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Boris Gulko vs Lev Alburt
43rd USSR Championship (1975), Yerevan URS, rd 1, Nov-??
English Opening: Agincourt Defense. Keres Defense (A14)  ·  1-0



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Given 31 times; par: 75 [what's this?]

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sac: 43.Re6+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Sep-01-20  backyard pawn: Force the exchange of pieces with 43. Re6+. Then push the b pawn and get a queen.
Sep-01-20  latebishop: The main idea is clear, as after 43.Re6+ Rxe6 44.Bxe6 Kxe6 45. b6 wins directly, but if Black plays 44...Nd4 a little care is needed: 45.Bd7! to prevent the Knight reaching b6 or c6, 45...Ke7 46.b6 axb6 47.a6 and wins.
Premium Chessgames Member
  al wazir: The a-♙, not the b-♙ get promoted: 44. Bxe6 Kxe6 45. b6 axb6 46. a6.

If 46. axb6, then 46...Kd6 wins

Sep-01-20  Walter Glattke: The device is 47.a6, by 47.axb6 black would catch the pawn. 45.-Nd4 46.Bd7! black must play 46.-Nxb5 47.Bxb5, otherwise quick mate.
Sep-01-20  Walter Glattke: One can play 43.Re8, seems to win, too. Maybe better than the position after 46.-Nxb5. 43.-Ne5 44.Be2 Rd2 45.Kf1 Nf3 46.Bxf3 gxf3 47.Ke1 Rb2 48.Rb8 Ke6 49.b6 axb6 50.a6 so 47.-Ra2 48.b5 axb5 49.axb5 Rb2 50.Rb8 Ke7 51.b7 Kd7 52.Rh8 so 51.-Kd6 52.Rd8+ Kc7 the main variation 53.b8Q+ Rxb8 54.Rxb8 Kxb8 55.Ke2 Kc7 56.Ke3 Kd6 57.Kxf3 Ke5 58.h3 h5 59.h4! wins. I like analysis, I apologize for this long comment.
Sep-01-20  Cheapo by the Dozen: Obvious part: Exchange at e6, then push b6.

Non-obvious part: However White defends, maneuver to queen on the a-file, not the b-. That's the race White can win, against either Black's king or knight.

Sep-01-20  agb2002: White has a bishop and pawn for a knight.

White would like to push the b-pawn. Therefore, 43.Re6+ Rxe6 44.Bxe6:

A) 44... Kxe6 45.b6 axb6 46.a6 (46.axb6 Kd7 - +) 46... Nd4 47.a7 wins.

B) 44... Nd4 45.Bd7 Ke7 (due to 46.b6) 46.b6 axb6 (46... Kxd7 47.bxa7 wins) 47.a6 Kxd7 48.a7 wins.

C) 44... Ne5 45.Bd5 Nd7 46.b6 axb6 47.a6 b5 48.a7 Nb6 49.a8=Q Nxa8 50.Nxa8 b4 51.Bd5 + - [B vs p].

D) 44... Ne1+ 45.Kf1 Nd3 46.b6 axb6 47.axb6 Nc5 48.Bc8 Ke7 49.b7 Nxb7 50.Bxe7 + - [B].

Sep-01-20  Brenin: After the obvious liquidation 43 Re6+ Rxe6 47 Bxe6, Black cannot capture the B, as an a-pawn will queen. Instead he must play 47 ... Nd4 or Ne5, allowing the B to escape. Then Black will have to give up the N to prevent queening, leaving White a B up with an easy win.
Sep-01-20  AlicesKnight: Found the main idea including the need to queen an a-pawn - a nice "point of order" as Gerald Abrahams would have said.
Sep-01-20  Dionysius1: Hi <latebishop>. I think 45 Bc4 Nc6 46 a6 still wins
Sep-01-20  saturn2: Black cannot stop the queenside pawns after
43. Re6+ Rxe6 44. Bxe6 Kxe6 (Nd4 45. b6 Nc6 46. Bd5) 45. b6 axb6 46. a6
Sep-01-20  TheaN: As obvious as <43.Rxe6+ Kxe6 44.Bxe6> is, what else, not accepting the bishop now is indeed tricky and I was a bit sloppy in analyzing only Ne1+. Of course, 44....Kxe6 45.b6 axb6 (else bxa7 or b7) 46.a6 +- is easy for White, and after 44....Ne1+ 45.Kf1 the position doesn't change much because the knight's too far out (ie, now 45....Kxe6 46.b6 +- still.

However, after <44....Nd4>, which I didn't analyze, White will have to revert to the dominating endgame with <45.Bd7 +-> to win. The bishop cuts off the knight completely, and Black will have to play 45....Nxb5 +- already to prevent queening. It's not too tough to spot and not necessary for the effectiveness of 43.Re6+ (which is possible because 44....Kxe6 45.b6 +- wins), so whether it's 'required' to spot this move is debatable.

However, if 45.b6? axb6! and now White is faced with Kxe6 and Nc6 as threats, so that leaves 46.Bxf5 (a6? Nxe6! -+) bxa5 (Kxf5 47.axb6 Nc6 48.f3 =) 47.Bxh7 = and even though Black now has the queenside passer (impossible to think of in the starting position) White can trade g4 easily and give the bishop for the a-pawn, but Black has initiative.

Sep-01-20  lost in space: What <al wazir> said
Sep-01-20  lost in space: I thought that 44. Bxe6 Kxe6 45. a6?? is a side solution, but it isn't:

46. a6 Ne5 47. b6 Nc6 and white is lost

Sep-01-20  nalinw: Why can't the engine find this move? It gives

43. Bb3 with +1.3 .....

Sep-01-20  TheaN: <nalinw: Why can't the engine find this move? It gives

43. Bb3 with +1.3 .....> Ply and analysis limit I reckon. If you play 43.Re6+ it goes to just +3 with the 43....Rxe6 44.Bxe6 Ne5 line, as after 45.Bd5 +- White still has some work to do.

On another note, this game incorrectly gives 43.Re6+ as a rook sac, because Black resigned after replying. Probably more flagged like this, which skews the sac database.

Premium Chessgames Member
  pittpanther: I solved this but thought it was difficult for a Tuesday, thought it was more Wednesday level - especially to check variations where black does not take the bishop. Years ago I lost a hard fought game against a master when I was 1500. I had two rooks for a queen and at a point simplified down thinking I would win the pawn ending but missed an idea like we see here where when b6 is captured white walks by with a6 and is one more file away!
Premium Chessgames Member
  scutigera: Interesting to see these two US chess champs slugging it out as Soviets.
Sep-01-20  Nullifidian: 43. ♖e6+ ♖xe6 44. ♗xe6. If 44... ♔xe6, then 45. ♙b6 ♙axb6 and now 46. ♙a6 is necessary for the win. If white plays ♙axb6?? then the game is lost because the black king will be quick enough to prevent the promotion.

A better response seems to be 44... ♘e5 Δ ♘d7 to watch the b6 square, but after 45. ♗d5 ♘d7, white can play 46. ♙b6 anyway. Play continues with 46... ♙axb6 47. ♙a6! ♙b5 48. ♗c6 ♘b6 (to control the queening square) ♗xb5 and black has nothing to hope for. White will bring the king into the game and play ♙f4 in due course, locking the black pawns on light squares, where they will be a tasty snack for the bishop. Black won't be able to defend against the threats of promotion on both sides of the board.

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