The most important feature of the Chess position is the activity of the pieces.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Thomas"] [Black "Keres"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "2krr3/1bp2pp1/p2P3p/1p6/6Nq/1P1P3n/1PQ2PPP/R1B2R1K b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Bxg2+ 2. Kxg2 Qxg4+ 3. Kh1 Qf3# 0-1