I extracted a random sample of 1,000 puzzles from the collection of 158, 276 min-expands in T&E(3).
I didn't let SER run until the end. In the first 110, I found 37 with "low" SER (with uniqueness enabled).
- Code: Select all
...4.67.9.......3....1.2.4.2....1..8.38.2.1..6.1.48...3.486.....62.1.......2...6. ED=10.6/2.6/2.6
....56....5.1.9...69.37..1........3.37....6.2......8.473.6.59...1579.3..9.6...... ED=10.4/2.0/2.0
12...6...4.7...2..689.23................7...8...83..42.7.2.84...6..47.23.4.36.8.7 ED=10.4/4.0/2.6
..345..8945......3.8.73.....9.....3537....8.45.....97......43.883.21....94..6.... ED=9.3/4.5/2.6
12.4.6.............8..31...2.....645...164..8.6....17..4.6.83..6..34.8..83..124.. ED=10.4/5.4/2.6
...45.........9.3.79.213....1.8.....6.....81.98..6..7336....19..71...3.88.9....67 ED=10.9/10.0/7.1
.2..5....4......3668..37....76.15.4.....7......13.46.75..7...647..5..1.3.....357. ED=10.4/2.6/2.6
.2.......45..89...9.83.2........38613.....925....2.3.....8..4...392.45..84...5... ED=10.4/2.0/2.0
1..4.678....18..3.8.........3.6.8.17...3..46..6...4....42.61...6.5.43....7....64. ED=10.4/2.0/2.0
....567.....1..26.6..3.2...27...4...3.4..867..68..34.27.6...82.84....3.....8...4. ED=10.1/9.4/2.6
1.3.56...4.6....3..89.31.............6..7.4.3..7.6..153..61...76..3.7.4.....453.6 ED=10.4/4.5/2.6
12....7..4.71.9....98.7241..8..14....7492......17.8...........87.2...65.8.9...3.. ED=10.4/10.4/3.4
12..56..9.57..9..66.9.7..............76.2195.91...526.......43.7......9.....12... ED=10.5/4.5/2.6
..3.5678...718..3...8...1......38..737.5..6.858.67.31.7.6..5...84......39.......1 ED=10.4/2.8/2.6
..34........78.......2.156..41...3..6.5...94.9....4.1.31.94.65.5.436..91......4.. ED=10.3/4.5/2.6
1...5.7.9.57...26.6.9.2..512.....91.............2.16.55..8.4...76.395.......725.. ED=10.9/2.0/2.0
12..5.7.9..7...26.6...2..512.....91..1.......97....6.5...8.4...76.395.......7259. ED=10.9/7.1/7.1
...4.678.4....9.366..3....4...8.3.97....97....7.64.8.339576....71..3....86....37. ED=10.4/2.0/2.0
1.3.......57..9...8.6.23................3.4.8.34.18.923...4192....39.8.19..8.2..3 ED=10.9/2.0/2.0
.2.......4.71.923...9..7.4...48.1.......72.1....6.5...3.....1.2..1...39.9.2.1..74 ED=11.2/2.0/2.0
1...56....5.1.9.6.69.73..5...169.3.553..71....69......37......8.1....4.2......53. ED=10.4/4.5/2.6
1.3.5678..57....3.68...........1.96.3.1....75......4..5..67....7.8.31......5.8..7 ED=11.0/2.0/2.0
1..4.6...4.6.89......21..642.4.............37.....12.5.629.48..84.1..9..9.1...... ED=9.2/2.6/2.6
1...56.8....18...66..2.7.152357.....79.......81.....72..28.51.7...........16...28 ED=10.3/2.0/2.0
.23..6......78.....89231....3.........8.4392...4..8..73.2...89..9.8..4.384.3...7. ED=11.0/2.6/2.6
12.4.6......1......86.274........5.6...6.4.72.6....194.712....864.7.8...8.2.....7 ED=10.3/2.0/2.0
....56....5.18..3.68.3.7.1..16..8...73.5.1...8..............9...7....46....7.3.58 ED=11.2/2.0/2.0
1.3.......5...9...78....54....96.8......4562....8.2.9.6.2...45..........9..6.42.8 ED=10.6/8.3/2.6
1.345....45...91...97.3........9346.374...91.....4...2...3.4.71....7....7..91..5. ED=10.6/2.0/2.0
..34.678.4.6......78..23....3..48...64.2.7..88..36.....6....912...6.28.7......65. ED=10.9/4.5/2.6
...4.678.......2.6.....2.45231..7...796..8.....5....7.....65.....482..6...87..52. ED=10.4/2.6/2.6
12....7.94..1..23........1.29..4....3.4.1..72.71.3.49.....219..74...8...91.5..... ED=11.0/10.2/2.6
1.3.5.....57.8..3668..7.5.1.......583.58..16...8...3.75.6..4.......3..1...19..... ED=10.9/10.4/2.6
...4.6.8.....89...79813.....17......5.9.1...783..9..51........5.75....1898.5...3. ED=10.4/3.0/2.6
1...56....5.18...686.7.3....85...36.63.8.5.....1...85.37.....9......76.3.1....4.7 ED=10.4/2.0/2.0
12........567..12.7.82.156.2.....49.68..............15...5.8....6..17.....762.... ED=10.5/3.4/2.6
1...567.....1.92..6.927.5..261...9......2164......5128.....7...5.6.92...7...1...2 ED=10.9/2.0/2.0
Without uniqueness (option -M), all of them are 11.6 or 11.7.
BTW, CSP-Rules has functions for randomly extracting puzzles: see http://forum.enjoysudoku.com/csp-rules-sudorules-kakurules-t38200-114.html
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