15.Qf4!
The alert Bulgarian Grandmaster intends to exploit the undefended state of the rook on d8 to hinder Black's development.
15...b5
Instead, 15...e5 weakens Black's central squares without winning any material after 16.Qh4!. For example, 16...Rf8 17.Nc2, when the plan of 18 Rae1 and 19 Re3 is awkward to meet.
16.Qc7!
Stopping Black from playing 16...Bb7, when the threat of mate on g2 would buy him time for ...Nc6 with equality.
16...Qf8 17.Bd3 Rd7 18.Qf4 Bb7 19.Rae1
The rook threatens to decide matters with 20 Re3 and 21 Rg3+.
19...Qg7 20.Be4
Meeting the mate threat on g2.
20...Kh8 21.Re3+-
The alert Bulgarian Grandmaster intends to exploit the undefended state of the rook on d8 to hinder Black's development.
15...b5
Instead, 15...e5 weakens Black's central squares without winning any material after 16.Qh4!. For example, 16...Rf8 17.Nc2, when the plan of 18 Rae1 and 19 Re3 is awkward to meet.
16.Qc7!
Stopping Black from playing 16...Bb7, when the threat of mate on g2 would buy him time for ...Nc6 with equality.
16...Qf8 17.Bd3 Rd7 18.Qf4 Bb7 19.Rae1
The rook threatens to decide matters with 20 Re3 and 21 Rg3+.
19...Qg7 20.Be4
Meeting the mate threat on g2.
20...Kh8 21.Re3+-
14.Qe3!
It is better to deny the black queen any dark squares in the center before pushing her backward. Hence the second white queen move generates more energy than 14.f4 at once which would allow 14...Qc5.
An equally important point of Alekhine's maneuver is that Black is unable to castle queenside due to the attack on a7. This persuades Marshall to send his king to the kingside, where it is in range of White's mobile center pawns.
14...Bc6 15.0-0-0 0-0 16.f4 Qe6 17.e5
White's central pawns are bursting with energy. Marshall tries to fight against them using his pieces, but without the restraining influence of any black pawns, there's no way he can hold them back.
17...Rfe8 18.Rhe1+/-
It is better to deny the black queen any dark squares in the center before pushing her backward. Hence the second white queen move generates more energy than 14.f4 at once which would allow 14...Qc5.
An equally important point of Alekhine's maneuver is that Black is unable to castle queenside due to the attack on a7. This persuades Marshall to send his king to the kingside, where it is in range of White's mobile center pawns.
14...Bc6 15.0-0-0 0-0 16.f4 Qe6 17.e5
White's central pawns are bursting with energy. Marshall tries to fight against them using his pieces, but without the restraining influence of any black pawns, there's no way he can hold them back.
17...Rfe8 18.Rhe1+/-
Unity Chess Multiple Choice 541
public poll
B: a5 – 5
👍👍👍👍👍👍👍 63%
@Hamed_85, Jonas, Gavin, Ramesh, Jahanbakhsh
C; Qe8 – 3
👍👍👍👍 38%
Bryson, @RichardPeng, Michael
A: Re8
▫️ 0%
👥 8 people voted so far.
public poll
B: a5 – 5
👍👍👍👍👍👍👍 63%
@Hamed_85, Jonas, Gavin, Ramesh, Jahanbakhsh
C; Qe8 – 3
👍👍👍👍 38%
Bryson, @RichardPeng, Michael
A: Re8
▫️ 0%
👥 8 people voted so far.
Unity Chess Multiple Choice 542
public poll
A: Qa5 – 9
👍👍👍👍👍👍👍 60%
@Hamed_85, Jonas, Ramesh, Hosein, Jahanbakhsh, @Omid_kh7225, Yiyi, Uzlari kim bo`ladi, Michael
B: h4 – 4
👍👍👍 27%
Re, Gavin, Bryson, فیروزه
C: Re3 – 2
👍👍 13%
@eximius, @RichardPeng
👥 15 people voted so far.
public poll
A: Qa5 – 9
👍👍👍👍👍👍👍 60%
@Hamed_85, Jonas, Ramesh, Hosein, Jahanbakhsh, @Omid_kh7225, Yiyi, Uzlari kim bo`ladi, Michael
B: h4 – 4
👍👍👍 27%
Re, Gavin, Bryson, فیروزه
C: Re3 – 2
👍👍 13%
@eximius, @RichardPeng
👥 15 people voted so far.
