Difference between revisions of "Module:Chessboard/sandbox"

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blackwiki>Frietjes
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Line 1: Line 1:
 
local p = {}
 
local p = {}
  
function chessboard( position, size, reverse)
+
local function image_square( pc, row, col, size )
    local piecenames = { p = 'Pawn', r = 'Rook', n = 'Knight', b = 'Bishop', q = 'Queen', k = 'King' }
+
local colornames = { l = 'white', d = 'black' }
    local colornames = { l = 'White', d = 'Black' }
+
local piecenames = {  
 +
p = 'pawn',
 +
r = 'rook',
 +
n = 'knight',
 +
b = 'bishop',
 +
q = 'queen',
 +
k = 'king',
 +
a = 'archbishop',
 +
c = 'chancelor',
 +
z = 'champion',
 +
w = 'wizard',
 +
t = 'fool',
 +
h = 'upside-down pawn',
 +
m = 'upside-down rook',
 +
s = 'upside-down knight',
 +
f = 'upside-down king',
 +
e = 'upside-down bishop',
 +
g = 'upside-down queen',
 +
}
 +
local symnames = {
 +
xx = 'black cross',
 +
ox = 'white cross',
 +
xo = 'black circle',
 +
oo = 'white circle',
 +
ul = 'up-left arrow',
 +
ua = 'up arrow',
 +
ur = 'up-right arrow',
 +
la = 'left arrow',
 +
ra = 'right arrow',
 +
dl = 'down-left arrow',
 +
da = 'down arrow',
 +
dr = 'down-right arrow',
 +
lr = 'left-right arrow',
 +
ud = 'up-down arrow',
 +
x0 = 'zero',
 +
x1 = 'one',
 +
x2 = 'two',
 +
x3 = 'three',
 +
x4 = 'four',
 +
x5 = 'five',
 +
x6 = 'six',
 +
x7 = 'seven',
 +
x8 = 'eight',
 +
x9 = 'nine',
 +
}
 +
local colchar = {'a','b','c','d','e','f','g','h'}
 +
    local color = mw.ustring.gsub( pc, '^.*(%w)(%w).*$', '%2' ) or ''
 +
    local piece = mw.ustring.gsub( pc, '^.*(%w)(%w).*$', '%1' ) or ''
 +
    local alt = colchar[col] .. row .. ' '
 +
   
 +
    if colornames[color] and piecenames[piece] then
 +
alt = alt .. colornames[color] .. ' ' .. piecenames[piece]
 +
    else
 +
alt = alt .. ( symnames[piece .. color] or piece .. ' ' .. color )
 +
end
  
    function rowchar( row ) return 9 - row end
+
return string.format( '[[File:Chess %s%st45.svg|%dx%dpx|alt=%s|%s]]', piece, color, size, size, alt, alt )
    function filechar( file ) return ( "abcdefgh" ):sub( file, file ) end
+
 
function coord( ind ) return ( reverse and ( 8 - ind ) * size ) or ( ind - 1 ) * size end
+
end
 
      
 
      
    function piecediv( piece, row, file, res )
+
local function innerboard(args, size, rev)
        local color = mw.ustring.gsub(piece,'^.*(%w)(%w).*$', '%2')
+
local root = mw.html.create('div')
        piece = mw.ustring.gsub(piece,'^.*(%w)(%w).*$', '%1')
+
root:addClass('chess-board')
         local alt = string.format("%s%s %s %s", filechar( file ), rowchar( row ), colornames[color] or color, piecenames[piece] or piece)
+
:css('position', 'relative')
        local img = string.format('[[File:Chess %s%st45.svg|%dx%dpx|alt=%s|%s]]', piece, color, size, size, alt, alt)
+
:wikitext(string.format( '[[File:Chessboard480.svg|%dx%dpx|link=]]', 8 * size, 8 * size ))
        table.insert( res, string.format('<div style="position:absolute;z-index:3;top:%dpx;left:%dpx;">%s</div>', coord( row ), coord( file ), img) )
+
 +
    for trow = 1,8 do
 +
         local row = rev and trow or ( 9 - trow )
 +
        for tcol = 1,8 do
 +
            local col = rev and ( 9 - tcol ) or tcol
 +
            local piece = args[8 * ( 8 - row ) + col + 2] or ''
 +
            if piece:match( '%w%w' ) then
 +
              local img = image_square(piece:match('%w%w'), row, col, size )
 +
              root:tag('div')
 +
              :css('position', 'absolute')
 +
              :css('z-index', '3')
 +
              :css('top', tostring(( trow - 1 ) * size) .. 'px')
 +
              :css('left', tostring(( tcol - 1 ) * size) .. 'px')
 +
              :css('width', size .. 'px')
 +
              :css('height', size .. 'px')
 +
              :wikitext(img)
 +
            end
 +
        end
 
     end
 
     end
  
     local result = {}
+
     return tostring(root)
table.insert(result, string.format([=[
+
end
<div class="chess-board" style="position:relative;">
 
