hphp task online puzzle

4x5 - 20 pieces4x6 - 24 pieces5x7 - 35 pieces6x8 - 48 pieces7x9 - 63 pieces8x10 - 80 pieces9x11 - 99 pieces9x12 - 108 pieces10x13 - 130 pieces11x14 - 154 pieces12x15 - 180 pieces13x16 - 208 pieces13x17 - 221 pieces14x18 - 252 pieces15x19 - 285 pieces16x20 - 320 pieces17x21 - 357 pieces18x22 - 396 pieces18x23 - 414 pieces19x24 - 456 pieces20x25 - 500 pieces Start a new game Create a multiplayer game table

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