亚洲欧美第一页_禁久久精品乱码_粉嫩av一区二区三区免费野_久草精品视频

? 歡迎來到蟲蟲下載站！ | ?? 資源下載 ?? 資源專輯 ?? 關于我們
? 蟲蟲下載站

?? rotated bitboards.htm

?? 介紹各種經典算法的代碼。說明詳細
?? HTM
字號: 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- saved from url=(0053)http://wwwipd.ira.uka.de/Tichy/DarkThought/node8.html -->
<!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998)originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from:  Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>Rotated Bitboards</TITLE>
<META content="Rotated Bitboards" name=description>
<META content=dt name=keywords>
<META content=document name=resource-type>
<META content=global name=distribution>
<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type><LINK 
href="Rotated Bitboards.files/dt.css" rel=STYLESHEET>
<META content="MSHTML 5.00.2014.210" name=GENERATOR></HEAD>
<BODY>
<H3><A name=SECTION00124200000000000000>&nbsp;</A> <A name=bboard-rot>&nbsp;</A> 
<BR>Rotated Bitboards </H3>
<P>Vectors of attack masks for all pieces on each square of an otherwise empty 
chess board enable an easy attack detection for sliding pieces without having to 
loop over the squares of the respective diagonals, files, and ranks&nbsp;[<A 
href="http://wwwipd.ira.uka.de/Tichy/DarkThought/node95.html#bbrd:attack-det">207</A>]. 
This loop-less attack-detection scheme operates on consecutive strings of bits 
representing the rays of squares potentially covered by the sliding piece. In 
order to really excel, it therefore requires efficient access to consecutive 
strings of ray bits. As listed below, the normal row-major mapping of squares to 
bits in a bitboard consecutively aligns the bits of each file. Hence, it only 
provides efficient access to consecutive strings of file bits. 
<P><B>Normal Bitboard. </B>
<TABLE border=1 cellPadding=3>
  <TBODY>
  <TR>
    <TD align=right><B>#7</B></TD>
    <TD align=right><B>#6</B></TD>
    <TD align=right><B>#5</B></TD>
    <TD align=right><B>#4</B></TD>
    <TD align=right><B>#3</B></TD>
    <TD align=right><B>#2</B></TD>
    <TD align=right><B>#1</B></TD>
    <TD align=right><B>#0</B></TD>
    <TD align=right><B>Bit/Byte</B></TD></TR>
  <TR>
    <TD align=right>a8</TD>
    <TD align=right>b8</TD>
    <TD align=right>c8</TD>
    <TD align=right>d8</TD>
    <TD align=right>e8</TD>
    <TD align=right>f8</TD>
    <TD align=right>g8</TD>
    <TD align=right>h8</TD>
    <TD align=right><B>#7</B></TD></TR>
  <TR>
    <TD align=right>a7</TD>
    <TD align=right>b7</TD>
    <TD align=right>c7</TD>
    <TD align=right>d7</TD>
    <TD align=right>e7</TD>
    <TD align=right>f7</TD>
    <TD align=right>g7</TD>
    <TD align=right>h7</TD>
    <TD align=right><B>#6</B></TD></TR>
  <TR>
    <TD align=right>a6</TD>
    <TD align=right>b6</TD>
    <TD align=right>c6</TD>
    <TD align=right>d6</TD>
    <TD align=right>e6</TD>
    <TD align=right>f6</TD>
    <TD align=right>g6</TD>
    <TD align=right>h6</TD>
    <TD align=right><B>#5</B></TD></TR>
  <TR>
    <TD align=right>a5</TD>
    <TD align=right>b5</TD>
    <TD align=right>c5</TD>
    <TD align=right>d5</TD>
    <TD align=right>e5</TD>
    <TD align=right>f5</TD>
    <TD align=right>g5</TD>
    <TD align=right>h5</TD>
    <TD align=right><B>#4</B></TD></TR>
  <TR>
    <TD align=right>a4</TD>
    <TD align=right>b4</TD>
    <TD align=right>c4</TD>
    <TD align=right>d4</TD>
    <TD align=right>e4</TD>
    <TD align=right>f4</TD>
    <TD align=right>g4</TD>
    <TD align=right>h4</TD>
    <TD align=right><B>#3</B></TD></TR>
  <TR>
    <TD align=right>a3</TD>
    <TD align=right>b3</TD>
    <TD align=right>c3</TD>
    <TD align=right>d3</TD>
