Opus 13 Mystery Cache
-
Difficulty:
-
-
Terrain:
-
Size: 
(micro)
Please note Use of geocaching.com services is subject to the terms and conditions
in our disclaimer.
The cache is not at the posted coordinates.
Each of 13 puzzles contains 16 unknown values, represented by the letters A through P. Each number between a pair of letters is equal to the sum of those two letters. Determine the letter values for all 13 puzzles to reveal the final coordinates. The range of possible values and any ordering or correlation between values are left for the solver to discover. A text version is available here.
Puzzle 1
A
|
7
|
B
|
9
|
C
|
11
|
D
|
10
|
|
12
|
|
14
|
|
16
|
E
|
15
|
F
|
17
|
G
|
19
|
H
|
18
|
|
20
|
|
22
|
|
24
|
I
|
23
|
J
|
25
|
K
|
27
|
L
|
26
|
|
12
|
|
14
|
|
16
|
M
|
15
|
N
|
1
|
O
|
3
|
P
|
14
Puzzle 2
A
|
13
|
B
|
15
|
C
|
17
|
D
|
16
|
|
18
|
|
20
|
|
22
|
E
|
21
|
F
|
23
|
G
|
25
|
H
|
24
|
|
26
|
|
12
|
|
14
|
I
|
29
|
J
|
15
|
K
|
1
|
L
|
16
|
|
18
|
|
4
|
|
6
|
M
|
5
|
N
|
7
|
O
|
9
|
P
|
11
Puzzle 3
A
|
1
|
B
|
3
|
C
|
5
|
D
|
4
|
|
6
|
|
8
|
|
10
|
E
|
9
|
F
|
11
|
G
|
13
|
H
|
12
|
|
14
|
|
16
|
|
18
|
I
|
17
|
J
|
19
|
K
|
21
|
L
|
20
|
|
22
|
|
24
|
|
26
|
M
|
25
|
N
|
27
|
O
|
29
|
P
|
1
Puzzle 4
A
|
7
|
B
|
9
|
C
|
11
|
D
|
10
|
|
12
|
|
14
|
|
16
|
E
|
15
|
F
|
17
|
G
|
19
|
H
|
18
|
|
20
|
|
22
|
|
24
|
I
|
23
|
J
|
25
|
K
|
27
|
L
|
26
|
|
12
|
|
14
|
|
16
|
M
|
15
|
N
|
1
|
O
|
3
|
P
|
14
Puzzle 5
A
|
7
|
B
|
9
|
C
|
11
|
D
|
10
|
|
12
|
|
14
|
|
16
|
E
|
15
|
F
|
17
|
G
|
19
|
H
|
18
|
|
20
|
|
22
|
|
24
|
I
|
23
|
J
|
25
|
K
|
27
|
L
|
26
|
|
12
|
|
14
|
|
16
|
M
|
15
|
N
|
1
|
O
|
3
|
P
|
14
Puzzle 6
A
|
5
|
B
|
7
|
C
|
9
|
D
|
8
|
|
10
|
|
12
|
|
14
|
E
|
13
|
F
|
15
|
G
|
17
|
H
|
16
|
|
18
|
|
20
|
|
22
|
I
|
21
|
J
|
23
|
K
|
25
|
L
|
24
|
|
26
|
|
12
|
|
14
|
M
|
29
|
N
|
15
|
O
|
1
|
P
|
15
Puzzle 7
A
|
23
|
B
|
25
|
C
|
27
|
D
|
26
|
|
12
|
|
14
|
|
16
|
E
|
15
|
F
|
1
|
G
|
3
|
H
|
18
|
|
4
|
|
6
|
|
8
|
I
|
7
|
J
|
9
|
K
|
11
|
L
|
10
|
|
12
|
|
14
|
|
16
|
M
|
15
|
N
|
17
|
O
|
19
|
P
|
6
Puzzle 8
A
|
11
|
B
|
13
|
C
|
15
|
D
|
14
|
|
16
|
|
18
|
|
20
|
E
|
19
|
F
|
21
|
G
|
23
|
H
|
22
|
|
24
|
|
26
|
|
12
|
I
|
27
|
J
|
29
|
K
|
15
|
L
|
14
|
|
16
|
|
18
|
|
4
|
M
|
3
|
N
|
5
|
O
|
7
|
P
|
12
Puzzle 9
A
|
15
|
B
|
17
|
C
|
19
|
D
|
18
|
|
20
|
|
22
|
|
24
|
E
|
23
|
F
|
25
|
G
|
27
|
H
|
26
|
|
12
|
|
14
|
|
16
|
I
|
15
|
J
|
1
|
K
|
3
|
L
|
18
|
|
4
|
|
6
|
|
8
|
M
|
7
|
N
|
9
|
O
|
11
|
P
|
10
Puzzle 10
A
|
21
|
B
|
23
|
C
|
25
|
D
|
24
|
|
26
|
|
12
|
|
14
|
E
|
29
|
F
|
15
|
G
|
1
|
H
|
16
|
|
18
|
|
4
|
|
6
|
I
|
5
|
J
|
7
|
K
|
9
|
L
|
8
|
|
10
|
|
12
|
|
14
|
M
|
13
|
N
|
15
|
O
|
17
|
P
|
7
Puzzle 11
A
|
25
|
B
|
27
|
C
|
29
|
D
|
12
|
|
14
|
|
16
|
|
18
|
E
|
1
|
F
|
3
|
G
|
5
|
H
|
4
|
|
6
|
|
8
|
|
10
|
I
|
9
|
J
|
11
|
K
|
13
|
L
|
12
|
|
14
|
|
16
|
|
18
|
M
|
17
|
N
|
19
|
O
|
21
|
P
|
5
Puzzle 12
A
|
29
|
B
|
15
|
C
|
1
|
D
|
16
|
|
18
|
|
4
|
|
6
|
E
|
5
|
F
|
7
|
G
|
9
|
H
|
8
|
|
10
|
|
12
|
|
14
|
I
|
13
|
J
|
15
|
K
|
17
|
L
|
16
|
|
18
|
|
20
|
|
22
|
M
|
21
|
N
|
23
|
O
|
25
|
P
|
3
Puzzle 13
A
|
17
|
B
|
19
|
C
|
21
|
D
|
20
|
|
22
|
|
24
|
|
26
|
E
|
25
|
F
|
27
|
G
|
29
|
H
|
12
|
|
14
|
|
16
|
|
18
|
I
|
1
|
J
|
3
|
K
|
5
|
L
|
4
|
|
6
|
|
8
|
|
10
|
M
|
9
|
N
|
11
|
O
|
13
|
P
|
9
Validate your solution with certitude. Congratulations to first finder KfromCA.
Additional Hints
(Decrypt)
[Hide] Fnaqjvpurq orgjrra iregvpny naq ubevmbagny jnyy pbzcbaragf.