typedef struct {
    s_char side;              // Owner (0-10, or SIDE_NONE, SIDE_FIGHT)
    s_char *value;            // Troop count per side [0-maxval]
    s_char level;             // Terrain elevation
    s_char growth;            // Town production rate (0-255)
    s_char move;              // Number of active direction vectors
    s_char *dir;              // Direction vector array [0-6 directions]
    s_char age;               // How long owned by same side
    // ... plus march, visibility, etc.
} cell_type;

// Movement calculation (from update_cell):
nmove = surplus * 
        move_hinder[dest_level] *      // Terrain difficulty
        move_shunt[current_troops] *   // Supply line attenuation  
        move_speed *                   // Speed setting
        (1.0 - move_slope[level_diff]) // Hill penalty

#define MAX_PLAYERS        11
#define MAX_DIRECTIONS      6
#define MAXVAL             50  // Max troops per cell
#define TOWN_MIN           50  // Minimum town production
#define TOWN_MAX          100  // Maximum town production

// Default values:
#define DEFAULT_BOARD      15  // Board size
#define DEFAULT_MAXVAL     20  // Cell capacity
#define DEFAULT_FIGHT       5  // Combat intensity
#define DEFAULT_MOVE        3  // Movement speed

#define CMD_ATTACK         3   // Attack command
#define CMD_DIG            6   // Lower terrain
#define CMD_FILL           8   // Raise terrain  
#define CMD_BUILD         10   // Build cities
#define CMD_SCUTTLE       12   // Destroy troops
#define CMD_PARATROOPS    14   // Airborne attack
#define CMD_ARTILLERY     16   // Ranged attack
#define CMD_MARCH_*       20   // Automated movement

// Main update cycle (from update_board):
1. Randomize cell update order
2. For each cell:
   - Update growth (troop production)
   - Handle managed operations
   - Process decay
   - Resolve combat if fighting
   - Process movement in random direction order
3. Redraw changed cells