29 <p>I hereby gratefully acknowledge the valuable contributions of my vetters, Eva Casey, Alan Wadja, Dr. Fumitaka Hayashi, Joanne Phipps, Dr. Masaaki
30 Hamaguchi, and my son Randall Bradley, all of whose incisive comments, suggestions, and sharp eyed spotting of errors have greatly improved and refined
31 this book’s presentation. But above all, special thanks are due to Bill Cobb, whose sparse but very incisive comments have been of invaluable assistance
34 <p>Except for a few changes resulting from vetter’s comments, the book’s design, selection of topics included, illustrative materials chosen, and analyses
48 <p>In order that this tradeoff be fair, it’s ultimately necessary that the thickness be converted into an amount of territory at least equivalent to what the opponent has already acquired.
57 <p>To be sure there are circumstances in which thickness forms the basis for a large moyo, much of which may then sometimes become actual territory. But that’s the exception rather than the rule! In most cases, the function of such a moyo is to force the opponent to act against it before it can be consolidated! And then, as it should, the thickness becomes a fighting weapon against which, like rocks in the sea, the opponent’s invaders will hopefully be dashed to their death!
68 <p ALIGN="center"><strong>Fig 1</strong> In this position from a game between a 2D and 1D, Black has just played the ideal splitting move of B1 to invade the big White left side moyo while reducing the influence of White’s thickness - but carefully not too close to it. (More about that in Proverb 17.)
86 <p><strong>Dia 1</strong> W2 here would be a major mistake! Not only does it create only a tiny territory, but it’s far too close to White’s own thickness to be efficient.
87 It would also allow the ideal two point third line skip of B3 to expand Black’s own base while restricting and threatening the still incomplete White corner formation above.
101 <p><strong>Dia 2</strong> Correct is the squeeze play of W2 from above, forming an ideal extension from and reinforcement of his upper left corner stones, while pushing Black toward the White thickness below.
120 <p><strong>Fig 2</strong> Although the two point third line skip to B3 here seems logical it’s actually a serious error, because it comes much too close to the White thickness below!
122 <p>With excellent tactical followup play this error need not necessarily lead to a disaster for Black, but this diagram and those that follow show how readily a few relatively minor mistakes can lead to just such an outcome!
126 <p>Jumping to B7 was certainly important, but it was badly timed because it allowed W8 to force B9 (else with W10 at 9 White would be safe and Black wouldn’t even have one sure eye without another local move).
128 <p>Now White would like to enclose Black with W10 at “c”, to leave him without sufficient space to make two eyes unless he defends immediately, but he can’t afford to attempt this until his left side group is safe, so ...
142 <p><strong>Fig 3</strong> After this sequence thru W14 assured White’s life on the left edge, Black awoke to his danger and played B15 to assure his second eye for the corner stones..
158 <p><strong>Dia 3</strong> By following this simple sequence thru W22, Black could have lived in Sente on the bottom, and then readily made shape above with B23 to force W24..
167 <p><I><strong>The key lesson to be learned here is that although the immediate cause of Black’s loss in this game was his tactical errors, that situation would not ever have even arisen if he hadn’t first made
170 <p>I'm pleased to announce that the publication by <a href="http://www.yutopian.com/go"><strong>Yutopian</strong></a> <a href="http://www.yutopian.com/go"></a> of my new book for intermediates
