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📘 28. Rfb1

Topalov missed a winning continuation. He should not have given his opponent an opportunity to castle:
(28. Qxg7 Rf8 29. Rad1! With the idea of Rd8+! Bxf5 30. e6! Bxe6 31. Rfe1(idea R×e6!) Qe7 32. Ne5 a5 33. Ng4 f5 34.Qg6+ Rf7 35. Rxe6+-)
🔸Champions Showdown 2017
🔸Round 4
⚪️Dominguez Perez,Leinier (2739)
⚫️So,Wesley (2788)
🔸0-1
📘 34.Qb5? (34.Qd4) a6?
Dominguez's carelessness and Wesley So missing an opportunity
(34...Qg5! 35.Bf1 (Rg1 Re2+ -+) R×e1 36.R×e1 Qd2+ -+)
35.Qc5
⚫️#111 (Strategy-Black to Move)
🔸Miles,Anthony J (2565)
🔸Kortschnoj,Viktor (2665)
🔸Hoogovens Wijk aan Zee 1978
📕 20...Qe8! A typical move in such positions. Black intends to transfer his queen to h5 and continue his attack with ...g7-g5 and perhaps...Rh6.
20...g5 21.Nd4! Bxg2 22.Kxg2=/+ exchang pieces to ease the defence which is a strong idea when you are under attack.
20...Kh8? It is not logical to place your king on the same diagonal as the enemy queen.
⚪️#112 (Strategy-White to Move)
🔸Kortschnoj,Viktor
🔸Arnason,Jon L (2540)
🔸Beersheba, 1987
📕 19.Rc4! A very clever way to transfer the rook to the kingside. Viktor Korchnoi is known as a creative player.
19.b4!? and then a4 were also interesting moves to get more space on the queenside.
19.Ba3? It does not have any particular plan.
⚫️#113 (Strategy-Black to Move)
🔸Serper,Grigory (2575)
🔸Kortschnoj,Viktor (2665)
🔸Groningen 1993
📕Unity Chess Multiple Choice 113

B: Na4 – 12
👍👍👍👍👍👍👍 67%

A: c6 – 6
👍👍👍👍 33%

C: g4
▫️ 0%

👥 18 people voted so far.
⚫️#114 (Strategy-Black to Move)
🔸Kupreichik,Viktor D (2510)
🔸Kortschnoj,Viktor (2665)
🔸Muenster 1996
'📕Unity Chess Multiple Choice 114

B: Ng6 – 16
👍👍👍👍👍👍👍 67%

A: Nf5 – 5
👍👍 21%

C: Nc8 – 3
👍 13%

👥 24 people voted so far.
⚫️#113 (Strategy-Black to Move)
🔸Serper,Grigory (2575)
🔸Kortschnoj,Viktor (2665)
🔸Groningen 1993
16...Na4!
Black threatens ...c7-c6!, trapping White's wayward knight. if White's knight does move, then Black forks on c3.
16...c6 17.Nxd4 Na4 18.Be3 Nc3 19.Qc2 Nxb1 20.Rxb1 Although White has also obtained an exchange, his advantage has decreased.
16...g4? An aimless move that helps white strengthen his position: 17.Qc2! c6 18.Nxd4+/-
⚫️#114 (Strategy-Black to Move)
🔸Kupreichik,Viktor D (2510)
🔸Kortschnoj,Viktor (2665)
🔸Muenster 1996
13...Ng6!
Stronger than moving the knight to f5, the obvious square. Black's knight blocks out all g5-g6 line-opening ideas and also keeps control over f4 and h4.
13...Nf5 is a most natural move in this position because it attacks the base of white's pawn chain. However, Korchnoi's move is more accurate here.
13...Nc8? This move allows white to carry out the g6. 14.g6! fxg6 15.Rg1 With attack.
⚫️#115 (Strategy-Black to Move)
🔸Ivanchuk,Vassily (2475)
🔸Manor,Ilan (2405)
🔸Groningen 1986
📕Unity Chess Multiple Choice 115

B: b×a4 – 4
👍👍👍👍👍👍👍 40%

A: Re7 – 3
👍👍👍👍👍 30%

C: Nd7 – 3
👍👍👍👍👍 30%

👥 10 people voted so far.