Sorteo de Puzles

Genera ejemplos aleatorios similares con solucion posible.

Piezas

JSON del problema

[
  { "name": "P1", "rows": ["00000y00","00000b00","00000y00","00000b00","00000000","00000000"] },
  { "name": "P2", "rows": ["000000","000000","00y000","00by00","00yb00","0yby00"] },
  { "name": "P3", "rows": ["000yby0000","000byb0000","000yby0000","000byb0000","000yby0000","000byb0000","000yby0000","000byb0000","0000000000","0000000000"] },
  { "name": "P4", "rows": ["000000","000000","0000b0","0000y0","0000b0","0000y0","000yb0","000000","000000"] },
  { "name": "P5", "rows": ["0000000","000yb00","000by00","000yb00","0000y00","0000b00"] },
  { "name": "P6", "rows": ["00000000","00000b00","00000y00","0b0b0b00","0y0yby00","0bybyb00","00000000","00000000"] }
]