Yogi said : ..... I like the human questions.

The sad fact of the matter is (for you at least) that you will have to confine yourself to relatively easy puzzles (easy for this forum), that are of equal difficulty, or slightly harder than, those published in newspapers, books and popular Sudoku websites. Puzzles above a certain level of difficulty simply do not admit of constructive solutions that are human friendly. The best way you can solve them is by trial and error.

Here is an excerpt from the Hodoku Solution to the first of the WinBear provided puzzles

Almost Locked Set XY-Wing: A=r9c12568 {124569}, B=r78c9,r8c8 {1367}, C=r5c8 {79}, X,Y=7,9, Z=6 => r9c7<>6

Hidden Rectangle: 3/6 in r4c79,r7c79 => r4c7<>3

Forcing Chain Contradiction in r3c5 => r2c1<>4 r2c1=4 r2c1<>1 r3c1=1 r3c5<>1 r2c1=4 r1c2<>4 r1c2=9 r4c2<>9 r4c2=5 r4c6<>5 r45c5=5 r3c5<>5 r2c1=4 r2c79<>4 r1c9=4 r1c9<>6 r3c8=6 r3c5<>6

Forcing Net Verity => r1c2=4 r4c1=9 (r2c1<>9 r2c1=1 r3c1<>1 r3c1=4 r3c4<>4) (r4c9<>9) (r4c2<>9 r1c2=9 r1c9<>9) r4c1<>7 r5c1=7 r5c8<>7 r5c8=9 (r5c7<>9 r5c7=4 r2c7<>4) (r5c7<>9 r5c7=4 r2c7<>4) r5c9<>9 r2c9=9 r2c9<>4 r2c4=4 (r2c4<>2 r2c6=2 r2c6<>5) r2c9<>4 r1c9=4 r1c9<>6 r3c8=6 (r3c5<>6) r3c4<>6 r3c4=1 r3c5<>1 r3c5=5 r3c6<>5 r4c6=5 r4c2<>5 r4c2=9 r1c2<>9 r1c2=4 r4c2=9 r1c2<>9 r1c2=4 r5c1=9 (r2c1<>9 r2c1=1 r3c1<>1 r3c1=4 r3c4<>4) (r4c2<>9 r1c2=9 r1c2<>4) (r5c1<>7 r4c1=7 r4c4<>7) r5c8<>9 r5c8=7 (r4c7<>7) (r5c7<>7) r6c7<>7 r7c7=7 r7c4<>7 r1c4=7 r1c4<>4 r1c9=4 (r2c9<>4 r2c4=4 r2c4<>2 r2c6=2 r2c6<>5) r1c9<>6 r3c8=6 (r3c5<>6) r3c4<>6 r3c4=1 r3c5<>1 r3c5=5 r3c6<>5 r4c6=5 r4c2<>5 r4c2=9 r1c2<>9 r1c2=4

etc etc

I just love that Forcing Net Verity move - how obvious is that !

More seriously, here are some puzzles that you might like to try your hand at:

- Code: Select all
`2-String Kite`

.56.7.9...4.62..8.28...........8....73....618..5....2...........7.5...49....487.1

.617....5842.95....5..6.4.........3..25........41...26..........8.....672.....349

32..479.6..6........5.9..3.....7.......9.1..5..28..7.........7.6.3..4....5..26143

.81.2............9..68...4...31..7....8.57916........45....6.9223...84...........

Empty Rectangle

7...56.381.842.............5..3......4..8.7....1...24...3.........1....5.5...7.6.

..86........759...6..1...9.......83.9.6.....5..24.5.....5..438.3.18.2..6......2..

.3.8...7..48...1....745..69...74.951..4......7...2........1.....25.7...36.....7..

5.......3.....897.697.5...........287.3.1..........1....9..1357..8765......49....

47...........2...78..5..34..6..7..8...9.45..3.8......2741..32............9.2...5.

Kites and Empty rectangles are explained

here.

Leren