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Vadim Malakhatko vs Katerina Nemcova
Reykjavik Open (2008), Reykjavik ISL, rd 1, Mar-03
Semi-Slav Defense: Meran. Lundin Variation (D47)  ·  1-0

8
7
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5
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2
a
1
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h
White to move.
ANALYSIS [x]
1-0

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
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Kibitzer's Corner
Jan-10-17
Premium Chessgames Member
  fredthebear: Simple but nice tactical finish by White, shifting from one threat to another.
Jun-28-23  jrredfield: Another sac, very straightforward today. 39 Rxb7 Qxb7 (if 39 ... Ra1+, White can mate much quicker with 40 Kh2 Qxb7 41 Bxd5 Ra7 42 Qxe6+ and the end will be very near) 40 Qxe6+ Kf8 41 Qf6+ Qf7 42 Qxf7 Kxf7 43 Bxd5+ Kg6 44 Bxa8 and mate soon.
Jun-28-23  Brenin: 39 Rxb7 is tempting, especially in a POTD, but I think I prefer to keep my material with 39 Rb6, threatening 40 Rxe6 and the collapse of Black's position, e.g. 39 ... Bc8 40 Bxd5, or 39 ... Ra6 40 Qb8+, or 39 ... Kf7 40 Rxb7 Qxb7 41 Qg7+.
Jun-28-23  mel gibson: I saw that move straight away and also
the loose Rook on a8 but I wasn't sure
if it was a good move.

Stockfish 15 says White wins _ mate in 30:

39. Rxb7

(39. Rxb7 (Rb1xb7 Qe7xb7 Qe5xe6+ Qb7-f7 Qe6xf7+ Kg8xf7 Bf3xd5+ Kf7-g6 Bd5xa8 Kg6-h5 Kg1-h2 Kh5xh6 Kh2-g3 Kh6-g7 f2-f4 h7-h6 f4xg5 h6xg5 e3-e4 Kg7-f6 Ba8-b7 Kf6-e5 e4xf5 Ke5xf5 Bb7-c8+ Kf5-f6 Kg3-g4 Kf6-g6 Bc8-f5+ Kg6-f6 Bf5-d3 Kf6-e5 Kg4xg5 Ke5-e6 g2-g4 Ke6-e5 Bd3-f5 Ke5-d4 Kg5-f6 Kd4-e3 g4-g5 Ke3-e2 g5-g6 Ke2-f3 g6-g7 Kf3-e3 g7-g8Q Ke3-d4 Qg8-c8 Kd4-e3 Qc8-c3+ Ke3-e2 Bf5-e4 Ke2-f2 Qc3-d2+ Kf2-g3 Kf6-g5 Kg3-h3 Qd2-g2+) +M30/65 653)

Jun-28-23  King.Arthur.Brazil: The solution is simple, but it has some details 9. Rxb7 Qxb7 40. Qxe6+ (Not 40... Kh8 41. Qe5+ Kg8 42. Bxd5+) Kf8 41. Bxd5 Ra1+ 42. Kh2 Qb8+ 43. g3 Qa7 44. Qg8+ Ke7 45. Qxh7+ Kd6 46. Qxa7 Rxa7 47. Bg8 and Black will lose the ♖ by the ♙ on h7.

For 40... Qf7, White must not play 41. Qe5? Rd8 42. Bh5 (Qxh5 43. Qg7#) Qf8 43. Qe6+ Kh8 44. Bf7 (Rd6 45. Qe5+ wins) but 44... Qd6 and Black survives.

The correct answer is 41. Qd6! because avoid 41... Rd8 and 41... Ra5 lose the ♖ due Ra5 42. Qd8+ Qf8 43. Qxa5 Qxh6 44. Bxd5+ Kg7 45. Qc7+ Kf6 46. Qd6+ Kg7 47. Qe7+ Kh8 48. Qf7 kills.

Jun-28-23  King.Arthur.Brazil: On the game line: 42...Kd7 43. Qxh7+ Kc8 44. Qxb7+ Kxb7 45. Bxd5+ Ka7 46. Bxa8 Kxa8 47. h7 the ♙ promotes!
Jun-28-23
Premium Chessgames Member
  perfidious: The key subvariation follows 39.Rxb7 Qxb7 40.Qxe6+ Kf8 41.Qf6+ Kg8: (41....Ke8 42.Qh8+ followed by Qxh7+ and exchanges wins easily) 42.Bxd5+.
Jun-28-23  nalinw: <King.Arthur.Brazil> If 40. .... Qf7

41. Qxf7+ Kxf7 42. Bxd5+ and 43. Bxa1

up a Bishop and some pawns

Jun-28-23  nalinw: I meant 43. Bxa8 of course ....

The engine here is really useless some of the time

Here after 40. .... Qf7 it gives 41 Qd6 as the best move .... but play 41Qxf7 and it ups the eval from +7 to +63!

Jun-28-23  agb2002: White is one pawn down.

e6 is momentarily defenseless. This suggests 39.Rb6:

A) 39... Ra6 40.Qb8+ wins the bishop.

