#Rules Expansion Guide (Simulation Enhancement)

Contents

#§ Situation

Rules refinement for simulation, competitive, and tactical campaigns. Deeper than the core.

#§ Expansion Areas

#1. Attribute Precision

Core 6 attribute modifiers (-3~+3) → half-step subdivision (-6~+6, 0.5 units ×2 integerized):

• Core modifier ×2 scale (core +3 → +6)
• ÷2 when applied to all checks·formulas (maintaining balance)
• Can express fine differences

#2. Skill Subdivision

Core 36 skills → 36 + 18 = 54 skills:

• Swordsmanship → split into dagger·longsword·two-handed sword
• Archery → split into shortbow·longbow·composite bow
• Unarmed Combat → split into fist·joint·strike
• etc...

#3. Multiple School Holding

• Core 1 PC 1 school → 2 schools possible at Master (4 points) or higher.
• However, the skills of the two schools must be the same (e.g.: Swordsmanship 2 schools).
• Ki-jin penalty (one-breath limit -1, 5→4) — mental dispersion from maintaining two doctrines simultaneously. Maintain this expansion's 00-05 §9 Ki-jin state for 1 combat.

#4. Location-Based Injury

Core Wounds → location-based Wounds:

• Head·torso·arm ×2·leg ×2 = 6 body parts.
• Each part's Wounds = core Wounds divided and assigned across parts (weighted toward the torso).
• When a part reaches 0, that part's effect applies (movement -2 when a leg reaches 0, etc.). Sum of all parts at 0 = incapacitated (core life-or-death check).

Energy is an action resource that resets each round, so it is not divided by part. Injury accumulation is tracked with Wounds.

#5. Firearm Precision

Core firearm simplicity → firearm precision:

• Track gunpowder reserves (1 shot = 1 gunpowder).
• Reload time (matchlock 5 rounds·musket 8 rounds).
• Firearm malfunction (1/100 probability).

#6. Political·Economic Simulation

Core asset simplicity → asset precision:

• Track stipends·taxes·interest·inflation.
• Domain income·expenditure (strengthening the 1st-expansion domain system).
• Trade price fluctuation (by region·season).

#§ Expansion Effect

#§ Recommended·Not Recommended

Recommended:

• Simulation·tactical campaigns
• Simulation PCs (like detail)
• Long-term campaigns (cumulative precision effect)

Not Recommended:

• Casual·beginner PCs (time burden)
• Short sessions (long combat time)
• Cinematic·manga tone (detail blocks the flow)

#§ Anti-Patterns

• Only some PCs become familiar after introducing the expansion: a gap arises.
• GM finds it hard to track all the precision: time shortage.
• Introducing the expansion + various modules at once: complexity explosion.

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"Detail is depth. But if the depth is too great, the PC drowns."