13.axb5?! [13.Bxe7! Attempting to exploit the weak dark squares in the opponent's camp. 13...Nxe7 14.Nce4 Bxe4 15.Nxe4 Nf5 16.axb5 0–0 (16...cxb5 17.d5±) 17.Bxc4 cxb5 18.Bd3 Qxd4 19.Ng5! Qxh4 20.Bxf5 exf5 (20...Qxg5 21.Be4+–) 21.f4 Nc6 22.e6±; 13.Bf3!? Bxg5 14.hxg5 bxa4 15.Nge4 0–0 16.Nxa4 Qd8 17.Nac5 Nd7 18.Nb7 Qc7 19.Nbd6 Rab8 20.Nxc4 Rb4 21.Ned6 h4 22.Rc1 Rfb8 23.Be4±]

13...Bxg5 14.hxg5 cxb5 15.Bf3 Nc6 [15...Nxc3? 16.bxc3 Nc6 17.Ne4 Bxe4 18.Bxe4 Rd8 19.Ra2! Nxe5 20.Qe2 Ng4 21.f3 Ne5 22.Rfa1±]

16.Bxd5 exd5 17.Nxd5 Qd8 18.Qf3+/=

1–0

⚪️#232 (Endgame-White to Move)
🔸Westerberg,J (2534)
🔸Brynell,S (2409)
🔸Bistro Stella 2018

38.Qf6! [38.g3? Qg4 39.Qc7 Qxh5 40.Qxa7 Qd1+ 41.Kh2 Kg6 42.Qxb6 Qd2 43.Kg2 Qd5+ 44.Kh2 Qd2=; 38.Qc7? Kg7 39.h6+ Kg6 40.Qxa7 Qb1+ 41.Kh2 Qd1 42.Qxb6 Qh5+ 43.Kg3 Qg5+ 44.Kh2 Qh5+=]

38...Kg8 39.h6? [39.Qd8+ Kg7 40.h6+! Kxh6 (40...Kh7 41.Qf6 Qg4 42.Qxf7+ Kxh6 43.Qxe6+ Kg7 44.Qd7+ Kf6 45.g3+–; 40...Kg6 41.Qh8 Qg4 42.Qg7+ Kh5 43.Qxg4+ Kxg4 44.h7) 41.Qf6+ Kh5 42.Qxf7+ Kh6 43.Qxa7 b5±]

39...Qg4 40.h7+ Kxh7 41.Qxf7+ Kh8 42.Qxe6 Qd1+ 43.Kh2 Qh5+ 44.Kg1

½–½

🔸ch-RUS Rapid GP Final 2018
🔸Round 2
⚪️Shuvalova,Polina (2441)
⚫️Morozevich,A (2656)
🔸1-0

39.Bb5! [Now the knight has no reasonable squares to go to.]

[39.Qe8? Qd4+ 40.Kh1 Nc5! △N×d3 41.Re7+ Rxe7 42.Qxe7+ Kg8 43.Be8 Qh4+ 44.Kg1 Qd4+=]

39...Nc5? [¹39...Nb8™ would put up more resistance, although White's position is still much better after 40.Qe8! Rf7 41.Kh2 Qc7+ 42.Qe5+ Qxe5+ 43.Rxe5±]

40.Rc1! [△R×c5]

40...Qf6 41.Rxc5+–

⚪️#233 (Strategy-White to Move)
🔸Aleksandrov,A (2599))
🔸Babazada,Khazar (2269)
🔸Baku Open 2018

Unity Chess Strategy Multiple Choice 233
public poll

B) Bb3 – 9
👍👍👍👍👍👍👍 75%
@mahyarebrahimi1983, @fantastic45, S.f, Nikhil, Majid, Alexander, @SophiaCat_does_Chess, Atharva, PR

C) B×b6 – 2
👍👍 17%
@RahmaniArapardaz, @hosssein_G

A) b3 – 1
👍 8%
@A_Wild_Richard

👥 12 people voted so far.

⚫️#233 (Endgame-Black to Move)
🔸Fier,A (2553)
🔸Suleymanli,Aydin (2313)
🔸Baku Open 2018

Unity Chess Endgame Multiple Choice 233
public poll

C) Q×a2 – 6
👍👍👍👍👍👍👍 55%
S.f, Nikhil, Alexander, @Sophia_Giraffe, Atharva, Michael

A) Qd5 – 3
👍👍👍👍 27%
Masoud, @oalways, Majid

B) Rc8 – 2
👍👍 18%
@fantastic45, @A_Wild_Richard

👥 11 people voted so far.

Round 2 of the Keres Memorial tournament in Tallinn (Estonian SSR), February 1977.
Among the pairings: Tal-Ornstein, Unzicker-Velimirović, Gipslis-Bronstein, Romanishin-Nei, Vadasz-Gulko.

@UnityChess

"Do not calculate complicated lines before you are absolutely sure it is necessary."

🔸 Mark Dvoretsky

@UnityChess

Havana, 26th Aug 1965. Ex-World Champion Vasily Smyslov is pictured in play v. Bobby Fischer in the 2nd round of the Capablanca Memorial.
The American's moves were famously transmitted via telex, as he had been unable to obtain a visa.

@UnityChess

Robert James Fischer 🆚 Vasily Smyslov

Havana (1965), Havana CUB, rd 2, Aug-26
Spanish Game: Morphy Defense. Anderssen Variation (C77) ·

1-0

@UnityChess

I can see Tal's confidence and he is determined to win ... 😎

@UnityChess

The Group A of the 2019 #SummerChessClassic, held from 18-28 June in the St. Louis Chess Club, features Polish GM Jan-Krzysztof Duda (2729) as top seed fighting for the $12000 first prize.