B) 39... Bc8 40.Bxd5

B.1) 40... Ra7 41.Bxe6+ Bxe6 (41... Kf8 42.Qh8#) 42.Rc8+ Qf8 (42... Kf7 43.Qg7#) 43.Rxf8+ wins decisive material.

B.2) 40... Ra1+ 41.Qxa1 exd5 42.Qa8 Qd7 43.Rb8 wins.

B.3) 40... Ra6 41.Rxa6 Bxa6 42.Bxe6+ and mate next.

C) 40... Kf7 41.Qg7+ Ke8 42.Qxe7+ Kxe7 43.Rxb7+ and 44.Rxh7 wins decisive material.

-----

The black queen is overburdened with the defense of b7 and e6. This suggests 39.Rxb7:

A) 39... Qxb7 40.Qxe6+

A.1) 40... Qf7 41.Qxf7+ Kxf7 42.Bxd5+ and 43.Bxa8 wins decisive material.

A.2) 40... Kh8 41.Qe5+ Kg8 42.Bxd5+ wins decisive material.

A.3) 40... Kf8 41.Bxd5

A.3.a) 41... Qb1+ 42.Kh2 Ra7 43.Qf6+ Ke8 44.Bc6+ Rd7 45.Qe6+ Kf8 46.Qxd7 and mate in two.

A.3.b) 41... Ra1+ 42.Kh2 Qc7+ 43.g3 Rc1 (due to Bc6+) 44.Qg8+ Ke7 45.Qxh7+ Kd6 46.Qxf5 looks winning [B+3P vs r].

A.3.c) 41... Qa7 42.Qg8+ Ke7 43.Bxa8 wins decisive material.

A.4) 40... Kf8 41.Qf6+ (easier than 41.Bxd5) 41... Ke8 (41... Kg8 42.Bxd5+ Qxd5 43.Qg7#; 41... Qf7 42.Qxf7+ as in A.1) 42.Qh8+ Kd7 43.Qxh7+ Kc8 (43... Kc6 44.Bxd5+ wins) 44.Qxb7+ Kxb7 45.Bxd5+ wins.

A.5) 40... Ra6 41.Qg8+ Ke7 42.Bxb7 wins.

B) 39... Ra1+ 40.Qxa1 Qxb7 41.Qf6 wins.

-----

39.Rb6 looks a bit simpler.

Jun-28-23
Premium Chessgames Member
  scormus: Seeing it was the POTD, my went first to 39 Rxb7 Qxb7 40 Qxe6. After looking at alternatives I decided that was the most positive and most likely the text. If B interposes the Q and W ends up a clear piece ahead, which turned out to be the <mel> SF line.

I'm not sure if I'd play it OTB. From bitter experience, I'd be conscious of the possibility of overlooking something. I might decide to follow the same wisdom as the <Celtic King> and keep my powder dry

Jun-28-23  AlicesKnight: I saw the gameline break-in and features others have mentioned including the potential promotion of the h-pawn. But I'm very unsure if I would have seen 38.d5 which set it up.
Jun-28-23  Mayankk: My line was 39 Rxb7+ Qxb7 40 Qxe6+ Kf8 41 Bxd5 Qc7 (not forced but Queen needs to stay on the 7th Rank to guard against 42 Qf7#) 42 Qg8+ Ke7 43 Qxh7+ Kd8 44 Qxc7+ Kxc7 45 h7 with ideas of Bg8 and h8=Q.

The line seemed reasonably obvious. Black doesn't have much chance of a perpetual and White gets B + 3P for a Rook which should ensure a draw in the worst case.

Jun-28-23  Brenin: I see from Wikipedia that Vadim Malakhatko died of a heart attack in Kyiv earlier this month. RIP, Vadim, and thank you for some great games.
Jun-28-23
Premium Chessgames Member
  HeMateMe: Seems like a Monday. Tactics 101.
Jun-28-23
Premium Chessgames Member
  Honza Cervenka: 39.Rxb7 Qxb7 40.Qxe6+ Kf8 41.Bxd5 Ra1+ 42.Kh2 Qc7+ 43.g3 Rc1 44.Qg8+ Ke7 45.Qxh7+ Kd6 46.Qxc7+ Rxc7 47.Bg8 and the h-Pawn decides.
Jun-28-23
Premium Chessgames Member
  scormus: <Brenin> Thanks for the sad news. Just 46 years old. Gave a fine demonstration in this game, from early on looked to be in control.
Jun-28-23
Premium Chessgames Member
  chrisowen: Ash its work q pot its din its v face its jug Rxb7 abridge axled its axiom its ha fog pug bah its umbrage bath its fun its Rxb7 ear!
Jun-28-23  Refused: cute little finish

39.Rxb7 Qxb7 (39...Rxa1 40.Qxa1 is kinda pointless) 40.Qxe6+ small split

a) 40...Qf7 41.Qxf7+ Kxf7 42.Bxd5+ and a8 drops

b)40...Kh8 41.Qxf6+ Kg8 42.Bxd5+ Qxd5 43.Qg7#

c)40...Kf8 41.Qxf6+ Ke8 (Qf7 is basically line a)) 42.Qh8+ Kd7 43.Qxh7+ Kc8 44.Qxb7+ Kxb7 45.Bxd5+ Ka7 46.Bxa8 and the h-pawn runs.

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