\writestatus{loading}{Go/WeiQi/Baduk Lua module}





\startluacode



Game = [[

(;CA[Windows-1252]SZ[19]AP[MultiGo:4.4.4]EV[14th ch-kr Tengen, game 1]DT[2010-07-11]

PB[Chen Yaoye]BR[9p]PW[Park Junghwan]WR[8p]KM[6.5]RE[B+R]

;B[pd];W[dd];B[qp];W[dq];B[co];W[oq];B[mp];W[qf];B[pi];W[md];B[qe];W[pf];B[oe];W[pe]

;B[qd];W[od];B[of];W[og];B[nd];W[oc];B[nc];W[pc];B[rf];W[rg];B[ng];W[qc];B[rc];W[sf]

;B[rd];W[rb];B[ob];W[qb];B[pg];W[re];B[oh];W[oo];B[qn];W[pn];B[pm];W[om];B[pl];W[kp]

;B[mn];W[pp];B[ep];W[qq];B[qo];W[eq];B[fp];W[gq];B[gp];W[hq];B[hp];W[rq];B[iq];W[ir]

;B[jr];W[ip];B[jq];W[cq];B[nr];W[or];B[cf];W[di];B[ef];W[fc];B[dk];W[fi];B[gf];W[ek]

;B[el];W[dl];B[cl];W[dm];B[ck];W[fk];B[em];W[id];B[eh];W[ei];B[cc];W[cd];B[bd];W[dc]

;B[bb];W[cb];B[bc];W[mc];B[mb];W[ne];B[nb];W[kc];B[me];W[en];B[dn];W[ri];B[hk];W[hi]

;B[jd];W[ic];B[gd];W[gc];B[jk];W[fl];B[cm];W[ji];B[kd];W[le];B[jc];W[jf];B[mf];W[jb]

;B[kb];W[ib];B[np];W[ol];B[po];W[op];B[on];W[nn];B[no];W[pn];B[qg];W[rf];B[on];W[ce]

;B[be];W[pn];B[gh];W[fh];B[fg];W[hh];B[on];W[cg];B[bf];W[pn];B[bp];W[is];B[on];W[jp]

;B[lq];W[pn];B[br];W[cr];B[on];W[il];B[nm];W[jl];B[kl];W[kk];B[km];W[lk];B[hl];W[hm]

;B[jj];W[dg];B[df];W[kj];B[gm];W[kn];B[hn];W[jm];B[lm];W[ik];B[jn])

]]





EMPTY = 0

BLACK = 1

WHITE = 2

ONSTACK = 4

DEAD = 5



Status = {FirstMove = 1, LastMove = 999, FirstMoveLabel = 1, LastMoveLabel = 999} 



function displayMove (num)

	if num < Status.FirstMove or num > Status.LastMove then return false else return true end

end 





function writeLabel (num)

	if num < Status.FirstMoveLabel or num > Status.LastMoveLabel then return false else return true end

end





function setLabelBoundaries (start, stop)

	Status.FirstMoveLabel = start

	Status.LastMoveLabel = stop

end





function setMoveBoundaries (start, stop)

	Status.FirstMove = start

	Status.LastMove = stop

end



Board = { Size = 19, LastColor = WHITE, MoveNumber = 0, Label = {}; {}}



Big = { Board = 15, Grid = 0.7, Stone = 14.5, Label = 0.9 }		--> Big sized goban 

Medium = { Board = 12, Grid = 0.5, Stone = 11.5, Label = 0.7 }	--> Medium sized goban

Small = { Board = 10, Grid = 0.4, Stone = 9.5, Label = 0.55 }	 	--> Small sized goban



Unit = Big



Hoshi19 = {{x=4, y=4}, {x=4, y=10}, {x=4, y=16}, {x=10, y=4}, {x=10, y=10}, {x=10, y=16}, {x=16, y=4}, {x=16, y=10},{x=16, y=16}}

