Tactics lurk when a rook and an enemy queen lie on the same file.
Eduard Gufeld White
Janis Klovans Black
Moscow 1956
Ruy Lopez C79
1 e4 e5 2 ♘f3 ♘c6 3 ♗b5 a6 4 ♗a4 ♘f6 5 0-0 d6
Note that 6 d4 b5 7 ♗b3 ♘xd4 8 ♘xd4 exd4 9 ♕xd4? is another version of the Noah’s Ark Trap (9...c5! wins).
Question 255: What happens on 9 c3 dxc3 10 e5 ?
6 c3 ♗d7 7 ♖e1 ♗e7 8 a3 0-0 9 h3 ♕c8
Black prepares d8 for a rook and the opening of the center.
10 d4 exd4!? 11 cxd4 d5
If Black gets his knight to e4 he should be fine, 12 e5 ♘e4. And then 13 ♘c3 ♘xc3 14 bxc3 ♘a5 and ...♘c4.
12 ♘c3!? dxe4 13 d5
This is based on 13...exf3 14 dxc6 as well as a pawn sacrifice, 13...♘b8 14 ♘xe4 ♘xd5! 15 ♗b3!? (not 15 ♕xd5 ♗xa4). Black unwisely rejects that.
13...♖d8?
He saw that 14 ♘xe4 ♗e6! favors him because of the file pin (15 dxe6? ♖xd1).
14 dxc6! ♗xh3!? 15 cxb7 ♕g4
Black threatens mate on g2, as well as ...exf3.
16 ♘h4!
But now 16...♖xd1 17 bxa8(♕)+ or 16...♖ab8 17 ♕xg4 are quite lost.
16...♕xh4 17 bxa8(♕) ♖xa8 18 g3! resigns.
Wolfgang Unzicker White
Bogdan Sliwa Black
Gothenburg 1955
1 e4 e5 2 ♘f3 ♘c6 3 ♗b5 a6 4 ♗a4 d6 5 c3 ♗d7 6 d4 ♘f6 7 0-0 ♗e7 8 ♘bd2 0-0 9 ♖e1 exd4 10 cxd4 ♘b4 11 ♗xd7 ♕xd7 12 ♘f1 d5 13 ♘e5 ♕e8 14 a3 ♘c6 15 ♘xc6 ♕xc6 16 e5 ♘e8? (16...♘e4!) 17 ♘e3 f5? 18 ♕f3 and wins after ♘xd5 or ♘xf5.