October 7, 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
• mara
• sable

drinks

• nectar
• plasma
• static

games

• cipher
• duels
• oracle

clues

1. codename brisk is the cipher player.
2. the duels player is the nectar drinker.
3. codename mara is the duels player.
4. the plasma drinker is codename brisk.
5. the cipher player does not sit in seat 2.
6. the nectar drinker sits in seat 1.

question

Which seat (1-3) does codename sable occupy?

Instructions

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

seating

• seat

  1

  name

  mara

  drink

  nectar

  game

  duels

• seat

  2

  name

  sable

  drink

  static

  game

  oracle

• seat

  3

  name

  brisk

  drink

  plasma

  game

  cipher

initial Registers

a

6

b

2

c

0

program

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

final Registers

a

-1

b

-1

c

4

Puzzle

R R F9 F4 U U U F9 R F2 F6 F3 R

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

• R → 0,0,e
• R → 0,0,s
• F9 → 0,-9,s
• F4 → 0,-13,s
• U → 0,-13,n
• U → 0,-13,s
• U → 0,-13,n
• F9 → 0,-4,n
• R → 0,-4,e
• F2 → 2,-4,e
• F6 → 8,-4,e
• F3 → 11,-4,e
• R → 11,-4,s

Puzzle

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

Inputs

A

1

B

1

C

1

D

0

Instructions

Evaluate the circuit. Answer 1 or 0.

expression

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

Puzzle

4, 17, 56, 173, 524, ?

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

  klobsho

  output

  kohsbolk

• input

  ajpamc

  output

  acmapja

• input

  nwcvvmk

  output

  nkmvvcwn

query

qaltu

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

5a6d463061473974

Layers

• base64
• hex

Instructions

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