What is an "artificial" move? Sometimes I see a move or serial of moves described as "artificial"  What does this mean?  Here is one example, comments by Kasparov on move 10. ..cxd4.  Taken from "Garry Kasparov on Garry Kasparov, Part1"


  Later Black sometimes also tried the rather artificial 10...Bg4 11.d5 Rd8 12.Qb2 Bxf3 13.gxf3 Ne5 { (Yusupov-Anand, 6th match game, Wijk aan Zee 1994; I.Sokolov-Topalov, Sarajevo 2001)


[Event "Moscow-4teams"]
[Site "Moscow URS"]
[Date "1981.02.??"]
[Round "1"]
[White "Garry Kasparov"]
[Black "Oleg Romanishin"]
[Result "1-0"]
[ECO "D85"]
[EventDate "????.??.??"]
[FEN ""]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5   8.Be3 Qa5 9.Qd2 Nc6 10.Rc1 cxd4 ( 10...Bg4 11.d5 Rd8 12.Qb2 Bxf3 13.gxf3 Ne5 ) 11.cxd4 Qxd2+ 12.Kxd2 O-O 13.d5 Rd8 14.Ke1 Na5 15.Bg5 Bf6 16.Bd2 b6 17.Rc7 Bg4 18.Ba6 e6 19.Ng5 Be5 20.Rxf7 exd5 21.f4 Bg7 22.f5 dxe4 23.Bxa5 bxa5 24.Bc4 Bc3+ 25.Kf2 e3+ 26.Kg3 Be5+ 27.Kxg4 Rd4+ 28.Kh3 Rxc4 29.f6 Bxf6 30.Rxf6 Re8 31.Re1 e2 32.Kg3 Ra4 33.Kf2 Rxa2 34.Ne6 a4 35.Rb1 a3 36.Rb7 e1=Q+ 37.Kxe1 Rxg2 38.Rg7+ Kh8 39.Rgf7 h5 40.Kf1 Rxh2 41.Rxg6 Rxe6 42.Rxe6 Kg8 43.Rxa7 1-0
An artificial move is one that does not fit in with what would be typical of the plan. It means "unnatural" given the position.

In the game above, Bg4 is unusual, and only played 5.5% of the time in that position. Typically, 10...cxd4 is played there in an overwhelming majority of games, and the Bc8 often ends up on the d7 square as more suitable.