World Cup Highlights – Part 1

by Joshua Doknjas
7/28/2021 – The 2021 FIDE World Cup in Sochi, Russia has narrowed down the 206 starting participants to just 8 remaining players. Canadian FM Joshua Doknjas analyzes some of the most interesting games from the first half of the event. | Photos: Anastasiia Korolka (FIDE)
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Highlights

Dubov – Malakhov

Daniil Dubov played a brilliant attacking game against Vladimir Malakhov in the 3rd round of the event. Dubov had the opportunity to play one of his favourite opening setups against the Slav, which led to him seizing the initiative early in the middlegame. The double pawn sacrifice that followed provided Dubov’s pieces with excellent outposts and forced Malakhov to defend passively for the entire middlegame.

 
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1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 4...e6 5.g3 has been played a number of times by Dubov. 5.g3!? A rare move but not a surprise from Dubov, as he likes to sacrifice the c4-pawn in many lines of the Catalan and Semi-Slav. dxc4 6.Bg2 g6 7.0-0 Bg7 8.e4 8.a4 prevents ...b5, but Black achieves a very solid position after a5 9.e4 Na6 10.Qe2 Nb4 Instead of allowing this, Dubov prefers to ignore ...b5 and focusses on his own play. 8...0-0 9.Qe2 b5 10.a4!? A very nice move to set up attacking ideas in the centre, as we will see shortly. b4 11.Nd1 a5 12.Re1 13.Qxc4 is threatened next and there is only one way for Black to defend the c4-pawn. Ba6 12...Be6? also protects the c4-pawn, but runs into 13.e5 Nd5 14.Ng5 12...Nfd7!? 13.Qxc4 c5 might also have been playable, fighting for some counterplay on the queenside. Still, after 14.d5 Ba6 15.Qc2 c4 16.Be3 White is ready to attack on the kingside with h4-h5 or expand in the centre with e5. 13.e5 Nd5 14.e6! One of the key points behind Dubov's idea with 10.a4. The bishop on a6 has been distracted away from its defensive position on c8, allowing 14.e6 to be played. The e6-pawn severely hampers Black's development (the b8-knight is stuck) and controls some key squares around the king, so Malakhov looks for a way to remove it immediately. f5 14...f6?! 15.Ne3 followed by taking on c4 and Black is stuck with several undeveloped and passive minor pieces. 15.Ne5 Rf6 Also deserving attention was 15...Nc7 threatening both ...Nxe6 and ...Qxd4. However, Malakhov's choice of activating the f8-rook is a more natural way to remove the e6-pawn. 16.Nf7! There is no turning back any more. The e6-pawn will not survive, but in return Dubov receives active piece play and the initiative. Qc8 17.Ne3 17.Bg5? would be played, if it were not for c3! 18.Qe5 c2 17...Rxe6 18.Ng5 c3?! The inclusion of ...c3 turns out to be useful for White because the c-file is opened. 18...Rxe3 19.Bxe3 Nd7 19...h6 20.Nh3! followed by activating the knight on f4, where it can exchange off one of Black's best pieces (the d5-knight) or create threats on the kingside. 20.Ne6! is a very strong idea, trying to take on g7 and weaken Black's control over the dark squares. Bf6 21.Qd2 with good attacking prospects on the kingside. 19.Qc2 Rxe3 20.Bxe3 cxb2 21.Qxb2 Nd7 22.Rac1 Taking control of the opened c-file. N7b6 23.Qb3 Bb7 24.Bf4 Bf6 25.Ne6 Kh8 26.Bh6 Qg8 27.h4! Rb8 28.Rc5 Dubov has created excellent outposts for his pieces, which take away key squares from Black's pieces and prevent all possible pawn breaks. Ra8 29.Ng5 The d4-pawn is left unprotected in order to activate the rooks along the e-file. Ra7 29...Bxd4 runs into 30.Rxe7! and 31.Nf7+ next. 30.Rc2 Qe8 31.Re6 Bxd4 32.h5! Bf6 33.Rce2 Bxg5 There are far too many threats for Black to deal with. For example, 33...Ba6 34.Bxd5 Nxd5 35.Rxf6! Nxf6 36.Nf7+ wins. 34.Qb2+ Nc3 35.Bxg5 Nbxa4 36.Qa1 Kg8 37.Re1 Ba6 38.Bxc6 Qd8 39.Bxa4 Qd5 40.Bc6 1–0
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Dubov,D2714Malakhov,V26661–02021D15FIDE World Cup 20213.1

