<?xml version="1.0"?>
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	<id>https://www.vigyanwiki.in/index.php?action=history&amp;feed=atom&amp;title=Module%3AChessboard</id>
	<title>Module:Chessboard - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://www.vigyanwiki.in/index.php?action=history&amp;feed=atom&amp;title=Module%3AChessboard"/>
	<link rel="alternate" type="text/html" href="https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;action=history"/>
	<updated>2026-04-29T16:50:27Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.39.3</generator>
	<entry>
		<id>https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=116075&amp;oldid=prev</id>
		<title>Indicwiki: 1 revision imported from :alpha:Module:Chessboard</title>
		<link rel="alternate" type="text/html" href="https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=116075&amp;oldid=prev"/>
		<updated>2023-03-24T03:19:00Z</updated>

		<summary type="html">&lt;p&gt;1 revision imported from &lt;a href=&quot;https://alpha.indicwiki.in/index.php?title=Module:Chessboard&quot; class=&quot;extiw&quot; title=&quot;alpha:Module:Chessboard&quot;&gt;alpha:Module:Chessboard&lt;/a&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en-GB&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 08:49, 24 March 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en-GB&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Indicwiki</name></author>
	</entry>
	<entry>
		<id>https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=32418&amp;oldid=prev</id>
		<title>Admin: 1 revision imported</title>
		<link rel="alternate" type="text/html" href="https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=32418&amp;oldid=prev"/>
		<updated>2022-12-07T16:45:42Z</updated>

		<summary type="html">&lt;p&gt;1 revision imported&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en-GB&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:15, 7 December 2022&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en-GB&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Admin</name></author>
	</entry>
	<entry>
		<id>https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=116074&amp;oldid=prev</id>
		<title>alpha&gt;Sarika: Created page with &quot;local p = {}  local cfg, nrows, ncols  local function innerboard(args, size, rev) 	pattern = cfg.pattern or '%w%w' 	local root = mw.html.create('div') 	root:addClass('chess-bo...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=116074&amp;oldid=prev"/>
		<updated>2022-12-07T06:07:51Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;local p = {}  local cfg, nrows, ncols  local function innerboard(args, size, rev) 	pattern = cfg.pattern or &amp;#039;%w%w&amp;#039; 	local root = mw.html.create(&amp;#039;div&amp;#039;) 	root:addClass(&amp;#039;chess-bo...&amp;quot;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en-GB&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 11:37, 7 December 2022&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en-GB&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>alpha&gt;Sarika</name></author>
	</entry>
	<entry>
		<id>https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=32417&amp;oldid=prev</id>
		<title>wikipedia&gt;Frietjes: Undid revision 1100998670 by Frietjes (talk) not needed</title>
		<link rel="alternate" type="text/html" href="https://www.vigyanwiki.in/index.php?title=Module:Chessboard&amp;diff=32417&amp;oldid=prev"/>
		<updated>2022-07-29T17:45:53Z</updated>

