It is nothing said about the following situation:

6
a2 a3 f1

I.e., whether a white pawn can jump over a black pawn from 2nd row on the 4th. Nothing is said in the problem statement, but a program which would output "WHITE WINS" for this test case gets WA on test 3. Please complete the problem description with this remark (or excuse me, if I didn't notice how to conclude an unambiguous rule for this case)

And I also sent a test to yakovlev@metronome.ru, which possibly should be added to the test set, because my 2 programs, outputing different answers for this test case, both get AC.