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
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 = [[], [], [], [], [], [], [], [], [], []]
31 @teban = nil # black => true, white => false
33 attr_accessor :array, :sente_hands, :gote_hands, :history, :sente_history, :gote_history
34 attr_reader :move_count
37 PieceKY::new(self, 1, 1, false)
38 PieceKE::new(self, 2, 1, false)
39 PieceGI::new(self, 3, 1, false)
40 PieceKI::new(self, 4, 1, false)
41 PieceOU::new(self, 5, 1, false)
42 PieceKI::new(self, 6, 1, false)
43 PieceGI::new(self, 7, 1, false)
44 PieceKE::new(self, 8, 1, false)
45 PieceKY::new(self, 9, 1, false)
46 PieceKA::new(self, 2, 2, false)
47 PieceHI::new(self, 8, 2, false)
49 PieceFU::new(self, i, 3, false)
52 PieceKY::new(self, 1, 9, true)
53 PieceKE::new(self, 2, 9, true)
54 PieceGI::new(self, 3, 9, true)
55 PieceKI::new(self, 4, 9, true)
56 PieceOU::new(self, 5, 9, true)
57 PieceKI::new(self, 6, 9, true)
58 PieceGI::new(self, 7, 9, true)
59 PieceKE::new(self, 8, 9, true)
60 PieceKY::new(self, 9, 9, true)
61 PieceKA::new(self, 8, 8, true)
62 PieceHI::new(self, 2, 8, true)
64 PieceFU::new(self, i, 7, true)
69 def have_piece?(hands, name)
70 piece = hands.find { |i|
76 def move_to(x0, y0, x1, y1, name, sente)
83 if ((x0 == 0) || (y0 == 0))
84 piece = have_piece?(hands, name)
85 return :illegal if (! piece.move_to?(x1, y1, name)) # TODO null check for the piece?
88 return :illegal if (! @array[x0][y0].move_to?(x1, y1, name)) # TODO null check?
89 if (@array[x0][y0].name != name) # promoted ?
90 @array[x0][y0].promoted = true
92 if (@array[x1][y1]) # capture
93 if (@array[x1][y1].name == "OU")
94 return :outori # return board update
96 @array[x1][y1].sente = @array[x0][y0].sente
97 @array[x1][y1].move_to(0, 0)
98 hands.sort! {|a, b| # TODO refactor. Move to Piece class
102 @array[x0][y0].move_to(x1, y1)
105 @teban = @teban ? false : true
109 def look_for_ou(sente)
115 (@array[x][y].name == "OU") &&
116 (@array[x][y].sente == sente))
123 raise "can't find ou"
126 # note checkmate, but check. sente is checked.
127 def checkmated?(sente) # sente is loosing
128 ou = look_for_ou(sente)
134 (@array[x][y].sente != sente))
135 if (@array[x][y].movable_grids.include?([ou.x, ou.y]))
146 def uchifuzume?(sente)
147 rival_ou = look_for_ou(! sente) # rival's ou
148 if (sente) # rival is gote
149 if ((rival_ou.y != 9) &&
150 (@array[rival_ou.x][rival_ou.y + 1]) &&
151 (@array[rival_ou.x][rival_ou.y + 1].name == "FU") &&
152 (@array[rival_ou.x][rival_ou.y + 1].sente == sente)) # uchifu true
154 fu_y = rival_ou.y + 1
159 if ((rival_ou.y != 1) &&
160 (@array[rival_ou.x][rival_ou.y - 1]) &&
161 (@array[rival_ou.x][rival_ou.y - 1].name == "FU") &&
162 (@array[rival_ou.x][rival_ou.y - 1].sente == sente)) # uchifu true
164 fu_y = rival_ou.y - 1
170 ## case: rival_ou is moving
171 rival_ou.movable_grids.each do |(cand_x, cand_y)|
172 tmp_board = Marshal.load(Marshal.dump(self))
173 s = tmp_board.move_to(rival_ou.x, rival_ou.y, cand_x, cand_y, "OU", ! sente)
174 raise "internal error" if (s != true)
175 if (! tmp_board.checkmated?(! sente)) # good move
180 ## case: rival is capturing fu
186 (@array[x][y].sente != sente) &&
187 @array[x][y].movable_grids.include?([fu_x, fu_y])) # capturable
190 if (@array[x][y].promoted)
191 names << @array[x][y].promoted_name
193 names << @array[x][y].name
194 if @array[x][y].promoted_name &&
195 @array[x][y].move_to?(fu_x, fu_y, @array[x][y].promoted_name)
196 names << @array[x][y].promoted_name
200 tmp_board = Marshal.load(Marshal.dump(self))
201 s = tmp_board.move_to(x, y, fu_x, fu_y, name, ! sente)
205 tmp_board.checkmated?(! sente) # result
208 all_illegal = names.find {|a| a != :illegal}
209 raise "internal error: legal move not found" if all_illegal == nil
