2 Glaurung, a UCI chess playing engine.
3 Copyright (C) 2004-2008 Tord Romstad
5 Glaurung is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 Glaurung is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
30 #include "ucioption.h"
37 bool Chess960 = false;
41 //// Local definitions
50 enum OptionType { SPIN, COMBO, CHECK, STRING, BUTTON, OPTION_TYPE_NONE};
53 char name[50], defaultValue[300], currentValue[300];
55 int minValue, maxValue;
56 char comboValues[8][64];
65 { "Use Search Log", "false", "false", CHECK, 0, 0, {""} },
66 { "Search Log Filename", "SearchLog.txt", "SearchLog.txt", STRING, 0, 0, {""} },
67 { "Book File", "book.bin", "book.bin", STRING, 0, 0, {""} },
68 { "Mobility (Middle Game)", "100", "100", SPIN, 0, 200, {""} },
69 { "Mobility (Endgame)", "100", "100", SPIN, 0, 200, {""} },
70 { "Pawn Structure (Middle Game)", "100", "100", SPIN, 0, 200, {""} },
71 { "Pawn Structure (Endgame)", "100", "100", SPIN, 0, 200, {""} },
72 { "Passed Pawns (Middle Game)", "100", "100", SPIN, 0, 200, {""} },
73 { "Passed Pawns (Endgame)", "100", "100", SPIN, 0, 200, {""} },
74 { "Aggressiveness", "100", "100", SPIN, 0, 200, {""} },
75 { "Cowardice", "100", "100", SPIN, 0, 200, {""} },
76 { "King Safety Curve", "Quadratic", "Quadratic", COMBO, 0, 0,
77 { "Quadratic", "Linear" /*, "From File"*/ } },
78 { "King Safety Coefficient", "40", "40", SPIN, 1, 100 , {""} },
79 { "King Safety X Intercept", "0", "0", SPIN, 0, 20, {""} },
80 { "King Safety Max Slope", "30", "30", SPIN, 10, 100, {""} },
81 { "King Safety Max Value", "500", "500", SPIN, 100, 1000, {""} },
82 { "Queen Contact Check Bonus", "4", "4", SPIN, 0, 8, {""} },
83 { "Rook Contact Check Bonus", "2", "2", SPIN, 0, 4, {""} },
84 { "Queen Check Bonus", "2", "2", SPIN, 0, 4, {""} },
85 { "Rook Check Bonus", "1", "1", SPIN, 0, 4, {""} },
86 { "Bishop Check Bonus", "1", "1", SPIN, 0, 4, {""} },
87 { "Knight Check Bonus", "1", "1", SPIN, 0, 4, {""} },
88 { "Discovered Check Bonus", "3", "3", SPIN, 0, 8, {""} },
89 { "Mate Threat Bonus", "3", "3", SPIN, 0, 8, {""} },
90 { "Check Extension (PV nodes)", "2", "2", SPIN, 0, 2, {""} },
91 { "Check Extension (non-PV nodes)", "1", "1", SPIN, 0, 2, {""} },
92 { "Single Reply Extension (PV nodes)", "2", "2", SPIN, 0, 2, {""} },
93 { "Single Reply Extension (non-PV nodes)", "2", "2", SPIN, 0, 2, {""} },
94 { "Mate Threat Extension (PV nodes)", "0", "0", SPIN, 0, 2, {""} },
95 { "Mate Threat Extension (non-PV nodes)", "0", "0", SPIN, 0, 2, {""} },
96 { "Pawn Push to 7th Extension (PV nodes)", "1", "1", SPIN, 0, 2, {""} },
97 { "Pawn Push to 7th Extension (non-PV nodes)", "1", "1", SPIN, 0, 2, {""} },
98 { "Passed Pawn Extension (PV nodes)", "1", "1", SPIN, 0, 2, {""} },
99 { "Passed Pawn Extension (non-PV nodes)", "0", "0", SPIN, 0, 2, {""} },
100 { "Pawn Endgame Extension (PV nodes)", "2", "2", SPIN, 0, 2, {""} },
101 { "Pawn Endgame Extension (non-PV nodes)", "2", "2", SPIN, 0, 2, {""} },
102 { "Full Depth Moves (PV nodes)", "14", "14", SPIN, 1, 100, {""} },
103 { "Full Depth Moves (non-PV nodes)", "3", "3", SPIN, 1, 100, {""} },
104 { "Threat Depth", "5", "5", SPIN, 0, 100, {""} },
105 { "Selective Plies", "7", "7", SPIN, 0, 10, {""} },
106 { "Futility Pruning (Main Search)", "true", "true", CHECK, 0, 0, {""} },
107 { "Futility Pruning (Quiescence Search)", "true", "true", CHECK, 0, 0, {""} },
108 { "Futility Margin 0", "50", "50", SPIN, 0, 1000, {""} },
109 { "Futility Margin 1", "100", "100", SPIN, 0, 1000, {""} },
110 { "Futility Margin 2", "300", "300", SPIN, 0, 1000, {""} },
111 { "Maximum Razoring Depth", "3", "3", SPIN, 0, 4, {""} },
112 { "Razoring Margin", "300", "300", SPIN, 150, 600, {""} },
113 { "Randomness", "0", "0", SPIN, 0, 10, {""} },
114 { "Minimum Split Depth", "4", "4", SPIN, 4, 7, {""} },
115 { "Maximum Number of Threads per Split Point", "5", "5", SPIN, 4, 8, {""} },
116 { "Threads", "1", "1", SPIN, 1, 8, {""} },
117 { "Hash", "32", "32", SPIN, 4, 4096, {""} },
118 { "Clear Hash", "false", "false", BUTTON, 0, 0, {""} },
119 { "Ponder", "true", "true", CHECK, 0, 0, {""} },
120 { "OwnBook", "true", "true", CHECK, 0, 0, {""} },
121 { "MultiPV", "1", "1", SPIN, 1, 500, {""} },
122 { "UCI_ShowCurrLine", "false", "false", CHECK, 0, 0, {""} },
123 { "UCI_Chess960", "false", "false", CHECK, 0, 0, {""} },
124 { "", "", "", OPTION_TYPE_NONE, 0, 0, {""}}
132 Option *option_with_name(const char *optionName);
141 /// init_uci_options() initializes the UCI options. Currently, the only
142 /// thing this function does is to initialize the default value of the
143 /// "Threads" parameter to the number of available CPU cores.