		<summary type="html">&lt;p&gt;Undid revision 1100998670 by &lt;a href=&quot;/wiki/Special:Contributions/Frietjes&quot; title=&quot;Special:Contributions/Frietjes&quot;&gt;Frietjes&lt;/a&gt; (&lt;a href=&quot;/index.php?title=User_talk:Frietjes&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;User talk:Frietjes (page does not exist)&quot;&gt;talk&lt;/a&gt;) not needed&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;local p = {}&lt;br /&gt;
&lt;br /&gt;
local cfg, nrows, ncols&lt;br /&gt;
&lt;br /&gt;
local function innerboard(args, size, rev)&lt;br /&gt;
	pattern = cfg.pattern or '%w%w'&lt;br /&gt;
	local root = mw.html.create('div')&lt;br /&gt;
	root:addClass('chess-board')&lt;br /&gt;
		:css('position', 'relative')&lt;br /&gt;
		:wikitext(cfg.image_board(size))&lt;br /&gt;
	&lt;br /&gt;
	for trow = 1,nrows do&lt;br /&gt;
		local row = rev and trow or ( 1 + nrows - trow )&lt;br /&gt;
		for tcol = 1,ncols do&lt;br /&gt;
			local col = rev and ( 1 + ncols - tcol ) or tcol&lt;br /&gt;
			local piece = args[ncols * ( nrows - row ) + col + 2] or ''&lt;br /&gt;
			if piece:match( pattern ) then&lt;br /&gt;
				local img = cfg.image_square(piece:match(pattern), row, col, size )&lt;br /&gt;
				root:tag('div')&lt;br /&gt;
					:css('position', 'absolute')&lt;br /&gt;
					:css('z-index', '3')&lt;br /&gt;
					:css('top', tostring(( trow - 1 ) * size) .. 'px')&lt;br /&gt;
					:css('left', tostring(( tcol - 1 ) * size) .. 'px')&lt;br /&gt;
					:css('width', size .. 'px')&lt;br /&gt;
					:css('height', size .. 'px')&lt;br /&gt;
					:wikitext(img)&lt;br /&gt;
			end&lt;br /&gt;
		end&lt;br /&gt;
	end&lt;br /&gt;
&lt;br /&gt;
	return tostring(root)&lt;br /&gt;
end&lt;br /&gt;
&lt;br /&gt;
function chessboard(args, size, rev, letters, numbers, header, footer, align, clear)&lt;br /&gt;
	function letters_row( rev, num_lt, num_rt )&lt;br /&gt;
		local letters = cfg.letters()&lt;br /&gt;
		local root = mw.html.create('')&lt;br /&gt;
		if num_lt then&lt;br /&gt;
			root:tag('td')&lt;br /&gt;
				:css('vertical-align', 'inherit')&lt;br /&gt;
				:css('padding', '0')&lt;br /&gt;
		end&lt;br /&gt;
		for k = 1,ncols do&lt;br /&gt;
			root:tag('td')&lt;br /&gt;
				:css('padding', '0')&lt;br /&gt;
				:css('vertical-align', 'inherit')&lt;br /&gt;
				:css('text-align', 'center')&lt;br /&gt;
				:css('height', '18px')&lt;br /&gt;
				:css('width', size .. 'px')&lt;br /&gt;
				:wikitext(rev and letters[1+ncols-k] or letters[k])&lt;br /&gt;
		end&lt;br /&gt;
		if num_rt then&lt;br /&gt;
			root:tag('td')&lt;br /&gt;
				:css('vertical-align', 'inherit')&lt;br /&gt;
				:css('padding', '0')&lt;br /&gt;
		end&lt;br /&gt;
		return tostring(root)&lt;br /&gt;
	end&lt;br /&gt;
	&lt;br /&gt;
	local letters_tp = letters:match( 'both' ) or letters:match( 'top' )&lt;br /&gt;
	local letters_bt = letters:match( 'both' ) or letters:match( 'bottom' )&lt;br /&gt;
	local numbers_lt = numbers:match( 'both' ) or numbers:match( 'left' )&lt;br /&gt;
	local numbers_rt = numbers:match( 'both' ) or numbers:match( 'right' )&lt;br /&gt;
	local width = ncols * size + 2&lt;br /&gt;
	if ( numbers_lt ) then width = width + 18 end&lt;br /&gt;
	if ( numbers_rt ) then width = width + 18 end&lt;br /&gt;
&lt;br /&gt;
	local root = mw.html.create('div')&lt;br /&gt;
		:addClass('thumb')&lt;br /&gt;
		:addClass('noviewer')&lt;br /&gt;
		:addClass(align)&lt;br /&gt;
	if( header and header ~= '' ) then&lt;br /&gt;
		root:tag('div'):addClass('center'):css('line-height', '130%'):css('margin', '0 auto'):css('max-width', (width + ncols) .. 'px'):wikitext(header)&lt;br /&gt;
	end&lt;br /&gt;
	local div = root:tag('div')&lt;br /&gt;
		:addClass('thumbinner')&lt;br /&gt;
		:css('width', width .. 'px')&lt;br /&gt;
	local b = div:tag('table')&lt;br /&gt;
