Rogue

References

1. ^Rogue 5.4 lays out each level as nine boxes in a 3 by 3 grid over the 80 by 24 screen. It first marks 0 to 3 boxes, picked at random and possibly the same twice, as gone: a gone box gets a point for corridors to meet but no room. Each other box gets a room; it is dark when a roll of 0 to 9 is below the depth less 1, and a dark room is a maze at a chance of 1 in 15.CodeRogue 5.4.4 source
   How we know

   22#define MAXROOMS	9
   

   31#define	NUMCOLS		80
   

   41    bsze.x = NUMCOLS / 3;
   

   57	rooms[rnd_room()].r_flags |= ISGONE;
   

   Place a gone room.

   86	if (rnd(10) < level - 1)
   

   if not gone pick door pos

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

2. ^Rogue 5.4 joins the boxes with corridors only between grid neighbors: from a random box it grows a tree, each step joining a random neighbor not yet joined, until all nine are connected, and then makes 0 to 4 tries at an extra corridor between a random box and a neighbor it isn't joined to.CodeRogue 5.4.4 source
   How we know

   38	{ { 0, 1, 0, 1, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
   

   69	    if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
   

   101    for (roomcount = rnd(5); roomcount > 0; roomcount--)
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

3. ^NetHack 3.6.7's main dungeon, the Dungeons of Doom, holds one level built in Rogue's style. Its code's comment says “Rogue levels are structured 3 by 3, with each section containing a room or an intersection”, and each of the nine cells is an intersection at a chance of 1 in 5, so long as at least one room is made.CodeNetHack 3.6.7 source
   How we know

   20LEVEL:		"rogue" "R" @ (15, 4)
   

   Rogue levels are structured 3 by 3, with each section containing

   233            if (!rn2(5) && (nroom || (x < 2 && y < 2))) {
   

   700        makeroguerooms();
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

4. ^Rogue 5.4 starts the hero with 1,300 food. The stomach daemon runs once per pass of the command loop, after the hero's move, or after both moves when the hero is hasted. While food is above 0 it takes 1, plus each worn ring's cost, and 1 less while the hero carries the Amulet of Yendor, so with the Amulet and no rings the count stops.CodeRogue 5.4.4 source
   How we know

   29    food_left = HUNGERTIME;
   

   117#define HUNGERTIME	1300
   

   150    start_daemon(stomach, 0, AFTER);
   

   32    if (on(player, ISHASTE))
   

   444    do_daemons(AFTER);
   

   163	food_left -= ring_eat(LEFT) + ring_eat(RIGHT) + 1 - amulet;
   

   148	amulet = TRUE;
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

5. ^In Rogue 5.4 each worn ring adds to the turn's food cost by kind: 2 for regeneration; 1 for protection, add strength, sustain strength, stealth, or maintain armor; 1 at a chance of 1 in 3 for searching, dexterity, or increase damage, and 1 in 5 for see invisible; 0 for adornment, aggravate monster, or teleportation. A ring of slow digestion gives 1 back at a chance of 1 in 2.CodeRogue 5.4.4 source
   How we know

   -2, /* R_DIGEST */

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

6. ^Rogue 5.4 shows Hungry once food drops below 300 and Weak below 150. At 0 or below, rings stop counting and food drops by 1 a turn; on each turn the hero isn't already helpless, a 1-in-5 chance faints the hero for 4 to 11 turns, and the hero starves once the count is below −850.CodeRogue 5.4.4 source
   How we know

   118#define MORETIME	150
   

   146	if (food_left-- < -STARVETIME)
   

   171	else if (food_left < 2 * MORETIME && oldfood >= 2 * MORETIME)
   ⋮
   176	    else
   

   184	"", "Hungry", "Weak", "Faint"
   

   188    return range == 0 ? 0 : abs((int) RN) % range;
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

7. ^In Rogue 5.4 an attack hits when rnd(20), a roll of 0 to 19, plus a to-hit bonus is at least 20 less the attacker's level less the defender's armor class. The bonus is the weapon's plus (with a fired missile's launcher plus, and the hero's dexterity rings when the weapon used is the hero's wielded one), the attacker's strength adjustment, and +4 when the target isn't running (asleep or held); a hero defender's armor class is the worn armor's, when the hero wears any, less any rings of protection. Computed, the chance is (level + armor class + bonus) / 20, held within 0 to 100%. Damage is rolled only after a hit.CodeRogue 5.4.4 sourcerevised
   How we know

   381    int need = (20 - at_lvl) - op_arm;
   

   431		hplus += cur_weapon->o_hplus;
   

   442    if (!on(*thdef, ISRUN))
   

   460	if (swing(att->s_lvl, def_arm, hplus + str_plus[att->s_str]))
   

   188    return range == 0 ? 0 : abs((int) RN) % range;
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Revised after a check by a second AI model, 2026-10-21.

   In the claim ledger

8. ^When a Rogue 5.4 hero dies, death shows the tombstone (or, with the tombstone option off, one line naming the killer), records the score, waits for return, and exits the program.CodeRogue 5.4.4 sourcerevised
   How we know

   228death(char monst)
   

   240    if (!tombstone)
   

   274    my_exit(0);
   

   394    exit(st);
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Revised after a check by a second AI model, 2026-10-21.

   In the claim ledger

9. ^Restoring a Rogue 5.4 game deletes the save file as soon as it is read, refuses a file with another hard link or reached through a symbolic link, “to defeat multiple restarting from the same place”, and refuses a saved hero with no hit points left. It then reseeds the random number generator from the process id. A wizard in a debug (MASTER) build skips the deletion and the link check.CodeRogue 5.4.4 source
   How we know

   226        md_unlink_open_file(file, inf) < 0)
   

   defeat multiple restarting from the same place

   250    if (pstats.s_hpt <= 0)
   

   262    srand(md_getpid());
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

10. ^At the start of each game, Rogue 5.4 gives each of its 14 kinds of potion a different color, drawn at random from a list of 27 (amber to yellow), and each of its 18 kinds of scroll a title of 2 to 4 random words, each word 1 to 3 syllables from a fixed list, up to about 40 characters.CodeRogue 5.4.4 source
    How we know

    119    init_colors();			/* Set up colors of potions */
    

    111#define NCOLORS (sizeof rainbow / sizeof (char *))
    

    250	until (!used[j]);
    

    272	nwords = rnd(3) + 2;
    

    219#define MAXPOTIONS	14
    

    242#define MAXSCROLLS	18
    

    Checked against the evidence by its author, an AI model, 2026-10-21.

    Checked by a second AI model, 2026-10-21.

    In the claim ledger