Hoshi13 = {{x=4, y=4}, {x=4, y=10}, {x=10, y=4}, {x=10, y=10}, {x=7, y=7}}

Hoshi9 = {{x=3, y=3}, {x=3, y=7}, {x=7, y=3}, {x=7, y=7}, {x=5, y=5}}



Hoshi = Hoshi19



---------------------------------------------------------

--- TeX (MetaPost) drawing functions

---------------------------------------------------------



function stone (x, y, c)	--> x, y: number; c: string (color: white or black)

	tex.sprint("fill fullcircle scaled " .. Unit.Stone .. " shifted (" .. x*Unit.Board .. "," .. y*-Unit.Board .. ") withcolor " .. c .. " ;")

	tex.sprint("draw fullcircle scaled " .. Unit.Stone .. " shifted (" .. x*Unit.Board .. "," .. y*-Unit.Board .. ") withcolor black ;")

end





function circleMarker (x, y, c)

	tex.sprint("draw fullcircle scaled " .. 0.6*Unit.Stone .. " shifted (" .. x*Unit.Board .. "," .. y*-Unit.Board .. ") withpen pencircle scaled (" .. 2*Unit.Grid .. ") withcolor " .. c .. " ;")

end





function label (l, x, y, c)

	tex.sprint("label(textext(\"\\color[" .. c .. "]{\\bf\\ssxx " .. l .. "}\"),(" .. x*Unit.Board .. ',' .. y*-Unit.Board .. '))  ;')

end





function drawGoban ()

	for i=1, Board.Size do

		tex.sprint("draw (" .. Unit.Board .. "," .. i*-Unit.Board .. ") -- (" .. Board.Size*Unit.Board .. "," .. i*-Unit.Board .. ") withpen pencircle scaled " .. Unit.Grid .. " ;")

		tex.sprint("draw (" .. i*Unit.Board .. "," .. -Unit.Board .. ") -- (" .. i*Unit.Board .. "," .. Board.Size*-Unit.Board .. ") withpen pencircle scaled " .. Unit.Grid .. " ;")

	end



	tex.sprint("draw (" .. Unit.Board .. "," .. -Unit.Board .. ") -- (" .. Board.Size*Unit.Board .. "," .. -Unit.Board ..") -- (" .. Board.Size*Unit.Board .. "," .. Board.Size*-Unit.Board .. ") -- (" .. Unit.Board .. "," .. Board.Size*-Unit.Board .. ") -- cycle withpen pencircle scaled (" ..2.5*Unit.Grid .. ") ;")



	for i=1, #Hoshi do

		x = Hoshi[i].x; y = Hoshi[i].y

		tex.sprint("drawdot (" .. x*Unit.Board .. "," .. y*-Unit.Board .. ") withpen pencircle scaled (" .. 5*Unit.Grid .. ") ;")

	end

end





function drawStones ()

	for i=1, Board.Size do

		for j=1, Board.Size do

			if Board[i][j] == BLACK then stone(i, j, "black") elseif Board[i][j] == WHITE then stone(i, j, "white") end

			if Board.Label[i][j] > 0 then

				if Board[i][j] == BLACK then

					label(Board.Label[i][j], i, j, "white")

				elseif Board[i][j] == WHITE then

					label(Board.Label[i][j], i, j, "black")

				end

			elseif Board.Label[i][j] < 0 then

				if Board[i][j] == BLACK then circleMarker(i, j, "white") else circleMarker(i, j, "black") end

			end

		end

	end

end





function displayBoard (name, size, p1, p2)



	if size == "small" then

		Unit = Small

	elseif size == "medium" then

		Unit = Medium

	else

		Unit = Big

	end



	tex.sprint("\\startuseMPgraphic{" .. name .. "}{}")

	tex.sprint("path p ;")



	drawGoban()

	drawStones()



	if p1 then

		local x1, y1 = Point(p1)

		local x2, y2 = Point(p2)

