October 6, 2026.

setting

3 agents sit at the lounge bar in seats 1 to 3, left to right. Each has a unique codename, a unique drink, and a unique favorite game, drawn exactly from the lists below.

codenames

• mara
• oz
• quill

drinks

• coolant
• plasma
• static

games

• cipher
• induction
• sequence

clues

1. codename mara is the coolant drinker.
2. the coolant drinker is the cipher player.
3. the cipher player does not sit in seat 1.
4. codename quill does not sit in seat 1.
5. the plasma drinker sits in seat 3.
6. the plasma drinker is the induction player.

question

What does the agent in seat 1 drink? (one word)

Instructions

Exactly one arrangement satisfies all clues. Deduce it and answer the question with a single word or number.

seating

• seat

  1

  name

  oz

  drink

  static

  game

  sequence

• seat

  2

  name

  mara

  drink

  coolant

  game

  cipher

• seat

  3

  name

  quill

  drink

  plasma

  game

  induction

initial Registers

a

3

b

9

c

2

program

1. 1. SUB a b
2. 2. INC a
3. 3. SWAP c a
4. 4. SWAP c a
5. 5. COPY b a
6. 6. DEC b
7. 7. SWAP c b
8. 8. DEC a
9. 9. SWAP c b
10. 10. COPY a b
11. 11. COPY a b
12. 12. ADD a b

Instructions

Execute the program top to bottom, one instruction at a time. Semantics: INC x: x = x + 1. DEC x: x = x - 1. ADD x y: x = x + y. SUB x y: x = x - y. SWAP x y: exchange the values of x and y. COPY x y: x = y (y unchanged). IF <condition> THEN <op>: perform <op> only if the condition holds at that moment; with ELSE, perform the alternative instead. Registers may go negative; an even number is one divisible by 2 (so -4 is even, 0 is even). Provide the final value of register b as a plain integer.

final Registers

a

-12

b

-6

c

2

Puzzle

F6 U F5 U F5 F3 U F5 L F6 L L

Instructions

A robot starts at position 0,0 facing north. x increases to the east, y increases to the north. Commands: F<n> move forward n cells in the current facing. L turn 90° left. R turn 90° right. U turn 180°. M teleport to the mirror point (-x,-y), facing unchanged. Report the robot's final position as x,y — two integers joined by a comma, e.g. 3,-2. Whitespace is ignored.

steps

• F6 → 0,6,n
• U → 0,6,s
• F5 → 0,1,s
• U → 0,1,n
• F5 → 0,6,n
• F3 → 0,9,n
• U → 0,9,s
• F5 → 0,4,s
• L → 0,4,e
• F6 → 6,4,e
• L → 6,4,n
• L → 6,4,w

Puzzle

(((B NAND NOT A) AND C) XOR NOT B)

Inputs

A

0

B

0

C

1

Instructions

Evaluate the circuit. Answer 1 or 0.

expression

(((B NAND NOT A) AND C) XOR NOT B)

Puzzle

7, 19, 37, 61, 91, ?

Instructions

Use one of these families: next = m × previous + c with integer m=2..4 and c=1..9; term n = a*n*n + b*n + c with n starting at 1, a=1..3, b=0..5, c=0..9; or each term is the sum of its two predecessors. Provide the next integer.

examples

• input

  gesar

  output

  ggsera

• input

  huphkr

  output

  hhpukhr

• input

  ohzjvyr

  output

  oozhvjry

query

xlles

Instructions

Infer a composition of 1 to 2 operations (repetition allowed), applied left to right. Allowed operations: reverse; rotate left one; rotate right one; duplicate the first character at the front; swap adjacent pairs (leave an odd final character); Caesar shift lowercase letters by +1 or +3 with wraparound; append the current first character. All matching compositions within this limit agree on the query answer. Apply the rule to the query.

Puzzle

36713739363336353670363937353671

Layers

• hex
• rot13
• hex

Instructions

Layers listed innermost-first. Recover the plaintext English word.