[[File:Chessboard480.png|%dx%dpx|link=]]
 
]=], size * 8, size * 8))
 
  
     for row = 1,8 do
+
function chessboard(args, size, rev, letters, numbers, header, footer, align, clear)
       for file = 1,8 do
+
     function letters_row( rev, num_lt, num_rt )
           local piece = position[8*(row-1) + file]
+
        local letters = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'}
           if piece
+
        local root = mw.html.create('')
           then
+
        if num_lt then
            if (piece:match("%a%w"))
+
        root:tag('td')
            then
+
        :css('vertical-align', 'inherit')
              piecediv( piece, row, file, result )
+
        :css('padding', '0')
            end
+
        end
 +
        for k = 1,8 do
 +
        root:tag('td')
 +
        :css('padding', '0')
 +
        :css('vartical-align', 'inherit')
 +
        :css('height', '18px')
 +
        :css('width', size .. 'px')
 +
        :wikitext(rev and letters[9-k] or letters[k])
 +
        end
 +
        if num_rt then
 +
        root:tag('td')
 +
        :css('vertical-align', 'inherit')
 +
        :css('padding', '0')
 +
        end
 +
        return tostring(root)
 +
    end
 +
   
 +
    local letters_tp = letters:match( 'both' ) or letters:match( 'top' )
 +
    local letters_bt = letters:match( 'both' ) or letters:match( 'bottom' )
 +
    local numbers_lt = numbers:match( 'both' ) or numbers:match( 'left' )
 +
    local numbers_rt = numbers:match( 'both' ) or numbers:match( 'right' )
 +
    local width = 8 * size + 2
 +
    if ( numbers_lt ) then width = width + 18 end
 +
    if ( numbers_rt ) then width = width + 18 end
 +
 
 +
    local root = mw.html.create('div')
 +
    :addClass('thumb')
 +
    :addClass(align)
 +
    :css('clear', clear)
 +
    :css('text-align', 'center')
 +
    :wikitext(header)
 +
    local div = root:tag('div')
 +
    :addClass('thumbinner')
 +
    :css('width', width .. 'px')
 +
    local b = div:tag('table')
 +
    :attr('cellpadding', '0')
 +
    :attr('cellspacing', '0')
 +
    :css('background', 'white')
 +
    :css('font-size', '88%')
 +
    :css('border' , '1px #b0b0b0 solid')
 +
    :css('padding', '0')
 +
    :css('margin', 'auto')
 +
 
 +
    if ( letters_tp ) then
 +
        b:tag('tr')
 +
        :css('vertical-align', 'middle')
 +
        :wikitext(letters_row( rev, numbers_lt, numbers_rt ))
 +
    end
 +
    local tablerow = b:tag('tr'):css('vertical-align','middle')
 +
    if ( numbers_lt ) then
 +
    tablerow:tag('td')
 +
    :css('padding', '0')
 +
    :css('vertical-align', 'inherit')
 +
    :css('width', '18px')
 +
    :css('height', size .. 'px')
 +
    :wikitext(rev and 1 or 8)
 +
    end
 +
    local td = tablerow:tag('td')
 +
    :attr('colspan', 8)
 +
    :attr('rowspan', 8)
 +
    :css('padding', '0')
 +
    :css('vertical-align', 'inherit')
 +
    :wikitext(innerboard(args, size, rev))
 +
 +
    if ( numbers_rt ) then
 +
    tablerow:tag('td')
 +
    :css('padding', '0')
 +
    :css('vertical-align', 'inherit')
 +
    :css('width', '18px')
 +
    :css('height', size .. 'px')
 +
    :wikitext(rev and 1 or 8)
 +
    end
 +
    if ( numbers_lt or numbers_rt ) then
 +
       for trow = 2, 8 do
 +
           local idx = rev and trow or ( 9 - trow )
 +
           tablerow = b:tag('tr')
 +
          :css('vertical-align', 'middle')
 +
           if ( numbers_lt ) then  
 +
          tablerow:tag('td')
 +
          :css('padding', '0')
 +
          :css('vertical-align', 'inherit')
 +
          :css('height', size .. 'px')
 +
          :wikitext(idx)
 +
          end
 +
          if ( numbers_rt ) then  
 +
          tablerow:tag('td')
 +
          :css('padding', '0')
 +
          :css('vertical-align', 'inherit')
 +
          :css('height', size .. 'px')
 +
          :wikitext(idx)
 