    <TD align=right>e3</TD>
    <TD align=right>f3</TD>
    <TD align=right>g3</TD>
    <TD align=right>h3</TD>
    <TD align=right><B>#2</B></TD></TR>
  <TR>
    <TD align=right>a2</TD>
    <TD align=right>b2</TD>
    <TD align=right>c2</TD>
    <TD align=right>d2</TD>
    <TD align=right>e2</TD>
    <TD align=right>f2</TD>
    <TD align=right>g2</TD>
    <TD align=right>h2</TD>
    <TD align=right><B>#1</B></TD></TR>
  <TR>
    <TD align=right>a1</TD>
    <TD align=right>b1</TD>
    <TD align=right>c1</TD>
    <TD align=right>d1</TD>
    <TD align=right>e1</TD>
    <TD align=right>f1</TD>
    <TD align=right>g1</TD>
    <TD align=right>h1</TD>
    <TD align=right><B>#0</B></TD></TR></TBODY></TABLE>
<P>A column-major mapping of squares to bits in a bitboard, however, 
consecutively aligns the bits of each rank. Consequently, such flipped bitboards 
allow for efficient access to consecutive strings of rank bits. 
<P><B>Flipped Bitboard. </B>
<TABLE border=1 cellPadding=3>
  <TBODY>
  <TR>
    <TD align=right><B>#7</B></TD>
    <TD align=right><B>#6</B></TD>
    <TD align=right><B>#5</B></TD>
    <TD align=right><B>#4</B></TD>
    <TD align=right><B>#3</B></TD>
    <TD align=right><B>#2</B></TD>
    <TD align=right><B>#1</B></TD>
    <TD align=right><B>#0</B></TD>
    <TD align=right><B>Bit/Byte</B></TD></TR>
  <TR>
    <TD align=right>a8</TD>
    <TD align=right>a7</TD>
    <TD align=right>a6</TD>
    <TD align=right>a5</TD>
    <TD align=right>a4</TD>
    <TD align=right>a3</TD>
    <TD align=right>a2</TD>
    <TD align=right>a1</TD>
    <TD align=right><B>#7</B></TD></TR>
  <TR>
    <TD align=right>b8</TD>
    <TD align=right>b7</TD>
    <TD align=right>b6</TD>
    <TD align=right>b5</TD>
    <TD align=right>b4</TD>
    <TD align=right>b3</TD>
    <TD align=right>b2</TD>
    <TD align=right>b1</TD>
    <TD align=right><B>#6</B></TD></TR>
  <TR>
    <TD align=right>c8</TD>
    <TD align=right>c7</TD>
    <TD align=right>c6</TD>
    <TD align=right>c5</TD>
    <TD align=right>c4</TD>
    <TD align=right>c3</TD>
    <TD align=right>c2</TD>
    <TD align=right>c1</TD>
    <TD align=right><B>#5</B></TD></TR>
  <TR>
    <TD align=right>d8</TD>
    <TD align=right>d7</TD>
    <TD align=right>d6</TD>
    <TD align=right>d5</TD>
    <TD align=right>d4</TD>
    <TD align=right>d3</TD>
    <TD align=right>d2</TD>
    <TD align=right>d1</TD>
    <TD align=right><B>#4</B></TD></TR>
  <TR>
    <TD align=right>e8</TD>
    <TD align=right>e7</TD>
    <TD align=right>e6</TD>
    <TD align=right>e5</TD>
    <TD align=right>e4</TD>
    <TD align=right>e3</TD>
    <TD align=right>e2</TD>
    <TD align=right>e1</TD>
    <TD align=right><B>#3</B></TD></TR>
  <TR>
    <TD align=right>f8</TD>
    <TD align=right>f7</TD>
    <TD align=right>f6</TD>
    <TD align=right>f5</TD>
    <TD align=right>f4</TD>
    <TD align=right>f3</TD>
    <TD align=right>f2</TD>
    <TD align=right>f1</TD>
    <TD align=right><B>#2</B></TD></TR>
  <TR>
    <TD align=right>g8</TD>
    <TD align=right>g7</TD>
    <TD align=right>g6</TD>
    <TD align=right>g5</TD>
    <TD align=right>g4</TD>
    <TD align=right>g3</TD>
    <TD align=right>g2</TD>
    <TD align=right>g1</TD>
    <TD align=right><B>#1</B></TD></TR>
  <TR>
    <TD align=right>h8</TD>
    <TD align=right>h7</TD>
    <TD align=right>h6</TD>
    <TD align=right>h5</TD>
    <TD align=right>h4</TD>
    <TD align=right>h3</TD>
    <TD align=right>h2</TD>
    <TD align=right>h1</TD>
    <TD align=right><B>#0</B></TD></TR></TBODY></TABLE>
<P>In the case of diagonals, the necessary mappings prove to be more complex. 
