logical-puzzles-cot

# Logical Puzzles CoT — Nemotron Reasoning Challenge Chain-of-thought training corpus for the NVIDIA Nemotron-3-Nano reasoning challenge. Each row has a `source` field for provenance: - **`source = huikang`** (7,830 rows): reasoning traces from Tong Hui Kang's publicly-shared competition corpus (`huikang/huikang-nemotron-repository-snapshot` on Kaggle), detokenized to text. All credit for these CoTs belongs to huikang. - **`source = codelion`** (5,330 rows): our own contributions — - earlier rejection-sampled logical-puzzle CoTs, and - **solver-generated concise CoTs** (`Gravity Solver`, `BitManip Solver`, `Unit Solver`): deterministic example-based solvers that produce short, genuine, correct reasoning to fix the 3584-token budget-truncation failure mode (efficiency distillation). Columns: `id, prompt, answer, type, generated_cot, source`.