		tex.sprint("p:= (" .. (x1-1)*Unit.Board .. "," .. (y1-1)*-Unit.Board ..") -- (" .. x2*Unit.Board .. "," .. (y1-1)*-Unit.Board .. ") -- (" .. x2*Unit.Board .. "," .. y2*-Unit.Board .. ") -- (" .. (x1-1)*Unit.Board .. "," .. y2*-Unit.Board .. ") -- cycle ;")

		tex.sprint("clip currentpicture to p shifted (" .. Unit.Board/2 .. "," .. -Unit.Board/2 .. ") ;")

	end



	tex.sprint("\\stopuseMPgraphic")

	tex.sprint("\\useMPgraphic{" .. name .. "}")

end





function setStone (p, c)		--> c = "black", "white" or "empty" (AB, AW, AE)

	local x, y = Point(p)

	if c == "black" then

		Board[x][y] = BLACK 

	elseif c == "white" then

		Board[x][y] = WHITE

	elseif c == "empty" then

		Board[x][y] = EMPTY

	end

end





function Point (p)

	local x, y = 0, 0

	local l = "abcdefghijklmnopqrstuvwxyz"

	x = string.find(l, string.sub(p, 1, 1))

	y = string.find(l, string.sub(p, 2, 2))

	return x, y

end





function setMarker (p)

	local x, y = Point(p)

	if Board[x][y] > 0 then Board.Label[x][y] = -1 end

end





function playMove (p, c)		--> if p not defined -> pass

	Board.MoveNumber = Board.MoveNumber + 1	

	if displayMove(Board.MoveNumber) then

		if c then

			if c == "white" then Board.LastColor = WHITE else Board.LastColor = BLACK end

		else

			if Board.LastColor == BLACK then Board.LastColor = WHITE else Board.LastColor = BLACK end

		end

		if p then

			local x, y = Point(p)

			Board[x][y] = Board.LastColor

			if writeLabel(Board.MoveNumber) then 

				Board.Label[x][y] = Board.MoveNumber

			else

				testDeadStones(x, y)	--> only test dead stones if you dont write label

			end

-- here should be test for suicide move, allowed on some rules version 

		end	

	end

end





function setBoardSize (s)

	if s == "small" then

		Board.Size = 9

		Hoshi = Hoshi9

	elseif s == "medium" then

		Board.Size = 13

		Hoshi=Hoshi13

	else

		Board.Size = 19

		Hoshi = Hoshi19

	end

	setLabelBoundaries(1, 999)

end





function resetBoard ()

	Board.LastColor = WHITE

	Board.MoveNumber = 0

	for i=1, Board.Size do

		Board[i] = {}

		Board.Label[i] = {}

		for j=1, Board.Size do

			Board[i][j] = EMPTY 

			Board.Label[i][j] = EMPTY

		end

	end

end





---------------------------------------------------------

--- Deadstone calculator

---------------------------------------------------------



--- Stack implementation for deadstone calculator



function resetStack ()

	stack = {}

end





function push (x, y)

	stack = {next = stack, x = x, y = y}

end





function pop ()

	if stack then

		local x, y = stack.x, stack.y

		stack = stack.next

		return x, y

	end

end





--- Deadstone calculator



--- Are x, y valid coordinates? 



function isValid (x, y)

	if x >= 1 and x <= Board.Size and y >= 1 and y <= Board.Size then return true end

	return false

end



--- Reset shadow Goban



shadowboard = {}



function resetShadowBoard (size)

	for i = 1, size do

		shadowboard[i] = {}

	end

end



--- Na základě stínového gobanu odstraní kameny označené jako mrtvé ze skutečného gobanu.



function removeDeadStones ()

	for i, k in pairs(shadowboard) do

		for j, v in pairs(k) do Board[i][j] = EMPTY end

	end

end



--- Test, je-li x, y prázdná.

-- V opačném případě je-li na x, y soupeřův kámen, uloží do zásobníku jeho pozici.



function isEmpty (x, y)

	if Board[x][y] == EMPTY then

		return true

	elseif Board[x][y] ~= myColor and shadowboard[x][y] ~= DEAD then

		push(x, y)

	end

	return false

end



--- Testuje, zda má kámen na pozici x, y svobodu.

