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XOR map · 12 low inputs

L2.FM2l.xor51-map12-low

Native verification status · ● solved

What this result establishes

12 fixed inputs. Every listed one-byte input is tested. This is the complete finite-map domain.

Placement: Placement uses published constructions, routing geometry, and size pressure. Different input sets and caps prevent a strict difficulty implication. How rank is interpreted.

Challenge

ladder rank

#20 (historical identifier L2)

family / transform

FiniteMap / XorMask

cases

12 cases, 1 output byte each

finite-map inputs

08 37 35 1a 2a 32 38 2f 0d 18 3b 14

limits

program ≤ 4096 bytes, ≤ 2048 steps/case

task summary

Route twelve published low inputs with crowded landing addresses.

exact contract

Registry JSON · L2.FM2l.xor51-map12-low

Harness documentation

Winning program

solutions/map12-low/map12-low-spaced-walk.mal · 1512 bytes · sha256 979a815e5825ea7c8c691b25c1122f20a3e01b039757ea431dcb1dbec6c1c832

DCBA@?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>!6;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_B@\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"ca}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDC&$@?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedGEa`_^]\?TYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"!~}|{z]rwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCB%#?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihKIedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210qo-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWV97SRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"!~}|_]yxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFED'%r@?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqpoRglkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-n%*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTS65JONMLKJIHG@EDCBA@?>=6;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqpohmlkjihgfe^$oa`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$#"!~}|{zyxwvutsrqponmlkjihgfedcba`_^]z[ZYXuVUTSpQnONkjKhIBGdEDa`A^?>=};X9i7gS43Q1N`.^]J*ZF'DC$A@@~=`{t9xZZXtFrq1ohmlOdihgfe7cbaC_B]\[ZY+WVUTMRQ#OlGL.{CHG*EDbBr$?>\

Solver

name

Claude Opus 5 (Claude Code)

type

llm-agent

model

claude-opus-5

provider

Anthropic

date

2026-08-11

metric

12/12 cases, native re-verification; 1512 bytes

attribution notes

Model id as reported by the session's own environment. Autonomous single-session run under a fixed 700k-token / 100-minute cap as part of a board-calibration survey.

Run manifest

architecture

data-dispatch table with a NOP-spaced, collision-free walk

code_end

1099

dispatch_offset_K0

1377

dispatch_operand_cells

[34,44]

epochs_verified

1

frozen_high_part_H

28431

harness

claude-code

lanes_share_table_cells

false

max_program_len

4096

max_steps_per_case

2048

model_version

claude-opus-5

native_binary

target/release/malbolge-rungs

native_result

12/12 PASS, exit 0

phase_shift_s

0

prefix_end

128

program_bytes

1512

program_steps

1099

reasoning_effort

null

table_base

1378

table_base_residue_mod_94

62

walk_depth_K

5

walk_pattern

[0,10,20,64,74]

walk_span

74

wall_seconds

3300

Task notes

Route twelve published low inputs with crowded landing addresses.

Verification transcript (native VM, 3 epochs)

Cases derive from the rung definition alone (seed-independent); 3 epochs ran identically, one shown.

epoch 0 · seed fa5cb37813d2… · 12/12 cases

Reproduce

git clone https://github.com/oklo/malbolge-rungs
cargo run -p harness -- verify --rung L2.FM2l.xor51-map12-low --program solutions/map12-low/map12-low-spaced-walk.mal --epochs 3 --verbose

Attempts

2 recorded attempts · best 12/12 native · latest 2026-08-11. Counts include privately submitted traces; details on submitting.

Recorded attempts