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The goal of all chess puzzles is to checkmate your virtual opponent no matter what moves they make (i.e. a forced mate), in the requested number of moves. Some chess puzzles are created from actual chess games played online, and some are purely composed chess problems, sometimes even with positions that cannot be reached in a real game of chess.
All chess puzzles are automatically verified, so all solutions are guaranteed to be correct and complete.
Chess board should be interactive similar to play against computer. I mean, once I do a mover, the computer will play his move and then I continue (applicable for puzzles more than 1 move required). If I play wrong move, the computer would tell me immediately it is wrong and take my move back.
Please look into the attachment for the full details.