12 gattai variants

For fans of Killer Sudoku, Samurai Sudoku and other variants

12 gattai variants

Postby 1to9only » Sun May 13, 2018 7:53 am

I've modified my gattai-maker to also make these:

- sensei-1 [2; x1 1-nonet overlap]
- sensei-2 [2; x1 2-nonet overlap]
- tripledoku-1 [3; x2 1-nonet overlap]
- tripledoku-2 [3; x2 2-nonet overlap]
- wing-3 [3; x2 1-nonet overlap]
- wing-5 [5; x2 1-nonet overlap; x2 2-nonet overlap]

- sohei [4; ring; x4 1-nonet overlap]
- kazaguruma [5; windmill; x4 2-nonet overlap]

- 2x3 harakiri (portrait) [8; 2-1-2-1-2]
- 3x2 harakiri (landscape) [8; 3-2-3]
- 4x2 shogun [11; 4-3-4]
- 4x3 boag (baby of all gattais) [18; 4-3-4-3-4]

gattai variants [EASY]
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Code: Select all
# sensei-1 [2; x1 1-nonet overlap]
5...9..8..79..43.........19.2.....3....87.....5...2.911..458...2...1........2....
....9........8...1...536..729.4...6.....61....1.....8.72.........17..32..3..1...8

# sensei-2 [2; x1 2-nonet overlap]
..62....585.1.........9..4....785.6.......5.1.92.......6.........7.......1.......
.......2.......7.........4.......51.9.3.......6.189....8..3.........6.843....19..

# tripledoku-1 [3; x2 1-nonet overlap]
..7...6....8.25.9.9....61.4....3....15.9..27......2.5...23..........7....7..4....
...4...........95.....32....7..2...61...5...49...6..1....98.....47...........6...
....1..2....2..........65...4.6......96..4.85....7....6.84....7.7.58.3....5...9..

# tripledoku-2 [3; x2 2-nonet overlap]
....6.2.........31..81....5.3..5...8..7.96.4..42..8...2..........1........6......
......49........5.......6.78.4...31...........16...9.83.8.......9........65......
......4........1..........5...2..36..1.36.5..8...1..9.3....18..92.........8.7....

# wing-3 [3; x2 1-nonet overlap]
....81.67............36...9....4.6.1528........1....8.3...52....4.6.7....5...4...
83.92.............4...83...7.8.3..........723.9....6.....79...1...3.2.4....5...3.
...8.9......1.2............3..5.7..6.6.....7....634....3..5..1....4.6...19.....64

# wing-5 [5; x2 1-nonet overlap; x2 2-nonet overlap]
....718.21854...6.29.8...1...86..19556......8...........................8........
3.285.....5...7812.9...4.35783..21..2......84...................................8
......9.2.......17.......8...4793...7...6...9.2.........2.......3...2...91..4....
9.3......21........6..........8653..8...1...4.......8.......6.....1...5.....8..37
...9.7......3.5.......................8.7.5...57...91.7...5...4...2.4....45...19.

# sohei [4; ring; x4 1-nonet overlap]
....9.2.4...6.2...4.9..86..396...8......3...5.8....4.6...4........5........1.....
4...65............9.34.2....27......8...3.....3....821..68........6.4.....51.....
.....42.....3.6........16..724....3.....3...5......96....4.23.6............65...7
.....1........9........7...5.4....2.3...6......1...697..59..7.2...2.3...7.2.8....

# kazaguruma [5; windmill; x4 2-nonet overlap]
.5.....8.32.1..4.9...2.6...1.....7..495.....2.....51....8....1.5.........3..8.9.5
.2..15.8.8...4..31..1.6..........12.4...........1..4..6..3.1.4...7.....82...9..1.
....1..........4...8.9.5.....2...6..8.......7..7...2.....5.2.9...8..........3....
.9..3...27.....8...5.4.8..7..7..3...........8.36..........9.6..17..6...4.4.85..3.
5.2.9..6.........8.3....7....14.....8.....153..6.....9...2.9...6.5..4.92.9.....7.

