Integrated full-screen flash engine for Practice + Examination, while preserving the V2.8 analysis tools.
Generate a preview using the current Digit and Row settings. Default engine uses values from 0 through 10^Digit − 1, with addition as the default operation.
Practice using the current Flash Mental Calculation settings.
It verifies the generated sequence, signs, running totals, final answer, digit range, row count, zero usage, negative totals, and carry/borrow events. It does not claim that these rules are identical to the legacy EXE until they are confirmed from the original.
1. Run the original program and record a sequence.
2. Paste the original sequence above.
3. Run the same settings in Engine Analyzer.
4. Compare zero frequency, duplicates, carry/borrow, signs, ranges, running totals and row count.
5. Repeated tests will reveal constraints used by the original difficulty engine.
Sample count, average final answer, average zero rate, negative-value rate, duplicate rate, carry rate, borrow rate, positive/negative operation mix, minimum/maximum running total, average number size, and observed digit distribution. Group tests by level to reveal how difficulty changes.
Important: These are observations, not yet the official 10th Kyu → 10th Dan algorithm. We need enough original samples before converting patterns into rules.
V2.8 rewards rules that are repeated across multiple tests, have a meaningful difference between groups, and are supported by more observations. Rules supported by only one test remain LOW confidence.
Candidate rules include digit size, zero rate, negative rate, duplicate rate, carry rate, borrow rate, average number size, final answer, running-total range, rows and interval.
Integrated V3.1 examination engine. Core Kyu/Dan parameters are based on the reverse-engineered original EXE.