adding some max pruning... not working past depth 25?

checkers.rb

@@ -226,7 +226,7 @@ class Board
 					moves.each { |move|
 						board = dup()
 						board.do_move(x, y, move, team(x, y))
-						boards.push(board)
+						boards.push( { "board" => board, "move" => move})
 					}
 				end
 			end
@@ -247,18 +247,19 @@ class Board
 	end
 
 	def search(team)
-		@top_depth = 10
-		search_do(team, @top_depth, 100.0, 0.0, "R")
+		@top_depth = 26
+		search_do(team, @top_depth, 100.0, 0.0, "R", {TEAM_1 => -100, TEAM_2 =>  -100})
 	end
 
-	def search_do(team, depth, percent, last_percent, location)
+	def search_do(team, depth, percent, last_percent, location, maxs)
 		#puts location
 		if depth == 0
 			#puts "DONE"
 			return score(team)
 		end
-		max = -100
-
+		if score(team) < maxs[team]
+			return score(team)
+		end
 		#if team == TEAM_1
 		#	puts depth.to_s + ": TEAM_1's turn:"
 		#else
@@ -277,26 +278,30 @@ class Board
 				puts "NO MOVES AVAILABLE?"
 				return score(team)
 			else
+				jumps = moves.find_all { |item| item['move'][0].is_a?(Array)}
+				if jumps.length > 0
+					moves = jumps
+				end
 				done = 0.0
 				item_percent = percent/moves.length
 
 				for i in 0..moves.length-1 do
 					#moves.each { |move|
-					move = moves[i]
+					move = moves[i]['board']
 					#puts "SEARCH"
-        				sub_score = move.search_do(opposite_team(team), depth -1, item_percent, last_percent+done, location + "." +i.to_s )
+        				sub_score = move.search_do(opposite_team(team), depth -1, item_percent, last_percent+done, location + "." +i.to_s, maxs.dup )
        					done += item_percent
 					if done >= 0.0001
           					last_percent += done;
-						puts "%.5f" % last_percent + "% depth: " + depth.to_s + " max: " + max.to_s
+						puts "%.5f" % last_percent + "% depth: " + depth.to_s + " max: " + maxs.to_s
 						done = 0.0
         				end
 					#puts "Score: " + sub_score.to_s
-					if sub_score > max
-						max = sub_score
+					if sub_score > maxs[team]
+						maxs[team] = sub_score
 					end
 				end
-				return max
+				return maxs[team]
 			end
 		 end
 	end