# 2x3 harakiri (portrait) [8; 2-1-2-1-2]
.....9357.7.34............4.29.6..4...1..759...4......5..1.....4..9.2...9...3....
9......8..57....2...2.5.1.9.7.....164.96.........4893.........2...58........21.5.
...8........6..........4.......4.873....6.5.....2.7.......8.........6............
....62....6.......7..539....8...637....84....3....5...59..2....8.........1.......
.......1.........5....7..34...7....2....98....724...5....584..6.......9....91....
............6.........1.......9.3.....4.2....319.7.......2..........7........6...
.2.39........45...5.........7895.........41.646.....7.2.5.3.6...1....25..9......8
....8...9...4.3..1.....6..4......4...651..3...8..3.71.6............49.2.4198.....

# 3x2 harakiri (landscape) [8; 3-2-3]
2..1.3...1.....27..4..57.....8..1..24..395....6......5...6......2................
...4......8..3.1...1.....266...8.....2...37.5..712.9.....3...................7...
78.....41..1.49.7.2......8..1.2.....8.49......6.437......5..21.......5.6....9.8..
....4.........6...............6.1.28....7....5.29........58........6.......7.9...
...8.2.......4........36........47.1....5....15.6.7...............5.........6....
..7.8....5.6.......12..6......937.4......29.3.....4.2..6......2.5.46.1..19.....84
...4...................9.....1.629..6.38...1.....1...835.....4...9.2..5......5...
................7......3...3......4....862..96..4..8.....51..2..58.....4...6.9..5

# 4x2 shogun [11; 4-3-4]
...6...42.6....3.....1.9..82.6..4..91.73.....8......1462..3.....7.8..............
..4.9.7..6....13.9.938......3..19.82.7...2...5....319.......................57...
7..4...8......95....12....3..7.4.....6....4.....8673.....9.........8.........3...
.....4.75.8......13....18.2.2..53.68.9..8...7..3....1.....4.......2....3.........
....4........3.......5.....8....6...7.9.....6..1.5.........3......2.5............
....2.......8..............34..725.............743..86..............4.......8....
............2.5......4.........5.4..7.....9.5...3....6.....6.......3........9....
.........6....4.......2.....2....1..7...6..8.58.34..9.4.85....12......6.37.6.....
...7.........3.........4.....6428.....3....7.....7.2..2....35....86......1...5..8
...34.......................549....1...4...6.91.28..3......465.1.96....7..6.2.1..
..............8.5.....7..2174......5.....26.99..7..8.24..8.3.....6....8.57...6...

# 4x3 boag (baby of all gattais) [18; 4-3-4-3-4]
.......8.312.4.9....4..2.5...1.......38.9.....5.1.3..............3264........1...
....42....286....4.9.18.....4..3...1....1...6..1....58...4.......................
..9..45..1.7.6.4..6..3..8.7..2.71..8.......52.7...23.....9.........8.............
........9..3124....5.....8....9.2..8..97...4.3.2.6.........76.......3.92...5...7.
....8.................5.....1.9.....5.23..7..38...2.6.............5..............
....5.......28.......3.........92.......3.9.........35...9.......................
.............5........8.......4.1...3.....2.6..7..5.......14......2.6........9...
4..156...5....2....26.34...84.2........8.3.4.3....7.....4................8..9....
....2.......3.4........9...5.........37....8.....8.1.......7.......16.......48...
...29.......56.......8.......5.8.....1....35.........8...6........4.7.......5....
....7..5................9.....6....3.3.8.5........1.62...14.23....5....4...362..1
...2........5.3......87.......7..6..7.1.....8...6.4.......5........3.............
.......................8...73.........9.6.......92.........9.......34.......7....
..............4.............7.8...92..8..65.7.....7.1.....3.................8....
.3...6...24.1.......18.........6.2.8.1...84..6..7.2....5.....4....4159..8........
.............2.........4.....67...8.38.......2..84.9..7.5..9..3..4.6.8.9..81..4..
.......................9...28....6..1...6....6...3..7.....73.9.5....642....54....
...1........2384..............6.5.8.....4.39.......7...6.7..8....8.5.273.3.......

gattai variants [MEDIUM]
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# sensei-1 [2; x1 1-nonet overlap]
.3.....8...17.6.5...812....5.7.....9........5.8.5..41.4..8.........67.....5..4...
...2..3.....91.........5..1.25..7.3.9........3.....8.4....691...5.8.34...6.....2.

