This book is a comprehensive guide to the two-move chess problem that will delight chess lovers. Extensively illustrated. Contents Include: Introduction; Definitions; The Key; Themes. Based on Black Defence; Themes. Based on Black Mistakes; Mating Strategy; Combination Themes; Changed and Added Mates; Construction; Composing; Solving and Analysing; New Developments; Index of Names; General Index. This book contains classic material dating back to the 1900s and before. The content has been carefully selected for its interest and relevance to a modern audience.

The Arthur M. Sackler Colloquia of the National Academy of Sciences address scientific topics of broad and current interest, cutting across the boundaries of traditional disciplines. Each year, four or five such colloquia are scheduled, typically two days in length and international in scope. Colloquia are organized by a member of the Academy, often with the assistance of an organizing committee, and feature presentations by leading scientists in the field and discussions with a hundred or more researchers with an interest in the topic. Colloquia presentations are recorded and posted on the National Academy of Sciences Sackler colloquia website and published on CD-ROM. These Colloquia are made possible by a generous gift from Mrs. Jill Sackler, in memory of her husband, Arthur M. Sackler.

Is chess an art, a science or a sport? This is one of the most commonly asked questions about chess, but it admits of no easy answer. Most chess activities involve a combination of all three components, but different areas of chess emphasize different aspects. The sporting element predominates in the over-theboard game, while the protracted battles of postal chess stress the scientific side. The third element, the artistic component, finds its best expression in the field of chess composition. Over the- board players often ignore composed positions, or if they do pay attention, they concentrate on endgame compositions of direct relevance to practical play. In turning their backs on the world of chess problems, they are missing out on a great deal of enjoyment. It is true that studying chess problems will never improve anybody's play, but not everything has to have a strictly functional justification. The many fascinating examples which follow can give a great deal of pleasure to anyone interested in seeing the chess pieces stretched to their limits. This book will conduct the reader on a detailed tour around one part of the world of chess composition.

From the author of The Black Bird Oracle comes a fully illustrated guide to the #1 New York Times bestselling All Souls series—“an irresistible . . . wonderfully imaginative grown-up fantasy” (People). Look for the hit series “A Discovery of Witches,” now streaming on AMC+, Sundance Now, and Shudder! A world of witches, vampires, and daemons. A manuscript that holds the secrets of their past and the key to their future. Diana and Matthew—the forbidden love at the heart of the adventure. In The World of All Souls, Deborah Harkness shares the rich sources of inspiration behind her bewitching novels. She draws together synopses, character bios, maps, recipes, and even the science behind creatures, magic, and alchemy—all with her signature historian's touch. Bursting with fascinating facts and dazzling artwork, this essential handbook is a must-have for longtime fans and eager newcomers alike.

This is a revised and expanded edition by Ron Auch. Divorce statistics are growing at an unprecedented rate. And there appears to be no end in sight. Families are being torn apart. Lives are being shattered. It's happening in the world. It's happening in the Church. But there is a solution.