uct/internal.h

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