# sensei-2 [2; x1 2-nonet overlap]
....7..62..5..8..1.3....4...6.......4....682...1497.3.1..................2.......
.......8..................3.2.7619...743....5.......3...6....5.2..8..6..59..4....

# tripledoku-1 [3; x2 1-nonet overlap]
9....4..7.5..8......325..............4.618..379.4..2.8.7.........43......32......
...5..8......6.3.........9..18..9.7.2.7...5.9.9.2..68..7.........1.3......5..1...
......85......86.........3.4.1..5.735..173.2..............412......8..4.3..2....7

# tripledoku-2 [3; x2 2-nonet overlap]
9....61..........7.8.971..2.275..4.1...12......6..7.29..8.................9......
......5.........6.......19...2.6...58.......45...4.3...69.......2.........8......
......1.................8..24.5..6......68...7.6..431.9..345.2.3..........21....4

# wing-3 [3; x2 1-nonet overlap]
...47..6..963...2.....9....2....46...619....38.9....1...5......4...3.....3..1....
.5..42....9...762.....1......68....79....456..7....2.3......3......7...6....6..5.
...1.5.........................8....12..5..98...4.2.....87.92..49.....15....3....

# wing-5 [5; x2 1-nonet overlap; x2 2-nonet overlap]
..8.....39..5.7.1863....5....5.7.28....1...4..9.......58.......4..........2......
3.....1..85.7.6..4..6....97.97.5.3...1...9..........7........19........2......5..
................19.........69.58...1.2.6.1..88....9..............3.4....9.5......
.........67................3...27.411..5.6.8....3....2.............7.2........7.3
...6.8.......9.............94.....71.2..1..8..........8.......2...1.9....1.5.7.4.

# sohei [4; ring; x4 1-nonet overlap]
...67489.9.6.8.217...1.....2...457.....9..48......6.32.....................2.....
.9...4...15..97...72.65....8..7.1...23.8.....5.6.2...8.8.................7.1.....
.....3.7.................1.9...6.3.7.....4.98...9.1..4....79.56...14..39...3...4.
.....8.....................65.1......12..6.....753...9.....5...765.9.1.8.28471...

# kazaguruma [5; windmill; x4 2-nonet overlap]
.5....96.1..4..7..3.....2.4...94...58..1.....62...8.1...8.................1.3...8
...67.25....3....65.6..........92.3.3....1......8...........375...4....29....64..
...............3...3...8.....5.....................9.....4...1...7...............
..81....56....8...259...........7......2....7.1.85..........8.47....4....64.85...
4...1.3.................6...7.2...86.....7..59...54...8.9.....7..2..8..3.57....2.

# 2x3 harakiri (portrait) [8; 2-1-2-1-2]
56.......2.8374........8......61..3..8.4..1...7..8..56.2.7......19..3.....7......
......5...4.7.3...1.......3.....46..6.4..2.7532.....8....5....8...3...96...4.8..1
.....7........................4....3..9..2..5.6...59......76......1.4............
..6..5.....7.4......1.6.....2..175...65.....2.......1.4...78......9........6.....
.....9........5......47...2.1.......4.....15...653..8.....8.3......5.8.....1..7..
............4.7......13......78...5.2..5..9..5....1........................6.....
4..3.1...13...9...2....6....8.....9379.5..2.8..38.....3.......1...4.2.3...6......
......3.....4..25......1.7.75..3..9...1..4.2..4..92......6........9234.5.......36

# 3x2 harakiri (landscape) [8; 3-2-3]
.38.71.....5...9.12.....87..2..1.4.6...26.....9...4.2.3..72.............4....8...
.7.3...45.63.54.1..4..1...9.....2...5.48..9.....47..5........................5...
......35.......9.8.8..7..6..3...45..4.86.....62...841.....27...............58.6.7
.....3...............6........1.....4.12.7.9.3...9.57.....8..................6...
...1..................3.....65.8...7.8.3.46.2.....1........6...............5.....
6.8.31...............72.....521...73.....42.5..15...4..7..4..5.1.4.......35......
...9........................9..31.....3..47.1...8.....3...4..6..7.28.13.81...3.7.
...4....2.............83..5.1.2...3.....18...8.9.3..5..48.....61.7...9.....34.51.

