Denis Berthier Knihy

Offering a systematic exploration of Sudoku, this book delves into the logical foundations and symmetries of the game. It introduces innovative resolution rules and graphical representations, enhancing the classical xy-chains into a comprehensive set of chain rules. With a collection of puzzles and their resolution paths, it employs AI techniques to evaluate rule efficiency. The content appeals to both Sudoku enthusiasts seeking new strategies and educators or students interested in Logic and AI, all framed within a coherent conceptual structure.

Focusing on the universal classifications of finite binary Constraint Satisfaction Problems, this book explores their application to Sudoku. It introduces a specialized software, SHC, created by François Cordoliani, designed for implementing these classifications in Sudoku. The analysis of the results reveals that SHC's efficient computation times make it a valuable tool in the quest for the most challenging puzzles.

The book presents a logic-driven, pattern-based approach to solving finite Constraint Satisfaction Problems (CSP), highlighting the pursuit of the simplest solutions. It introduces various families of resolution rules, each offering unique reasoning methods that embody distinct concepts of simplicity. This second edition enhances understanding of CSP through formalized reasoning techniques, making it a valuable resource for those interested in logic puzzles and constraint satisfaction.

Focusing on a logic-driven approach, the book explores the finite Constraint Satisfaction Problem (CSP) through a pattern-based lens, aiming to identify the simplest solutions. It formalizes various reasoning methods with distinct families of "resolution rules," each embodying unique interpretations of simplicity in problem-solving. This perspective offers a fresh framework for tackling logic puzzles and constraints effectively.

Focusing on the finite Constraint Satisfaction Problem (CSP), this work presents a pure logic approach to identifying the simplest solutions. It introduces resolution theories based on constructive logic, utilizing resolution rules to eliminate candidate values for CSP variables. Various families of these theories are defined, each with a unique simplicity measure and a rating system for CSP instances. The book ensures good computational properties through the confluence property and aligns with a structured search method, using Sudoku as a key illustrative example.

Focusing on the logical symmetries of Sudoku, this book introduces innovative graphical representations and a structured set of resolution rules based on logical complexity. It includes a hundred puzzles with detailed resolution paths, enabling players to solve them without guessing. The concepts have been tested with an AI engine, providing a thorough evaluation of rule efficiency. Aimed at advanced players, educators, and students of Logic or AI, it offers a systematic approach and deepens the understanding of the game.

CSP-Rules offers a versatile, pattern-based solver for finite binary Constraint Satisfaction Problems, providing tools for a variety of logic puzzles. Available on GitHub, it features fully developed applications for popular games like Sudoku, Latin Squares (including Pandiagonal variants), Futoshiki, Kakuro, Numbrix, Hidato, Slitherlink, and Map Colouring, making it an essential resource for puzzle enthusiasts and developers alike.

Chaque nuit, des milliers d'amateurs observent et photographient les astres en se posant les mêmes questions : quelles planètes ou objets observer ? Où et quand ? Comment les photographier, et avec quel matériel ? Ce guide est destiné à répondre à toutes vos questions et à faciliter vos débuts en astronomie. - Comment observer ? Le matériel à utiliser, le fonctionnement et les performances de chaque type d'instrument et des différentes montures. - Quoi observer ? Des cibles faciles comme la Lune et le Soleil aux galaxies et nébuleuses du ciel profond, en passant par les éclipses et les planètes. - Comment photographier ? Réussir des clichés spectaculaires avec un simple 24 x 36 ; les règles d'or pour photographier les astres avec une lunette ou un télescope, au foyer ou par projection, ou avec une caméra CCD. Avec cet ouvrage, un peu de patience et un minimum d'entraînement, vous pourrez devenir vous aussi un reporter du ciel !