Candidates R7: Nepo and Caruana score, again

by Carlos Alberto Colodro
6/25/2022 – Ian Nepomniachtchi and Fabiano Caruana have done it again. For a second day in a row, the frontrunners to take the title scored full points in Madrid. Nepo still leads Caruana by a half point, while Hikaru Nakamura now stands 1½ points behind Caruana in sole third place. It has become hugely unlikely for a player other than the tournament’s two protagonists to bounce back and win the whole thing. | Photo: FIDE / Stev Bonhage

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Still a 2% chance...

Fans of statistical analysis who also follow chess events have the privilege of getting free updates with relevant probabilities almost daily during important tournaments. The  data is crunched by Tai Pruce-Zimmerman, who maintains the site Chess by the Numbers since 2015.

Before the start of round 7, the probability of a player other than Ian Nepomniachtchi or Fabiano Caruana to win the title in Madrid would have been 31.3% — had both frontrunners lost their games on Saturday! Now that both grabbed full points for a second day in a row, it is nearly impossible for one of them not to win the event.

So far, the only player other than Nepo or Caruana to obtain a victory in Madrid is Hikaru Nakamura — the streamer stands in sole third place as the only player with a fifty-percent score. Importantly, Naka will face Caruana with the white pieces in Sunday’s eighth round.

A regrettable decision

Richard Rapport is having an eventful performance in Madrid. However, despite having played many interesting encounters, he had collected only draws until round 6. Somewhat ironically, his first decisive game saw him rejecting what would have been the easiest draw of the tournament for him.

Facing Nepomniachtchi’s Petroff Defence on Saturday, the Hungarian could have secured a quick draw had he chosen to repeat moves in a completely imbalanced position.

 
Rapport vs. Nepomniachtchi

Not surprisingly, this is a theoretical position. The contenders had all but blitzed out his moves up to this point, and Nepo’s 14...Bh3 was also played almost immediately.

The idea is that after 15.gxh3 Qg6+ 16.Kh1 Qe4+, White needs to decide whether to continue repeating to end the game and split the point, or to play f2-f3 against an opponent who is obviously prepared to face this line — and who, by the way, has been showing great results against a tough field!

Rapport chose the latter alternative.

 

Engines do not give this move as losing, but the move does put the burden on White to prove how to activate his undeveloped army effectively. Perhaps under different circumstances, this might have been a reasonable decision. However, choosing to keep the game going after spending almost 50 minutes trying to figure out whether to continue or not was definitely a practical mistake by Rapport.

Nepo blitzed out his next four moves, and not once spent more than 8 minutes on a single move until the end of the game. Rapport was down on the clock and had to deal with tough decisions one after another, all while facing the player who has been showing the best chess throughout the event.

The Hungarian saw it necessary to give up his queen. Nepo, in turn, was ruthless in the conversion of his advantage.

 

31...h4 is the strongest move in the position, and one that Nepo played after thinking for merely 72 seconds. For a fourth time in the tournament (after seven rounds!), the Russian obtained a full point by making the most of a direct attack on the kingside — a feat few could have predicted in an event with such a strong field.

GM Karsten Müller analysed the game, highlighting how little chances White had to defend. Rejecting the draw by repetition turned out to be the decisive mistake in the game.