# 4x2 shogun [11; 4-3-4]
...2.3.......8.....76.5..93348.9.....69.4.3.57......8..8.7.6...412.3.............
.7....54..9.....71.84.....2...85.....2..719.47.......3...9........4.7........6...
....9...117...3.....9.......17..98...2.43.7..5..68................5........91....
3.4.........6....49.6.75.8..3.5.......7....9.1..2.743........7.....61..8....3....
.....8.................2.......71...........5..25..1..............1..........9...
.......................4........13..38..4..75..27........9.......................
...4..........8..............9..21..5...........74.......8.................3.....
....7....3..12.....6........742.5..1.9....6.......4.9..1.65.7.22....7.........1.9
....56........4................19..8..9.28.6...83..12.......3.....5...979...4....
...7........8.2........3...2.......98.329..5.....35...6.....19.34.....2..21....4.
.............3.154...1.8.9..6......95.9.6.34.....7.86165..1.93.....9.......4.5...

# 4x3 boag (baby of all gattais) [18; 4-3-4-3-4]
.4.1..5...12.7.........46.1.....396..8..5....2.7.4...3.....5...36.2.........6....
8.....6.5..56.......9.2........4.8.......8.2.3....9.6.............3........9.....
.........1.7.3..29....2..577.93....28...72......6...8.....8.........3........7...
71...8....8......75.67...........1..9..3....8....7624.....4...3....1.4.6...2.3...
....4........2.........1....2167..3....4...6.......2................8......1.....
...8.........7.........1........82...6.29..84....1........86........2............
..............4........3.....9.2.68.1.....7.37..6.........5................71....
.6.......92........1.9........462....8.....4........5.3...86...8....5.....23.4...
....7................2.8.........98.8..614.3..3......6...46......................
......................69...3......1..9.425..8.84.........2.7................9....
...8.79.....2....8...41...2.2........7.....9....179........8.1........85.......6.
....63................7.........7..22.8.....6.96.4.3.....7........2..............
............9........23........2....73..91.6...13........7.........8.........2...
.....5......7................8.......2...4....4..7912....2.........5........6....
...4.9...4.2.8....1...2.....9425....5....8..6..7...........36.77......2....5...81
...8........6.........3.....7...5......18...38....35.969..2....34..9.6.2.........
.....1........4.............8.6....7.5.4.......2.3........8.2.......25..2.1.....3
....8.........7.53...1.....7...6.1.9....7..3..213.....1.46.........1.94...5..9.8.

gattai variants [HARD]
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Code: Select all
# sensei-1 [2; x1 1-nonet overlap]
6..8..4.....95.....3...1.9.7.3........8..935....2.3..7..1.9......5..2....4...5...
...6...7....1..2......3.8..6..8.7....194..5........9.3.2.7...9.....49.....4..1..8

# sensei-2 [2; x1 2-nonet overlap]
5.6..1.2.....4..5.38.....9...5.....31...86....6852......7.......2.......6........
........7.......3.......5......6891....51...39.....7...9.....75.5..9.....2.3..4.9

# tripledoku-1 [3; x2 1-nonet overlap]
4..7125...7.....913.....8.47.316..............629.4...1....6....8...........4....
.................9...2.63...786.2....36.1.92....3.716...45.1...5.................
....1...........8....2....9...9.246..............375.13.4.....587.....4...9641..7

# tripledoku-2 [3; x2 2-nonet overlap]
...5813....5.732.98...9....296........4....6..8......3..........4........57......
......89..................6...2..5..9.2.1.3.8..5..8...7..................48......
......27........6..........8......9..1....6........758....9...77.386.9....8127...

