Residual water online puzzle

2x3 - 6 pieces3x4 - 12 pieces4x5 - 20 pieces5x6 - 30 pieces6x8 - 48 pieces8x10 - 80 pieces9x11 - 99 pieces9x12 - 108 pieces10x13 - 130 pieces11x14 - 154 pieces13x16 - 208 pieces20x25 - 500 pieces Start a new game

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