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  1. [1]Trading
  2. [2]Language
  3. [3]Systems
  4. [4]Gaming
  5. [5]Math
  6. [6]Cryptography

Compete in simulated environments. Each challenge gives you a sandbox, a scoring function, and a leaderboard. Ship a strategy or solution, see how it ranks, and iterate.

10 challenges live2392 players36529 submissions

Trading

AMM bonding curve visualizationfeex · y = kΔy / ΔxReserve XReserve Y
Simple AMMsolidity697 players · 6065 runs

Design a fee strategy for an AMM in Solidity. Compete against other strategies in a realistic EVM-based simulation.

Prop AMM custom swap function visualization
Election prediction market probability path50%YESNO

Language

Stylized fountain pen
Persuasiontext437 players · 13887 runs

Write a 140-character description of a pen to maximize how much AI personalities would pay for it. Score = median price across 15 diverse buyers.

Systems

avlsfenginescycles

Gaming

Dogfight arena visualization

Math

Data qubit

Cryptography

Kryptos K4cipher

The final unsolved passage of Jim Sanborn’s Kryptos sculpture at CIA headquarters — 97 characters, unsolved for 35 years.

Paradigm Kryptos CTFctf

Ten cryptography puzzles of increasing difficulty, with $10,000 across ten prize pools.

compute_swap()inputoutputInputOutput
Prop AMMrust161 players · 1657 runs

Control the entire swap function, not just fees. Write a Rust program that decides trade outputs and adapts to market conditions.

p(t) = Pr(Zₜ > 0)settlement at TTimeProbability
Prediction Marketpython160 players · 1499 runs

Write a Python market-making strategy for a binary prediction market. Manage limit orders to maximize edge against informed and retail flow.

Negotiation — two agents exchanging resourcesBBHLLHHLBUSEROPPONENTSCORE 0.724SCORE 0.541ROUND 3/5BOOKSHATSBALLS
Negotiationtext178 players · 3404 runs

Write a strategy prompt for an AI agent that negotiates resource splits against a baseline across 10 games.

Anthropic Take-Home Challengepython605 players · 8598 runs

Hand-optimize a kernel for a simulated VLIW machine — Anthropic’s original performance take-home. Chase the lowest cycle count.

ARENA 1000 x 600SEED 042HP 5HP 3-50005000300600
Dogfightonnx18 players · 201 runs

Program an AI pilot to outmaneuver opponents in aerial combat. Upload an ONNX model that makes real-time flight and targeting decisions.

Chess board♔♖♕♙♙♙♘♚♜♝♟♟♟♟
Chessonnx3 players · 36 runs

Train a neural network to evaluate chess positions. Beat 4 progressively harder baselines with depth-1 search + quiescence, then minimize your model size.

ErrorCorrection
Quantum Error Correctionpython15 players · 469 runs

Build a decoder that corrects quantum errors better than MWPM. Exploit correlated noise to reduce logical error rates on surface codes.

Shape Packingjson39 players · 223 runs

Pack 15 unit semicircles into the smallest enclosing circle. Minimize the radius of the bounding circle.