The number of diagonals amounts to 15 in each of the two directions a1-h8 and 
a8-h1. Furthermore, diagonals are of variable lengths ranging from 1 to 8. 
Because not all diagonals can be stuffed into separate bytes of a bitboard the 
mapping must pack some together in a clever way. 
<P>Figuratively, viable mappings can be deduced as follows: slice a normal 
bitboard along one of the main diagonals (a1-h8 or a8-h1), then rotate the half 
with the squares of the main diagonal to lie at the bottom, and finally paste 
the other half such that it results in a parallelogram. As shown below, the 
diagonalized mappings of squares to bits in a bitboard consecutively align the 
bits of each a1-h8 and a8-h1 diagonal. Thus, diagonalized bitboards enable 
efficient access to consecutive strings of diagonal bits if the ends of the 
diagonals (as marked by vertical bars) are known. 
<P><B>A1-H8 Bitboard. </B>
<TABLE border=1 cellPadding=3>
  <TBODY>
  <TR>
    <TD align=right><B>#7</B></TD>
    <TD align=right><B>#6</B></TD>
    <TD align=right><B>#5</B></TD>
    <TD align=right><B>#4</B></TD>
    <TD align=right><B>#3</B></TD>
    <TD align=right><B>#2</B></TD>
    <TD align=right><B>#1</B></TD>
    <TD align=right><B>#0</B></TD>
    <TD align=right><B>Bit/Byte</B></TD></TR>
  <TR>
    <TD align=right>a8</TD>
    <TD align=right>| b1</TD>
    <TD align=right>c2</TD>
    <TD align=right>d3</TD>
    <TD align=right>e4</TD>
    <TD align=right>f5</TD>
    <TD align=right>g6</TD>
    <TD align=right>h7</TD>
    <TD align=right><B>#7</B></TD></TR>
  <TR>
    <TD align=right>a7</TD>
    <TD align=right>b8</TD>
    <TD align=right>| c1</TD>
    <TD align=right>d2</TD>
    <TD align=right>e3</TD>
    <TD align=right>f4</TD>
    <TD align=right>g5</TD>
    <TD align=right>h6</TD>
    <TD align=right><B>#6</B></TD></TR>
  <TR>
    <TD align=right>a6</TD>
    <TD align=right>b7</TD>
    <TD align=right>c8</TD>
    <TD align=right>| d1</TD>
    <TD align=right>e2</TD>
    <TD align=right>f3</TD>
    <TD align=right>g4</TD>
    <TD align=right>h5</TD>
    <TD align=right><B>#5</B></TD></TR>
  <TR>
    <TD align=right>a5</TD>
    <TD align=right>b6</TD>
    <TD align=right>c7</TD>
    <TD align=right>d8</TD>
    <TD align=right>| e1</TD>
    <TD align=right>f2</TD>
    <TD align=right>g3</TD>
    <TD align=right>h4</TD>
    <TD align=right><B>#4</B></TD></TR>
  <TR>
    <TD align=right>a4</TD>
    <TD align=right>b5</TD>
    <TD align=right>c6</TD>
    <TD align=right>d7</TD>
    <TD align=right>e8</TD>
    <TD align=right>| f1</TD>
    <TD align=right>g2</TD>
    <TD align=right>h3</TD>
    <TD align=right><B>#3</B></TD></TR>
  <TR>
    <TD align=right>a3</TD>
    <TD align=right>b4</TD>
    <TD align=right>c5</TD>
    <TD align=right>d6</TD>
    <TD align=right>e7</TD>
    <TD align=right>f8</TD>
    <TD align=right>| g1</TD>
    <TD align=right>h2</TD>
    <TD align=right><B>#2</B></TD></TR>
  <TR>
    <TD align=right>a2</TD>
    <TD align=right>b3</TD>
    <TD align=right>c4</TD>
    <TD align=right>d5</TD>
    <TD align=right>e6</TD>
    <TD align=right>f7</TD>
    <TD align=right>g8</TD>
    <TD align=right>| h1</TD>
    <TD align=right><B>#1</B></TD></TR>