           end
 
           end
 
       end
 
       end
 
     end
 
     end
     table.insert(result, '</div>')
+
     if ( letters_bt ) then
     return result
+
        b:tag('tr')
 +
        :css('vertical-align', 'middle')
 +
        :wikitext(letters_row( rev, numbers_lt, numbers_rt ))
 +
    end
 +
 
 +
    if (footer and footer ~= '') then
 +
div:tag('div')
 +
:addClass('thumbcaption')
 +
:wikitext(footer)
 +
end
 +
 
 +
     return tostring(root)
 
end
 
end
  
function convertFenToPosition( fen )
+
function convertFenToArgs( fen )
     -- converts FEN notation to 64 entry array of positions
+
     -- converts FEN notation to 64 entry array of positions, offset by 2
     local res = {}
+
     local res = { ' ', ' ' }
 
     -- Loop over rows, which are delimited by /
 
     -- Loop over rows, which are delimited by /
     for srow in string.gmatch("/" .. fen, "/%w+") do
+
     for srow in string.gmatch( "/" .. fen, "/%w+" ) do
 
         -- Loop over all letters and numbers in the row
 
         -- Loop over all letters and numbers in the row
 
         for piece in srow:gmatch( "%w" ) do
 
         for piece in srow:gmatch( "%w" ) do
             if (piece:match("%d"))
+
             if piece:match( "%d" ) then -- if a digit
            then -- if a digit
+
                for k=1,piece do
              for k=1,piece do
+
                    table.insert(res,' ')
                table.insert(res,' ')
+
                end
              end
 
 
             else -- not a digit
 
             else -- not a digit
              local color = piece:match( '%u' ) and 'l' or 'd'
+
                local color = piece:match( '%u' ) and 'l' or 'd'
              piece = piece:lower()
+
                piece = piece:lower()
              table.insert(res, piece .. color )
+
                table.insert( res, piece .. color )
 
             end
 
             end
 
         end
 
         end
Line 62: Line 229:
 
end
 
end
  
function convertArgsToPosition( args, offset )
+
function convertArgsToFen( args, offset )
    -- copies args to 64 entry array of positions
 
    local res = {}
 
    -- Loop over rows, which are delimited by /
 
    for row = 1,8 do
 
      for file = 1,8 do
 
          table.insert(res, args[8*(row-1) + file + offset])
 
      end
 
    end
 
    return res
 
end
 
 
 
function convertPositionToFen( args, offset )
 
    -- converts
 
 
     function nullOrWhitespace( s ) return not s or s:match( '^%s*(.-)%s*$' ) == '' end
 
     function nullOrWhitespace( s ) return not s or s:match( '^%s*(.-)%s*$' ) == '' end
 
     function piece( s )  
 
     function piece( s )  
Line 96: Line 250:
 
     local args = frame.args
 
     local args = frame.args
 
     local pargs = frame:getParent().args
 
     local pargs = frame:getParent().args
     local size = (args.size or pargs.size) or '26px'
+
     local size = args.size or pargs.size or '26'
     local reverse = ( (args.reverse or pargs.reverse) or '' ):lower() == "true"
+
     local reverse = ( args.reverse or pargs.reverse or '' ):lower() == "true"
 +
    local letters = ( args.letters or pargs.letters or 'both' ):lower()
 +
    local numbers = ( args.numbers or pargs.numbers or 'both' ):lower()
 +
    local header = args[2] or pargs[2] or ''
 +
    local footer = args[67] or pargs[67] or ''
 +
    local align = ( args[1] or pargs[1] or 'tright' ):lower()
 +
    local clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'
 
     local fen = args.fen or pargs.fen
 
     local fen = args.fen or pargs.fen
    local offset = 0
+
       
    local position = {}
+
     size = mw.ustring.match( size, '[%d]+' ) or '26' -- remove px from size
 