		:attr('cellpadding', '0')&lt;br /&gt;
		:attr('cellspacing', '0')&lt;br /&gt;
		:css('background', 'white')&lt;br /&gt;
		:css('font-size', '88%')&lt;br /&gt;
		:css('border' , '1px #c8ccd1 solid')&lt;br /&gt;
		:css('padding', '0')&lt;br /&gt;
		:css('margin', 'auto')&lt;br /&gt;
&lt;br /&gt;
	if ( letters_tp ) then&lt;br /&gt;
		b:tag('tr')&lt;br /&gt;
			:css('vertical-align', 'middle')&lt;br /&gt;
			:wikitext(letters_row( rev, numbers_lt, numbers_rt ))&lt;br /&gt;
	end&lt;br /&gt;
	local tablerow = b:tag('tr'):css('vertical-align','middle')&lt;br /&gt;
	if ( numbers_lt ) then &lt;br /&gt;
		tablerow:tag('td')&lt;br /&gt;
			:css('padding', '0')&lt;br /&gt;
			:css('vertical-align', 'inherit')&lt;br /&gt;
			:css('text-align', 'center')&lt;br /&gt;
			:css('width', '18px')&lt;br /&gt;
			:css('height', size .. 'px')&lt;br /&gt;
			:wikitext(rev and 1 or nrows) &lt;br /&gt;
	end&lt;br /&gt;
	local td = tablerow:tag('td')&lt;br /&gt;
		:attr('colspan', ncols)&lt;br /&gt;
		:attr('rowspan', nrows)&lt;br /&gt;
		:css('padding', '0')&lt;br /&gt;
		:css('vertical-align', 'inherit')&lt;br /&gt;
		:wikitext(innerboard(args, size, rev))&lt;br /&gt;
	&lt;br /&gt;
	if ( numbers_rt ) then &lt;br /&gt;
		tablerow:tag('td')&lt;br /&gt;
			:css('padding', '0')&lt;br /&gt;
			:css('vertical-align', 'inherit')&lt;br /&gt;
			:css('text-align', 'center')&lt;br /&gt;
			:css('width', '18px')&lt;br /&gt;
			:css('height', size .. 'px')&lt;br /&gt;
			:wikitext(rev and 1 or nrows) &lt;br /&gt;
	end&lt;br /&gt;
	if ( numbers_lt or numbers_rt ) then&lt;br /&gt;
		for trow = 2, nrows do&lt;br /&gt;
			local idx = rev and trow or ( 1 + nrows - trow )&lt;br /&gt;
			tablerow = b:tag('tr')&lt;br /&gt;
				:css('vertical-align', 'middle')&lt;br /&gt;
			if ( numbers_lt ) then &lt;br /&gt;
				tablerow:tag('td')&lt;br /&gt;
					:css('padding', '0')&lt;br /&gt;
					:css('vertical-align', 'inherit')&lt;br /&gt;
					:css('text-align', 'center')&lt;br /&gt;
					:css('height', size .. 'px')&lt;br /&gt;
					:wikitext(idx)&lt;br /&gt;
			end&lt;br /&gt;
			if ( numbers_rt ) then &lt;br /&gt;
				tablerow:tag('td')&lt;br /&gt;
					:css('padding', '0')&lt;br /&gt;
					:css('vertical-align', 'inherit')&lt;br /&gt;
					:css('text-align', 'center')&lt;br /&gt;
					:css('height', size .. 'px')&lt;br /&gt;
					:wikitext(idx)&lt;br /&gt;
			end&lt;br /&gt;
		end&lt;br /&gt;
	end&lt;br /&gt;
	if ( letters_bt ) then&lt;br /&gt;
		b:tag('tr')&lt;br /&gt;
			:css('vertical-align', 'middle')&lt;br /&gt;
			:wikitext(letters_row( rev, numbers_lt, numbers_rt ))&lt;br /&gt;
	end&lt;br /&gt;
&lt;br /&gt;
	if (footer and footer ~= '') then&lt;br /&gt;
		div:tag('div')&lt;br /&gt;
			:addClass('thumbcaption')&lt;br /&gt;
			:wikitext(footer)&lt;br /&gt;
	end&lt;br /&gt;
&lt;br /&gt;
	return tostring(root)&lt;br /&gt;
end&lt;br /&gt;
&lt;br /&gt;
function convertFenToArgs( fen )&lt;br /&gt;
	-- converts FEN notation to 64 entry array of positions, offset by 2&lt;br /&gt;
	local res = { ' ', ' ' }&lt;br /&gt;
	-- Loop over rows, which are delimited by /&lt;br /&gt;
	for srow in string.gmatch( &amp;quot;/&amp;quot; .. fen, &amp;quot;/%w+&amp;quot; ) do&lt;br /&gt;
		-- Loop over all letters and numbers in the row&lt;br /&gt;
		for piece in srow:gmatch( &amp;quot;%w&amp;quot; ) do&lt;br /&gt;
			if piece:match( &amp;quot;%d&amp;quot; ) then -- if a digit&lt;br /&gt;
				for k=1,piece do&lt;br /&gt;
					table.insert(res,' ')&lt;br /&gt;
				end&lt;br /&gt;
			else -- not a digit&lt;br /&gt;
				local color = piece:match( '%u' ) and 'l' or 'd'&lt;br /&gt;
				piece = piece:lower()&lt;br /&gt;