  <TR>
    <TD align=right>a1</TD>
    <TD align=right>b2</TD>
    <TD align=right>c3</TD>
    <TD align=right>d4</TD>
    <TD align=right>e5</TD>
    <TD align=right>f6</TD>
    <TD align=right>g7</TD>
    <TD align=right>h8</TD>
    <TD align=right><B>#0</B></TD></TR></TBODY></TABLE>
<P>
<P>
<P><BR><B>A8-H1 Bitboard. </B>
<TABLE border=1 cellPadding=3>
  <TBODY>
  <TR>
    <TD align=right><B>#7</B></TD>
    <TD align=right><B>#6</B></TD>
    <TD align=right><B>#5</B></TD>
    <TD align=right><B>#4</B></TD>
    <TD align=right><B>#3</B></TD>
    <TD align=right><B>#2</B></TD>
    <TD align=right><B>#1</B></TD>
    <TD align=right><B>#0</B></TD>
    <TD align=right><B>Bit/Byte</B></TD></TR>
  <TR>
    <TD align=right>a8</TD>
    <TD align=right>b7</TD>
    <TD align=right>c6</TD>
    <TD align=right>d5</TD>
    <TD align=right>e4</TD>
    <TD align=right>f3</TD>
    <TD align=right>g2</TD>
    <TD align=right>h1</TD>
    <TD align=right><B>#7</B></TD></TR>
  <TR>
    <TD align=right>a7</TD>
    <TD align=right>b6</TD>
    <TD align=right>c5</TD>
    <TD align=right>d4</TD>
    <TD align=right>e3</TD>
    <TD align=right>f2</TD>
    <TD align=right>g1</TD>
    <TD align=right>| h8</TD>
    <TD align=right><B>#6</B></TD></TR>
  <TR>
    <TD align=right>a6</TD>
    <TD align=right>b5</TD>
    <TD align=right>c4</TD>
    <TD align=right>d3</TD>
    <TD align=right>e2</TD>
    <TD align=right>f1</TD>
    <TD align=right>| g8</TD>
    <TD align=right>h7</TD>
    <TD align=right><B>#5</B></TD></TR>
  <TR>
    <TD align=right>a5</TD>
    <TD align=right>b4</TD>
    <TD align=right>c3</TD>
    <TD align=right>d2</TD>
    <TD align=right>e1</TD>
    <TD align=right>| f8</TD>
    <TD align=right>g7</TD>
    <TD align=right>h6</TD>
    <TD align=right><B>#4</B></TD></TR>
  <TR>
    <TD align=right>a4</TD>
    <TD align=right>b3</TD>
    <TD align=right>c2</TD>
    <TD align=right>d1</TD>
    <TD align=right>| e8</TD>
    <TD align=right>f7</TD>
    <TD align=right>g6</TD>
    <TD align=right>h5</TD>
    <TD align=right><B>#3</B></TD></TR>
  <TR>
    <TD align=right>a3</TD>
    <TD align=right>b2</TD>
    <TD align=right>c1</TD>
    <TD align=right>| d8</TD>
    <TD align=right>e7</TD>
    <TD align=right>f6</TD>
    <TD align=right>g5</TD>
    <TD align=right>h4</TD>
    <TD align=right><B>#2</B></TD></TR>
  <TR>
    <TD align=right>a2</TD>
    <TD align=right>b1</TD>
    <TD align=right>| c8</TD>
    <TD align=right>d7</TD>
    <TD align=right>e6</TD>
    <TD align=right>f5</TD>
    <TD align=right>g4</TD>
    <TD align=right>h3</TD>
    <TD align=right><B>#1</B></TD></TR>
  <TR>
    <TD align=right>a1</TD>
    <TD align=right>| b8</TD>
    <TD align=right>c7</TD>
    <TD align=right>d6</TD>
    <TD align=right>e5</TD>
    <TD align=right>f4</TD>
    <TD align=right>g3</TD>
    <TD align=right>h2</TD>
    <TD align=right><B>#0</B></TD></TR></TBODY></TABLE>
<P>For historical reasons, diagonalized and flipped bitboards are both called 
rotated. In order to fully exploit the benefits of rotation, 
D<SMALL>ARK</SMALL>T<SMALL>HOUGHT</SMALL> incrementally updates rotated 
bitboards with 1-bits for all occupied squares of the current position. 
