18.d4! [Black is slightly behind on development and his kingside is also somewhat weakened. Therefore, Grischuk correctly tries to open the game to exploit the position.]

18...e4 [18...exd4? 19.Rxe8+ Qxe8 20.Bxc6! bxc6 21.Qxd4 Qf8 22.c5 dxc5 23.Qc4+±]

19.d5 exf3 20.Rxe8+ [△d×c6]

20...Qxe8 21.dxc6 bxc6 22.Qxf3 Bd7 23.c5! [White ruins the opponent's queenside pawn structure.]

23...Qe5 [¹23...d5 24.Qg3+ Kf7 25.Qxc7±]

24.Bxc6 Bxc6 25.Qxc6 Rb8 26.cxd6 cxd6 27.Rb1+–

1–0

⚫️#138 (Strategy-Black to Move)
🔸Gholami Orimi,Mahdi (2375)
🔸Pourramezanali,A (2528)
🔸Bushehr IRI 2019

20...Re6! [This timely rook lift gives Black a devastating attack on the kingside.]

[20...Qd8!? 21.Qxd8 Raxd8 22.Bc3 Nd6÷; 20...Nd6?! 21.Qxd5 Nxb4 22.Qb3²]

21.Rfd1 Nh4 22.Nf1 Nf3+ 23.gxf3 Rg6+ 24.Ng3 exf3 25.Kf1 Rxg3–+

0–1

⚫️#138 (Endgame-Black to Move)
🔸Shankland,S (2725)
🔸Ding Liren (2813)
🔸Wijk aan Zee NED 2019

21...a5! [21...Bc8!? 22.g5 hxg5 23.Bxg5 Be6=; 21...Nd4? 22.Nxd4 exd4 23.f3+/=]

22.bxa5?! [22.Rd7! Bc8 23.Rc7 Nd8 24.bxa5 Bxg4=/+]

22...Nxa5 23.Rb1 Bc6 24.Nd2 Red8–+

⚫️#139 (Strategy-Black to Move)
🔸Moradi,A (2318)
🔸Daghli,Arash (2367)
🔸Bushehr IRI 2019

Unity Chess Strategy Multiple Choice 139
public poll

A) a3 – 15
👍👍👍👍👍👍👍 88%
@fantastic45, Gavin, Nikhil, Evan, Venkat, @hamidebh1384, @Somebody_Sophia, @RichardPeng, @AryanLeekha, مجید, Amir, Michael, Hansika, Matthew, Kasyap

C) Rf4 – 2
👍 12%
@Afshin3333, Vincent

B) Qe7
▫️ 0%

👥 17 people voted so far.

⚫️#139 (Endgame-Black to Move)
🔸Carlsen,M (2835)
🔸Mamedyarov,S (2817)
🔸Wijk aan Zee NED 2019

Unity Chess Endgame Multiple Choice 139
public poll

B) e3 – 24
👍👍👍👍👍👍👍 96%
@David_Civil, Ahmad, Mohammad, @fantastic45, Gavin, @Afshin3333, Nikhil, Evan, @mn_aut, Venkat, @hamidebh1384, @Somebody_Sophia, @RichardPeng, @AryanLeekha, مجید, @arash22_d, Amir, Vedant, Michael, Hansika, Alexader, Muggsy, Matthew, Kasyap

C) Kd4 – 1
▫️ 4%
Vincent

A) h5
▫️ 0%

👥 25 people voted so far.

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