# wing-3 [3; x2 1-nonet overlap]
..672..41.4...98.....5....9..8..6.1..6.2......2518..736..8..........1.....9......
36..542....46...3.5....8....3.4..1.......3.5.74..1632......5..2...1...........5..
....2.......8.9................4....8.......1.9.378.2.5..9.6..2.6.1.2.8.....3....

# wing-5 [5; x2 1-nonet overlap; x2 2-nonet overlap]
.3.4...7...8.........8.9.5..92..7.31..........7..835..5.1........7......3........
.4...2.9.......7...6.8.1...41.9..82............273..5.......2.4......1..........5
.........................6..5.9...2..6.1..74...7..439......9......6.1...7.92.....
...................8........5...7.6..34..8.9..914..8.....8........9.3........14.6
.............3........7.......5.6.....5.2.9..16.4.9.572...4...8............952...

# sohei [4; ring; x4 1-nonet overlap]
45689.....2....5.....1..4......183.5..85..76..3......4...2.........4........5....
...3.6.......1.....5387.......9.....2..1...583.5.6.7..7...8....51...3...9........
........5...9...13....5...9..8.7.9.436...1..7.....3.......6235.....8.......7.5...
....6........7.........4...2......4..14..53..7.814......1..7.....2....6.....86213

# kazaguruma [5; windmill; x4 2-nonet overlap]
.13..6...8.6.9.4....58..6...7.4..........814.15..3...2.........5......8.......3.9
.7.1...6....2.4..3......972.....81.....3...8.....5...79...8.42..2..4....4..9.....
.............8.......3.9.....7...9...4..7..2...6...4.....6.8.......2.............
.....6..7....2..4..39.1...61...8.....5...9.....61.....317......4..9.1....2...8.6.
6.8.......2......6.........2...1..78.816..........9.2...5..72....4.6.5.3...5..96.

# 2x3 harakiri (portrait) [8; 2-1-2-1-2]
.3..64....6.12....194..7..5..7.9.314.89......4......8.8.........7..4........1....
3....2.....1.9.......5...2.1.........8.4.753..6...3.8....3.4.68...27.4.......8.1.
....8.........3.............1..7.......6.........2.981...2........3........5.....
2....8...3........6.9......1..5.3......2...13........2.6..7....9.1......8...69...
...28...6......1.9....6..5.5........24...7......6.5..2......3.8........5...4....1
.....4........3........9...347.5.........8.......9..5.............8.........3....
.4.2.......8.51...93.4.7....5.7...3..925.8.1.........5.6...9.......4.7.....1....6
....5........1..9.........4.2......1......94.671.3.8..7..8..419....91.3....54..6.

# 3x2 harakiri (landscape) [8; 3-2-3]
...3.6.84....579.2...4.1..5.8......3.26...7..4........8...1....9..2......5.7.....
.6...2.....4....9..9..5.362.1.79.2....781.6.3..56................................
......5.2.9...2..1....4.79.8.....9.53...7..2..27.6...3...79.......1.3......8.....
...8..................5...........856...8......1..6.......39......167............
............743......68.......9..6......3...954...........7..................9...
.....4......7.8.......91...7...1.94..4..7...19.2.....8.75.8....1..4...6.6.8......
................................13..8.9.731....4.95.8.396.2..7..8....4.....1...3.
.....2.8......8..6....9...4........1..5...42.7......9.6..8.7...8.394....27.3.1...

# 4x2 shogun [11; 4-3-4]
56......71..29..8..2....63........18.85..74......8..6..3...4.....9..2.....76.....
.....49.8....73....5..8.327.7.3..2..4..7.8.......6.5.....6..........7............
.45.7..68.2...975...........1..8.239...2.5...............4........63........9....
.....2...9...6.42.......1.78..5......7....5.33.24.1.6....3...71.....8........6...
....3............................124.6.3.........2.......9.........4.......8.6...
............7.8.............68..72......2......13..48.............5.6............
...1.6.......5.........8.......1.........7.2.961............................4....
...4........2.....67...5....2.1.94.69.4....8......4..54.1.......83.4...2...6.....
....2........53........9...............6.2...534.9..6...........813...5.94..8.73.
............5..........1.....6.9.......6.3..1..7..4.3.468.1..9....35....9.58.....
.....48.....2..9.....5...4..6..8......86..75.53........71....9..9..23..48......27

