The 30 lines of the affine plane certainly can be broken to 6 rounds or parallel lines. ( 

ABCDE FGHIJ KLMNO PQRST UVWXY 

AFKPU AGMSY AHOQX AILTW AJNRV 

BFOSW BGLQV BHNTU BIKRY BJMPX 

CFNQY CGKTX CHMRW CIOPV CJLSU 

DFMTV DGORU DHLPY DINSX DJKQW 

EFLRX EGNPW EHKSV EIMQU EJOTY

[download]
)

Update: yeah, the example is wrong, but the statement is still true. Uh. 

ABCDE FGHIJ KLMNO PQRST UVWXY 

AFKPU BGLQV CHMRW DINSX EJOTY 

AGMSY BHNTU CIOPV DJKQW EFLRX 

AHOQX BIKRY CJLSU DFMTV EGNPW 

AILTW BJMPX CFNQY DGORU EHKSV 

AJNRV BFOSW CGKTX DHLPY EIMQU

[download]

In reply to Re^3: Unique Combos with Math::Combinatorics (fair 5) by ambrus
in thread Unique Combos with Math::Combinatorics by ketema

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