The most important feature of the Chess position is the activity of the pieces.
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[Event "rated untimed match"]
[Site "?"]
[Date "1920.??.??"]
[Round "?"]
[White "Duncan"]
[Black "Siegheim"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "r1bq1rk1/ppp2pp1/2np1n1p/3Np1NQ/7P/1B1P4/PPP2PP1/2KR3R w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Qg6 fxg6 ( { Black can try: } 1... Kh8 2. Nxf7+ Rxf7 { White wins with a
large material advantage. } 3. Qxf7 { White wins with a large material
advantage. } ) 2. Ne7+ Kh8 3. Nxg6# 1-0