This program was first published in the HP41C Users' Library Solutions: Games by HewlettPackard and is used here by permission.
This program is supplied without representation or warranty of any kind. HewlettPackard Company and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.
There are 20 caves each connected to 3 others. There are 6 occupied caves: 2 with super bats, 2 with pits, 1 with a wumpus, and 1 with a hunter (you). The object is to move from cave to cave, watching the warnings to see what is nearby, find the wumpus and shoot it with an arrow. You may only move or shoot into an adjacent cave.
The warnings are as follows:
"SMELL WUMPUS"  The wumpus is in an adjacent cave.
"FEEL A DRAFT"  Pits are in adjacent cave(s).
"HEAR SQUEAKS"  Super bats are in adjacent cave (s ) .
If you walk into the cave with the wumpus he will eat you. If you shoot an arrow and miss (by shooting into the wrong cave), you wake the wumpus up and he moves to one of his adjacent caves. If it's the cave you are in, he eats you. Since he has sucker feet he can walk into a cave with pits without falling. And, since he is too heavy for the bats, they cannot bother him. If you walk into a cave with pits, you fall and the game is ended. If you walk into a cave with super bats, they will carry you to some other cave randomly chosen. If the wumpus, pits, or more super bats are there, you will suffer their consequences. The bats then return to their original cave.
Each time you move you will first see the consequences (if any) of your move: "CHOMP" means you've been eaten by the wumpus, "YYIIIEEEE..." means you've fallen into a pit, and "SNATCH" followed by "MOVED TO ( )" means the super bats have grabbed you and moved you. After the consequences you see any warnings that are appropriate. Last, you will see the cave you are in followed by your adjacent caves.
The caves are arranged as a dodechedron with each vertex being a cave and each edge a tunnel.
Note: Requires 1 Memory Module on HP41C
Step 
Instructions 
Input Data/Units 
Keys 
Output Data/Units 
1 
Enter program 

2 
Initialize 

[XEQ] WUMPUS 
SEED? 
3 
Key in number between 0 and 1  seed 
[R/S] 
(warnings) 



(caves) 

4 
To move: 
cave # 
[A] 
(consequences) 
(warnings) 

(caves) 

5 
To shoot an arrow: 
cave # 
[B] 
(consequences) 
(warnings) 

(caves) 

6 
To see warnings and caves again:  [C] 
(warnings) 

(caves) 

7 
For another game: 

[E] 
(warnings) 




(caves) 
8 
Go to step 4 or 5. 


