# Why did Black play Ra8 in this situation?

I am reading `Kasparov Teaches Chess`, and I had a problem about this situation below:

``````[FEN "R2K1B1R/PPP5/5P1P/3PP3/3N1pB1/3p1np1/pppb1qbQ/r2k1r2 b - - 0 1"]
``````

Black plays Ra8? next, why? I think it's better not to leave the queen unprotected.

Sorry I may not have made myself clear. Kasparov gives this variation to demonstrate a certain response is a bad move. I know Ra8 is bad. But if there aren't good choices, you can't say this variation is actually bad, isn't it?

This is the original board situation:

``````[FEN "rn1qk2r/pb2bppp/1p2p3/1Bp5/3PP3/P1P2N2/2Q2PPP/R1B1K2R b KQkq - 0 1"]

1... Nc6 2.Ne5 Rc8 3.Qa4 Qc7 4.Qxa7 Ra8? 5.Bxc6+{White Wins}
``````

And by giving such a variation Kasparov made a conclusion that Nc6 is a bad move. What if Black don't play Ra8? He can still possibly make equal trades, and thus Nc6 isn't really bad?

The point is, why is Nc6 a bad move?

• Are you sure Kasparov is not demonstrating why Ra8 is a bad move? Black's in bad shape here. Instead of Ra8, castling will help for multiple reasons including removing the pin on c6 and allowing the rooks to defend each other. Apr 24, 2014 at 11:57
• @aschultz, Thank you for your edition, but I found a small fault: In the bold string up, "if there are good choices, you can't say this variation is actually bad."
– Rui
May 17, 2017 at 15:24
• @Rui glad I could help and sorry for that oversight! I think my brain must've registered that the sentence was a double negative, which it wasn't. May 17, 2017 at 15:59
• @aschultz, yeah sometime I make mistake in code and can't really realize the bug, it's hard to avoid.
– Rui
May 18, 2017 at 15:04

Why Black play Ra8 in this situation?

He wanted to trap the White queen.

I think it's better not to leave the queen unprotected.

You are correct, Black made a blunder, and now loses the game:

``````[StartFlipped "0"]
[fen "2r1k2r/Qbq1bppp/1pn1p3/1Bp1N3/3PP3/P1P5/5PPP/R1B1K2R b - - 0 1"]

1...Ra8 2.Bxc6++- Qxc6 ( 2...Bxc6 3.Qxc7+-) 3.Nxc6! Rxa7 ( 3...Bxc6 4.Qxb6+- ) 4.Nxa7+-
``````

## EDITED IN RESPONSE TO THE OP EDIT:

The point is why is Nc6 a bad move?

`Nc6` is a bad move because it allows a decisive pin along the `a4-e8` diagonal. The fact is that `Bb7` is badly posted to defend the knight on `c6`. If he were at `d7` then `Nc6` would not be pined and Black would be fine.

After `Nc6` White is able to exploit the bad positioning of the `Bb7` to net himself a pawn on `a7`, and still keep the pressure on `Nc6`. After White captures on `a7` we have the second pin on `Qc7` which paralyses Black. Now he must castle, but then White can win a piece:

``````[StartFlipped "0"]
[fen "2r1k2r/Qbq1bppp/1pn1p3/1Bp1N3/3PP3/P1P5/5PPP/R1B1K2R b - - 0 1"]

1...O-O 2.Bxc6 Bxc6 3.Nxc6! Qxc6 4.Qxe7 \$18 Qxe4+ ( 4...cxd4 5.O-O ) 5.Be3 Qxg2 ( 5...cxd4 6.cxd4 Qxg2 ( 6...Qd3 7.Rd1 \$18 ) 7.Kd2 \$18 ) 6.O-O-O \$18
``````

I have checked the lines with the engine. If you have any doubts you can run these positions through the engine yourself. The point is that center is fixed, and White can defend himself by exchanging rooks on the `c-file`. Furthermore, bishop defends well too, and queen can come fast to defense. Black may be able to make a pressure but it will not be a permanent one. White will untangle eventually and convert his extra piece.

If you still have doubts you can post the position as a new question and we can see if other members can spot something that I did not.

## END OF EDIT

Hopefully this helped.

Best regards.

• Thank you for your reply. I do have further question, I edit my post and provide the context of the game. Seems I had asked the wrong question. The question is why Nc6 a bad move?
– Rui
Apr 25, 2014 at 21:42