@Test
public void testMercy(){

	assertNull(counter.mercyWinner());
	String[] diagram = {
			"#####",
			"#####",
			"#####",
			"#####",
			"#.#..",
	};
	board.setUpProblem(diagram, BLACK);
	assertNull(counter.mercyWinner());
	board.play(board.getCoordinateSystem().at("e1"));
	assertEquals(BLACK, counter.mercyWinner());
	diagram = new String[] {
			"###..",
			".....",
			".....",
			"OOOOO",
			"OOOOO",
	};
	board.setUpProblem(diagram, WHITE);
	assertNull(counter.mercyWinner());
	board.play(board.getCoordinateSystem().at("a3"));
	assertEquals(WHITE, counter.mercyWinner());	
}