Carlsen – Wojtaszek

The Round 4 matchup between Magnus Carlsen and Radoslaw Wojtaszek featured two incredibly tense and complicated classical games. Both games saw Carlsen create attacks with the kings castled on the same side of the board. He achieved serious chances in both games, but Wojtaszek’s resourcefulness led to two draws and brought the match into tiebreaks.

The following game is the second classical game of their match, where Carlsen introduced a dangerous new idea against Wojtaszek’s Sicilian. Interestingly, the day after this game was played, Svidler successfully employed the same opening idea in his match with Vitiugov and advanced into the final 16.

 
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1.e4 The day after our main game was played, the following rapid game took place, where Carlsen switched to 1.d4 and broke the deadlock: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Bd3 c5 6.Nge2 d5 7.cxd5 cxd4 8.exd4 Nxd5 9.0-0 Nc6 10.Nxd5 exd5 11.Nf4 Bd6 12.Be3 Bxf4 13.Bxf4 Qf6 14.Be3 Nb4 15.Bb1 Bf5 16.Qb3 Bxb1 17.Raxb1 Qd6 18.a3 Na6 19.Rbc1 with a clear advantage that was converted excellently in 1-0 (48) Carlsen,M (2847)-Wojtaszek,R (2691) Krasnaya Polyana RUS 2021 1...c5 2.Nf3 d6 3.Bb5+ Nd7 4.d4 cxd4 5.Nxd4!? The first surprise. 5.Qxd4 is the main line by a wide margin. 5...Ngf6 6.0-0!? An interesting new idea by Carlsen. By delaying the development of the b1-knight, White can play for a Maroczy Bind structure with c4. However, the e4-pawn is left undefended, so it is important to consider what happens if Black takes on e4. 6.Bd3 was seen in ½-½ (32) Tari,A (2625)-Duda,J (2743) Wijk aan Zee 2021, so Carlsen's choice of 5.Nxd4 was not completely new at the top level. 6...a6 6...Nxe4? immediately is very poor. 7.Re1 and Black's position quickly falls apart because there is no time to develop and get the king out of the centre. d5 7...Nef6 8.Nf5 8.c4 7.Ba4 e6 Wojtaszek chooses one of the most solid development plans and doesn't enter any of the complications after ...Nxe4. 7...g6 8.c4 Bg7 9.Nc3 0-0 is another perfectly playable setup for Black. 7...Nxe4 8.c4 e6 9.Re1 transposes to 7...e6 8.c4 Nxe4. 7...e5 8.Nf5 Nxe4 9.c4! g6 10.Ne3 f5∞ leads to unclear play, but it is extremely dangerous to play this as Black against a well-prepared opponent. For example, 11.Nc3 Nxc3 12.bxc3 and it is not clear at all how Black should develop. 8.c4 Be7 Again, 8...Nxe4 is very dangerous in the following lines: 9.Re1 Nec5 10.Nc3 Be7 10...Nxa4? 