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Proven Jigsaw Sudoku (Paperback or Softback)
Edité par
Proven Puzzles 6/1/2026, 2026
ISBN 10 : 1608887995
ISBN 13 : 9781608887996
Neuf
Paperback or Softback
Vendeur : BargainBookStores, Grand Rapids, MI, Etats-Unis
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Paperback or Softback. Etat : New. Proven Jigsaw Sudoku. Book. N° de réf. du vendeur BBS-9781608887996
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EUR 24,59
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Expédition nationale : Etats-Unis
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Proven Jigsaw Sudoku (Proven Puzzles)
Vendeur : California Books, Miami, FL, Etats-Unis
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Etat : New. N° de réf. du vendeur I-9781608887996
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EUR 26,34
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Proven Jigsaw Sudoku (Paperback)
impression à la demandeVendeur : Grand Eagle Retail, Bensenville, IL, Etats-Unis
Évaluation du vendeur 5 sur 5 étoiles
Paperback. Etat : new. Paperback. Jigsaw sudoku replaces the familiar three-by-three boxes of ordinary sudoku with irregular nine-cell regions that snake across the grid like puzzle pieces. Row and column constraints remain a " each row and column still contains the digits one through nine exactly once a " but the box constraint is now interpreted over the irregular shapes. The variant is sometimes called "squiggly sudoku" or "geometric sudoku," but "jigsaw" captures the feel of solving one most accurately: your eye, trained over years to snap to three-by-three blocks, must learn to trace region boundaries that meander. The initial adjustment is perceptual more than logical. A few puzzles in, you will begin to see that irregular regions actually provide more cross-elimination opportunities than standard boxes, because a jigsaw region can span more rows and more columns than a three-by-three square ever could. A region that spans four different rows constrains four rows at once; a region that spans five different columns constrains five columns at once. The reasoning you develop in jigsaw sudoku carries over to ordinary sudoku and makes you a better solver of the standard variant as well. This book contains 200 jigsaw puzzles, every one generated by our constraint-satisfaction engine and verified by exhaustive backtracking to have exactly one solution. The difficulty range runs from genuinely easy introductions a " suitable for a reader who has never attempted a jigsaw grid before a " through expert puzzles that exploit the extra reach of irregular regions in ways that are impossible in standard sudoku. At the expert end, some puzzles use regions that span seven or eight different rows, which is impossible in a standard sudoku box and which creates long chains of row-based elimination that no ordinary sudoku technique can match. Each puzzle carries a cryptographic hash under its answer grid so the puzzlea "solution pair can be independently verified. The classic jigsaw technique that surprises readers new to the variant is "law of leftovers" if you take any set of whole rows and then subtract the jigsaw regions that fall entirely within those rows, the remaining cells form a set that must contain a specific multiset of digits. This is the jigsaw cousin of the Rule of 45 from killer sudoku, and it is the most powerful single technique in the variant. The rules page at the front of this book introduces law of leftovers with a worked example, and the first several puzzles in the gentle section are designed to exercise it. None of the puzzles in this collection require guessing. Every one is solvable by pure logical deduction. That is the guarantee we make on every title in the Proven Puzzles line, and it is backed by a verification pipeline that rejects any grid that admits zero or multiple solutions. The puzzles that reached this book are the ones our solver signed off on, and the SHA-256 hash under every answer grid lets you confirm it. The Editor's Note in this volume is signed by our Euler AI persona a " an artificial mind trained upon the letters and treatises of Leonhard Euler (1707a "1783), speaking here in a modern English rendering of that voice; it discusses jigsaw technique with an emphasis on why the extra rows and columns that irregular regions span are your friend rather than your enemy. Contents: Publisher's Note on the verification process, Euler AI's Editor's Note on jigsaw technique, rules page with worked law-of-leftovers example, 200 verified puzzles arranged from approachable through expert, complete answer key with verification line for every grid, methodology section, and production notes. Typeset in Avenir Next on 70 lb bright white paper; perfect bound; 6 x 9 inches. 200 algorithmically verified Jigsaw puzzles with complete solutions. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability. N° de réf. du vendeur 9781608887996
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EUR 28,30
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Expédition nationale : Etats-Unis
Expédition nationale : Etats-Unis
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Proven Jigsaw Sudoku
Vendeur : PBShop.store US, Wood Dale, IL, Etats-Unis
Évaluation du vendeur 5 sur 5 étoiles
PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur L2-9781608887996
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EUR 29,60
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Proven Jigsaw Sudoku
Vendeur : PBShop.store UK, Fairford, GLOS, Royaume-Uni