Additionally, it manages compressed vectors of rotated attack masks that strike 
a good balance between instruction and memory efficiency. 
<P><BR>
<HR>

<ADDRESS>Created by <A href="mailto:heinze@ira.uka.de">Ernst A. Heinz</A>, Thu 
Feb 4 14:12:12 MET 1999 </ADDRESS></BODY></HTML>

?? 快捷鍵說明

復制代碼 Ctrl + C
搜索代碼 Ctrl + F
全屏模式 F11
切換主題 Ctrl + Shift + D
顯示快捷鍵 ?
增大字號 Ctrl + =
減小字號 Ctrl + -
亚洲欧美第一页_禁久久精品乱码_粉嫩av一区二区三区免费野_久草精品视频
色偷偷久久人人79超碰人人澡| 亚洲综合一区二区| 国产不卡视频一区| 国产欧美一区二区精品久导航| 国产精品一区二区在线观看不卡| 2021中文字幕一区亚洲| 国产成人a级片| 亚洲欧洲精品天堂一级| 色狠狠综合天天综合综合| 亚洲成国产人片在线观看| 欧美一区二区精美| 国产一区二区三区免费看| 中文字幕av不卡| 在线一区二区三区| 免费在线观看一区二区三区| 精品国产91久久久久久久妲己| 国产一区二区三区电影在线观看 | 精品久久久久一区| 国产精品一区二区免费不卡| 一色屋精品亚洲香蕉网站| 色琪琪一区二区三区亚洲区| 日韩精品一区第一页| 国产亚洲欧美激情| 色悠悠久久综合| 青青国产91久久久久久| 国产精品丝袜一区| 欧美高清www午色夜在线视频| 免费观看在线综合色| 国产精品理论在线观看| 欧美另类videos死尸| 国产aⅴ精品一区二区三区色成熟| 中文字幕欧美一区| 欧美tickling网站挠脚心| 成人午夜伦理影院| 五月天网站亚洲| 欧美大片顶级少妇| 91久久线看在观草草青青| 日韩精品亚洲一区| 久久久久久久久久久黄色| 99视频超级精品| 丝瓜av网站精品一区二区| 亚洲精品在线观看网站| 色综合色狠狠天天综合色| 亚洲美女视频在线观看| 91社区在线播放| 国产精品一区二区久久精品爱涩| 亚洲老妇xxxxxx| 精品久久久久久久久久久久久久久| 成人福利电影精品一区二区在线观看| 亚洲午夜久久久久久久久久久 | 粉嫩13p一区二区三区| 亚洲欧美二区三区| 精品捆绑美女sm三区| 色视频一区二区| 精品午夜久久福利影院| 亚洲一区在线视频| 国产免费观看久久| 日韩欧美久久一区| 欧美天天综合网| 高清国产一区二区| 青青草国产成人av片免费| 亚洲丝袜精品丝袜在线| 久久久青草青青国产亚洲免观| 在线精品视频一区二区三四| 国产精品自拍在线| 全部av―极品视觉盛宴亚洲| 国产精品美女久久福利网站| 色菇凉天天综合网| 成人激情黄色小说| 国产一区在线观看麻豆| 日韩中文字幕亚洲一区二区va在线 | 国产精品亚洲综合一区在线观看| 亚洲一区在线观看免费| 国产精品嫩草99a| 久久综合九色综合97婷婷女人| 欧美日本一区二区| 色欧美乱欧美15图片| 成人不卡免费av| av激情亚洲男人天堂| 国产乱人伦偷精品视频免下载| 