11.Qxa4 Be7 runs into 12.Nd5! exd5 13.Nf5 11.Bxd7+ Nxd7 12.Rxe6! Ne5 12...fxe6? loses to 13.Nxe6 Qb6 14.Nd5 13.Rxe7+ is an excellent exchange sacrifice. One sample line is Qxe7 14.Nd5 Qd8 15.f4 Nc6 16.Qe2+ Kf8 17.Be3 with great compensation because of the active minor pieces and Black's misplaced king on f8. 9.Nc3 0-0 10.Qe2 Qc7 11.f4 Nb6 12.Bb3 e5 12...Bd7 is also fully playable, but Wojtaszek prefers a more direct approach. 13.Nf5 Bxf5 14.exf5 Rfe8 15.g4! exf4 It is very interesting that just one day after Carlsen introduced this fresh idea with 6.0-0!?, Svidler used it to win the rapid portion of his match with Vitiugov. In fact, they followed the game until move 15, when Vitiugov tried a sharp piece sacrifice: 15...d5!? 16.cxd5 Nfxd5 17.Bxd5 Nxd5 18.Nxd5 Qc5+ 19.Ne3 exf4 20.Rxf4 Bg5 21.Rf3 Rad8 22.Kf1 Qd4?! doesn't retain the pressure in view of 23.a4! Qe4 24.Ra3 Rc8 25.Rc3± 1-0 (45) Svidler,P (2714)-Vitiugov,N (2724) Krasnaya Polyana RUS 2021 16.Bxf4 Bf8? Winning a pawn (the c4 and g4-pawns cannot both be defended), but Carlsen obtains a powerful kingside initiative after this. 16...h6 17.h4 Nh7 is a solid option, setting up a defence on the dark squares. The strongest option was 16...Qc6! intending to meet 17.g5 with d5! 18.Qg2 Bc5+ 19.Kh1 dxc4 leading to the exchange of queens and equality. 17.Qg2 Nxc4 18.g5 Nh5 19.Nd5 Qc5+ 20.Kh1 b5 21.g6 Carlsen has developed a crushing attack over the past few moves and it is very difficult to see how Black should try to fight back. Rab8 22.Rad1 Nxf4 23.Rxf4 Perhaps there would have been less counterplay after 23.gxf7+ Kxf7 24.Nxf4 Kg8 25.f6 followed by activating the d1-rook. 23...Re5 24.Rh4 Rxf5 25.Bc2?? Missing Wojtaszek's next move. 25.Rxh7! threatens mate with Rh8+ and Qh3-h7#. fxg6 26.Qxg6 Rxd5 27.Rg1 Rb7 28.Bc2 and Rh8 followed by Qh7# next. 25...Qf2! Threatening the rook on h4 and the exchange of queens. 26.gxf7+ Kxf7 27.Bxf5? There was still a win with 27.Qe4! Qf3+ 28.Qxf3 Rxf3 29.Kg2 but this one was quite difficult to play. Especially considering the effect 25...Qf2! must have had on Carlsen. 27...Qxh4 Suddenly the flow of the game has completely shifted and Carlsen should be a bit careful to maintain the balance. 28.Rf1 Kg8 29.Rf4 Qe1+ 30.Rf1 Qe5 Wojtaszek avoids the repetition but Carlsen finds a very nice resource, despite being extremely low on time. 30...Qh4 31.Rf4= 31.Qh3! Qxd5+ 32.Rf3 Now there is no choice but to accept a draw because Qxh7 and Be6 are threatened. Qd1+ 33.Rf1 Qd5+ 34.Rf3 Qd1+ ½–½
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Carlsen,M2847Wojtaszek,R2691½–½2021B51FIDE World Cup 20214.2