 
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1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.0-0 0-0 8.c4 c6 9.Qb3 Bg4 10.Bxe4 dxe4 11.Ng5 Be7 12.Nxe4 Qxd4 13.Qxb7 Qxe4 14.Qxa8 Bh3 15.gxh3 Qg6+ 16.Kh1 Qe4+ 17.Kg1 Qg6+ 18.Kh1 Qe4+ 19.f3 Qd3 20.Kg2 Qg6+ 21.Kh1 Qd3 Nepo's h-pawn. An attack can continue in the endgame: 22.Nd2? This winning try brings White into large difficulties. The repetition draw 22.Kg2 Qg6+ 23.Kh1 Qd3 24.Kg2 was called for. 22...Qd7 23.Ne4?! 23.Re1 is the lesser evil, e.g. Bh4 24.Re4 Bf6 25.Nb3 Na6 26.Qxf8+ Kxf8 27.Kg2 Kg8 28.Be3 h6 and Black is better, but his attack is not as strong as in the game. 23...Na6 24.Qxf8+ Bxf8 25.Bf4 Qxh3 26.Rad1 h6?! 26...h5-+ was even stronger. 27.Bg3? 27.Be3 is more tenacious, but after Qe6 28.Bxa7 Qxc4 29.b3 Qe2 Black's attack continues. 27...Nc5 28.Rfe1 Ne6 29.a3?! Very slow, but the engines give Black a winning advantage anyway. h5 29...Nf4!?-+ 30.Rd3 Qf5 31.b4 h4! The most dangerous man comes closer and closer. 32.Bb8 32.Bxh4 is met by Nf4 33.Rd4 Ng6 34.Nd2 Nxh4 35.Rxh4 Qd3 36.Ne4 Qxf3+ 37.Kg1 Qxa3-+ 32...Ng5 32...c5!?-+ is favored by the engines, but Nepo's move wins as well. 33.Rde3 Nxe4 Of course not 33...Nxf3?? 34.Rf1= 34.fxe4 Qf2 35.h3 Be7 36.Bh2 36.Bxa7 is met by Bg5 37.Bc5 Bf4 38.R3e2 Qf3+ 39.Rg2 Qxh3+ 40.Kg1 Bh2+ 41.Rxh2 Qg3+-+ 36...Bg5 37.Bg1 Qd2 38.R3e2 Qd3 39.Be3 Bf6! The bishop must remain as attacking potential and to destroy the defensive coordination of White's rooks. Of course not 39...Bxe3?? 40.Rxe3 Qxc4 41.e5 and White will be able to defend. 40.Bxa7?! This loses by force. But White is lost in any case, e.g. 40.Rf2 Bc3 41.Ree2 Be5 42.Rg2 Qd7 43.Kg1 Qxh3-+ and Nepo's h-pawn will decide the day. 40...Qxh3+ 41.Kg1 After 41.Rh2 Qf3+ 42.Kg1 Qg3+-+ White loses one of his rooks. 41...Qg3+ 42.Kf1 42.Kh1 runs into Qf3+ 43.Kg1 Bc3 44.Re3 Qg4+ 45.Kf2 Qf4+ 46.Kg2 Bxe1 47.Rxe1 Qg3+ 48.Kf1 Qf3+ 49.Bf2 h3-+ 42...h3 43.Bg1 43.b5 h2 44.Rxh2 Qxh2 45.bxc6 Bh4-+ 43...Bh4 After 43...Bh4 44.Rf2 44.Bh2 Qf3+ 45.Kg1 Bxe1-+ 44...h2 Nepo's h-pawn has the last word due to 45.Rxh2 Qxe1+-+ 0–1
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WhiteEloWBlackEloBResYearECOEventRnd
Rapport,R2776Nepomniachtchi,I27730–12022C42FIDE Candidates Tournament 20227.1

Ian Nepomniiachtchi

Ian Nepomniachtchi checking out Fabiano Caruana’s game | Photo: FIDE / Stev Bonhage

An early surprise

While Rapport and Nepomniachtchi blitzed out their initial moves, Teimour Radjabov had Caruana thinking over the board as early as on move 3 — 1.e4 c5 2.Nf3 a6

 
Caruana vs. Radjabov

This move, which gives name to the Najdorf Defence if played further down the line, is almost never seen in top events, and Caruana was clearly not ready to face it in the Candidates Tournament.

After missing a clear chance to win in the previous round, Radjabov decided to prepare a strange sideline on the rest day. The plan backfired, as the ever-principled Caruana kept finding the most critical continuations in the ensuing position.

The one who deviated from theory first was the Azerbaijani, as he boldly chose to castle queenside after losing all the time advantage he had amassed in the opening on a single move.

 

Radjabov spent 26 minutes before playing the questionable 13...0-0-0, when castling kingside was perfectly sound in the position. Much like Rapport’s f2-f3, this move is not losing, but it does leave Black needing to demonstrate why he made such a decision.

The Azerbaijani was perhaps expecting to get a double-edged position after springing an early surprise, or maybe he was simply in a fighting mood. Unfortunately for him, though, Caruana has shown confident play throughout the event, and this was not the exception.

Later on, Caruana had an extra pawn in a queenless position with bishop against knight and four rooks still on the board. He also had managed to activate his king.

 

After 37.Kg6 Nxc3, a pawn race on opposite flanks eventually emerged, as Black soon captured White’s a-pawn while his opponent grabbed its counterparts on g7 and f6.

