Division I: Checkmate ends the game
It was a good day for the underdogs in the top division of the Chessable Masters. Jose Martinez, who won the Play-In stage on his 25th birthday, beat Ian Nepomniachtchi 3-1, and ended the match in style.
Nepomniachtchi v. Martinez - Game #4
The Peruvian GM had won the first game and drawn the next two. Nepo, a great fighter, went all-in in the fourth encounter, and chased the black king all the way to the queenside (it does not appear so, but Black castled kingside in this game). However, at the end it was Martinez who got to checkmate the opposite king with 42...Nd4#, as the rook on f4 is pinned!
Analysis by GM Karsten Müller
Most players prefer to attack rather than defend. But what is the correct way to do it? GM Dr Karsten Müller has compiled many rules and motifs to guide you, along with sharpening your intuition for the exceptions.
Martinez’s rival in the winners’ bracket semi-finals will be Denis Lazavik, who came from defeating Hikaru Nakamura and Anish Giri in the placement phase, and got the better of Maxime Vachier-Lagrave the very next day. The 17-year-old got his ticket to the semis by winning the Armageddon decider after agreeing to four draws ‘in regulation’.
Vladimir Fedoseev also beat a higher-rated opponent, albeit he is not so much of an underdog against pretty much anyone in the online-chess scene (except Carlsen and Nakamura). Fedoseev defeated Alireza Firouzja by winning games 2 and 4 after having lost the first encounter of the match.
In the one match that favoured the rating favourite, Carlsen defeated Wesley So by the smallest of margins in a rematch of last year’s final at the in-person event in Toronto.
The world number one scored the one victory of the match in game 3, as So ran out of time in the following position.
Black is surely the one with winning chances, but converting this into a full point is no trivial task, especially against a gifted technician. Apparently, So is struggling to make some adjustments to deal with the new time control of the tour, which has gone from 15+3 to 10+2 in this edition.
In the first game of the match, it was Carlsen who was a pawn down in a technical endgame — and he managed to escape with a draw, as analysed below by GM Müller.
Analysis by GM Karsten Müller
Division I winners’ bracket

All games - Division I
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1.Nf3 d5 2.g3 c5 3.c4 d4 4.b4 cxb4 5.a3 b3 6.Bg2 Nc6 7.d3 a5 8.a4 e5 9.0-0 Nf6 10.Qxb3 Bb4 11.Ba3 Nd7 12.Bxb4 axb4 13.Ne1 Nc5 14.Bxc6+ bxc6 15.Qxb4 Qa5 16.Nc2 Bh3 17.Qxa5 Rxa5 18.Re1 Kd7 19.f4 f6 20.fxe5 fxe5 21.Nd2 Rb8 22.Reb1 Rxb1+ 23.Nxb1 Nb3 24.Ra3 Nc1 25.Kf2 Bg4 26.Nd2 Bxe2 27.Ra1 Bxd3 28.Rxc1 Rxa4 29.Nf3 Kd6 30.Ncxd4 exd4 31.Nxd4 Rxc4 32.Rxc4 Bxc4 33.Nf5+ Ke5 34.Nxg7 Bf7 35.g4 Bg6 36.g5 Kf4 37.Ne6+ Kg4 38.Ke3 Bf5 39.Nd8 Bd7 40.Nf7 Be8 41.Nd6 Bh5 42.h4 Kxh4 43.Kf4 Bg6 44.Nb7 Kh3 45.Nc5 Kg2 46.Nd7 Kh3 47.Nc5 Bf7 48.Ne4 Kh4 49.Nf6 Bg6 50.Nd7 Kh3 51.Nf6 Kh4 52.Nd7 Kh3 ½–½
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Carlsen,M | 2901 | So,W | 2857 | ½–½ | 2024 | | Division I | 1.1 |
Fedoseev,V | 2791 | Firouzja,A | 2823 | 0–1 | 2024 | | Division I | 1.1 |
Nepomniachtchi,I | 2831 | Martinez Alcantara,J | 2724 | 0–1 | 2024 | | Division I | 1.1 |
Vachier-Lagrave,M | 2886 | Lazavik,D | 2763 | ½–½ | 2024 | | Division I | 1.1 |
Firouzja,A | 2830 | Fedoseev,V | 2784 | 0–1 | 2024 | | Division I | 1.2 |
Lazavik,D | 2766 | Vachier-Lagrave,M | 2883 | ½–½ | 2024 | | Division I | 1.2 |
Martinez Alcantara,J | 2734 | Nepomniachtchi,I | 2821 | ½–½ | 2024 | | Division I | 1.2 |