Ivic’s Attacking Play

Compared to previous World Cups, there are quite a few lower rated players in the remaining 16. One of these players is Velimir Ivic, who has scored three upsets in a row by winning his matches against Francisco Vallejo Pons, Matthias Bluebaum, and Dmitry Andreikin. Ivic’s games with the White pieces have been especially impressive because he demonstrated strong preparation in sharp lines of the French and Caro-Kann and launched crushing attacks.

 
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1.e4 e6 2.d4 d5 3.Nc3 Nf6 In the classical portion of his Round 4 match against Dmitry Andreikin, Ivic launched another powerful attack against the French. 3...dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Be3 Bd6 Ivic and Andreikin head down one of the sharpest lines in the Rubinstein French. 8.Bd3 0-0 9.Qe2 b6 10.0-0-0 Bb7 11.Kb1 c5 12.Bg5 Qc7? Accepting doubled pawns on the kingside is an extremely risky approach. Stronger is 12...h6 13.Bh4 Rc8 as Georg Meier, an expert on the Rubinstein, has defended several times with the Black pieces. 13.Bxf6 gxf6 14.d5 Bxd5 15.Nh4 Rfd8 16.Qh5 soon led to a winning position in ½-½ (51) Ivic,V (2582)-Andreikin,D (2724) Krasnaya Polyana RUS 2021, but Andreikin created enough counterplay to draw the game. 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3 a6 8.Ne2!? This slightly unusual looking move has become fashionable recently, largely due to the effectiveness of the plan employed by Ivic in the game. Qb6 9.Qc1 Be7 10.c3 f6 10...0-0 11.h4 f6 12.h5 is another move order to reach the position in the game. 11.h4! A very strong plan, which has only been noticed recently because the newer engines have a much greater appreciation for the h4-h5-h6 idea. In the 2017 World Cup, Wesley So tried a quieter approach: 11.exf6 Nxf6 12.dxc5 Bxc5 13.Bxc5 Qxc5 14.Ned4 but didn't obtain much out of the opening after 0-0 15.Be2 Bd7 16.0-0 Rae8 17.Qe3 Ng4 18.Qd2 e5 19.fxe5 Ngxe5 20.Nxe5 Nxe5 1/2-1/2 (46) So,W (2810)-Bluebaum,M (2646) Tbilisi 2017 11...0-0 12.h5 Qa5?! Underestimating White's h5-h6 plan, which will create some long-term weaknesses on Black's kingside. 12...h6 13.Rh3 Qa5 14.Kf2?! Stronger is 14.Bd2 Qd8 15.Qc2 with a complicated middlegame, but one where White should have the slightly better chances. 14...cxd4 15.cxd4 fxe5 16.fxe5 Ndxe5! is an excellent example of when the piece sacrifice is very effective. 17.dxe5 Nxe5 18.Kg1 Ng4 19.Rg3 19.Bd4?! runs into e5! exploiting the rook on h3. 20.Nxe5 Nxe5 21.Bxe5 Bxh3 19...e5 0-1 (79) Aronian,L (2781)-Bluebaum,M (2670) chess24.com INT 2021 13.h6! g6 14.Kf2 cxd4?! Playing for the same piece sacrifice idea that we saw in the Aronian - Bluebaum game above, but in this case it is not as effective. 14...b5 was a better try, at least here the middlegame remains complicated. Following 15.Kg1 b4 16.Rh3 Rb8 17.a3 (slowing down Black's queenside play) bxc3 18.bxc3 c4 19.g4 White has good attacking prospects on the kingside. 15.cxd4 fxe5 15...g5!? undermines White's centre, but it can be ignored. 16.Kg1 gxf4 17.Nxf4 fxe5 18.dxe5 Ndxe5 19.Nxe5 Nxe5 20.Rh3 with a powerful kingside attack incoming. 16.fxe5 Ndxe5 17.dxe5 Nxe5 18.Kg1 Compared to the piece sacrifice in the 12...h6 variation, White's rook is tucked away safely on h1 and there are dark-squared weaknesses on Black's kingside. Ng4 18...Nxf3+ 19.gxf3 Rxf3 20.Bg2 Rf7 21.Bd4 followed by activating the major pieces, while Black is lacking active play. Additionally, the weak g7 and h8 squares will be very annoying to defend. 19.Bd4 Bd7 20.Qe1! Transferring the queen to a more active location on the kingside. Qd8 21.Qg3 e5 22.Nxe5 Bd6 23.Qb3 Bxe5 24.Bxe5 Qg5 25.Bd4 Rf7 26.Qg3 Raf8 27.Rh4 Qf5 28.Rxg4! The dark squares are the decisive weakness in Black's position. Qxg4 29.Qe5 Rf6 30.Nc3 Bc6 31.Nxd5 1–0
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WhiteEloWBlackEloBResYearECOEventRnd
Ivic,V2582Vallejo Pons,F27101–02021C11FIDE World Cup 20212.1
 
