3 ## Copyright (C) 2004 NABEYA Kenichi (aka nanami@2ch)
4 ## Copyright (C) 2007-2008 Daigo Moriwaki (daigo at debian dot org)
6 ## This program is free software; you can redistribute it and/or modify
7 ## it under the terms of the GNU General Public License as published by
8 ## the Free Software Foundation; either version 2 of the License, or
9 ## (at your option) any later version.
11 ## This program is distributed in the hope that it will be useful,
12 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ## GNU General Public License for more details.
16 ## You should have received a copy of the GNU General Public License
17 ## along with this program; if not, write to the Free Software
18 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 module ShogiServer # for a namespace
23 def initialize(move_count=0)
24 @sente_hands = Array::new
25 @gote_hands = Array::new
26 @history = Hash::new(0)
27 @sente_history = Hash::new(0)
28 @gote_history = Hash::new(0)
29 @array = [[], [], [], [], [], [], [], [], [], []]
30 @move_count = move_count
31 @teban = nil # black => true, white => false
33 attr_accessor :array, :sente_hands, :gote_hands, :history, :sente_history, :gote_history, :teban
34 attr_reader :move_count
37 return Marshal.load(Marshal.dump(self))
41 PieceKY::new(self, 1, 1, false)
42 PieceKE::new(self, 2, 1, false)
43 PieceGI::new(self, 3, 1, false)
44 PieceKI::new(self, 4, 1, false)
45 PieceOU::new(self, 5, 1, false)
46 PieceKI::new(self, 6, 1, false)
47 PieceGI::new(self, 7, 1, false)
48 PieceKE::new(self, 8, 1, false)
49 PieceKY::new(self, 9, 1, false)
50 PieceKA::new(self, 2, 2, false)
51 PieceHI::new(self, 8, 2, false)
53 PieceFU::new(self, i, 3, false)
56 PieceKY::new(self, 1, 9, true)
57 PieceKE::new(self, 2, 9, true)
58 PieceGI::new(self, 3, 9, true)
59 PieceKI::new(self, 4, 9, true)
60 PieceOU::new(self, 5, 9, true)
61 PieceKI::new(self, 6, 9, true)
62 PieceGI::new(self, 7, 9, true)
63 PieceKE::new(self, 8, 9, true)
64 PieceKY::new(self, 9, 9, true)
65 PieceKA::new(self, 8, 8, true)
66 PieceHI::new(self, 2, 8, true)
68 PieceFU::new(self, i, 7, true)
73 def have_piece?(hands, name)
74 piece = hands.find { |i|
80 def move_to(x0, y0, x1, y1, name, sente)
87 if ((x0 == 0) || (y0 == 0))
88 piece = have_piece?(hands, name)
89 return :illegal if (piece == nil || ! piece.move_to?(x1, y1, name))
92 if (@array[x0][y0] == nil || !@array[x0][y0].move_to?(x1, y1, name))
95 if (@array[x0][y0].name != name) # promoted ?
96 @array[x0][y0].promoted = true
98 if (@array[x1][y1]) # capture
99 if (@array[x1][y1].name == "OU")
100 return :outori # return board update
102 @array[x1][y1].sente = @array[x0][y0].sente
103 @array[x1][y1].move_to(0, 0)
104 hands.sort! {|a, b| # TODO refactor. Move to Piece class
108 @array[x0][y0].move_to(x1, y1)
111 @teban = @teban ? false : true
115 def look_for_ou(sente)
121 (@array[x][y].name == "OU") &&
122 (@array[x][y].sente == sente))
129 raise "can't find ou"
132 # note checkmate, but check. sente is checked.
133 def checkmated?(sente) # sente is loosing
134 ou = look_for_ou(sente)
140 (@array[x][y].sente != sente))
141 if (@array[x][y].movable_grids.include?([ou.x, ou.y]))
152 def uchifuzume?(sente)
153 rival_ou = look_for_ou(! sente) # rival's ou
154 if (sente) # rival is gote
155 if ((rival_ou.y != 9) &&
156 (@array[rival_ou.x][rival_ou.y + 1]) &&
157 (@array[rival_ou.x][rival_ou.y + 1].name == "FU") &&
158 (@array[rival_ou.x][rival_ou.y + 1].sente == sente)) # uchifu true
160 fu_y = rival_ou.y + 1
165 if ((rival_ou.y != 1) &&
166 (@array[rival_ou.x][rival_ou.y - 1]) &&
167 (@array[rival_ou.x][rival_ou.y - 1].name == "FU") &&
168 (@array[rival_ou.x][rival_ou.y - 1].sente == sente)) # uchifu true
170 fu_y = rival_ou.y - 1
176 ## case: rival_ou is moving
177 rival_ou.movable_grids.each do |(cand_x, cand_y)|
178 tmp_board = deep_copy
179 s = tmp_board.move_to(rival_ou.x, rival_ou.y, cand_x, cand_y, "OU", ! sente)
180 raise "internal error" if (s != true)
181 if (! tmp_board.checkmated?(! sente)) # good move
186 ## case: rival is capturing fu
192 (@array[x][y].sente != sente) &&
193 @array[x][y].movable_grids.include?([fu_x, fu_y])) # capturable
196 if (@array[x][y].promoted)