So,W | 2858 | Carlsen,M | 2900 | 0–1 | 2024 | | Division I | 1.2 |
Carlsen,M | 2907 | So,W | 2851 | ½–½ | 2024 | | Division I | 1.3 |
Fedoseev,V | 2793 | Firouzja,A | 2821 | ½–½ | 2024 | | Division I | 1.3 |
Nepomniachtchi,I | 2819 | Martinez Alcantara,J | 2736 | ½–½ | 2024 | | Division I | 1.3 |
Vachier-Lagrave,M | 2880 | Lazavik,D | 2769 | ½–½ | 2024 | | Division I | 1.3 |
Firouzja,A | 2820 | Fedoseev,V | 2794 | 0–1 | 2024 | | Division I | 1.4 |
Lazavik,D | 2771 | Vachier-Lagrave,M | 2878 | ½–½ | 2024 | | Division I | 1.4 |
Martinez Alcantara,J | 2738 | Nepomniachtchi,I | 2817 | 1–0 | 2024 | | Division I | 1.4 |
So,W | 2852 | Carlsen,M | 2906 | ½–½ | 2024 | | Division I | 1.4 |
Vachier-Lagrave,M | 2876 | Lazavik,D | 2773 | 0–1 | 2024 | | Division I | 1.5 |
Carlsen,M | 2823 | Fedoseev,V | 2729 | | 2024 | | Division I | 2.1 |
Martinez Alcantara,J | 2641 | Lazavik,D | 2553 | | 2024 | | Division I | 2.1 |
Firouzja,A | 2724 | So,W | 2742 | | 2024 | | Division I | 51.1 |
Vachier-Lagrave,M | 2755 | Nepomniachtchi,I | 2754 | | 2024 | | Division I | 51.1 |
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Division II: Aronian and Anton play four decisive games
Only one of the eight matches in Division II went to Armageddon — Jeffery Xiong beat Anish Giri with white in the sudden-death decider to remain in the winners’ bracket.
Meanwhile, the most exciting confrontation was the one facing Levon Aronian against David Anton. The Spaniard won game 1, but saw his opponent scoring three wins in a row from that point on to get overall victory.
A spectacular-looking variation was seen in game 4.
Aronian v. Anton - Game #4
Engines do not approve of 29.Re5, as they consider that White gives up his advantage with this flashy sacrifice. However, dealing with this idea is extremely difficult in a quick game.
Black can actually capture the rook with 29...fxe5, since after 30.dxe5 there is 30.Bb4, gaining a key tempo to then consolidate via 30...Qd4 31.Qe6, with an equal position.
Anton apparently saw ghosts, though, and faltered with 29...g5, allowing 30.Nf5 and White’s initiative is too strong. There followed 30...Bb4, attacking the queen — but now Aronian has 31.Rxd5, counterattacking to end up a piece to the good.
After 31...Qxd5 32.Qd3, White has a knight for a pawn, and a strong initiative on the kingside to boot. Aronian went on to get a 37-move win.
Division II winners’ bracket
The Ruy Lopez is one of the oldest openings which continues to enjoy high popularity from club level to the absolute world top. In this video series, American super GM Fabiano Caruana, talking to IM Oliver Reeh, presents a complete repertoire for White.

All games - Division II
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Division III: Dubov knocked out
This division moves a bit quicker than the other two, so a few strong players have already been eliminated on the first day of the knockout:
- Daniil Dubov lost to Alexander Grischuk and Amin Tabatabaei
- Kirill Shevchenko lost to Jaime Santos and Bogdan-Daniel Deac
- Rasmus Svane lost to Kacper Piorun and Christopher Yoo
All games - Division III
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- Start an analysis engine:
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In this video course, twenty-nine examples with multiple questions are presented in the interactive format, which is ideal for a range of playing strengths. Step by step you will be taken through the complex positions.
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