var correctchoices=new Array()
correctchoices[1]='c1c5'
correctchoices[2]='d1d5'
correctchoices[3]='d4b4'
correctchoices[4]='g1g7'
correctchoices[5]='f1a1'
correctchoices[6]='c7b7'
correctchoices[7]='a7a6'
correctchoices[8]='d1d4'
correctchoices[9]='b6b5'
correctchoices[10]='b7b4'
var correctanswer=new Array()
correctanswer[1]='Rc1xc5'
correctanswer[2]='Rd1xd5'
correctanswer[3]='Rd4xb4'
correctanswer[4]='Rg1xg7+'
correctanswer[5]='Rf1xa1'
correctanswer[6]='Rc7xb7'
correctanswer[7]='Ra7xa6'
correctanswer[8]='Rd1xd4'
correctanswer[9]='Rb6xb5'
correctanswer[10]='Rb7xb4'