2015 Level 6
MY criteria for level 6 puzzles is that they require chains or coloring, in addition to the level 5 skills of hidden pairs and of double-line eliminations.
Level 4 requires noting consequences of having identical doubles in a row, group or column and of single-line eliminations.
Level 4 requires noting consequences of having identical doubles in a row, group or column and of single-line eliminations.
DLE - Double-line elimination
SLE - Single-line elimination
Dbl - double (only 2 options)
Pr - hidden pair
Col - coloring
Ch - Chain
Gp - Group
Cn - Column
PB Post 2015 03 21 Lvl 6
With 32 remaining, coloring of 9s reveals that G2 is not 9 and also B1 is not 9. B1 = 1
With 31 remaining, chain beginning with 9 in C7. Then A9, F9 implies that neither D7 nor E7 can be 1. E7 = 6
PB Post 2015 03 14 Lvl 6
With 31 remaining, color 6 beginning with B6 to prove that B9 cannot contain 6; B9=1
PB Post 2015 03 08 Lvl 5 6
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With 29 remaining, MULTI-color 9 beginning at B3 and C5 to prove that B3 =9
PB Post 2015 02 28 Lvl 6
With 42 remaining, notice 5/7 hidden pair in group 2
With 27 remaining, rows 7 & 8 allow doub le-line elimination of 8
With 25 remaining, color 8 proves C5 cannot contain 8, and later F6 cannot contain 8.
With 16 remaining, color 8 proves G5 = 8
PB Post 2015 02 21 Lvl 6
With 36 remaining, in group 1 notice 3/6 hidden pair and in row 4 notice
7/9 hidden pair.
Also, color 8 to prove that G7 and H7 cannot contain 8. Then D9 cannot contain 8 and so = 3
??? 2/3 hidden pair OR 6/8 double???? H4 cannot contain 8
With 34 remaining...Chain 9 beginning at B5. Then B6, D6, D8, H8 proves B8 cannot contain 1 and so must equal 8
PB Post 2015 02 14 Lvl 6
With 29 notice 1's in rwos 2, 4, and 6 proves A7 and F5 cannot contain 1.
Color 1s to learn more.
PB Post 2015 02 07 Lvl 6
With 22 MULTI-color 6 to prove B1 and E2 cannot contain 6,
Chain 8 beginning at A1. Then B1, F1, F4, F8, F3, G3 to prove that A3 cannot
contain 9 and must equal 5
PB Post 2015 01 31 Lvl 6
Chain 8 beginning at A1. Then B1, F1, F4, F8, F3, G3 to prove that A3 cannot
contain 9 and must equal 5
PB Post 2015 02 08 Lvl 5 6
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