+
     if (fen) then
     size = mw.ustring.gsub(size, '^[^%d]*(%d[%d]*)[^%d]*$', '%1') -- remove px from size
+
        align = args.align or pargs.align or 'tright'
   
+
        clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'
     if (fen)  
+
        header = args.header or pargs.header or ''
      then
+
        footer = args.footer or pargs.footer or ''
          position = convertFenToPosition( fen )
+
        return chessboard( convertFenToArgs( fen ), size, reverse, letters, numbers, header, footer, align, clear )
      else  
+
    end
          position = convertArgsToPosition( pargs, 2)
+
    if args[3] then
 +
        return chessboard(args, size, reverse, letters, numbers, header, footer, align, clear)
 +
    else
 +
        return chessboard(pargs, size, reverse, letters, numbers, header, footer, align, clear)
 
     end
 
     end
 
    return table.concat( chessboard(position, size, reverse), "\n")
 
 
end
 
end
  
 
function p.fen2ascii(frame)
 
function p.fen2ascii(frame)
     local b = convertFenToPosition( frame.args.fen )
+
    -- {{#invoke:Chessboard|fen2ascii|fen=...}}
     local res = ''
+
     local b = convertFenToArgs( frame.args.fen )
 +
     local res = '|=\n'
 +
    local offset = 2
 
     for row = 1,8 do
 
     for row = 1,8 do
         res = res .. '|' .. table.concat(b, '|', 8*(row-1) + 1, 8*(row-1) + 8) .. '|=\n'
+
        local n = (9 - row)
 +
         res = res .. n .. ' |' ..  
 +
            table.concat(b, '|', 8*(row-1) + 1 + offset, 8*(row-1) + 8 + offset) .. '|=\n'
 
     end
 
     end
     res = mw.ustring.gsub(res,'\| \|', '|  |')
+
     res = mw.ustring.gsub( res,'\| \|', '|  |' )
     res = mw.ustring.gsub(res,'\| \|', '|  |')
+
     res = mw.ustring.gsub( res,'\| \|', '|  |' )
 +
    res = res .. '  a  b  c  d  e  f  g  h'
 
     return res
 
     return res
 
end
 
end
  
function p.ascii2fen(frame)
+
function p.ascii2fen( frame )
     return diagramToFen( frame.args, frame.args.offset or 1 )
+
    -- {{#invoke:Chessboard|ascii2fen|kl| | |....}}
 +
     return convertArgsToFen( frame.args, frame.args.offset or 1 )
 
end
 
end
  
 
return p
 
return p

Latest revision as of 13:34, 26 September 2020

Documentation for this module may be created at Module:Chessboard/sandbox/doc

local p = {}

local function image_square( pc, row, col, size )
	local colornames = { l = 'white', d = 'black' }
	local piecenames = { 
		p = 'pawn',
		r = 'rook',
		n = 'knight',
		b = 'bishop',
		q = 'queen',
		k = 'king',
		a = 'archbishop',
		c = 'chancelor',
		z = 'champion',
		w = 'wizard',
		t = 'fool',
		h = 'upside-down pawn',
		m = 'upside-down rook',
		s = 'upside-down knight',
		f = 'upside-down king',
		e = 'upside-down bishop',
		g = 'upside-down queen',
	}
	local symnames = {
		xx = 'black cross',
		ox = 'white cross',
		xo = 'black circle',
		oo = 'white circle',
		ul = 'up-left arrow',
		ua = 'up arrow',
		ur = 'up-right arrow',
		la = 'left arrow',
		ra = 'right arrow',
		dl = 'down-left arrow',
		da = 'down arrow',
		dr = 'down-right arrow',
		lr = 'left-right arrow',
		ud = 'up-down arrow',
		x0 = 'zero',
		x1 = 'one',
		x2 = 'two',
		x3 = 'three',
		x4 = 'four',
		x5 = 'five',
		x6 = 'six',
		x7 = 'seven',
		x8 = 'eight',
		x9 = 'nine',
	}
	local colchar = {'a','b','c','d','e','f','g','h'}
    local color = mw.ustring.gsub( pc, '^.*(%w)(%w).*$', '%2' ) or ''
    local piece = mw.ustring.gsub( pc, '^.*(%w)(%w).*$', '%1' ) or ''
    local alt = colchar[col] .. row .. ' '
    
