when foretelling 姻緣 :

there are 八卦無官鬼爻 , 十六卦無妻財爻 , 八卦六沖 (the probabilities of 六沖 doubled to 16 when there are 變卦 ).

for the rest, 世應 cannot hold both 官鬼 & 妻財 because order of 六親 is fixed in each 卦. even if they hold 官鬼, 妻財, it may not be held by male & female in the correct order.

coupled with the fact of 五行相剋, 地支相衝, 空亡, 月日剋, 凶卦辭 etc. mind you, even for 吉卦, many 爻辭 are still 凶.

so, it seemed that over 90% one would get a 凶卦 & should leave his or her lover !!!