separate the 5 triplets and detect the 8 matching odd / even patterns.

I don't know if I'm correctly interpreting your request, but you can identify whether each number is odd/even using the following in Q5:

=MOD(A5,2)+1

Copy it right through AI5, adjusting for the triplets, then fill down.

You can then use COUNTIFS to count the number of times each triplet combination has been drawn using the following in AM5:

=COUNTIFS($Q$5:$Q$1836,LEFT(AK5,1),$R$5:$R$1836,MID(AK5,2,1),$S$5:$S$1836,RIGHT(AK5,1))+COUNTIFS($U$5:$U$1836,LEFT(AK5,1),$V$5:$V$1836,MID(AK5,2,1),$W$5:$W$1836,RIGHT(AK5,1))+COUNTIFS($Y$5:$Y$1836,LEFT(AK5,1),$Z$5:$Z$1836,MID(AK5,2,1),$AA$5:$AA$1836,RIGHT(AK5,1))+COUNTIFS($AC$5:$AC$1836,LEFT(AK5,1),$AD$5:$AD$1836,MID(AK5,2,1),$AE$5:$AE$1836,RIGHT(AK5,1))+COUNTIFS($AG$5:$AG$1836,LEFT(AK5,1),$AH$5:$AH$1836,MID(AK5,2,1),$AI$5:$AI$1836,RIGHT(AK5,1))

Fill down for the other trios. Take a look at the attachment to see if I'm understanding your objective correctly:

My pleasure, good luck!

I'm not sure I understand. Could you post a new sample workbook with an example of how it should look?

Thank you for the clarification! Same idea as before, but use the following to return your 03/04 score:

=IF(RIGHT(A6,1)+0<5,3,4)