    if colornames[color] and piecenames[piece] then
		alt = alt .. colornames[color] .. ' ' .. piecenames[piece]
    else
		alt = alt .. ( symnames[piece .. color] or piece .. ' ' .. color )
	end

	return string.format( '[[File:Chess %s%st45.svg|%dx%dpx|alt=%s|%s]]', piece, color, size, size, alt, alt )

end
    
local function innerboard(args, size, rev)
	local root = mw.html.create('div')
	root:addClass('chess-board')
		:css('position', 'relative')
		:wikitext(string.format( '[[File:Chessboard480.svg|%dx%dpx|link=]]', 8 * size, 8 * size ))
	
    for trow = 1,8 do
        local row = rev and trow or ( 9 - trow )
        for tcol = 1,8 do
            local col = rev and ( 9 - tcol ) or tcol
            local piece = args[8 * ( 8 - row ) + col + 2] or ''
            if piece:match( '%w%w' ) then
               local img = image_square(piece:match('%w%w'), row, col, size )
               root:tag('div')
               		:css('position', 'absolute')
               		:css('z-index', '3')
               		:css('top', tostring(( trow - 1 ) * size) .. 'px')
               		:css('left', tostring(( tcol - 1 ) * size) .. 'px')
               		:css('width', size .. 'px')
               		:css('height', size .. 'px')
               		:wikitext(img)
            end
        end
    end

    return tostring(root)
end

function chessboard(args, size, rev, letters, numbers, header, footer, align, clear)
    function letters_row( rev, num_lt, num_rt )
        local letters = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'}
        local root = mw.html.create('')
        if num_lt then
        	root:tag('td')
        		:css('vertical-align', 'inherit')
        		:css('padding', '0')
        end
        for k = 1,8 do
        	root:tag('td')
        		:css('padding', '0')
        		:css('vartical-align', 'inherit')
        		:css('height', '18px')
        		:css('width', size .. 'px')
        		:wikitext(rev and letters[9-k] or letters[k])
        end
        if num_rt then
        	root:tag('td')
        		:css('vertical-align', 'inherit')
        		:css('padding', '0')
        end
        return tostring(root)
    end
    
    local letters_tp = letters:match( 'both' ) or letters:match( 'top' )
    local letters_bt = letters:match( 'both' ) or letters:match( 'bottom' )
    local numbers_lt = numbers:match( 'both' ) or numbers:match( 'left' )
    local numbers_rt = numbers:match( 'both' ) or numbers:match( 'right' )
    local width = 8 * size + 2
    if ( numbers_lt ) then width = width + 18 end
    if ( numbers_rt ) then width = width + 18 end

    local root = mw.html.create('div')
    	:addClass('thumb')
    	:addClass(align)
    	:css('clear', clear)
    	:css('text-align', 'center')
    	:wikitext(header)
    local div = root:tag('div')
    	:addClass('thumbinner')
    	:css('width', width .. 'px')
    local b = div:tag('table')
    	:attr('cellpadding', '0')
    	:attr('cellspacing', '0')
    	:css('background', 'white')
    	:css('font-size', '88%')
    	:css('border' , '1px #b0b0b0 solid')
    	:css('padding', '0')
    	:css('margin', 'auto')

    if ( letters_tp ) then
        b:tag('tr')
        	:css('vertical-align', 'middle')
        	:wikitext(letters_row( rev, numbers_lt, numbers_rt ))
    end
    local tablerow = b:tag('tr'):css('vertical-align','middle')
    if ( numbers_lt ) then 
    	tablerow:tag('td')
    		:css('padding', '0')
    		:css('vertical-align', 'inherit')
    		:css('width', '18px')
    		:css('height', size .. 'px')
    		:wikitext(rev and 1 or 8) 
    end
    local td = tablerow:tag('td')
    	:attr('colspan', 8)
    	:attr('rowspan', 8)
    	:css('padding', '0')
    	:css('vertical-align', 'inherit')
    	:wikitext(innerboard(args, size, rev))
	