# 4x3 boag (baby of all gattais) [18; 4-3-4-3-4]
35....9....46.9.7...6...3.85.31..6...2.56...3...........9.5.......9.....2...4....
...89....692...73.....2.1..8...........97...442.5.........6.......2.........5....
6...2.1...8.....6..3.1.....7....6.4...5..2.3.9...5.2.....34......................
4.6....3...23...6.38..7..2.7..96.....2.7..6...532.4........715.............8..3..
...4........52........1......3......97...8...684....................1......97....
....7.........1.......46.....9..7....4..8...5.6851...............................
.............3.......97.....41.6....276.83.....8.4..........................5....
..73..............62...9...9..1.5..6...8....7.829..5....8.9.....4..2......3.1....
..............1........5...4..6.2...2......63....13.2.............8..........7...
...3..........8.............9.83....35......4...4.7..5...7........5..............
....6.9......7..4.....2.1....7..643.2....7...5..3.1..9...9...54..............53..
....9..........................3.6.....76.291....8.34.....42.......7.............
...............................2719.1...5..6....1..8.....51.......2.........3....
....17......9....................913...7...28......7......8........93........6...
..2..8.............987........1.632...6..7.9.....82..4.6..4..82.2...59...8....5.6
......................48.....6.1...9.5.9..3...3.8....7.....2.7..8.....4...2.8...5
....2.........3.......1.........6.737...94...........9..1.6.....53...867....59...
....4...1.....8.......1.6...........7...69.4...8..27.95.6...9...4.9.15....2....87

The gattai variants are included in a zip file attached below - for each variant there is one each of Easy, Medium and Hard puzzle.

The puzzles' difficulty levels are as follows:
Easy - requires only naked and hidden singles to solve.
Medium - cannot be solved by 'Easy' methods, requires locked candidates, naked and hidden pairs to complete.
Hard - cannot be solved by 'Medium' methods, requires other advanced methods (currently naked and hidden triples and quads, and the basic fishes) to finish solving.

I named the 4x3 boag, and will discard it if a name for it already exists; I prefer this on 2 printed sheets, but the harakiris and fat samurai on a single page are also likable.

The 4-nonet overlaps (Sensei-4 and TripleDoku-4) cannot be created by this gattai-maker! - either more solving methods in the solver will help, or making them will require an amount of human intervention!

All the puzzles created have no givens in the connecting boxes (nonets). The Kazaguruma is an exception, it could only be created if I relax this rule, so I've allowed this. I think the Sensei-4 and TripleDoku-4 can also be created if this rule is relaxed, but I have not tried. Many of the puzzles I see on the Internet have givens in the nonets!

The attached files are in same formats as before - they contain gattai-maker outputs in sudoku lines, spreadsheet paste and raw compact formats, followed by the gattai solution in the same formats. The filenames are in the form: [gattai-type]-[datetime-generated].[level] with a '.sud' file extension.
Attachments
gattai-variants.zip
gattai variants in .sud files
(60.75 KiB) Downloaded 3 times
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Re: 12 gattai variants

Postby 1to9only » Sun May 13, 2018 7:56 am

There is a limit of 3 attachments per post, so the Pdf files for the gattai variants are below.
Attachments
gattai-variants-easy-pdf.zip
12 variants in pdf - easy
(176.75 KiB) Downloaded 7 times
gattai-variants-medium-pdf.zip
12 variants in pdf - medium
(175.84 KiB) Downloaded 4 times
gattai-variants-hard-pdf.zip
12 variants in pdf - hard
(173.53 KiB) Downloaded 4 times
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Re: 12 gattai variants

Postby enxio27 » Sun May 13, 2018 11:26 pm

Wow, you have outdone yourself! Great timing, too--I just finished a puzzle that I've been working on for more than a week.
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Re: 12 gattai variants

Postby creint » Mon May 14, 2018 7:39 pm

All solved with solver

Medium variants not requiring locked sets:
# sensei-2 [2; x1 2-nonet overlap]
....7..62..5..8..1.3....4...6.......4....682...1497.3.1..................2.......
.......8..................3.2.7619...743....5.......3...6....5.2..8..6..59..4....

