XGID=-a----E-CB--eCa--b-db---B-:0:0:1:66:7:5:0:11:10
Match Play. Red leads 7-5 to 11. How should Red play 66?
This is not too difficult. After this roll Red will lead in the race and there is no need to jeopardise that lead.
Sim ply 24/18(2), 9/3(2) is best. 24/18(2), 13/7(2), creating a block, is not an error but there is no need to leave White an ace shot.