-- V případě že ne, vrací true, jinak false.



function isDead (x, y)

	if isValid(x, y+1) and isEmpty(x, y+1) then return false end

	if isValid(x-1, y) and isEmpty(x-1, y) then return false end

	if isValid(x, y-1) and isEmpty(x, y-1) then return false end

	if isValid(x+1, y) and isEmpty(x+1, y) then return false end

	return true

end



--- Test for dead group.

-- If the group with stone on (x, y) is dead, it removes it from goban. 

-- Can be used to test for suicide.



function deadStones (x, y)

	resetStack()

	resetShadowBoard(Board.Size)

	while isDead(x, y) do

		shadowboard [x][y] = DEAD

		x, y = pop()

		if not x then

			removeDeadStones()

			break

		end

	end

end



--- Main entry point for deadstone calculator.

-- For each neighbour stone it starts test for dead group.



function testDeadStones (x, y)

	myColor = Board[x][y]

	if isValid(x+1, y) and Board[x+1][y] ~= EMPTY and Board[x+1][y] ~= myColor then deadStones(x+1, y) end

	if isValid(x, y+1) and Board[x][y+1] ~= EMPTY and Board[x][y+1] ~= myColor then deadStones(x, y+1) end

	if isValid(x-1, y) and Board[x-1][y] ~= EMPTY and Board[x-1][y] ~= myColor then deadStones(x-1, y) end

	if isValid(x, y-1) and Board[x][y-1] ~= EMPTY and Board[x][y-1] ~= myColor then deadStones(x, y-1) end

end





---------------------------------------------------------

--- SGF parser

---------------------------------------------------------



--- Very ugly looking first implementation of SGF parser mainly for testing deadstone calculator





function blackmove (a, b, c)

	playMove(c, "black")

	return b

end





function whitemove (a, b, c)

	playMove(c, "white")

	return b

end





function blackstone (a, b, c)

	print("\\stone[black]{"..c.."}")

	return b

end





function whitestone (a, b, c)

	print("\\stone[white]{"..c.."}")

	return b

end





function emptystone (a, b, c)

	print("\\stone[empty]{"..c.."}")

	return b

end





function parseSGF(SGFstring)

	emptychar = (lpeg.S(" \t\r\n"))^1

	letter = lpeg.R("az", "AZ")

	number = (lpeg.R("09"))^1

	text = (letter + number + lpeg.S(" .,:;+-=_?!@#$%^&*()/"))^1



	axis = letter * letter

	shortparam = axis + ""

	longparam = axis * ( ":" * axis )^-1



	FF = lpeg.P("FF[4]") * emptychar^0

	GM = lpeg.P("GM[1]") * emptychar^0

	SZ = lpeg.P("SZ[") * number * lpeg.P("]") * emptychar^0

	DT = lpeg.P("DT[") * text * lpeg.P("]") * emptychar^0

	EV = lpeg.P("EV[") * text * lpeg.P("]") * emptychar^0

	PB = lpeg.P("PB[") * text * lpeg.P("]") * emptychar^0

	PW = lpeg.P("PW[") * text * lpeg.P("]") * emptychar^0

	BR = lpeg.P("BR[") * text * lpeg.P("]") * emptychar^0

	WR = lpeg.P("WR[") * text * lpeg.P("]") * emptychar^0

	KM = lpeg.P("KM[") * text * lpeg.P("]") * emptychar^0

	RE = lpeg.P("RE[") * text * lpeg.P("]") * emptychar^0

	CA = lpeg.P("CA[") * text * lpeg.P("]") * emptychar^0

	AP = lpeg.P("AP[") * text * lpeg.P("]") * emptychar^0

	DT = lpeg.P("DT[") * text * lpeg.P("]") * emptychar^0







	B = lpeg.P("B[") * lpeg.Cmt(shortparam, blackmove) * lpeg.P("]")	* emptychar^0

	W = lpeg.P("W[") * lpeg.Cmt(shortparam, whitemove) * lpeg.P("]") * emptychar^0



	rootproperty = FF + GM + SZ + DT + EV + PB + PW + BR + WR + KM + RE + CA + AP + DT

	property = B + W



	rootnode = lpeg.P(";") * (rootproperty)^1

	node = lpeg.P(";") * property



	sequence = rootnode^0 * node^1



	gameTree = lpeg.P("(") * sequence^1 * lpeg.P(")")



