Datasets:

imone
/

sudoku-hard-v2

source stringclasses 8 values	question stringlengths 81 81	answer stringlengths 81 81	rating int64 0 465
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puzzles4_forum_hardest_1905	.2.1..9.4....2.6....3.94..5..497..5..1...24.7....4..6...6.............8..9..1.7.6	827165934459328671163794825384976152615832497972541368236487519741659283598213746	95
puzzles4_forum_hardest_1905	.7.4...1.5......42.....17...5.6...2...4..8...3...5...9.85..9..66..8......39.6.2..	873426915591387642426591738957614823264938157318752469185249376642873591739165284	27
puzzles4_forum_hardest_1905	.....4....4.37.1..7..61........5..8.4....73..1.9..3..5.7.2...196....12....2......	961584732845372196723619548237156984456897321189423675374265819698741253512938467	57
puzzles4_forum_hardest_1905	..5.89....6..57.8....6.....38........5...3..1..98...3.....4.2..1.87....4..65...7.	735189642462357189891624753384271965657493821219865437573948216128736594946512378	44
puzzles4_forum_hardest_1905	..8.63..1..4..2.8..1..4.5......7......3..9.7.7.....3.693...4...84.2...3...2......	278563491564192783319847562685371924423659178791428356936784215847215639152936847	8
puzzles4_forum_hardest_1905	79.....1.12...75....5.......4.8..1.5..7..4.9.........43...6......23...78..1..2.5.	798653412124987563635421987943876125517234896286195734379568241452319678861742359	11
puzzles4_forum_hardest_1905	8...6.....6...87.....4....8..3..7.25.2.....76......3...3...52..2...9..1.47.1..5..	817263954964518732352479168193647825528931476746852391631785249285394617479126583	13
puzzles1_unbiased	..8..23412........9......5.........4..3..89.7....53....6.3.1.7...7.4.8...5.8.9...	678592341235184796914736258182967534543218967796453182869321475327645819451879623	0
puzzles4_forum_hardest_1905	13...89....8......79.....8....6..4....3..9.7..5..2.8....1..7.9....5....6....4.2..	134768952528914367796352184819675423243189675657423819461237598382591746975846231	4
puzzles1_unbiased	.....5.......7.5..4..628....21.4.9.7.....2..879.3....4..2....7..7...38..63....4.2	917435286268179543453628791821546937346792158795381624182964375574213869639857412	3
puzzles1_unbiased	.56...2..3......9...........4....38....5......7243...1.2..68..9.6...5.2...931.65.	456891273317254896298673415945126387631587942872439561524768139163945728789312654	0
puzzles1_unbiased	8....3...5...2...14.96.57.....1..3.9.....4..2.5.93..6....2..6......5..7.76.3.....	817493526536728941429615738642187359973564812158932467385271694294856173761349285	4
puzzles1_unbiased	.7.2...3.6.............78....5..96...12.6..8....57.......6...9.8..725.434....3..2	578216439693458271124937856345189627712364985986572314237641598869725143451893762	0
puzzles1_unbiased	....3.4.2.18.9......47..8....64.2....29......5...8.....3.17..6.......19..5...8...	795836412218594376364721859876412935129653784543987621432179568687245193951368247	1
puzzles4_forum_hardest_1905	.41.8...7......8........14..3.8..7..2....3....76.1..8....5....69....4....67.3.4..	341985627792641835685327149439856712218793564576412983124578396953164278867239451	54
puzzles1_unbiased	4..........2.4.7.68.3..5.....5.719.....3..2....1.........9.68...36.1..2......4.13	417682395952143786863795142385271964649358271271469538124936857536817429798524613	5
puzzles1_unbiased	.52.....8...4.7.....8....6.4.5..69.......9.1..6...1.4..86....3...453..........29.	152693478693487152748125369415876923827349516369251847286914735974532681531768294	0
puzzles1_unbiased	4.....8....3.2467..56.7.......1...3.3...8..1...9.37........8..1.2.4..3.7.4.....9.	497316852183524679256879143872145936364982715519637284635798421928451367741263598	4
puzzles0_kaggle	6..15.4...4269...3......8...6...57...738....5..1.26.4985..4.92...92671..1.7....3.	698153472742698513315472896264935781973814265581726349856341927439267158127589634	0
puzzles5_forum_hardest_1905_11+	...4..97..97..6..12......6..75..1.9.....8..........1.5.2......9.51..96......3....	536418972897326451214957368375241896149685237682793145723164589451879623968532714	16
puzzles4_forum_hardest_1905	..43.......7...8...2..76..429.4............1...6.97..2.6...3..........5.4...29..6	514382697637945821829176534298431765375268419146597382961753248782614953453829176	18
puzzles4_forum_hardest_1905	..5.....49....3.2.....7.....9...21..3.....2.....38..9.16...9.8.2....861....6.....	835126974976843521421975863597462138318597246642381795163259487254738619789614352	58
