October 4, 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

• brisk
• quill
• vex

drinks

• coolant
• nectar
• voltage

games

• cipher
• induction
• logic

clues

1. the cipher player does not sit in seat 3.
2. the cipher player is the coolant drinker.
3. codename brisk is the coolant drinker.
4. the nectar drinker sits immediately left of codename quill.
5. the induction player sits in seat 2.

question

What does the agent in seat 2 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

  brisk

  drink

  coolant

  game

  cipher

• seat

  2

  name

  vex

  drink

  nectar

  game

  induction

• seat

  3

  name

  quill

  drink

  voltage

  game

  logic

initial Registers

a

2

b

6

c

8

program

1. 1. INC a
2. 2. SWAP b c
3. 3. DEC b
4. 4. DEC a
5. 5. COPY a c
6. 6. SWAP a b
7. 7. ADD c b
8. 8. DEC a
9. 9. COPY c 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 c as a plain integer.

final Registers

a

6

b

6

c

6

Puzzle

U F3 F3 U F9 F6 L L L L R F6

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

• U → 0,0,s
• F3 → 0,-3,s
• F3 → 0,-6,s
• U → 0,-6,n
• F9 → 0,3,n
• F6 → 0,9,n
• L → 0,9,w
• L → 0,9,s
• L → 0,9,e
• L → 0,9,n
• R → 0,9,e
• F6 → 6,9,e

Puzzle

(((C OR NOT A) NAND A) XOR C)

Inputs

A

1

B

1

C

1

Instructions

Evaluate the circuit. Answer 1 or 0.

expression

(((C OR NOT A) NAND A) XOR C)

Puzzle

3, 3, 6, 9, 15, 24, ?

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

  oqeiqgn

  output

  ongqieq

• input

  wwjqen

  output

  wneqjw

• input

  wdmnv

  output

  wvnmd

query

nbcnk

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

dGV2bGV2

Layers

• rot13
• reverse
• rot13
• base64

Instructions

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