(1) Mangion,Ian (1966) - Chieu,Ken (2190) [B28]
21st Kenilworth Championship Kenilworth, NJ (4), 03.02.2011
[Moldovan & Houdini 1.5a]

B28 Sicilian Defense O'Kelly Variation

1.e4 c5 2.Nf3 a6 3.g3
Ken gave this a "!" but I don't think the praise is justified. [3.c3 is best.]

3...b5!?
[>=3...Nc6 as in Selling - Moldovan : KST 2006.]

4.Bg2 Bb7 5.d3 g6
[>=5...e6 /\6.0-0 d6= ]

6.0-0 Bg7 7.Re1 e6N
[Predecessor (2): 7...d6 8.c4 Nf6 9.cxb5 axb5 10.Qb3 Qb6 11.Na3 Nfd7 12.Bd2 b4 13.Nc4 Qc7 14.a3 bxa3 15.e5 0-0 16.exd6 exd6 17.Rxa3 Nc6 18.Nxd6 Qxd6 19.Qxb7 Rab8 20.Bf4 Nce5 21.Qa6 Rb6 22.Qa5 Rxb2 23.Nxe5 Nxe5 24.Bxe5 Bxe5 25.Ra2 Rfb8 26.Re2 Rb1+ 27.Re1 Rxe1+ 28.Qxe1 Qxd3 29.Ra8 Rxa8 30.Bxa8 Qd6 31.Qe4 Bd4 32.Kg2 Kg7 33.Bd5 Bf6 34.Bb3 Bd4 35.g4 Qf6 36.f4 h6 37.Kg3 Barrionuevo,A (2149)-Aranha Filho,A (2275)/Sao Paulo 2004/CBM 098 ext/0-1 (81)]

8.c3 Ne7
Black's setup is okay but I'd rather have ...Nbc6, ...d6 and ...0-0 in, instead of his ...a6, ...b5 & ... Bb7.

9.d4
[9.a4 would have kept an edge.]

9...cxd4 10.cxd4 d6 11.Bg5
Diagram



11...f6?
[11...h6 12.Bxe7 (12.Bd2 0-0= ; 12.Bf4 g5= ) 12...Qxe7= was right.]

12.Bf4 Nbc6?
[12...0-0+/= ]

13.Qb3?
This ends-up costing White several tempi and his advantage. [13.d5 would have given him a huge plus.]

13...e5 14.Be3 Na5 15.Qc2 Rc8 16.Qd3 0-0?
[16...Nc4 17.Nbd2 Nxb2 18.Qb1 Na4 ]

17.d5?
[17.dxe5 fxe5 (17...dxe5 loses an Exchange.) 18.Ng5+/= ]

17...h6?
[17...Nc4=/+ ]

18.Nfd2 f5 19.f3?!
[>=19.Na3+/= ]

19...f4?!
[>=19...Qc7= ]

20.Bf2 Qd7 21.Bb6?
[21.Na3+/- ]

21...Nc4 22.Nxc4 bxc4 23.Qa3
Diagram



23...fxg3?
[23...Bxd5! 24.exd5 e4 ]

24.hxg3 g5
[>=24...h5 ]

25.Nc3?
[25.Nd2+/- ]

25...Ng6 26.Qa4 Qf7 27.Rf1 Ra8?
[27...h5+/= ]

28.Bh3?
[28.Qxc4+/- ]

28...Bc8 29.Bg2 Qb7 30.Qa5 Bd7 31.Rab1 h5 32.Bc7 Rf6 33.Bd8 h4 34.Bxf6 Bxf6 35.Ne2?
[35.gxh4=/+ ]

35...Qa7+ 36.Kh2 hxg3+ 37.Kxg3 Nf4 38.Qd2 Nh5+ 39.Kh2 Kg7 40.Bh3??
[40.Rh1-/+ ]

40...Rh8-+ 41.Bxd7 Nf4+ 42.Kg3 Qxd7 43.Rh1 Rh3+ 44.Rxh3 Qxh3+ 45.Kf2 Nd3+ 46.Kg1 Bd8 47.Qe3 g4 48.Qa7+ Kg6 49.Qd7 Bb6+ 0-1