uct/internal.h

   1 #ifndef PACHI_UCT_INTERNAL_H
   2 #define PACHI_UCT_INTERNAL_H
   3
   4 /* Internal UCT structures */
   5
   6 #include "debug.h"
   7 #include "move.h"
   8 #include "ownermap.h"
   9 #include "pattern.h"
  10 #include "patternsp.h"
  11 #include "patternprob.h"
  12 #include "playout.h"
  13 #include "stats.h"
  14
  15 struct tree;
  16 struct tree_node;
  17 struct uct_policy;
  18 struct uct_prior;
  19 struct uct_dynkomi;
  20 struct uct_pluginset;
  21 struct joseki_dict;
  22
  23 /* How big proportion of ownermap counts must be of one color to consider
  24  * the point sure. */
  25 #define GJ_THRES        0.8
  26 /* How many games to consider at minimum before judging groups. */
  27 #define GJ_MINGAMES     500
  28
  29 /* Internal engine state. */
  30 struct uct {
  31         int debug_level;
  32         int games, gamelen;
  33         floating_t resign_threshold, sure_win_threshold;
  34         double best2_ratio, bestr_ratio;
  35         floating_t max_maintime_ratio;
  36         bool pass_all_alive; /* Current value */
  37         bool territory_scoring;
  38         int expand_p;
  39         bool playout_amaf;
  40         bool amaf_prior;
  41         int playout_amaf_cutoff;
  42         int dumpthres;
  43         int force_seed;
  44         bool no_tbook;
  45         bool fast_alloc;
  46         unsigned long max_tree_size;
  47         unsigned long max_pruned_size;
  48         unsigned long pruning_threshold;
  49         int mercymin;
  50         int significant_threshold;
  51
  52         int threads;
  53         enum uct_thread_model {
  54                 TM_TREE, /* Tree parallelization w/o virtual loss. */
  55                 TM_TREEVL, /* Tree parallelization with virtual loss. */
  56         } thread_model;
  57         int virtual_loss;
  58         bool pondering_opt; /* User wants pondering */
  59         bool pondering; /* Actually pondering now */
  60         bool slave; /* Act as slave in distributed engine. */
  61         int max_slaves; /* Optional, -1 if not set */
  62         int slave_index; /* 0..max_slaves-1, or -1 if not set */
  63         enum stone my_color;
  64
  65         int fuseki_end;
  66         int yose_start;
  67
  68         int dynkomi_mask;
  69         int dynkomi_interval;
  70         struct uct_dynkomi *dynkomi;
  71
  72         floating_t val_scale;
  73         int val_points;
  74         bool val_extra;
  75
  76         int random_policy_chance;
  77         bool local_tree;
  78         int tenuki_d;
  79         floating_t local_tree_aging;
  80 #define LTREE_PLAYOUTS_MULTIPLIER 100
  81         floating_t local_tree_depth_decay;
  82         bool local_tree_allseq;
  83         bool local_tree_neival;
  84         enum {
  85                 LTE_ROOT,
  86                 LTE_EACH,
  87                 LTE_TOTAL,
  88         } local_tree_eval;
  89         bool local_tree_rootchoose;
  90
  91         char *banner;
  92
  93         struct uct_policy *policy;
  94         struct uct_policy *random_policy;
  95         struct playout_policy *playout;
  96         struct uct_prior *prior;
  97         struct uct_pluginset *plugins;
  98         struct joseki_dict *jdict;
  99
 100         struct pattern_setup pat;
 101         /* Various modules (prior, policy, ...) set this if they want pattern
 102          * database to be loaded. */
 103         bool want_pat;
 104
 105         /* Used within frame of single genmove. */
 106         struct board_ownermap ownermap;
 107         /* Used for coordination among slaves of the distributed engine. */
 108         int stats_hbits;
 109         int shared_nodes;
 110         int shared_levels;
 111         double stats_delay; /* stored in seconds */
 112         int played_own;
 113         int played_all; /* games played by all slaves */
 114
 115         /* Game state - maintained by setup_state(), reset_state(). */
 116         struct tree *t;
 117 };
 118
 119 #define UDEBUGL(n) DEBUGL_(u->debug_level, n)
 120
 121 bool uct_pass_is_safe(struct uct *u, struct board *b, enum stone color, bool pass_all_alive);
 122
 123 void uct_prepare_move(struct uct *u, struct board *b, enum stone color);
 124 void uct_genmove_setup(struct uct *u, struct board *b, enum stone color);
 125 void uct_pondering_stop(struct uct *u);
 126
 127
 128 /* This is the state used for descending the tree; we use this wrapper
 129  * structure in order to be able to easily descend in multiple trees
 130  * in parallel (e.g. main tree and local tree) or compute cummulative
 131  * "path value" throughout the tree descent. */
 132 struct uct_descent {
 133         /* Active tree nodes: */
 134         struct tree_node *node; /* Main tree. */
 135         struct tree_node *lnode; /* Local tree. */
 136         /* Value of main tree node (with all value factors, but unbiased
 137          * - without exploration factor), from black's perspective. */
 138         struct move_stats value;
 139 };
 140
 141
 142 typedef struct tree_node *(*uctp_choose)(struct uct_policy *p, struct tree_node *node, struct board *b, enum stone color, coord_t exclude);
 143 typedef floating_t (*uctp_evaluate)(struct uct_policy *p, struct tree *tree, struct uct_descent *descent, int parity);
 144 typedef void (*uctp_descend)(struct uct_policy *p, struct tree *tree, struct uct_descent *descent, int parity, bool allow_pass);
 145 typedef void (*uctp_winner)(struct uct_policy *p, struct tree *tree, struct uct_descent *descent);
 146 typedef void (*uctp_prior)(struct uct_policy *p, struct tree *tree, struct tree_node *node, struct board *b, enum stone color, int parity);
 147 typedef void (*uctp_update)(struct uct_policy *p, struct tree *tree, struct tree_node *node, enum stone node_color, enum stone player_color, struct playout_amafmap *amaf, struct board *final_board, floating_t result);
 148
 149 struct uct_policy {
 150         struct uct *uct;
 151         uctp_choose choose;
 152         uctp_winner winner;
 153         uctp_evaluate evaluate;
 154         uctp_descend descend;
 155         uctp_update update;
 156         uctp_prior prior;
 157         bool wants_amaf;
 158         void *data;
 159 };
 160
 161 #endif