It is a non-past mixed conditional. What words do you not understand the meanings of? I see no idioms.
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soheil1I could get an advantage in space if my opponent's not careful.Well, it appears to be a mixed conditional, but nevertheless I don't think the author really intended to write
fivejedjonMy real problem is that I have no idea what an 'advantage in space' is.It could be referring to a game of chess, where advantage is traditionally divided into space advantage, time advantage and material advantage.