197 names << @array[x][y].promoted_name
199 names << @array[x][y].name
200 if @array[x][y].promoted_name &&
201 @array[x][y].move_to?(fu_x, fu_y, @array[x][y].promoted_name)
202 names << @array[x][y].promoted_name
206 tmp_board = deep_copy
207 s = tmp_board.move_to(x, y, fu_x, fu_y, name, ! sente)
211 tmp_board.checkmated?(! sente) # result
214 all_illegal = names.find {|a| a != :illegal}
215 raise "internal error: legal move not found" if all_illegal == nil
216 r = names.find {|a| a == false} # good move
217 return false if r == false # found good move
226 # @[sente|gote]_history has at least one item while the player is checking the other or
228 def update_sennichite(player)
231 if checkmated?(!player)
233 @sente_history["dummy"] = 1 # flag to see Sente player is checking Gote player
235 @gote_history["dummy"] = 1 # flag to see Gote player is checking Sente player
239 @sente_history.clear # no more continuous check
241 @gote_history.clear # no more continuous check
244 if @sente_history.size > 0 # possible for Sente's or Gote's turn
245 @sente_history[str] += 1
247 if @gote_history.size > 0 # possible for Sente's or Gote's turn
248 @gote_history[str] += 1
252 def oute_sennichite?(player)
253 if (@sente_history[to_s] >= 4)
254 return :oute_sennichite_sente_lose
255 elsif (@gote_history[to_s] >= 4)
256 return :oute_sennichite_gote_lose
262 def sennichite?(sente)
263 if (@history[to_s] >= 4) # already 3 times
269 def good_kachi?(sente)
270 if (checkmated?(sente))
271 puts "'NG: Checkmating." if $DEBUG
275 ou = look_for_ou(sente)
276 if (sente && (ou.y >= 4))
277 puts "'NG: Black's OU does not enter yet." if $DEBUG
280 if (! sente && (ou.y <= 6))
281 puts "'NG: White's OU does not enter yet." if $DEBUG
299 (@array[x][y].sente == sente) &&
300 (@array[x][y].point > 0))
301 point = point + @array[x][y].point
307 hands.each do |piece|
308 point = point + piece.point
312 puts "'NG: Piece#[%d] is too small." % [number] if $DEBUG
317 puts "'NG: Black's point#[%d] is too small." % [point] if $DEBUG
322 puts "'NG: White's point#[%d] is too small." % [point] if $DEBUG
327 puts "'Good: Piece#[%d], Point[%d]." % [number, point] if $DEBUG
331 # sente is nil only if tests in test_board run
332 def handle_one_move(str, sente=nil)
333 if (str =~ /^([\+\-])(\d)(\d)(\d)(\d)([A-Z]{2})/)
340 elsif (str =~ /^%KACHI/)
341 raise ArgumentError, "sente is null", caller if sente == nil
342 if (good_kachi?(sente))
347 elsif (str =~ /^%TORYO/)
353 if (((x0 == 0) || (y0 == 0)) && # source is not from hand
354 ((x0 != 0) || (y0 != 0)))
356 elsif ((x1 == 0) || (y1 == 0)) # destination is out of board
361 sente = true if sente == nil # deprecated
362 return :illegal unless sente == true # black player's move must be black
365 sente = false if sente == nil # deprecated
366 return :illegal unless sente == false # white player's move must be white
371 if ((x0 == 0) && (y0 == 0))
372 return :illegal if (! have_piece?(hands, name))
373 elsif (! @array[x0][y0])
374 return :illegal # no piece
375 elsif (@array[x0][y0].sente != sente)
376 return :illegal # this is not mine
377 elsif (@array[x0][y0].name != name)
378 return :illegal if (@array[x0][y0].promoted_name != name) # can't promote
382 if (@array[x1][y1] &&
383 (@array[x1][y1].sente == sente)) # can't capture mine
385 elsif ((x0 == 0) && (y0 == 0) && @array[x1][y1])
386 return :illegal # can't put on existing piece
389 tmp_board = deep_copy
390 return :illegal if (tmp_board.move_to(x0, y0, x1, y1, name, sente) == :illegal)
391 return :oute_kaihimore if (tmp_board.checkmated?(sente))
392 tmp_board.update_sennichite(sente)
393 os_result = tmp_board.oute_sennichite?(sente)
394 return os_result if os_result # :oute_sennichite_sente_lose or :oute_sennichite_gote_lose
395 return :sennichite if tmp_board.sennichite?(sente)
397 if ((x0 == 0) && (y0 == 0) && (name == "FU") && tmp_board.uchifuzume?(sente))
401 move_to(x0, y0, x1, y1, name, sente)
403 update_sennichite(sente)
411 a.push(sprintf("P%d", y))
423 a.push(sprintf("\n"))
426 if (! sente_hands.empty?)
428 sente_hands.each do |p|
429 a.push("00" + p.name)
433 if (! gote_hands.empty?)
435 gote_hands.each do |p|
436 a.push("00" + p.name)
440 a.push("%s\n" % [@teban ? "+" : "-"])