奇米影视在线99精品| 亚洲国产成人精品视频| 亚洲毛片av在线| 中文字幕一区不卡| 国产精品视频线看| 精品成人在线观看| 欧美成人欧美edvon| 欧美一区二区私人影院日本| 欧美日韩高清一区二区不卡| 欧美亚洲一区三区| 色综合天天狠狠| aa级大片欧美| 91在线免费看| 在线视频一区二区三区| 91美女蜜桃在线| 91欧美一区二区| 菠萝蜜视频在线观看一区| av资源网一区| 91麻豆成人久久精品二区三区| 成人的网站免费观看| 不卡的av网站| 在线亚洲一区二区| 欧美日韩免费高清一区色橹橹 | 久久久精品人体av艺术| 欧美经典一区二区| 国产精品久久久一区麻豆最新章节| 久久久不卡影院| 国产精品久久久久天堂| 亚洲裸体在线观看| 午夜一区二区三区在线观看| 日本欧美一区二区三区乱码| 久久99深爱久久99精品| 国产成人免费在线观看不卡| 不卡一区二区中文字幕| 欧美在线色视频| 日韩一区二区三区免费观看| xvideos.蜜桃一区二区| 国产精品视频线看| 一区av在线播放| 亚洲免费视频中文字幕| 日韩av一二三| 成人午夜激情视频| 在线观看91精品国产入口| 91精品国产综合久久福利软件| 精品久久一二三区| 国产精品色呦呦| 亚洲成人一二三| 日本不卡一区二区| av亚洲精华国产精华精华| 欧美精品免费视频| 国产亚洲欧美色| 亚洲电影中文字幕在线观看| 极品少妇xxxx精品少妇| 91麻豆产精品久久久久久| 日韩午夜激情av| 国产精品人人做人人爽人人添| 视频一区二区三区中文字幕| 国产精品白丝av| 欧美另类高清zo欧美| 国产精品免费aⅴ片在线观看| 亚洲午夜激情网站| 国产成人精品网址| 欧美丰满美乳xxx高潮www| 国产午夜精品一区二区三区视频| 亚洲成人激情社区| 成人免费观看男女羞羞视频| 欧美精选一区二区| 国产精品成人免费| 精品亚洲免费视频| 欧美乱妇15p| 中文字幕欧美三区| 国产一区二区三区在线观看精品| 色综合婷婷久久| 国产人成一区二区三区影院| 五月天亚洲婷婷| 99久久综合国产精品| 国产蜜臀av在线一区二区三区| 免费在线观看视频一区| 欧美亚洲一区三区| 中文字幕中文字幕在线一区| 国产在线精品一区二区三区不卡| 精品视频123区在线观看| 久久午夜免费电影| 日韩成人免费电影| 欧美日韩午夜在线| 亚洲精品欧美二区三区中文字幕| 国产风韵犹存在线视精品| 精品伦理精品一区| 日本成人在线网站| 欧美剧在线免费观看网站 | 日韩欧美色综合网站| 亚洲国产色一区| 91啪在线观看| 国产精品国产三级国产aⅴ中文 | 欧美剧在线免费观看网站| 亚洲欧美日本在线| 成人美女在线视频| 欧美极品aⅴ影院| 国产精品一级黄| 国产亚洲一区二区三区| 国产美女精品人人做人人爽| 日韩精品一区国产麻豆| 麻豆高清免费国产一区| 精品国一区二区三区| 毛片不卡一区二区| 91麻豆精品91久久久久久清纯| 一区二区在线观看免费| 欧洲一区二区三区免费视频| 亚洲小说欧美激情另类| 欧美日韩一区二区在线视频| 一区二区在线观看不卡| 欧美放荡的少妇| 久久精品av麻豆的观看方式| 精品不卡在线视频| 国产精品一级在线| 国产精品免费丝袜| 91麻豆免费在线观看| |精品福利一区二区三区| 欧美日韩日日骚| 九九在线精品视频|