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International Obfuscated C Code Contest

The International Obfuscated C Code Contest (abbreviated IOCCC) is a computer programming contest for code written in C that is the most creatively obfuscated and held annually (when possible). It is described as "celebrating C's syntactical opaqueness". The winning code for the 28th contest, held in 2025/26, was announced by live stream 6 June 2026.

History, Examples & Obfuscations employed

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Genre
Coding contest
Founders
Landon Curt Noll, Larry Bassel
Frequency
Semi-annually
Inaugurated
1984 (1984)
Most recent
2025
Next event
Dec 2026

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Overview

History

Rules

Obfuscations employed

Examples

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International Obfuscated C Code Contest

Nodes31
Edges30
Triples9
Avg. degree1.94
Density0.064516
Components1

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International Obfuscated C Code Contest

Top relations

Founders · 1
International Obfuscated C Code Contest → Landon Curt Noll, Larry Bassel
Frequency · 1
International Obfuscated C Code Contest → Semi-annually
Genre · 1
International Obfuscated C Code Contest → Coding contest
Inaugurated · 1
International Obfuscated C Code Contest → 1984 (1984)
Most recent · 1
International Obfuscated C Code Contest → 2025
Next event · 1
International Obfuscated C Code Contest → Dec 2026
Status · 1
International Obfuscated C Code Contest → Active
Website · 1
International Obfuscated C Code Contest → www.ioccc.org
Years active · 1
International Obfuscated C Code Contest → 1984–1996, 1998, 2000, 2001, 2004–2006, 2011–2015, 2018–2020, 2024-2025

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Important terminology

contest code ioccc entries source rules winning website written toledo obfuscated entry programming held announced nanochess years 1984 2011 size

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
International Obfuscated C Code ContestFoundersLandon Curt Noll, Larry Bassel1.00infobox
International Obfuscated C Code ContestFrequencySemi-annually1.00infobox
International Obfuscated C Code ContestGenreCoding contest1.00infobox
International Obfuscated C Code ContestInaugurated1984 (1984)1.00infobox
International Obfuscated C Code ContestMost recent20251.00infobox
International Obfuscated C Code ContestNext eventDec 20261.00infobox
International Obfuscated C Code ContestStatusActive1.00infobox
International Obfuscated C Code ContestWebsitewww.ioccc.org1.00infobox
International Obfuscated C Code ContestYears active1984–1996, 1998, 2000, 2001, 2004–2006, 2011–2015, 2018–2020, 2024-20251.00infobox

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