In the end, Black got to queen his pawn first, but White was the one who had the better coordinated pieces.

 

There followed 46...b1Q 47.f8Q Qg6+ 48.Qf6 Qe8+ 49.Kd6, and Black ran out of checks. With the strong light-squared bishop pointing at the queenside from f3, there was little Black could do to defend his monarch. Resignation came seven moves later.

Radjabov is now sharing last place with Alireza Firouzja, whom he will face with the black pieces in round 8.

 
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1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 e5 6.Nf5 d5 7.cxd5 Bxf5 8.exf5 Nd4 9.Bd3 Qxd5 10.Nc3 Qd7 11.0-0 Nf6 12.Bg5 Be7 13.Re1 0-0-0 14.Rxe5 Nc6 15.Bxf6 Bxf6 16.Rd5 Qe7 17.Bc4 Kb8 18.Qd3 Qb4 19.Bb3 Nd4 20.Qc4 Qxc4 21.Bxc4 Rc8 22.Bd3 Nc6 23.Be4 Rhe8 24.f3 Re7 25.Rad1 h6 26.Kf2 Rcc7 27.R5d2 Bxc3 28.bxc3 Ne5 29.Rc1 Caruana's king road. The activity of the king is often very important in an endgame: f6? This opens a road for Caruana's king. 29...Ng4+ 30.Kg3 Nf6 should be defendable. 30.Kg3 Ka7 31.Rd4 Rc5 32.Kh4 Rec7 33.Kh5 Caruana's king just marches on. b5 34.f4 Nd7 35.Rcd1 35.Bd5!?+- 35...Nb6 36.R1d3 Na4 37.Kg6 Caruana gives both queenside pawns as his play on the kingside is quicker. Nxc3 38.Bf3 Nxa2 39.Rd7 Nc3 40.Kxg7 b4 41.Kxf6 b3 42.Rd2! a5 43.Ke6 Rxd7 44.Rxd7+ Ka6 45.f6 b2 46.f7 b1Q 47.f8Q Now the fourth phase of the game has arisen. White's king is surprisingly safe. Qg6+ 48.Qf6 48.Ke7 Kb5 49.Qh8+- wins as well. 48...Qe8+ 48...Qxf6+ does not defend due to 49.Kxf6 a4 50.f5 a3 51.Rd2 a2 52.Rxa2+ Nxa2 53.Kg6 h5 54.f6 h4 55.f7 Rc8 56.Kg7 Rc7 57.Kg8 Rxf7 58.Kxf7+- 49.Kd6 Rc4 50.Rc7 50.Ra7+!? is a win in the 4th phase, e.g. Kxa7 50...Kb6 51.Rb7+ Ka6 52.Rb3+- 51.Qg7++- 50...Kb5 51.Qe5+ Qxe5+ 52.fxe5 Now White's e-pawn decides the day: Rxc7 52...Rd4+ 53.Ke7 Nd5+ 54.Bxd5 Rxd5 55.e6 a4 56.Kf6 Rd2 57.e7 Rf2+ 58.Ke6 Re2+ 59.Kd7 Rd2+ 60.Kc8 Re2 61.Kd8 Rd2+ 62.Rd7+- 53.Kxc7 White's bishop is much stronger than the knight in this race fight: Kc5 53...a4 54.e6 a3 55.e7 a2 56.e8Q++- 54.e6 Nb5+ 54...a4 55.e7 a3 56.e8Q a2 57.Qe1 Nb1 58.Qf2++- 55.Kd7 a4 56.e7 56.e7 Nd6 57.Bd1 a3 58.Bb3 h5 59.e8Q Nxe8 60.Kxe8 Kb4 61.Ba2 Kc3 62.Kf7+- 1–0
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WhiteEloWBlackEloBResYearECOEventRnd
Caruana,F2786Radjabov,T27531–02022B28FIDE Candidates Tournament 20227.4

Teimour Radjabov

Teimour Radjabov | Photo: FIDE / Stev Bonhage

Round 7 results

 

Standings after round 7

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Carlos Colodro is a Hispanic Philologist from Bolivia. He works as a freelance translator and writer since 2012. A lot of his work is done in chess-related texts, as the game is one of his biggest interests, along with literature and music.

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