Shakmaty Bereolos - The Official Chess Site of Peter Bereolos

White: FM Peter Bereolos
Black: GM Julio Sadorra
Kings Island Open, 2016
Round 2, Board 2
40/100, SD/30

1.Nf3 d5 2.d4 Nf6 3.c4 e6 4.g3 Be7 5.Bg2 0-0 6.0-0 Nbd7 7.Qc2 c6 8.Nbd2 a5

When I asked him about the opening afterwards he said it was something he had come up with because it was not in Avrukh's book. 9.Rd1 Placing the rook on the same file as the queen is typical in the closed Catalan to discourage the ...c5 break. But here, since Black has not played ...b6, there are no issues with a potential ...Ba6 in the near term, so it is probably too soon to commit the rook. As we will see as the game continues, there are a couple of times where White would rather not have the rook on d1. So I think White should just get on with the central break with 9.e4 9...a4 10.e4 h6 I don't really like this move, creating a target on h6. Black should consider 10...b6 and if the game continues the same way he has an opportunity to trade his bad bishop 11.e5 Ne8 12.cxd5 cxd5 13.Bf1 Ba6 11.e5 Ne8 12.cxd5 cxd5 13.Bf1 Since Bd3 will not come with tempo, perhaps White should just get on with the kingside attack instead of repositioning the bishop. 13.h4 Nb8 14.Nf1 Nc6 15.Bf4 Bd7 16.N1h2 Rc8 17.Qe2 13...Nb8 14.Nb1 Nc6 15.a3 Bd7 16.Be3 I looked at 16.Nc3 Na5 17.Nxa4 Nb3 and Black wins the exchange because of the rook at d1. The engine says White has compensation, but sacrficing an exchange was not really a consideration, as White already is planning to eventually sacrifice a piece on h6. 16.Bf4 might also merit consideration so when the Black knight arrives on c4 it is not threatening to exchange this attacking piece. 16...Na5 17.Nc3 Rc8 Another consequence of Rd1 is that it takes away the best square of the a1 rook. If White's rook was on e1 instead, White could play Rad1 here and meet Nc4 with Bc1 and White is fully developed and ready to carry out the kingside attack. 18.Bd3 18.h4 Since White just trades this bishop on the next move, it would have been better to play 18...Nc4 19.Bxc4 Ideally, White would like to preserve both bishops, but 19.Bc1 locks out the a1 rook and; 19.Bf4 can perhaps be met by 19...g5 19...Rxc4 20.Qe2 Rc8 21.h4 Nc7 22.Nh2 Na8 23.Ng4 Nb6 24.Nxh6+

The consequence of Black's tenth move. 24...gxh6 25.Qg4+ Kh7 26.Qh5 Be8 27.Qxh6+ Kg8 28.Ne2 f6 29.Nf4 Rf7 30.Nxe6 Qd7 31.Ng5 Rc6 31...fxg5 32.e6 Qd6 (32...Qc6 33.exf7+ Bxf7 34.Qxc6 Rxc6 35.Bxg5 Bxg5 36.hxg5 Nc4) 33.exf7+ Bxf7 34.Qxd6 Bxd6 35.Bxg5 is a complex material imbalance. This also occurs in the game, but with queens off White has much fewer worries with the light squares around his king.

32.Nxf7?! This is too ambitious, it was better to settle for perpetual check with 32.e6 Rxe6 33.Nxe6 Qxe6 34.Qg6+ Kh8 35.Qh5+ 32...Bxf7 33.Qf4 Nc4

34.Bc1?! Seeing no other good way to cover the b-pawn, I reluctantly made his retreat. However, the White position is too difficult to manage after this. Instead, White has to give up the queenside and hope for play against the exposed Black king with 34.Rac1 Nxb2 35.Rxc6 Qxc6 36.Qg4+ Kh7 37.exf6 Bxf6 38.Rb1 when the engines still give a small plus to White, but certainly all 3 results are still possible. 34...Qh3 35.Rd3? White had to try 35.exf6 Bxf6 36.Re1 but the Black position is much easier to play after 36...Bg6 35...Bg6 36.Rc3 fxe5 37.dxe5 Be4 38.f3 Bc5+ 39.Be3 Nxe3 40.Qg5+ Rg6 0-1