puzzles4_forum_hardest_1905	..9...2...84..1...6..9...84....5.....9.8...36.......2...86...43....7....36....9..	759438261284761359613925784146253897592847136837196425978612543425379618361584972	40
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puzzles4_forum_hardest_1905	.6.4..5.........9.3...1.....4.2..7....7.....8.287..6...5...4.6......24.....6...75	869423517214857396375916842143268759697345128528791634752184963936572481481639275	23
puzzles4_forum_hardest_1905	.7..63..1..39.1.2...15...........4..1...97..6.6.......79...5........68....6.3...7	279863541653941728481572963327618495145297386968354172792185634534726819816439257	32
puzzles4_forum_hardest_1905	.8..432....5.8...4...7....8.2..94..3....7.92.6..............3..1..3......3..29.8.	781643259265981734943752618527194863314876925698235471852417396179368542436529187	49
puzzles4_forum_hardest_1905	2...8.....3....7.81....3.2..1..2..7....3....5.7..15.3.......9...2..3..8...46.....	245781396936254718187963524513426879862397145479815632758142963621539487394678251	105
puzzles4_forum_hardest_1905	.5..8......41..9..1....9.2...83..7...7...4..9.....2.1..9.6...5...3.4...66....83..	259483671784126935136579428918365742372814569465792813897631254523947186641258397	7
puzzles4_forum_hardest_1905	...6....82..4..6......13..9.....9.....52...8..1..7...2.7......35.4...2..6.....85.	149625738283497615756813429327589146965241387418376592872154963534968271691732854	25
puzzles4_forum_hardest_1905	.9.....6...8...5.33.2.....4..4.5...8.7.1.9....2..4.........7..9...6...1.2...8.3..	497315862618472593352968174134756928875129436926843751541237689783694215269581347	11
puzzles4_forum_hardest_1905	1....82.....9...65....5....3....21.....7...4...9.6..7..31..4..8.42...3..8........	165348297423917865798256431374592186516783942289461573931624758642875319857139624	15
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01_file1	...9....6.....3.2...1..2.7.51.3........7...4.4....63....6..429..4.69...7.3.2.7...	723915486694873125851462973519348762362759841487126359176534298248691537935287614	31
01_file1	.14.8.73...8......63.1.7..4..3.4....8..3.146.1.......7...2......76...2........9.6	914685732758423691632197584563749128827351469149862357495276813376918245281534976	22
01_file1	4......7..5.7..8.....2.9.5.5.3..7..464...8....78...63..6..9..4..8.....6.3.......5	432865179956741823817239456593617284641328597278954631765192348184573962329486715	35
01_file1	5...9.1.61.3..5.92.6..2..3...1.....9.5....3....6..7..1...87......2...6..9..2....5	527398146143765892869124537781532469254619378396487251615873924472951683938246715	28
01_file1	6..4.3..18..51......4.6835...7.5.1.....3....4....8.5..72..........1..6...6..4..8.	659473821832519746174268359297654138518327964346981572723896415485132697961745283	10
01_file1	6.5....4.7...9.68..8..4.7.5..8..1.6...6....9..7....5....4...8..9..4...7....21.9..	635187249741592683289643715598321467126754398473869521314976852952438176867215934	24
puzzles1_unbiased	......79.7....6..21.........8.....34.541..2......2.5.8.7.4.5..6...6...7..2.8.93..	863241795745396182192758643281567934954183267637924518379415826518632479426879351	1

End of preview. Expand in Dataset Viewer.

Hardest Sudoku Puzzle Dataset V2

This dataset contains a mixture of easy and very hard Sudoku puzzles collected from the Sudoku community.

Dataset Composition

Sources

Easy Puzzles (1.1M)

puzzles0_kaggle
puzzles1_unbiased
puzzles2_17_clue

Hard Puzzles (3.1M)

puzzles3_magictour_top1465
puzzles4_forum_hardest_1905
puzzles6_forum_hardest_1106
ph_2010/01_file1.txt

Dataset Characteristics

All puzzles have been exact-deduped and randomly permuted by row, column, box, and digit.
Each puzzle is guaranteed to have a unique solution.
Puzzles in the train set are mathematically inequivalent to those in the test set.

Dataset Structure

Train set: train.csv (3.8M examples)
Test set: test.csv (423k examples)

Puzzles and solutions are flattened in row-major order. Rating is evaluated by number of backtracks needed by tdoku solver required to solve the puzzle (higher is harder).

Usage Guidelines

Train models using only the train set.
Evaluate models on the test set using exact accuracy (all numbers must be correct).

Downloads last month: 40

Size of downloaded dataset files:

798 MB

Size of the auto-converted Parquet files:

471 MB

Number of rows:

4,254,780