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Normal Topic C57: New Variations: Wilkes-Barre, 2N Defense (Read 1360 times)
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C57: New Variations: Wilkes-Barre, 2N Defense
06/18/13 at 14:40:57
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Here is a test of the Wilkes Barre in the Two Knights' Defense (180'40 90'20 30 Game). While the general belief is that the Wilkes-Barre is unsound, practical results suggest otherwise. When a future World Champion, Anand, lost, and another, Karpov, only drew, it is a testimony of its surprise value. If Houdini 3 can't find anything good for Black, however, it strongly suggests the opening is unsound):

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.Bxf7ch: Houdini makes an interesting choice, Kf8?! 6.Bb3 (Bc4 Na5 7.Be2 [d3 Nxc4 8.dxc4 d6 9.Nc3 Bg4 10.Qd3 +/-; h6 8.Nf3 Nxe4 9.O-O +/-]) Qe8 (Estrin, "Wilkes-Barre Variation" mentions the game Schmidt-Ziebold, 1968 which saw 6.Bb3 d5 7.exd5 Nd4 8.Ne6+ Bxe6 9.dxe6 Nxb3 10.axb3 Bxf2+ 11.Kxf2 Ne4+ 12.Ke1 Qh4+ 13.g3 Nxg3 14.Qf3 Nf5+ 15.Kd1 g6 16.Ra4! “White obtains a decisive advantage”) 7.d3 d6 8.Nf3 Qg6 9.O-O Bh3 (Simplifying into a lousy position) 10.Nh4 Qg4 11.Qxg4 Bxg4 12.h3 Bd7 12.Nf3 +/-

5.Bxf7ch Ke7 6.Bc4! (Estrin gives the correspondence game Praqua-Krause [1974-76] 6...d6 7.Nc3 Qf8 8.O-O h6 9.Nf3 g5 “In this complicated position, Black has the initiative for the sacrificed pawn”. This seems dubious after just 10.d3 +-

We now test Williams' idea "The Real American Wilkes-Barre Variation Two Knights Defense": 5...Ke7 6.Bc4 Qe8 7.Nc3 Nd4 8.Na4! (Williams did not consider this move) Qh5 9.d3 Qxd1+ 10.Kxd1 Bd6 (Bb6 11.c3 +/-) 11.c3 Ne6 (Nc6 12.Nf7 +/- or 12.Nxe6 dxe6 +/-

There were no master level tests of 6.Bc4 in my 2013 “Big data base” from ChessBase) 6...d6 7.Nc3 Na5 8.Be2 h6 9.Nf3 Re8 (Houdini sees that Rf8 gives Black nothing and hopes to get play on the e-file) 10.O-O (The Knight on a5 has nothing better than to return to c6) Kf8 11.d3 Nc6 12.Na4 Bb6 13.c4 This is at least +/-.

The second game was: 6.Bc4 Qe8 7.Nc3 d6 8.Nd5ch Nxd5 9.exd5 Qg5 10.dxc6 Qxg5 11.O-O Qh4 12.Bd5 Bg4 13.Qe1 bxc6 14.Bxc6 Rab8 15.c3 Be6 16.b4 Bb6 17.d3 Rhf8 18.Be3 a5 19.b5 Kf7 20.Qe2 Kg8 21.d4 Bf7 22.g3 Qf6 23.Rfd1 Be8 24.Qc4+ Kh8 25.a4  +1.20 at Depth = 27

The third game was: 6.Bc4 Rf8 7.Nc3 (Not fearing Bxf2+ 8.Kxf2 Nxe4+ 9.Kg1 Nxg5 10.d4 +-) Na5 8.Bd3! (I found this with Houdini before playing this game. It is devastating. Again the shot Bxf2+ doesn't work because of 9.Kxf2 Nxe4+ 10.Ke1 Nxg5 11.Qh5! +-) d6 9.O-O h6 10.Nf3 Be6 11.Na4! (A major reason for Bd3 is that e4 isn't hanging) Bb6 12.b3 Kf7 13.Nxb6 axb6 14.Bb2 (White has an extra pawn, the Bishop pair, the initiative and the better pawn structure) Kg8 (Bg4 15.Be2 Nxe4? 16.Nxe5+ +-)15.Nh4 (Bg4? f3/Qe1 +-) +1.25 at Depth =25

« Last Edit: 06/18/13 at 17:06:48 by Smyslov_Fan »  
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