    if ( numbers_rt ) then 
    	tablerow:tag('td')
    		:css('padding', '0')
    		:css('vertical-align', 'inherit')
    		:css('width', '18px')
    		:css('height', size .. 'px')
    		:wikitext(rev and 1 or 8) 
    end
    if ( numbers_lt or numbers_rt ) then
       for trow = 2, 8 do
          local idx = rev and trow or ( 9 - trow )
          tablerow = b:tag('tr')
          	:css('vertical-align', 'middle')
          if ( numbers_lt ) then 
          	tablerow:tag('td')
          		:css('padding', '0')
          		:css('vertical-align', 'inherit')
          		:css('height', size .. 'px')
          		:wikitext(idx)
          end
          if ( numbers_rt ) then 
          	tablerow:tag('td')
          		:css('padding', '0')
          		:css('vertical-align', 'inherit')
          		:css('height', size .. 'px')
          		:wikitext(idx)
          end
       end
    end
    if ( letters_bt ) then
        b:tag('tr')
        	:css('vertical-align', 'middle')
        	:wikitext(letters_row( rev, numbers_lt, numbers_rt ))
    end

    if (footer and footer ~= '') then
		div:tag('div')
			:addClass('thumbcaption')
			:wikitext(footer)
	end

    return tostring(root)
end

function convertFenToArgs( fen )
    -- converts FEN notation to 64 entry array of positions, offset by 2
    local res = { ' ', ' ' }
    -- Loop over rows, which are delimited by /
    for srow in string.gmatch( "/" .. fen, "/%w+" ) do
        -- Loop over all letters and numbers in the row
        for piece in srow:gmatch( "%w" ) do
            if piece:match( "%d" ) then -- if a digit
                for k=1,piece do
                    table.insert(res,' ')
                end
            else -- not a digit
                local color = piece:match( '%u' ) and 'l' or 'd'
                piece = piece:lower()
                table.insert( res, piece .. color )
            end
        end
    end

    return res
end

function convertArgsToFen( args, offset )
    function nullOrWhitespace( s ) return not s or s:match( '^%s*(.-)%s*$' ) == '' end
    function piece( s ) 
        return nullOrWhitespace( s ) and 1
        or s:gsub( '%s*(%a)(%a)%s*', function( a, b ) return b == 'l' and a:upper() or a end )
    end
    
    local res = ''
    offset = offset or 0
    for row = 1, 8 do
        for file = 1, 8 do
            res = res .. piece( args[8*(row - 1) + file + offset] )
        end
        if row < 8 then res = res .. '/' end
    end
    return mw.ustring.gsub(res, '1+', function( s ) return #s end )
end

function p.board(frame)
    local args = frame.args
    local pargs = frame:getParent().args
    local size = args.size or pargs.size or '26'
    local reverse = ( args.reverse or pargs.reverse or '' ):lower() == "true"
    local letters = ( args.letters or pargs.letters or 'both' ):lower() 
    local numbers = ( args.numbers or pargs.numbers or 'both' ):lower() 
    local header = args[2] or pargs[2] or ''
    local footer = args[67] or pargs[67] or ''
    local align = ( args[1] or pargs[1] or 'tright' ):lower()
    local clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'
    local fen = args.fen or pargs.fen
        
    size = mw.ustring.match( size, '[%d]+' ) or '26' -- remove px from size
    if (fen) then
        align = args.align or pargs.align or 'tright'
        clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'
        header = args.header or pargs.header or ''
        footer = args.footer or pargs.footer or ''
        return chessboard( convertFenToArgs( fen ), size, reverse, letters, numbers, header, footer, align, clear )
    end
    if args[3] then
        return chessboard(args, size, reverse, letters, numbers, header, footer, align, clear)
    else
        return chessboard(pargs, size, reverse, letters, numbers, header, footer, align, clear)
    end
end

function p.fen2ascii(frame)
    -- {{#invoke:Chessboard|fen2ascii|fen=...}}
    local b = convertFenToArgs( frame.args.fen )
    local res = '|=\n'
    local offset = 2
    for row = 1,8 do
        local n = (9 - row)
        res = res .. n .. ' |' .. 
            table.concat(b, '|', 8*(row-1) + 1 + offset, 8*(row-1) + 8 + offset) .. '|=\n'
    end
    res = mw.ustring.gsub( res,'\| \|', '|  |' )
    res = mw.ustring.gsub( res,'\| \|', '|  |' )
    res = res .. '   a  b  c  d  e  f  g  h'
    return res
end

function p.ascii2fen( frame )
    -- {{#invoke:Chessboard|ascii2fen|kl| | |....}}
    return convertArgsToFen( frame.args, frame.args.offset or 1 )
end

return p