Rb8?! 25...Bxd3! and if 26.Rxd3? I did not see 26.Qa3 Ba6 26...c4!-+ the knight protects the c-pawn, the crucial difference in choosing which piece to take with on d3. 26.Qc2 eliminating the pawn fork tactic. Qe7 developing the queen to a better diagonal. 27.Qe2 f6?! now is when active defense/counterattack would be best. However, I was still focused on creating a fortress. 27...b5 28.axb5 Bxb5= 27...g5!? 28.fxg6 hxg6 29.h4 c4 30.dxc4 Bxc4= followed by ...d3 is an idea I saw, but judged too risky. 28.g4 Qf7 eyeing the penetration possibility on b3 29.g5 again I miscalculate the defense. Kh8 29...fxg5 30.Bxg5 Qb3! 30.Kh1 Rg8?! 30...fxg5 31.Qf2 Nxd3 unfortunately this does not work objectively, but it was certainly a shock to my opponent, and I erroneously thought it was my best chance. 31...fxg5! eliminating the g-pawn first is necessary. 32.Bxg5 Nxd3 32.Rxd3 Bxd3 33.g6!+- Qe7 34.Qh4 Nf8 best and only move that does not immediately lose. My opponent appeared surprised, and was getting low on time. 35.e5?? attempting to increase the pressure, but this allows Bxf5-+ and he apparently missed this backwards bishop move. Black is now winning. 36.exf6 Qxf6 37.Bg5 Qxg6 38.Bd5 I now block with the wrong minor piece, having missed White's follow-up. Be6? 38...Ne6! and Black is now simply a winning amount of material up. 39.Rxe6! Nxe6 40.Be4 this is what I missed. Now I find the drawing continuation, which seemed to surprise my opponent. Qxe4+ 41.Qxe4 Nxg5= the engine rates this as a draw, but of course with the major imbalances involved either side could still blunder, especially since we were both low on time. I would say winning chances practically are with Black, due to the extra pawns. 42.Qf5 h6! now I should not have to worry about losing by force. 43.h4 Nh7 44.Qd7 Rf8?! 44...Nf6 much better having this move come with tempo, and the engine even assesses Black is now winning. 45.Qd6 Re8 46.b3 Kh7 47.Qxb6 Re5-+ 45.Qd6 Rf6 the idea was to maintain an easy draw with the 6th rank defense. 46.Qd8+ Rf8?! this was an unnecessary (and unintentional) pawn sac, but the evaluation stays the same. 46...Nf8 47.Qxb6 d3= the power of the advanced passed pawn outweighs the queenside pawn weaknesses for Black. 48.Qd6 c4 49.Kg2 Re8 50.Kf3 Nf6 51.Qd4 Re4 52.Qd8+ Kh7 53.Qxa5 Rxh4 54.Qf5+ now there is no way to escape the checks. Kg8 55.Qe6+ Kh7 56.Qd6?? 56.Qf5+= 56...Ne4? this is good enough for the draw, but the engine shows a win after 56...Rh3+! 57.Kg2 Rh5-+ as White cannot prevent the rook from going to d5 behind the passed pawn. 57.Qd5 d2 58.Qf5+ and we're back on the check circuit. Kg8 59.Qe6+ Kf8 60.Qc8+ Ke7 61.Qb7+ Kf6 62.Qc6+ Kg5 63.Qd5+ Kg6 64.Qe6+?? 64.Qc6+= 64...Kh7 unfortunately I didn't have enough time to calculate the alternative, so agreed a draw here. 64...Nf6!-+ without another check by White, Black's rook can now get behind the d-pawn, for example after 65.Qe2 65.Qd6 Rh3+ 66.Ke2 Rd3 65...Rh3+ 66.Kg2 Rd3 ½–½
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03 June 2025

Annotated Game #310: A just result (karma-wise)

I unexpectedly had two Whites in a row in this tournament, so was able to immediately rectify my error of an incorrect e3-e4 pawn push in Annotated Game #309 with an example of a correct e3-e4 pawn lever. The difference here is that Black closes the center early, making the pawn break possible since White's d-pawn cannot be undermined or exchanged as a result. My opponent then makes a tactical error which should have led to a loss, but I fritter away my advantage into an even endgame. A late blunder as we officially agreed a draw was bad, but given that I should have easily won earlier, perhaps it was just karma evening out.


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1.d4 d5 2.e3 Nf6 3.Bd3 e6 4.f4 c5 5.c3 Nc6 6.Nf3 c4 this decision by Black to close the center now makes the e3-e4 pawn lever White's main (correct) idea. 7.Bc2 b5 8.0-0 a5 9.Qe2 the idea is to support the e-pawn push, while getting the queen off the back rank. 9.Nbd2 followed by e4 is better for development, however. 9...Be7 10.Nbd2 b4 11.e4 while Black's queenside pawns are further advanced and therefore control more space, White's central play more than offsets this. a4 12.Ne5 Qc7 13.Nxc6 bxc3? after a long think, my opponent goes for this trick option, which should in fact lose. 13...Qxc6 14.e5 Ng8 and White only has a slight plus, but this must have looked unappetizing. 14.Nxe7! also played after a long think, to make sure it worked tactically. cxd2 15.Nxd5+- the key follow-up. Nxd5 16.Bxd2 Nf6 17.Bc3 another long think here. While this isnt bad, I should have prevented castling instead. 17.Bb4 and White's task is much easier with the king in the center. 17...0-0 18.d5?! this unnecessarily loosens central control and gives back much of White's advantage. 18.a3 is simple and locks up Black's a-pawn while giving the bishop a postential outpost on b4. 18.Rac1 also works after a3 19.bxa3 Rxa3? 20.Bb4! 18...Qb6+?! 18...exd5 19.e5 Re8± 19.Kh1± exd5 20.exd5?! an example of too-materialistic thinking. 20.e5! Bg4 21.Qe1 d4 22.Qf2+- a nice tactical finesse with the pin, which I did not see. 20...Re8 21.Qf3 Re3?! 21...a3 breaking up the pawns, one way or another, would essentially equalize. 22.Qd1?! 22.Qf2!+- again missing the pinning idea. 22...Bg4 23.Qd4 the best choice. 23.Bd4 Qd6= 23...Qxd4 24.Bxd4 Re2 25.Bd1 Rd2?! 25...Re4 26.Bxf6 seizing the chance to inflict structural damage on Black. Rxd1 27.Raxd1 Bxd1 28.Rxd1 gxf6± Black's fragmented pawn structure gives White an obvious edge, but as the saying goes, "all rook endings are drawn" 29.Kg1?! 29.a3 again is a key idea, preventing the advance of Black's a-pawn. 29...Kf8 29...a3!= 30.Kf2 now my opponent recognizes the idea of the a-pawn advance, eliminating Black's pawn weakness on the queenside, after which she can cover the kingside adequately. a3!= 31.bxa3 Rxa3 now it's a draw. 32.Rd2 32.Rc1 Rxa2+ 33.Kf3 Ra4= 32...Ke7 33.d6+ Kd7 34.Ke2 c3 35.Rc2 Kxd6 36.Kd3 f5 37.g3 Kd5 38.h3 h5 39.Rxc3 Rxa2 40.Rc2?? if exchanged, this is now a lost K+P ending. I was hallucinating under time pressure and did not see how Black's king could penetrate. However, my opponent also was tired of the struggle and took the draw. 40.Rb3 Rg2 41.Rb5+= 40.Ke3 Rg2 41.Kf3= ½–½
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