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This article is based on Logbook/ElectronicObserver battle rank detection algorithm, it is known to work well, but is incomplete (mainly in sinking conditions). For complementary info, see Template:VictoryConditions and wikiwiki article (merging required).
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Victory ConditionsEdit

For victory conditions for Air Raid Battles (空襲戦), see Events/Mechanics.

The rank of battles and PvP is evaluated as follows (in order, from top to bottom):

  • Perfect S (完全勝利, Total Victory)
    • All enemy ships sunk and no damage taken.
  • S (勝利, Victory)
    • All enemy ships sunk and no allied ships sunk.
  • A (勝利, Victory)
    • Required number of enemy ships sunk and no allied ships sunk. The required number is defined by enemy ships sunk >= 60% of enemy ships rounded: at least 1 out of 2, 2 out of 3, 2 out of 4, 3 out of 5, and 4 out of 6.
  • B (戦術的勝利, Tactical Victory)
    • The allied damage gauge is higher than 250% of the enemy damage gauge: allied damage gauge > 2.5 * enemy damage gauge.
      • The damage gauge is defined as an integer percentage: floor(100 * total damage dealt / initial opponent HP) or floor(100 * (initial opponent HP - final opponent HP) / initial opponent HP).
    • Otherwise, if no allied ships sunk:
      • Enemy flagship sunk.
    • Or if one or more allied ships sunk:
      • All enemy ships sunk.
      • Or enemy flagship sunk and number of allied ships sunk < number of enemy ships sunk.
  • C (戦術的敗北, Tactical Defeat)
    • The allied damage gauge is higher than 90% of the enemy damage gauge: allied damage gauge > 0.9 * enemy damage gauge.
    • Or, if one or more allied ships sunk, enemy flagship sunk and number of allied ships sunk lower than number of enemy ships sunk. (incomplete)
  • E (敗北, Defeat)
    • All allied ships sunk except the flagship in a fleet of 2 or more ships. (incomplete)
  • D (敗北, Defeat)
    • Otherwise.

NotesEdit

  • S, A, and B ranks are victory ranks, C, D, and E are defeat ranks.
  • B rank is the minimal rank required to clear a map without boss gauge, to score a victory in quests, or to obtain a drop from a node.
  • A rank or above is typically necessary for obtaining rare drops, while S rank usually gives better drops rates and can be required for some very rare drops.
  • It is possible to clear maps with boss gauges (e.g. 4-4, 5-3, or event maps) with a C rank if the enemy flagship is sunk.
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