# sohei [4; ring; x4 1-nonet overlap]
...67489.9.6.8.217...1.....2...457.....9..48......6.32.....................2.....
.9...4...15..97...72.65....8..7.1...23.8.....5.6.2...8.8.................7.1.....
.....3.7.................1.9...6.3.7.....4.98...9.1..4....79.56...14..39...3...4.
.....8.....................65.1......12..6.....753...9.....5...765.9.1.8.28471...

# kazaguruma [5; windmill; x4 2-nonet overlap]
.5....96.1..4..7..3.....2.4...94...58..1.....62...8.1...8.................1.3...8
...67.25....3....65.6..........92.3.3....1......8...........375...4....29....64..
...............3...3...8.....5.....................9.....4...1...7...............
..81....56....8...259...........7......2....7.1.85..........8.47....4....64.85...
4...1.3.................6...7.2...86.....7..59...54...8.9.....7..2..8..3.57....2.


The following hard variant is solvable with singles and locked singles only.
# sensei-2 [2; x1 2-nonet overlap]
5.6..1.2.....4..5.38.....9...5.....31...86....6852......7.......2.......6........
........7.......3.......5......6891....51...39.....7...9.....75.5..9.....2.3..4.9


The following hard variant needs chains or fish besides locked sets.
# wing-3 [3; x2 1-nonet overlap]
..672..41.4...98.....5....9..8..6.1..6.2......2518..736..8..........1.....9......
36..542....46...3.5....8....3.4..1.......3.5.74..1632......5..2...1...........5..
....2.......8.9................4....8.......1.9.378.2.5..9.6..2.6.1.2.8.....3....


All other hard variants only need locked sets and no fish.
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Re: 12 gattai variants

Postby 1to9only » Tue May 15, 2018 8:38 am

All solvers are not created equal, specifically in the order of application of solving techniques, there is some consensus amongst some solvers, but no rule (that I've seen that says) that the order must be such and so. I'm happy with my humble solver, it works well for me, and I much like the way it figures the difficulty levels of sudoku puzzles. In reality, the difficulty level is subjective and is only meant to give a human solver an indication of how long it might take to solve a particular puzzle.

I provide Pdfs of all the puzzles - to download, print on paper, and solve by pencil (or pen) - it's more enjoyable!

“All animals solvers are equal, but some animals solvers are more equal than others.”
- George Orwell, Animal Farm. - 1to9only, axiom.
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Re: 12 gattai variants

Postby Hajime » Tue May 15, 2018 11:42 am

A fine set of gattai's. Thank you.
1to9only wrote:I provide Pdfs of all the puzzles - to download, print on paper, and solve by pencil (or pen) - it's more enjoyable!

I fully agree! And indeed the order-sequence of solving methods in a solver is important and makes it distinctive.
Soon I will publish an "irregular ? clueless", probably very hard for solvers, but moderate for humans.
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Re: 12 gattai variants

Postby enxio27 » Tue May 15, 2018 2:29 pm

1to9only wrote:I provide Pdfs of all the puzzles - to download, print on paper, and solve by pencil (or pen) - it's more enjoyable!


I agree with this, as well. In my world, solvers have three functions: to create the puzzle in the first place (including validity checking), to print the puzzle (with pencil marks), and (on rare occasions) give me a hint when I get stuck. Even with multi-grid puzzles, where I have to manually copy eliminations from one grid to another, I would rather work them on paper.

Bragging about how fast your solver solved a puzzle seems to me to be nothing more than male-part-measuring. There are sets of benchmark puzzles for that sort of thing.
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Re: 12 gattai variants

Postby enxio27 » Tue May 15, 2018 2:29 pm

Hajime wrote:Soon I will publish an "irregular ? clueless", probably very hard for solvers, but moderate for humans.

I'm looking forward to that!
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