Opposition:
-odd number of squares between Kings and it is not your turn
-about moving to key squares eventually to help advance promoting pawn, so do not neglect the pawn(s). Pawn awareness is paramount, pay attention to i) attack/defend the pawn, and also ii) to be aware of pawn getting in the way of opposition (occupying the square of their diagonal attack squares); consider taking distant opposition if pawn would be getting in the way of maintaining direct opposition
-convert distant opposition to direct opposition
-when simplify, you want to end up in position of opposition. Eg below:

Opposition will not work if:
-attacking King is 2 ranks ahead of his pawn ie pawn has a square in front of King
-side with pawn can get King on the 3 squares on 6th rank directly in front of pawn
-defender gets to promoting square for attacking rook pawn

When attacking:
-King wants to be in front of pawn
-be careful of own pawn blocking King's path for opposition
-no need opposition on 6th rank because you already break into on 6th, then take opposition and take 7th rank square to promote your pawn
-7th rank to promote
-you do not want to check the defender when promoting pawn advances to 7th rank
-for rook pawn you want to take horizontal opposition on b/g file to guard promoting pawn

When defending:
-keep King on the same file as promoting pawn, then aim for opposition
-you always want to be in check when promoting pawn advances to 7th rank
-use opponent's pawn to block their King for opposition

Cobra Kann Chess Squad

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