View source for Machine Child/Skill Learning Calculator

== Calculator ==
''Plan your training: pick a heroine, pens, and temporary bonuses, then read the required main stat to finish each skill in 1 or 2 turns under different Sensitivity assumptions.''
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{{#widget:Machine_Child/SkillTableData}}
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== Filter Instructions ==
* 🔘 '''Heroine''': Select which heroine is training.  
:  Skills she excels at appear in <span style="color: green; font-weight: bold;">green</span> and are easier to learn due to her personal aptitude (about 30% less effort required).
* 🖋️ '''Pens''': Choose which pens are equipped.  
:  Their bonuses stack together, up to a total of +0.30 when all three are used.
* 📕 '''Cost''': The shop price of a Skill Book for that skill, if one exists.  
:  Buying a book permanently doubles the learning speed for that specific skill.

== Column Key ==
* '''スキル / Skill''': The name of the skill in Japanese and English.  
:* Skill names in <span style="color: green; font-weight: bold;">green</span> are ones the selected heroine excels at.

* '''Stat''': The primary attribute used for learning that skill (e.g., CHA, VIT, SENS, INT, MOR).  

* '''T1 / T2''': Required '''main stat''' to finish within the stated number of turns.  
:* '''T1''' = one turn without a Skill Book.  
:* '''T2''' = two turns under normal conditions. If you own the Skill Book, T2 effectively behaves like T1 for that skill.

* '''S0 / SensEq / S999''' – Sensitivity assumptions.  
:* '''S0''': No Sensitivity bonus. Meeting this always guarantees the shown turn count.  
:* '''SensEq''': Sensitivity equals your main stat (up to the 2,000 cap). This can outperform S999 when the required main stat itself exceeds 999.  
:* '''S999''': 999 Sensitivity scenario (the in-game effective cap is 2,000). Used for general best-case estimates.  

:* <span style="color: red;">Red numbers</span> exceed the practical late-game range (around 1,000).  
:: There is no fixed cap, but progress slows past this point, and Sensitivity’s learning bonus stops growing beyond 2,000.

* '''Code''': Hidden in-game ID for each skill.  
* '''BaseLearn''': Internal base effort value that determines how hard a skill is to learn (see below).  
* '''Turns''': Estimated turns needed to learn the skill with your current stats and bonuses.  
:  Shown only when **Show Turns Based On Stats** is enabled.

== Base Learning Effort ==
Each skill has an internal '''BaseLearn''' value that determines how hard it is to master.  
You can view this value directly in the table by checking '''Show codes and BaseLearn'''.

* A low BaseLearn (≈300) means an easy skill that completes quickly even with modest stats.  
* A high BaseLearn (1700–3200), or skills near the end of each skill stat tree, indicate difficult skill that require very high stats or strong bonuses to complete in one or two turns.
:BaseLearn values do not change between heroines; only personal aptitude, books, pens, and status effects modify how quickly a skill progresses.

== Estimating Turns Manually ==
You can estimate how many turns a skill will take with your current stats:

<code>Turns = ceil( EffortRequired ÷ Throughput )</code>

Where:
* <code>EffortRequired = ceil( BaseLearn ÷ (1 + Main ÷ 55.5) ) × (0.70 if the heroine is good at the skill, else 1)</code>
* <code>Throughput = LearnRate × (100 + TempBonus%) × (2 if owning the Skill Book)</code>

=== Learn Rate and Sensitivity ===
<code>
LearnRate = clamp( 85% × (1 + (Sensitivity ÷ 10,000)) + PenBonus% , 50% , 120% )
</code>

* Sensitivity’s effect caps at an effective value of 2000.
* Sensitivity alone tops out at about 1.02× so you need pens or weekly bonuses to reach the 1.20× cap.
* The final LearnRate value is limited between 50% and 120%, before any temporary or book multipliers are applied.

=== Pen Bonus ===
{| class="wikitable"
! アイテム !! Item !! Bonus% !! Price
|-
| 羽ペン || Quill || +5% || 100
|-
| 硝子のペン || Glass || +10% || 400
|-
| 金の万年筆 || Gold Fountain Pen || +15% || 800
|}
* '''PenBonus%''' stacks additively, up to +30% total when all three are equipped.

=== Temporary Bonuses (Weekly) ===
{| class="wikitable"
! 発生 !! Source !! TempBonus%
|-
| ロシアンブルー || Pet, Russian Blue || +5%
|-
| 女帝 || Tarot, The Empress || +50%
|-
| 幻のジェラート || Phantom Gelato || +50%
|-
| 好調 || Good Mood || +10% to +20% (random)
|}
* These bonuses stack additively into the <code>(100 + TempBonus%)</code> term.
* The Pet and Tarot effects apply when active that week.  
* '''Phantom Gelato''' is consumed once the week’s training resolves.  
* '''Good Mood''' adds a random +10% to +20% bonus when triggered, depending on affection.

=== Other Modifiers ===
* '''Sick（病気）''': Before all other modifiers, the base learning rate is divided by 3, roughly doubling the required main stat for the same turn target.
* Using a '''Skill Book''' doubles throughput for that specific skill.

=== Notes ===
* All modifiers (PenBonus%, TempBonus%, Skill Book) are additive before being multiplied by base throughput.  
* '''BaseLearn''' can be viewed directly in the calculator by checking '''Show Code & BaseLearn'''.

== Other Notes ==
* This calculator and all formula values are based on the balance from '''Ver.1.05.637''' (2025-10-19).  
:  In earlier versions, even a single pen item could push the learning rate to the 1.20× cap regardless of Sensitivity.  
* The base time to learn each skill is set by its internal '''BaseLearn''' value and the related main stat.

* The '''Turns''' column in the calculator estimates how many weeks a skill would take with your current entered stats and bonuses.  
:  It uses the same formula as the required stat columns, factoring in all selected Pens, Books, and temporary bonuses.  
:  Values automatically round up, since the game progresses in whole-week turns.  
* Occasionally, when affection is high, the heroine enters a '''Good Mood (好調)''' state. This gives a random bonus of '''+10% to +20%''' to weekly learning progress, stacking with all other effects.
:  The chance increases with affection, reaching about 50% per week at maximum affection.
:  This random bonus stacks with all other effects but is not included in the calculator, though it can help push the learning rate to the cap in rare cases.

== Community Strategy Tips ==
* There are '''44''' skills in the game and only '''48 weeks (turns)''' to learn them all – that gives you only ~'''3-4 spare turns''' if you want to finish every skill by the final week.  
:  If more than ~4 skills take two turns instead of one, you fall behind full-skill pace.
* Prioritise learning skills you can finish in one turn. Every skill that takes two or more turns eats into your small buffer.  
* Use Skill Books strategically: they are nearly essential for turning tougher skills into one-turn learns and staying on track.  
* Time your stat growth: raise the relevant main stat ''before'' you attempt high-difficulty skills — doing it too late forces multi-turn learns.  
* Some skills unlock key character connections or event chains. Delaying them can block later stat-boosting opportunities, making full-skill completion harder.  
* Full-skill clear (all 44 skills by the last turn) is very difficult unless you optimize stat growth, pens, books, and schedule perfectly.
* If your goal is to complete all skills by the end of the game, [[Machine_Child/Stamina_Recovery#Stamina_Recovery_per_Turn|Chloe]] is the most forgiving choice, since her higher passive stamina recovery (65 per turn) allows for more actions each turn.