Verdict: If both variants were equally widespread, current reasoning and early engine tests suggest Michaelic Chess is superior overall — fairer color balance, richer live tactical play, and cleaner design with one elegant change.
1) Opening Theory & Tactical Richness
Classical: dominated by deep opening prep and memorized theory.
Michaelic: the sideways‑pawn option disrupts fixed tabiyas, making on‑board calculation and creativity matter more from move one.
Advantage: Michaelic
2) Fairness & First‑Move Edge
Classical: well‑documented white bias (~55–57% at expert/engine conditions).
Michaelic: 1,000‑game self‑play study found outcomes near 50/50 (∆ white expected score ≈ +0.001).
Advantage: Michaelic
3) Strategic Depth vs Complexity
Classical: deep but often channels into memorized complexities.
Michaelic: keeps classical depth while adding new motifs (lateral pawn chains, flexible repairs, dynamic breaks).
Advantage: Michaelic
4) Philosophical & Cultural Fit
Classical: venerable but can become ossified.
Michaelic: designed for fairness, adaptability, and intellectual honesty; encourages a culture of creative problem‑solving.
Advantage: Michaelic
5) Empirical & Theoretical Outlook
Classical: approaching solvability constraints with modern engines.
Michaelic: young but balanced; fertile ground for organic theory growth without legacy constraints.
Advantage: Michaelic
How to Cite the Variant
“Michaelic Chess — classical rules with a single change: pawns may move one square sideways to an empty square (no sideways captures). Early engine self‑play indicates near‑perfect color balance.”