• Chromawell

  

  Survive as long as you can — keep any single color stack from reaching the top, and don't run out of moves.

• ABdoku

  

  Place one A and one B in each color. Follow the row, column, diagonal, and touch rules to solve the grid.

• ChessRelay

  

  Pass the baton from piece to piece. Capture with chess moves until the board is clear — or close enough.

• Midcoil

  

  A rope pulled taut. Find the exact middle, then snap it. Miss, and the two ends tell you how far off you were.

• Hexact

  

  Walk the whole board, number by number, until only one hex is left.