Puzzle Sources - Choose A Puzzle From These Links!

We'll predominately use these very difficult puzzles for now so that we can advertise that fact to the members. Please add your own sources of highly difficult puzzles if you know of any.

• https://www.chess.com/forum/view/more-puzzles/hard-puzzles4
• https://www.chess.com/article/view/the-most-difficult-chess-puzzle

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