Keystrokes: Display: [XEQ] [ALPHA] SIZE [ALPHA] 012 [XEQ] [ALPHA] WUMPUS [ALPHA] SEED? .1232123 [R/S] HEAR SQUEAKS [R/S] 61,7,15 1 [A] SNATCH [R/S] MOVED TO 3 [R/S] HEAR SQUEAKS [R/S] 34,2,10 10 [A] FEEL A DRAFT [R/S] 103,11,9 11 [A] SMELL WUMPUS [R/S] 1118,12,10 12 [B] 1118,12,10 18 [A] SMELL WUMPUS [R/S] 1811,19,17 19 [B] 1811,19,17 17 [A] SMELL WUMPUS [R/S] FEEL A DRAFT [R/S] 179,18,16 9 [A] YYIIIEEEE
(Note that you should have known pits were there from your pass through cave 10 and its warnings.)
LINE KEYS 001 LBL "WUMPUS" 002 0 ;Initialize 003 "SEED?" 004 PROMPT 005 STO 00 006 SF 27 007 LBL E 008 FIX 0 009 CF 29 010 1.006 011 STO 10 ;_________________ 012 LBL 13 013 RCL 10 014 INT 015 1 016  017 STO 11 018 20 019 XEQ 99 020 1 ; Pick a cave 021 + 022 LBL 12 ;_________________ 023 RCL IND 11 024 X<>Y ; Make sure it's not used 025 X=Y? 026 GTO 13 027 DSE 11 028 GTO 12 029 STO IND 10 030 ISG 10 031 GTO 13 032 LBL C ;_________________ 033 LBL 20 034 RCL 01 ; Check 035 XEQ 50 ; surroundings 036 "SMELL WUMPUS" 037 RCL 02 038 XEQ 21 039 "FEEL A DRAFT" 040 RCL 03 041 XEQ 21 042 RCL 04 043 XEQ 21 044 "HEAR SQUEAKS" 045 RCL 05 046 XEQ 21 047 RCL 06 048 XEQ 21 049 LBL 22 ;_________________ 050 CLA 051 ARCL 01 ; Output current 052 " " ; position 053 ARCL 07 054 ", " 055 ARCL 08 056 ", " 057 ARCL 09 058 AVIEW 059 RTN ;_________________ 060 LBL 21 061 RCL 07 062 X<>Y ; Test surrounding 063 X=Y? ; caves 064 AVIEW 065 RCL 08 066 X<>Y 067 X=Y? 068 AVIEW 069 RCL 09 070 X=Y? 071 AVIEW 072 RTN 073 LBL A ;_________________ 074 XEQ 14 075 FS? 00 ; Move 076 GTO 22 077 STO 01 078 GTO 09 079 LBL B ;_________________ 080 XEQ 14 ; Shoot 081 FS? 00 082 GTO 22 083 RCL 02 084 X=Y? ; Hit 085 GTO 11 086 XEQ 50 087 3 088 XEQ 99 089 7 090 + 091 RCL IND X 092 STO 02 ; New Wumpus 093 RCL 01 ; position 094 XEQ 50 095 LBL 09 ;_________________ 096 2.006 097 STO 10 098 RCL 01 099 LBL 08 ; Check current 100 RCL IND 10 ; position for 101 X<>Y ; dangers 102 X=Y? 103 GTO IND 10 104 ISG 10 105 GTO 08 106 GTO 20 ;_________________ 107 LBL 02 108 "CHOMP" 109 AVIEW ; eaten by Wumpus 110 RTN 111 LBL 03 ;_________________ 112 LBL 04 ; Fell into pit 113 "YYIIIEEEE. . ." 114 AVIEW 115 RTN 116 LBL 05 ;_________________ ll7 LBL 06 118 "SNATCH" ; Super bat move 119 AVIEW 120 20 121 XEQ 99 122 1 123 + 124 STO 01 125 "MOVED TO" 126 ARCL 01 127 AVIEW 128 PSE 129 GTO 09 ;_________________ 130 LBL 11 131 "GOT HIM" ; Shoot Wumpus 132 BEEP 133 AVIEW 134 RTN 135 LBL 14 ;_________________ 136 CF 00 137 RCL 07 ; Illegal cave 138 X=Y ? ; test 139 RTN 140 X<>Y 141 RCL 08 142 X=Y? 143 RTN 144 X<>Y 145 RCL 09 146 X=Y? 147 RTN 148 "ILLEGAL CAVE" 149 AVIEW 150 SF 00 151 RTN ;_________________ 152 LBL 99 153 RCL 00 ; Random number 154 9821 ; generator 155 * 156 .21137 157 + 158 FRC 159 STO 00 160 * 161 INT 162 RTN 163 LBL 50 164 CF 00 165 5 166 X<>Y 167 STO 10 168 X<=Y? 169 GTO 10 170 15 ; Determine which 171 X<>Y ; ring tbe cave is in 172 X<=Y? 173 GTO 11 ;_________________ 174 2 175 * 176 25 ; Find adjacent 177  ; caves for outside 178 STO 07 ; ring 179 21 180 RCL 10 181 1 182 + 183 16 184 RDN 185 X=Y? 186 roll up 187 STO 08 188 15 189 RCL 10 190 1 191  192 X=Y? 193 20 194 X=0? 195 RDN 196 STO 09 197 RTN ;_________________ l98 LBL 10 199 1 ; Find adjacent 200 + ; caves for inside 201 X>Y? ; ring 202 1 203 STO 07 204 RCL 10 205 1 206  207 X=0? 208 5 209 STO 08 210 RCL 10 211 2 212 * 213 4 214 + 215 STO 09 216 RTN ;_________________ 217 LBL 11 218 2 219 ÷ ; find adjacent 220 FRC ; caves for middle 221 X=0? ; ring 222 SF 00 223 25 224 RCL 10 225 FS? 00 226 4 227 FS? 00 228 CHS 229 CF 00 230 + 231 2 232 ÷ 233 STO 07 234 16 235 RCL 10 236 1 237 + 238 X=Y? 239 6 240 STO 08 241 5 242 RCL 10 243 1 244  245 15 246 RDN 247 X=Y? 248 roll up 249 STO 09 250 RTN 251 .END.
R00 Seed R01 Hunter R02 Wumpus R03 Pits R04 Pits R05 S. bats R06 S. bats R07 Adj. cave R08 Adj. cave R00 Adj. cave R10 Used R11 Used R12 Used
00 Used
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