--	tex.sprint("SGFparse: " .. SGFstring)

--	tex.sprint("::")

--	tex.sprint()



	resetBoard ()

	if not lpeg.match(gameTree, SGFstring) then

		tex.sprint("Invalid SGF file")

	end



end





\stopluacode



\def\move#1%

	{\ctxlua{playMove("#1")}}



%\def\move

%	{\dosingleargument\domove}



%\def\domove[#1]{#2}

%	{\iffirstargument

%		\ctxlua{playMove("#2", "#1")}

%	\else

%		\ctxlua{playMove("#2")}

%	\fi}



\def\pass

	{\ctxlua{playMove()}}



\def\stone[#1]#2%

	{\ctxlua{setStone("#2", "#1")}}



\def\marker#1%

	{\ctxlua{setMarker("#1")}}



\def\newboard

	{\dosingleargument\donewboard}



\def\donewboard[#1]%

	{\iffirstargument

		\ctxlua{setBoardSize("#1")}

	\else

		\ctxlua{setBoardSize("big")}

	\fi}



\def\resetnumbering

	{\ctxlua{resetBoard()}}



\def\drawboard

	{\dosingleargument\dodrawboard}



\def\dodrawboard[#1]%

	{\iffirstargument

		\ctxlua{displayBoard(0, "#1")}

	\else

		\ctxlua{displayBoard(0, "medium")}

	\fi}



\def\drawpartialboard#1#2%

	{\ctxlua{displayBoard(0, "medium", "#1", "#2")}}



\def\parse#1%

	{\ctxlua{parseSGF("#1")}}



\def\position

	{\dosingleargument\doposition}



\def\doposition[#1]%

	{\iffirstargument

		\ctxlua{setMoveBoundaries(1, #1); parseSGF(Game)}

	\else

		{\ctxlua{parseSGF(Game)}}

	\fi}



\def\labels#1#2%

	{\ctxlua{setLabelBoundaries(#1, #2)}}





\starttext





\newboard



\position[40]

\drawboard



\labels{41}{999}

\position[100]

\drawboard[small]



\labels{101}{999}

\position[999]

\drawboard[big]



\labels{999}{999}

\position{999}

\drawboard



The annual bilateral Tengen championship is back. This year, Park Junghwan Chunwon (Korean for Tengen) meet Chen Yaoye Tianyuan (Chinese for Tengen). This tournament is sponsored by Sports Korea newspaper and Xinmin Wanbo evening paper.



Chen Yaoye of China opened the first game by an early 165 moves resignation game. Chen who played black in the first game ended the game by cutting Park's group. The cut will lead to a favorable ko fight for black. I'm not sure whether white group can survive here or not, but perhaps Park didn't think he'll win the fight, so he resigned.



% \newboard

% \parse{;B[pd];W[dd];B[pq];W[dp];B[fq];W[cn];B[qk];W[jp];B[dr];W[gq];B[fp];W[fr];B[er];W[gr]

% ;B[cp];W[cq];B[bq];W[bp];B[co];W[bo];B[do];W[br];B[dq];W[cr];B[dn];W[mq];B[cm];W[bn]

% ;B[po];W[dm];B[nc];W[fc];B[be];W[ce];B[bd];W[bf];B[cf];W[cg];B[df];W[bg];B[dg];W[dh]

% ;B[eh];W[di];B[dc];W[cc];B[cb];W[cd];B[bc];W[db];B[ec];W[ed];B[eb];W[eg];B[ef];W[fe]

