The sum of Yuri's dice gave, 2 + 4 + 5 = <<2+4+5=11>>11 squares.
For Yuko to get the same sum in the dice, 1 + 5 + X = 11 squares.
Solving the equation, X = 11 - 6, X = <<11-6=5>>5 squares.
To stand in front of his brother, Yuko needs to be at least 1 place in front, so his last die will move him, 5 + 1 = <<5+1=6>>6 squares.
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