Samurai Swords Battle Odds Calculator

Battle Setup

Forces And Conditions

Attacking Force

Defending Force

Event Cards Optional Rules ↗

Attacker Cards

Defender Cards

Special Defender Advantages Naval invasion first strike No castle Castle: +4 temporary spearmen Fortress: +5 temporary ronin

Monte Carlo Trials 10,000 50,000 100,000

Combat Report

Battle Results

Set up a battle, then run combat.

Attacker Capture --

Defender Hold --

Mutual Elimination --

Expected Replaceable Koku Swing --

Replaceable Koku Losses

Attacker expected loss: --
Defender expected loss: --
Net swing: --

Battle Length

First strike only: --
Ends in 1 round: --
Ends in 2 rounds: --
Ends in 3+ rounds: --

Battle Risk

Attacker fully lost: --
Defender fully lost: --
Positive replaceable trade: --
Capture + positive replaceable trade: --

Outcome Quality

Capture with 1 unit: --
Capture with 2 units: --
Capture with 3-4 units: --
Capture with 5+ units: --
Defender holds with 1 unit: --
Defender holds with 2+ units: --

About The Calculator

How The Samurai Swords Battle Odds Calculator Works

Choose the attacking and defending units, apply any battlefield conditions, and run thousands of simulated battles using the official combat sequence. The report estimates capture and hold odds, expected replaceable koku losses, battle length, and the quality of the surviving force.

Rules And Editions

The calculator supports every standard unit plus castles, fortresses, and naval-invasion first strikes. It applies equally to the game editions published as Shogun, Samurai Swords, and Ikusa.

Optional Event Cards

Add attacker or defender event cards to explore alternate battles, including first-strike effects, weather, temporary units, and adjusted combat rolls.

Need the turn sequence or setup rules? Open the Samurai Swords Quick Reference.