27... Qa3?
Black should have saved a tempo with 27... Qd7!
27... Qd7! 28. Rxa2
A) 28. Kg2 Qxd4 29. Rxa2 c3 30. Rc2 Rfe8 -+
B) 28... Qh3+ 29. Kg1 Qxh4 30. f4 Rb8 31. Ra1 Rb3 -+
28.Kg2 Qc3 29. Rxa2 Qxd4 30.Rd2 Qe5 31. f4 Qe7 =/+
Black should have saved a tempo with 27... Qd7!
27... Qd7! 28. Rxa2
A) 28. Kg2 Qxd4 29. Rxa2 c3 30. Rc2 Rfe8 -+
B) 28... Qh3+ 29. Kg1 Qxh4 30. f4 Rb8 31. Ra1 Rb3 -+
28.Kg2 Qc3 29. Rxa2 Qxd4 30.Rd2 Qe5 31. f4 Qe7 =/+
35... Qh1+
Prohaszka could have obtained a clear advantage with the following continuation:
35... Qb7! 36. Rh6 Qb1+ 37. Kg2 Qxc2+ 38. Kg1 Qb1+ 39. Kg2 Qb2+ 40. Kg3 c2 0-1
36. Kf2 Qh2+ 37. Kf1 Qh1+ 38. Kf2 Qh2+ 39. Kf1 Qf4+ 40. Rf2 Qc4+ 41. Re2 Qf4+ 42. Rf2 Qc4+ 43. Re2 Qf4+ 44. Rf2 Qc4+ 45. Re2 Qf4+ 1/2-1/2
Prohaszka could have obtained a clear advantage with the following continuation:
35... Qb7! 36. Rh6 Qb1+ 37. Kg2 Qxc2+ 38. Kg1 Qb1+ 39. Kg2 Qb2+ 40. Kg3 c2 0-1
36. Kf2 Qh2+ 37. Kf1 Qh1+ 38. Kf2 Qh2+ 39. Kf1 Qf4+ 40. Rf2 Qc4+ 41. Re2 Qf4+ 42. Rf2 Qc4+ 43. Re2 Qf4+ 44. Rf2 Qc4+ 45. Re2 Qf4+ 1/2-1/2
39... Re8
Missing a golden opportunity to gain an advantage.
39... Rxa2+ 40. Bxa2 Rxb4! 41. Rxd5 Qh4+ 42. Kf1 Rb8 43. Rd1 Bf5 44. Kg1 Bd3 -+
40. Bc2 Rxc3 41. Bh7+ Kxh7 42. Qxc3 Bf5 =
Missing a golden opportunity to gain an advantage.
39... Rxa2+ 40. Bxa2 Rxb4! 41. Rxd5 Qh4+ 42. Kf1 Rb8 43. Rd1 Bf5 44. Kg1 Bd3 -+
40. Bc2 Rxc3 41. Bh7+ Kxh7 42. Qxc3 Bf5 =
65. Rb8 ??
Dutch GM Benjamin Bok could have forced his opponent to resign:
65. gxf5+!
A) 65...Bxf5 66. Qe8+ Kg5 67. Qe7+ Kf4 68. Re1+-
B) 65... Kxf5 66. Rf8+ Kg6 67. Qg3+ Kh7 68. Rg1 Qb7 69. Qg6#
65... Qxb8 66. Qxe6+ Kh7 67. Qxf5+ g6 68. Qf7+ Kh8 69. Qf6+ Kh7 70. Qf7+ Kh8 71. Qf6+ Kh7 72. Qf7+ 1/2-1/2
Dutch GM Benjamin Bok could have forced his opponent to resign:
65. gxf5+!
A) 65...Bxf5 66. Qe8+ Kg5 67. Qe7+ Kf4 68. Re1+-
B) 65... Kxf5 66. Rf8+ Kg6 67. Qg3+ Kh7 68. Rg1 Qb7 69. Qg6#
65... Qxb8 66. Qxe6+ Kh7 67. Qxf5+ g6 68. Qf7+ Kh8 69. Qf6+ Kh7 70. Qf7+ Kh8 71. Qf6+ Kh7 72. Qf7+ 1/2-1/2
17...Be8!
This retreat provides the f7-square for the king. Black is finding unexpected resources on the chessboard – the e7-square for the king and the e8-square for the bishop.
18.Qg3 Kf7 19.Rad1 Bc6 And now the lithe bishop returns to c6. Black is well on the way to having every piece mobilized.
20.Rd2 e5 21.Be3 Bb4.
This retreat provides the f7-square for the king. Black is finding unexpected resources on the chessboard – the e7-square for the king and the e8-square for the bishop.
18.Qg3 Kf7 19.Rad1 Bc6 And now the lithe bishop returns to c6. Black is well on the way to having every piece mobilized.
20.Rd2 e5 21.Be3 Bb4.
31.Bc6!
An aggressive form of defence: Short not only meets the threat of 31...Rfe8, but even prevents Black from doubling rooks on the e-file.
31...Kh7?
A key moment. White's next move carries us firmly into Reuben Fine's 'the king is a strong piece: use it!' endgame territory.
32.Qg4!
Thanks to the king doing a job on d3, rather than hiding away on g1, the white queen doesn't have to worry about defending e3. With the exchange of queens, White's pawn mass on the queenside becomes the most significant factor.
32...Qxg4 33.hxg4+/-
An aggressive form of defence: Short not only meets the threat of 31...Rfe8, but even prevents Black from doubling rooks on the e-file.
31...Kh7?
A key moment. White's next move carries us firmly into Reuben Fine's 'the king is a strong piece: use it!' endgame territory.
32.Qg4!
Thanks to the king doing a job on d3, rather than hiding away on g1, the white queen doesn't have to worry about defending e3. With the exchange of queens, White's pawn mass on the queenside becomes the most significant factor.
32...Qxg4 33.hxg4+/-
Unity Chess Multiple Choice 453
public poll
C: Ka7 – 7
👍👍👍👍👍👍👍 64%
Jonas, Kenneth, @Afshin3333, Jayden, @SteveWongso, @RichardPeng, Jaikrishnan
A: Ne4 – 3
👍👍👍 27%
@MerissaWongso, @Sophia_Peng, Atharva
B: g5 – 1
👍 9%
Sanjana
👥 11 people voted so far.
public poll
C: Ka7 – 7
👍👍👍👍👍👍👍 64%
Jonas, Kenneth, @Afshin3333, Jayden, @SteveWongso, @RichardPeng, Jaikrishnan
A: Ne4 – 3
👍👍👍 27%
@MerissaWongso, @Sophia_Peng, Atharva
B: g5 – 1
👍 9%
Sanjana
👥 11 people voted so far.
Unity Chess Multiple Choice 454
public poll
B: c5 – 5
👍👍👍👍👍👍👍 38%
Mieke, Sanjana, @MerissaWongso, @Sophia_Peng, Jaikrishnan
C: Qg3 – 5
👍👍👍👍👍👍👍 38%
Jonas, @Afshin3333, Jayden, @SteveWongso, @RichardPeng
A: Qe2 – 3
👍👍👍👍 23%
Kenneth, Atharva, Kiran
👥 13 people voted so far.
public poll
B: c5 – 5
👍👍👍👍👍👍👍 38%
Mieke, Sanjana, @MerissaWongso, @Sophia_Peng, Jaikrishnan
C: Qg3 – 5
👍👍👍👍👍👍👍 38%
Jonas, @Afshin3333, Jayden, @SteveWongso, @RichardPeng
A: Qe2 – 3
👍👍👍👍 23%
Kenneth, Atharva, Kiran
👥 13 people voted so far.