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1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.c3 Bd6 7.Bd3 0-0 8.Qc2 Re8+ 9.Ne2 h5! In recent years, this flank advance has sparked a surge in popularity for the 4...Nf6 system. 10.0-0 h4 11.h3 Nd7 12.Bd2!? A slightly unusual move, but a very dangerous one. In comparison to the natural 12.Be3, it is possible for White to advance his f-pawn in these lines. 12.Be3 Nf8 13.Rae1 and White cannot advance the f-pawn. 12...Nf8 13.Rae1 Be6 In view of the f4-f5 plan executed in the game, a better choice was 13...Bc7 14.f4 14.c4 Ne6 demonstrates another point behind 13...Bc7, the d-file is opened for the queen. 14...g6! 15.f5 g5 is a stronger way of meeting the f4-f5 plan, though the game could still explode if White decides to open up the kingside with g3 at some point. 14.f4! The threat of 15.f5 cannot be stopped and suddenly Black's position becomes very critical. Qc7? A better try was 14...c5! 15.f5 Bd7 16.d5 b5 with good chances for counterplay on the queenside. 15.f5 Bd7 16.c4 b6 17.b4! Playing on both sides of the board creates tremendous problems for Black. c5 18.dxc5 bxc5 19.b5 It is very difficult to see how Black can create counterplay in this position. Bluebaum decides to activate his f8-knight via h7-g5, but this allows Ivic to create a strong kingside attack. Nh7 20.Nc3 Ng5 21.Nd5 Bh2+ 22.Kh1 Qd6 23.Rd1! Avoiding the exchange of rooks and preparing to break through on the kingside. The immediate 23.Bxg5? is met by Rxe1 24.Rxe1 fxg5 and White doesn't have a rook on f1 to support the f6 advance. 25.f6 gxf6 23...Be5 24.Bxg5 Shows the downside of Bluebaum's ...Nh7-g5 plan. The kingside is opened and Ivic is close to creating a decisive attack. fxg5 25.f6 Bd4 26.Bh7+ Kh8 27.fxg7+ Kxg7 28.Nf6? A very tempting idea, bringing another piece into the attack and creating many threats around Black's king, but there was a much stronger alternative. 28.Bf5! exchanges off an important defender. Bxf5 29.Qxf5 f6 when White can break through in several ways. The simplest is probably 29...Qg6 runs into 30.Nc7 30.Qg4 Or if Re6 then there is 31.Nc7! 28...Re5! Centralizing the rook is a strong defensive resource, which allows Bluebaum to stay in the game. 29.Be4 29.Bg8 is one of the ideas behind 28.Nf6, but Black has Bf5! which crushes White's hopes of a kingside attack, for example, 30.Rxf5 Rxf5 31.Qxf5 Qxf6 32.Qh7+ Kf8 29...Rh8 30.Bd5 Be6 31.Ng4 Rxd5 32.cxd5 Bd7? The g4-knight had to be exchanged. Now Ivic targets the weaknesses on Black's kingside and launches the final attack. 32...Bxg4! 33.hxg4 h3 34.g3 Re8 but not 34...Qxg3?! 35.Qe2! when White's major pieces quickly become very active. 35.Qf5 f6 followed by activating the rook. 33.Qc1 Rh5 34.Rxd4! Eliminating an important defender. cxd4 35.Nf6 Rh6 36.Qxg5+ Rg6 37.Nh5+ Kf8 38.Qxh4 Bxb5 39.Rb1 Bc4 40.Rc1 Ba6 41.Qxd4 Bb7 42.Qh8+ Rg8 43.Qb2 Rxg2 44.Kxg2 Bxd5+ 45.Kf1 1–0
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Ivic,V2582Bluebaum,M26691–02021B15FIDE World Cup 20213.1

Velimir Ivic | Photo: Anastasiia Korolka (FIDE)

Tabatabaei – Yu Yangyi

In Rounds 3 and 4, Amin Tabatabaei scored two upsets against Yu Yangyi and Pentala Harikrishna by winning the classical portion of both matches 1.5-0.5. His two wins against these 2700+ Grandmasters had a completely different character. The game against Yu Yangyi was won with a very aggressive style, as Tabatabaei chose a sharp variation of the Italian opening and sacrificed a piece to create a decisive kingside attack. In the following match, the Iranian Grandmaster outplayed Harikrishna in an endgame and exploited a mistake on move 30 to take the full point.

Tabatabaei’s win against Yu Yangyi is analyzed below.