% ;B[gd];W[fd];B[da];W[fg]}

% \drawboard

% \clearnumbers

% \parse{;B[em];W[dl];B[qe];W[fm];B[fn];W[el];B[gm];W[en]}

% \drawboard

% \clearnumbers

% \parse{;B[eo];W[ok]

% ;B[oj];W[nj];B[pj];W[nk];B[ni];W[mi];B[mh];W[li];B[pm];W[qc];B[em]}

% \drawboard

% \clearnumbers

% \parse{;W[re];B[rd];W[qd]

% ;B[rc];W[nh];B[oi];W[pe];B[qf];W[pc];B[od];W[rf];B[rb];W[qg];B[pf];W[of];B[pg];W[ph]

% ;B[og];W[oh];B[oe]}

% \drawboard

% \clearnumbers

% \parse{;W[qi];B[ng];W[rk];B[rl];W[rj];B[ql];W[rh];B[fl];W[jd]}

% \drawboard

% \clearnumbers

% \parse{;B[lh];W[kh]

% ;B[lf];W[ki];B[jf];W[he];B[kc];W[kd];B[jc];W[ic];B[ib];W[le];B[kg];W[lc];B[lb];W[kb]

% ;B[jb];W[mb];B[ka];W[mc];B[ob];W[ig]}

% \drawboard

% \clearnumbers

% \parse{;B[ej];W[dj];B[fk];W[ek];B[lr];W[mr];B[iq];W[ip]

% ;B[hp];W[jq];B[hq];W[jr];B[mo];W[or];B[pr];W[lp];B[ir];W[jg];B[me];W[fb];B[hb];W[fa]

% ;B[ba];W[is];B[hs];W[js];B[gp];W[sl];B[sm];W[sk];B[rn];W[ps];B[qs];W[os];B[qr];W[if]

% ;B[gi];W[md];B[mf];W[hj];B[ei];W[nm];B[jl];W[hl];B[lm];W[kl]}

% \drawboard

% \clearnumbers

% \parse{;B[km];W[jm];B[kk];W[ll]

% ;B[ml];W[lk];B[mk];W[lj];B[mm];W[mj];B[mp];W[lo];B[nq];W[mn];B[nn];W[ln];B[lq];W[ls]

% ;B[nr];W[ms];B[jn];W[im];B[cl];W[dk];B[ns];W[no];B[ks];W[on];B[kp];W[ko];B[in];W[hm]

% ;B[hn];W[kn]}

% \drawboard

% \clearnumbers

% \parse{;B[hi];W[pn];B[qn];W[op];B[oq];W[pp];B[qp];W[ii]}

% \drawboard

% \clearnumbers

% \parse{;B[ih];W[gj];B[fj];W[ji]

% ;B[sd];W[se];B[hg];W[ff];B[jo];W[kq];B[io];W[nl]}

% \drawboard

% \clearnumbers

% \parse{;B[hd];W[id];B[gb];W[na];B[la];W[oa]

% ;B[pa];W[nd];B[nb];W[ma];B[pb];W[fh];B[fi];W[ea];B[db];W[ge];B[ne];W[ld];B[pi];W[qh]

% ;B[kr];W[kp];B[gk];W[hk];B[ds];W[cs];B[af];W[ag];B[ae];W[ga];B[ha];W[np];B[mq];W[pk]

% ;B[qj];W[pl];B[om];W[gl];B[hh];W[jh];B[qm];W[nn];B[qo];W[hc];B[gc];W[ie];B[fm])}

% \drawboard

% 

Park Junghwan even the game by winning the second game by 2.5 points. The game was quite territory oriented. Black claimed the right side, while white went for the left side and aimed for the upper board. There was a big trade at move 205. White sacrificed his 7 stones (about 12 points) for black's 5 stones. The trade was even I think. However, black eventually came out ahead after the trade.







\stoptext



% ;FF[4];AW[gg:hh][ij][kl][op]AB[kk][gh]AB[ll]AW[oo]AE[hg];B[dd]BT[567];W[cc]WT[1234];B[];W[];B[dc];W[cd];B[ce];W[be];B[cf];W[bf];B[cg]