Évaluation du vendeur 5 sur 5 étoiles
PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur L2-9781608887996
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EUR 26,69
Expédition à EUR 4,85
Expédition depuis Royaume-Uni vers Etats-Unis
Expédition depuis Royaume-Uni vers Etats-Unis
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Proven Jigsaw Sudoku
impression à la demandeVendeur : AHA-BUCH GmbH, Einbeck, Allemagne
Évaluation du vendeur 5 sur 5 étoiles
Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - 200 algorithmically verified Jigsaw puzzles with complete solutions. N° de réf. du vendeur 9781608887996
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EUR 22,24
Expédition à EUR 35
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Proven Jigsaw Sudoku (Paperback)
impression à la demandeVendeur : CitiRetail, Stevenage, Royaume-Uni
Évaluation du vendeur 5 sur 5 étoiles
Paperback. Etat : new. Paperback. Jigsaw sudoku replaces the familiar three-by-three boxes of ordinary sudoku with irregular nine-cell regions that snake across the grid like puzzle pieces. Row and column constraints remain a " each row and column still contains the digits one through nine exactly once a " but the box constraint is now interpreted over the irregular shapes. The variant is sometimes called "squiggly sudoku" or "geometric sudoku," but "jigsaw" captures the feel of solving one most accurately: your eye, trained over years to snap to three-by-three blocks, must learn to trace region boundaries that meander. The initial adjustment is perceptual more than logical. A few puzzles in, you will begin to see that irregular regions actually provide more cross-elimination opportunities than standard boxes, because a jigsaw region can span more rows and more columns than a three-by-three square ever could. A region that spans four different rows constrains four rows at once; a region that spans five different columns constrains five columns at once. The reasoning you develop in jigsaw sudoku carries over to ordinary sudoku and makes you a better solver of the standard variant as well. This book contains 200 jigsaw puzzles, every one generated by our constraint-satisfaction engine and verified by exhaustive backtracking to have exactly one solution. The difficulty range runs from genuinely easy introductions a " suitable for a reader who has never attempted a jigsaw grid before a " through expert puzzles that exploit the extra reach of irregular regions in ways that are impossible in standard sudoku. At the expert end, some puzzles use regions that span seven or eight different rows, which is impossible in a standard sudoku box and which creates long chains of row-based elimination that no ordinary sudoku technique can match. Each puzzle carries a cryptographic hash under its answer grid so the puzzlea "solution pair can be independently verified. The classic jigsaw technique that surprises readers new to the variant is "law of leftovers" if you take any set of whole rows and then subtract the jigsaw regions that fall entirely within those rows, the remaining cells form a set that must contain a specific multiset of digits. This is the jigsaw cousin of the Rule of 45 from killer sudoku, and it is the most powerful single technique in the variant. The rules page at the front of this book introduces law of leftovers with a worked example, and the first several puzzles in the gentle section are designed to exercise it. None of the puzzles in this collection require guessing. Every one is solvable by pure logical deduction. That is the guarantee we make on every title in the Proven Puzzles line, and it is backed by a verification pipeline that rejects any grid that admits zero or multiple solutions. The puzzles that reached this book are the ones our solver signed off on, and the SHA-256 hash under every answer grid lets you confirm it. The Editor's Note in this volume is signed by our Euler AI persona a " an artificial mind trained upon the letters and treatises of Leonhard Euler (1707a "1783), speaking here in a modern English rendering of that voice; it discusses jigsaw technique with an emphasis on why the extra rows and columns that irregular regions span are your friend rather than your enemy. Contents: Publisher's Note on the verification process, Euler AI's Editor's Note on jigsaw technique, rules page with worked law-of-leftovers example, 200 verified puzzles arranged from approachable through expert, complete answer key with verification line for every grid, methodology section, and production notes. Typeset in Avenir Next on 70 lb bright white paper; perfect bound; 6 x 9 inches. 200 algorithmically verified Jigsaw puzzles with complete solutions. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability. N° de réf. du vendeur 9781608887996
Acheter neuf
EUR 31,23
Expédition à EUR 43,16
Expédition depuis Royaume-Uni vers Etats-Unis
Expédition depuis Royaume-Uni vers Etats-Unis
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Proven Jigsaw Sudoku
impression à la demandeVendeur : preigu, Osnabrück, Allemagne
Évaluation du vendeur 5 sur 5 étoiles
Taschenbuch. Etat : Neu. Proven Jigsaw Sudoku | Euler Ai | Taschenbuch | Proven Puzzles | Englisch | 2026 | Proven Puzzles | EAN 9781608887996 | Verantwortliche Person für die EU: Libri GmbH, Europaallee 1, 36244 Bad Hersfeld, gpsr[at]libri[dot]de | Anbieter: preigu Print on Demand. N° de réf. du vendeur 135558924
Acheter neuf
EUR 31,10
Expédition à EUR 70
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Expédition depuis Allemagne vers Etats-Unis
Quantité disponible : 5 disponible(s)