13. f4!
White parries the threat of ...Bxh2+ and intensifies his control of the dark squares.
13...Bb8 14. Na4 Ba7 15. Bd4 Bg4 16. Bxg4 hxg4 17. Rc1 Qd6 18. Qc2 Bxd4 19. exd4 O-O 20. Qxc6 Qa3 21. Qc2 Rac8 $1 22. Qb2 Qxb2 23. Nxb2 Rxc1 24. Rxc1 Re8 25. Kf1 +/-

🔸Biel Grand Master Tournament 2018
🔸Round 7
⚪️Georgiadis,Nico (2526)
⚫️Svidler,Peter (2753)
🔸1-0

23. Nd5 ?
White could have chosen a more stubborn defense with 23. Kc1!
A)23...Rh8 24. h5
B)23... Rxb4 24. Nd5 Ra4 25. Qxf7+
C)23... Qf8 24.Ng4 Rhh5 25. Qf6+ Kg8 26. Qxd4 =
23... f5! 24. exf5 Rxd5 25. f6+ Kh7 26. Qe4 Rhh5 27. Qe6 Qf8 28. Qd7+ Kh6 0-1

🔸Biel Grand Master Tournament 2018
🔸Round 8
⚪️Navara,David (2741)
⚫️Georgiadis,Nico (2526)
🔸½-½

36... Qe7?
Nico Georgiadis missed a chance to win.
36... Bxb5!
A) 37. Qxb5 Qe8 38. a4 Qxb5 39. Bxb5 Kg8 40. a5 Kf7 41. a6 Ke7 -+
B) 37. Bxe6 Rxc5 38. Bxf7 Rf5 -+
37.Bxe6 Qxc5 38. dxc5 Bxb5 39.Bg4 Rxc5 40. Bxe2=

⚪️#591 (Strategy-White to Move)
🔸Gormally,D
🔸Krush,I
🔸Oakham, 2000

Black has doubled pawns, but a ...c7-c5 break will no doubt be up his sleeve and the use of the d5-square is helpful too. The most accurate plan is:
13.Qg4! 0-0 14.Be2 Kh8 15.0-0 Nc6 16.Nxc4 Nxc4 17.Bxc4 Ba5 18.Bg5 Qd7 19.Qh4 Nb4 20.Ra1 Qc6 21.Bf1 Qb6 22.Ra3!
and Black resigned. --- There is no defence to 23 Rh3.

⚫️#592 (Strategy-Black to Move)
🔸Ljubojevic,L
🔸Kramnik,V
🔸Monaco (blindfold rapid), 2000

18...Rfb8 19.Bc2 Qb7 20.Re1 Nh7!
It's the best move, black's knight is tending on ideal " parking "d4.
21.Re3?
It is necessary: 21.Ba4 and if 21...Qa6, then 22.Bb5.
21... Qa6 22.Bd3 Bd7 23.Bf1 Ng5 24.Red3 Ne6 25.Ne3 Nd4
Full domination, white doesn't have space for any movement.
26.Nd5 Rb3
and White resigned. Yes, Kramnik saw all this with his eyes closed!

⚫️#593 (Strategy-Black to Move)
🔸Giddins,S
🔸Emms,J
🔸Isle of Man, 1999

Unity Chess Multiple Choice 593
public poll

C: Bf8 – 8
👍👍👍👍👍👍👍 62%
Jonas, Gavin, Nikhil, Ramesh, Vincent, @RichardPeng, مجید, Zhenrui

A: Red8 – 3
👍👍👍 23%
@Sophia_Peng, @Henrycaba, Rachel

B: g5 – 2
👍👍 15%
@hosssein_G, George

👥 13 people voted so far.

⚪️#594 (Strategy-White to Move)
🔸Fischer,R
🔸Spassky,B
🔸Belgrade (1st matchgame), 1992

Unity Chess Multiple Choice 594
public poll

B: Ra3 – 12
👍👍👍👍👍👍👍 86%
@Anasiri6889, Jonas, Gavin, Nikhil, Ramesh, @SteveWongso, Vincent, @RichardPeng, @Henrycaba, مجید, George, Zhenrui

A: Nh2 – 1
👍 7%
Esmaeil

C: a×b5 – 1
👍 7%
@Sophia_Peng

👥 14 people voted so far.

Van Gogh Museum, Amsterdam, 15th July 1974. Genna Sosonko and Jan Timman examine their portraits, part of an exhibition of amateurs' sketches of famous Dutch people.

@UnityChess

Sit there for five hours? Certainly not! A player must walk about between moves, it helps his thinking."

🔸 Alexander Kotov

@UnityChess

Viktor Korchnoi v. Mikhail Botvinnik, 11th round, 20th USSR-ch, Moscow, 15th December 1952. The first meeting at the chessboard of these legendary players.

@UnityChess

A young Peter Svidler.

@UnityChess

Iran, China Win Asia Titles
Iran men’s team and China women’s squad were crowned at the 20th Asian Nations Cup Chess Championship in Hamedan on Friday.