				table.insert( res, piece .. color )&lt;br /&gt;
			end&lt;br /&gt;
		end&lt;br /&gt;
	end&lt;br /&gt;
&lt;br /&gt;
	return res&lt;br /&gt;
end&lt;br /&gt;
&lt;br /&gt;
function convertArgsToFen( args, offset )&lt;br /&gt;
	function nullOrWhitespace( s ) return not s or s:match( '^%s*(.-)%s*$' ) == '' end&lt;br /&gt;
	function piece( s ) &lt;br /&gt;
		return nullOrWhitespace( s ) and 1&lt;br /&gt;
		or s:gsub( '%s*(%a)(%a)%s*', function( a, b ) return b == 'l' and a:upper() or a end )&lt;br /&gt;
	end&lt;br /&gt;
	&lt;br /&gt;
	local res = ''&lt;br /&gt;
	offset = offset or 0&lt;br /&gt;
	for row = 1, 8 do&lt;br /&gt;
		for file = 1, 8 do&lt;br /&gt;
			res = res .. piece( args[8*(row - 1) + file + offset] )&lt;br /&gt;
		end&lt;br /&gt;
		if row &amp;lt; 8 then res = res .. '/' end&lt;br /&gt;
	end&lt;br /&gt;
	return mw.ustring.gsub(res, '1+', function( s ) return #s end )&lt;br /&gt;
end&lt;br /&gt;
&lt;br /&gt;
function p.board(frame)&lt;br /&gt;
	local args = frame.args&lt;br /&gt;
	local pargs = frame:getParent().args&lt;br /&gt;
	local style = args.style or pargs.style or 'Chess'&lt;br /&gt;
	cfg = require('Module:Chessboard/' .. style)&lt;br /&gt;
	nrows, ncols = cfg.dims()&lt;br /&gt;
	&lt;br /&gt;
	local size = args.size or pargs.size or '26'&lt;br /&gt;
	local reverse = ( args.reverse or pargs.reverse or '' ):lower() == &amp;quot;true&amp;quot;&lt;br /&gt;
	local letters = ( args.letters or pargs.letters or 'both' ):lower() &lt;br /&gt;
	local numbers = ( args.numbers or pargs.numbers or 'both' ):lower() &lt;br /&gt;
	local header = args[2] or pargs[2] or ''&lt;br /&gt;
	local footer = args[nrows*ncols + 3] or pargs[nrows*ncols + 3] or ''&lt;br /&gt;
	local align = ( args[1] or pargs[1] or 'tright' ):lower()&lt;br /&gt;
	local clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'&lt;br /&gt;
	local fen = args.fen or pargs.fen&lt;br /&gt;
		&lt;br /&gt;
	size = mw.ustring.match( size, '[%d]+' ) or '26' -- remove px from size&lt;br /&gt;
	if (fen) then&lt;br /&gt;
		align = args.align or pargs.align or 'tright'&lt;br /&gt;
		clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'&lt;br /&gt;
		header = args.header or pargs.header or ''&lt;br /&gt;
		footer = args.footer or pargs.footer or ''&lt;br /&gt;
		return chessboard( convertFenToArgs( fen ), size, reverse, letters, numbers, header, footer, align, clear )&lt;br /&gt;
	end&lt;br /&gt;
	if args[3] then&lt;br /&gt;
		return chessboard(args, size, reverse, letters, numbers, header, footer, align, clear)&lt;br /&gt;
	else&lt;br /&gt;
		return chessboard(pargs, size, reverse, letters, numbers, header, footer, align, clear)&lt;br /&gt;
	end&lt;br /&gt;
end&lt;br /&gt;
&lt;br /&gt;
function p.fen2ascii(frame)&lt;br /&gt;
	-- {{#invoke:Chessboard|fen2ascii|fen=...}}&lt;br /&gt;
	local b = convertFenToArgs( frame.args.fen )&lt;br /&gt;
	local res = '|=\n'&lt;br /&gt;
	local offset = 2&lt;br /&gt;
	for row = 1,8 do&lt;br /&gt;
		local n = (9 - row)&lt;br /&gt;
		res = res .. n .. ' |' .. &lt;br /&gt;
			table.concat(b, '|', 8*(row-1) + 1 + offset, 8*(row-1) + 8 + offset) .. '|=\n'&lt;br /&gt;
	end&lt;br /&gt;
	res = mw.ustring.gsub( res,'\| \|', '|  |' )&lt;br /&gt;
	res = mw.ustring.gsub( res,'\| \|', '|  |' )&lt;br /&gt;
	return res .. '   a  b  c  d  e  f  g  h'&lt;br /&gt;
end&lt;br /&gt;
&lt;br /&gt;
function p.ascii2fen( frame )&lt;br /&gt;
	-- {{#invoke:Chessboard|ascii2fen|kl| | |....}}&lt;br /&gt;
	return convertArgsToFen( frame.args, frame.args.offset or 1 )&lt;br /&gt;
end&lt;br /&gt;
&lt;br /&gt;
return p&lt;/div&gt;</summary>
		<author><name>wikipedia&gt;Frietjes</name></author>
	</entry>
</feed>