ChessEndings
Win the endgames you keep letting slip.
24 theoretical positions
Every verdict verified by tablebase
I
Learn the idea
A two-minute lesson on the one concept that decides the position — the opposition, the bridge, the third rank.
II
Beat perfect defense
Play it out. The opponent pushes its pawn to the last rank, sets traps, and never, ever gifts you the win.
III
Keep it forever
Spaced reviews bring the position back — mirrored and color-swapped, so you retain the idea, not the squares.