Ever wanted to be an agent of the U.S. Treasury? Well, here's your chance.

The Treasury would like to replace the old Eisenhower silver dollars in circulation with the new Sacagawea gold dollars.

Your goal is to turn all the coins on the board into gold dollars by a sequence of mouse clicks.

When you click on a silver dollar, it changes to a gold one; when you click on a gold dollar, it changes to a silver one. In addition, each click changes the make of the dollars of the entire row and column that contain the dollar you've clicked.

 

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