 
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1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Bc5 5.c3 d6 6.Bg5 h6 7.Bh4 a6 8.a4 Qe7 The ...Qe7 idea has become very popular in recent years, especially after it was used in the following game by Kramnik: 8...Ba7 9.Nbd2 Qe7 10.h3?! Since the game was played, theory has developed rapidly in this line and suggests that 10.0-0 is much stronger. Even though Black's upcoming kingside play appears to be very dangerous, White can create play on the queenside (b4-b5) and in the centre with d4. 10...g5 11.Bg3 Nh5 12.Qe2 Qf6 13.Bh2 Nf4 14.Bxf4 gxf4 15.g4 Ne7 16.b4 Ng6 17.Kd1 h5 0-1 (36) Anand, V (2767)-Kramnik,V (2787) Wijk aan Zee 2018 9.0-0 Ba7 10.Nbd2 0-0 Now the queen seems to not have a purpose on e7, but the point will be revealed in a few moves. A much more aggressive approach with 10...g5 11.Bg3 Nd7! is more popular. The game becomes very sharp and dangerous for both sides after 12.b4 Nf8 13.b5 Nd8 14.d4 Ng6 15.h3 h5 as tried in 1-0 (41) Dominguez Perez,L (2763)-Grischuk,A (2759) Khanty Mansiysk 2019. Understandably, Yu Yangyi wanted to avoid his opponent's preparation in these sharp positions and instead plays a quieter alternative. 11.Re1 11.b4 Be6 transposes to a recent game between Giri and Grischuk. 12.b5 Nb8 13.d4 axb5 14.Bxe6 Qxe6 15.Bxf6 Qxf6 16.axb5 Nd7 17.Nc4 Qe6 led to a roughly balanced middlegame in ½-½ (42) Giri,A (2780)-Grischuk,A (2776) Bucharest 2021 11...Be6 12.b4 Bxc4 13.Nxc4 Qe6! The queen maneuver from e7-e6 has sidestepped the pin created by White's bishop and there are now ideas of playing ...Ne7-g6. Still, White has a lot of space on the queenside and good chances to put Black under some pressure. 14.b5 Ne7 15.Rb1 Deviating from a rapid game between Wesley So and Carlsen. 15.Bxf6 Qxf6 16.Rb1 axb5 17.axb5 perhaps 17.Rxb5 was slightly stronger to create play on the queenside. 17...Ng6 18.g3 Rfc8 19.Kg2 Nf8 and Black was very solid in 0-1 (85) So,W (2770)-Carlsen,M (2847) chess24.com INT 2021 15...Nd7 15...g5 16.Bg3 Nd7 17.h4 f6 leads to a tense and complicated middlegame. 16.Bxe7 Otherwise, Black would likely play ...g5 and ...f5. Qxe7 17.d4 Qe6 18.Qd3 Nb6?! The two misplaced minor pieces on the queenside suggest that White should create play on the other side of the board. 18...axb5 19.Rxb5 Rfe8 was preferable, at least here there is some pressure on White's centre. 19.Ne3 a5 20.Nd2 Rfd8 21.Nf5 h5 22.Qg3 22.Re3! may have been even stronger, Rg3 next will force a weakness on the kingside. 22...g6? 22...Qf6 doesn't create a weakness on the kingside. 23.Re3 Kh8 24.Rf3 Qg6 and Black is hanging on. 25.Qh4 would be met by Qg4 23.Re3 Kf8 24.Qg5! The most energetic and strongest option, sacrificing the knight on f5. In return, all of White's major pieces become extremely active. gxf5 25.exf5 Qa2 26.Rbe1 Nd5 26...Qxd2 loses to 27.Qh6+ Ke8 28.Rxe5+ dxe5 29.Qxd2 27.Rh3 Ke8 28.f6+- There is no escape for the king on e8. c6 29.c4 Nxf6 30.dxe5 dxe5 31.Rxe5+ Kd7 32.Rd3+ Kc7 33.Re7+ Nd7 34.Qe5+ Kc8 35.Rexd7 Bb6 36.Rxd8+ Bxd8 37.b6 1–0
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WhiteEloWBlackEloBResYearECOEventRnd
Tabatabaei,M2613Yu,Y27051–02021C54FIDE World Cup 20213.1

M. Amin Tabatabaei | Photo: Anastasiia Korolka

The second part of this article will follow soon and examine the most interesting games of the remaining players.

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Joshua Doknjas is a FIDE Master from Canada and the author of two books on the Sicilian Najdorf and Ruy Lopez. He enjoys teaching, following, and writing about chess. Joshua is especially interested in the role of engines during opening preparation and understanding how AI has influenced modern chess.

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