145 void init_uci_options() {
148 o = option_with_name("Threads");
151 // Limit the default value of "Threads" to 7 even if we have 8 CPU cores.
152 // According to Ken Dail's tests, Glaurung plays much better with 7 than
153 // with 8 threads. This is weird, but it is probably difficult to find out
154 // why before I have a 8-core computer to experiment with myself.
155 sprintf(o->defaultValue, "%d", Min(cpu_count(), 7));
156 sprintf(o->currentValue, "%d", Min(cpu_count(), 7));
158 // Increase the minimum split depth when the number of CPUs is big.
159 // It would probably be better to let this depend on the number of threads
161 o = option_with_name("Minimum Split Depth");
163 if(cpu_count() > 4) {
164 sprintf(o->defaultValue, "%d", 6);
165 sprintf(o->defaultValue, "%d", 6);
170 /// print_uci_options() prints all the UCI options to the standard output,
171 /// in the format defined by the UCI protocol.
173 void print_uci_options() {
174 static const char optionTypeName[][16] = {
175 "spin", "combo", "check", "string", "button"
177 for(Option *o = Options; o->type != OPTION_TYPE_NONE; o++) {
178 printf("option name %s type %s", o->name, optionTypeName[o->type]);
179 if(o->type != BUTTON) {
180 printf(" default %s", o->defaultValue);
182 printf(" min %d max %d", o->minValue, o->maxValue);
183 else if(o->type == COMBO)
184 for(int i = 0; strlen(o->comboValues[i]) > 0; i++)
185 printf(" var %s", o->comboValues[i]);
192 /// get_option_value_bool() returns the current value of a UCI parameter of
195 bool get_option_value_bool(const std::string &optionName) {
196 Option *o = option_with_name(optionName.c_str());
197 return o != NULL && strcmp(o->currentValue, "true") == 0;
201 /// get_option_value_int() returns the value of a UCI parameter as an integer.
202 /// Normally, this function will be used for a parameter of type "spin", but
203 /// it could also be used with a "combo" parameter, where all the available
204 /// values are integers.
206 int get_option_value_int(const std::string &optionName) {
207 Option *o = option_with_name(optionName.c_str());
208 return atoi(o->currentValue);
212 /// get_option_value_string() returns the current value of a UCI parameter as
213 /// a string. It is used with parameters of type "combo" and "string".
215 const std::string get_option_value_string(const std::string &optionName) {
216 Option *o = option_with_name(optionName.c_str());
217 return o->currentValue;
221 /// button_was_pressed() tests whether a UCI parameter of type "button" has
222 /// been selected since the last time the function was called.
224 bool button_was_pressed(const std::string &buttonName) {
225 if(get_option_value_bool(buttonName)) {
226 set_option_value(buttonName, "false");
234 /// set_option_value() inserts a new value for a UCI parameter. Note that
235 /// the function does not check that the new value is legal for the given
236 /// parameter: This is assumed to be the responsibility of the GUI.
238 void set_option_value(const std::string &optionName,
239 const std::string &newValue) {
240 Option *o = option_with_name(optionName.c_str());
243 strcpy(o->currentValue, newValue.c_str());
245 std::cout << "No such option: " << optionName << std::endl;
249 /// push_button() is used to tell the engine that a UCI parameter of type
250 /// "button" has been selected:
252 void push_button(const std::string &buttonName) {
253 set_option_value(buttonName, "true");
259 // option_with_name() tries to find a UCI option with a given
260 // name. It returns a pointer to the UCI option or the null pointer,
261 // depending on whether an option with the given name exists.
263 Option *option_with_name(const char *optionName) {
264 for(Option *o = Options; o->type != OPTION_TYPE_NONE; o++)
265 if(strcmp(o->name, optionName) == 0)