[Event "Swedish league"]  [Date "2015.10.18"]  [Round "1"]  [White "Jostein Langstrand"]  [Black "Chris Lister"]  [Result "1-0"]  [WhiteElo "1399"]  [BlackElo "1141"]  [Eventdate "2015.10.18"]   1.d4 d5 2.c4 Nf6 { Unusual, but perhaps playable. } 3.cxd5 Nxd5 4.e4 Nb6? ( 4...Nf6 ) 5.Nc3 e6 6.Nf3 Bb4 7.Qc2 Nc6 8.Be3 Bd7 9.Be2 f6? { Has nothing to do with the current position, apart from weakening the king. } 10.O-O g5? { Further weakening of the king's position. Black needs to castle long to achieve at least some safety. } 11.d5 Bxc3? { Fails tactically. } 12.Bxb6 ( 12.Qxc3 Na4 { Gives black time to get out of trouble. } ) ( 12.dxc6 Bxb2 13.cxd7+ Qxd7 14.Qxb2 ) 12...cxb6 13.dxc6 Bxc6 14.Qxc3 Bxe4 15.Rad1 Qe7 16.Bb5+ Kf7 ( 16...Bc6 17.Bxc6+ bxc6 18.Qxc6+ Kf7 19.Rd7 ) ( 16...Kf8 17.Rd7 Qe8 18.Qxf6+ Kg8 19.Qg7# ) 17.Rd7 Qxd7 18.Bxd7 Bxf3 19.Qxf3 Rad8 20.Qxb7 h5 21.Re1 e5 22.Bf5+ { It's a forced mate no matter what black does. } 22...Ke8 ( 22...Kf8 23.Be6 Ke8 24.Qf7# ) ( 22...Kg8 23.Be6+ Kf8 24.Qf7# ) 23.Bg6+ Kf8 24.Qf7#  1-0