A very interesting game between the 12th Women's #WorldChampion Alexandra Kosteniuk and the Uzbek chess prodigy, the third-youngest #grandmaster in history Nodirbek Abdusattorov at the 5th Purtichju Open.
https://t.co/9WBLvzwf9X
https://t.co/9WBLvzwf9X
chess24.com
Kosteniuk, Alexandra vs. Abdusattorov, Nodirbek | 5th Purtichju Open 2018
Replay the 5th Purtichju Open Round 8 game played on 06/07/2018 with computer analysis
37. Qf6??
Svidler has missed his only chance to draw.
37. Qg3+
A) 37...Rg7 38. Qb8+ Kf7 39. Rc2 Rg8 40. Qh2 =
B) 37... Kh8?? 38. Rg2
C) 37... Kf8 38. Rg2 Rf7 39. Qb8+ Ke7 40. Rc2 Rf8 41. Qe5 =
37... Rf7 38. Rg2+ Rg7 39. Rc2 f4 40. Qe5 Qe8 41. Rf2 Qc8 0-1
Svidler has missed his only chance to draw.
37. Qg3+
A) 37...Rg7 38. Qb8+ Kf7 39. Rc2 Rg8 40. Qh2 =
B) 37... Kh8?? 38. Rg2
C) 37... Kf8 38. Rg2 Rf7 39. Qb8+ Ke7 40. Rc2 Rf8 41. Qe5 =
37... Rf7 38. Rg2+ Rg7 39. Rc2 f4 40. Qe5 Qe8 41. Rf2 Qc8 0-1
44... Rd6??
Svidler throws away his winning position.
44... a4 45. Rxe6 Qf7 46. e5 a3
45. Qg6+ Kh8 46. Rxd6 Qxd6 47. Qe8+ Kh7 48. e5 Qd4 49. Qg6+ Kh8 1/2-1/2
Svidler throws away his winning position.
44... a4 45. Rxe6 Qf7 46. e5 a3
45. Qg6+ Kh8 46. Rxd6 Qxd6 47. Qe8+ Kh7 48. e5 Qd4 49. Qg6+ Kh8 1/2-1/2
16... Kf8!
An interesting prophylactic move in order to clear e8-square for his bishop.
17. Nc5 Be8 18. Qb3 Kg8 1-0
An interesting prophylactic move in order to clear e8-square for his bishop.
17. Nc5 Be8 18. Qb3 Kg8 1-0
23... Qxd8??
Gelfand's miscalculation. He could have created significant counterplay with the following continuation:
23... Qh6!! 24. fxg3 Qxe3+ 25. Kf1 Rh5
A) 26. g4 26... Qf4+ 27. Ke1 Qe3+ 28. Kd1 Qg1+ 29.Kd2 Qxd4+ 30. Ke2 Rh2 =
B) 26. Bc7 Rf5+ 27.Bf4 Qxg3 =
C) 26. Qc8 Rf5+ 27. Qxf5 gxf5=
24.fxg3 Qg5 25. Qb8 Qxe3+ 26. Kf1 Rh5 27. g4 Rg5 28.Rc3 Qxd4 29. Qxe8 Rxg4 30. Nd7 Rf4+ 31. Bf3 e3 32. Rxe3 +-
Gelfand's miscalculation. He could have created significant counterplay with the following continuation:
23... Qh6!! 24. fxg3 Qxe3+ 25. Kf1 Rh5
A) 26. g4 26... Qf4+ 27. Ke1 Qe3+ 28. Kd1 Qg1+ 29.Kd2 Qxd4+ 30. Ke2 Rh2 =
B) 26. Bc7 Rf5+ 27.Bf4 Qxg3 =
C) 26. Qc8 Rf5+ 27. Qxf5 gxf5=
24.fxg3 Qg5 25. Qb8 Qxe3+ 26. Kf1 Rh5 27. g4 Rg5 28.Rc3 Qxd4 29. Qxe8 Rxg4 30. Nd7 Rf4+ 31. Bf3 e3 32. Rxe3 +-