class GameRulesStrategy implements Strategy {

	static getTests() {
		[
			new Test(
				'900637100030001000107520300004810500019000820006059400002048705000200080001793006'
			)
		]
	}

	boolean play(Board board) {
		def madePlay = false
		board.cells.findAll {
			it.isKnown()
		}.each { c ->
			c.houses.flatten().findAll {
				it != c && ! it.isKnown()
			}.each {
				madePlay = it.removeMark(c.value, this) || madePlay
			}
		}
		madePlay
	}

}