210 r = names.find {|a| a == false} # good move
211 return false if r == false # found good move
220 # @[sente|gote]_history has at least one item while the player is checking the other or
222 def update_sennichite(player)
225 if checkmated?(!player)
227 @sente_history["dummy"] = 1 # flag to see Sente player is checking Gote player
229 @gote_history["dummy"] = 1 # flag to see Gote player is checking Sente player
233 @sente_history.clear # no more continuous check
235 @gote_history.clear # no more continuous check
238 if @sente_history.size > 0 # possible for Sente's or Gote's turn
239 @sente_history[str] += 1
241 if @gote_history.size > 0 # possible for Sente's or Gote's turn
242 @gote_history[str] += 1
246 def oute_sennichite?(player)
247 if (@sente_history[to_s] >= 4)
248 return :oute_sennichite_sente_lose
249 elsif (@gote_history[to_s] >= 4)
250 return :oute_sennichite_gote_lose
256 def sennichite?(sente)
257 if (@history[to_s] >= 4) # already 3 times
263 def good_kachi?(sente)
264 if (checkmated?(sente))
265 puts "'NG: Checkmating." if $DEBUG
269 ou = look_for_ou(sente)
270 if (sente && (ou.y >= 4))
271 puts "'NG: Black's OU does not enter yet." if $DEBUG
274 if (! sente && (ou.y <= 6))
275 puts "'NG: White's OU does not enter yet." if $DEBUG
293 (@array[x][y].sente == sente) &&
294 (@array[x][y].point > 0))
295 point = point + @array[x][y].point
301 hands.each do |piece|
302 point = point + piece.point
306 puts "'NG: Piece#[%d] is too small." % [number] if $DEBUG
311 puts "'NG: Black's point#[%d] is too small." % [point] if $DEBUG
316 puts "'NG: White's point#[%d] is too small." % [point] if $DEBUG
321 puts "'Good: Piece#[%d], Point[%d]." % [number, point] if $DEBUG
325 # sente is nil only if tests in test_board run
326 def handle_one_move(str, sente=nil)
327 if (str =~ /^([\+\-])(\d)(\d)(\d)(\d)([A-Z]{2})/)
334 elsif (str =~ /^%KACHI/)
335 raise ArgumentError, "sente is null", caller if sente == nil
336 if (good_kachi?(sente))
341 elsif (str =~ /^%TORYO/)
347 if (((x0 == 0) || (y0 == 0)) && # source is not from hand
348 ((x0 != 0) || (y0 != 0)))
350 elsif ((x1 == 0) || (y1 == 0)) # destination is out of board
355 sente = true if sente == nil # deprecated
356 return :illegal unless sente == true # black player's move must be black
359 sente = false if sente == nil # deprecated
360 return :illegal unless sente == false # white player's move must be white
365 if ((x0 == 0) && (y0 == 0))
366 return :illegal if (! have_piece?(hands, name))
367 elsif (! @array[x0][y0])
368 return :illegal # no piece
369 elsif (@array[x0][y0].sente != sente)
370 return :illegal # this is not mine
371 elsif (@array[x0][y0].name != name)
372 return :illegal if (@array[x0][y0].promoted_name != name) # can't promote
376 if (@array[x1][y1] &&
377 (@array[x1][y1].sente == sente)) # can't capture mine
379 elsif ((x0 == 0) && (y0 == 0) && @array[x1][y1])
380 return :illegal # can't put on existing piece
383 tmp_board = Marshal.load(Marshal.dump(self))
384 return :illegal if (tmp_board.move_to(x0, y0, x1, y1, name, sente) == :illegal)
385 return :oute_kaihimore if (tmp_board.checkmated?(sente))
386 tmp_board.update_sennichite(sente)
387 os_result = tmp_board.oute_sennichite?(sente)
388 return os_result if os_result # :oute_sennichite_sente_lose or :oute_sennichite_gote_lose
389 return :sennichite if tmp_board.sennichite?(sente)
391 if ((x0 == 0) && (y0 == 0) && (name == "FU") && tmp_board.uchifuzume?(sente))
395 move_to(x0, y0, x1, y1, name, sente)
397 update_sennichite(sente)
405 a.push(sprintf("P%d", y))
417 a.push(sprintf("\n"))
420 if (! sente_hands.empty?)
422 sente_hands.each do |p|
423 a.push("00" + p.name)
427 if (! gote_hands.empty?)
429 gote_hands.each do |p|
430 a.push("00" + p.name)
434 a.push("%s\n" % [@teban ? "+" : "-"])