World 1
| Strategy Name | 近海警備 (Coastal Waters Defense)
| ||
| Difficulty | ☆
| ||
| Item | None
| ||
| Strategy Content | 鎮守府正面近海の警備に出動せよ！
Mobilize for a patrol of the waters outside the naval base! | ||
| 1-1 Branching Rules | ||
|---|---|---|
| Nodes | Rules | |
A |
B |
|
C |
| |
Tip
- This map is commonly used for sparkling ships.
- This entails running the ship you want sparkled in the flagship position. Sometimes this is done alone, which minimizes MVP-theft (a rare problem); however, more commonly two fodder ships (destroyers picked up from 1-1 while you are sparkling) are placed in the second and third slots to minimize the chances of enemy vessels scratching your flagship. They are not refueled, and are scrapped or used as modernization fodder once they can no longer be deployed.
- While this is a short, relatively harmless map, the HTML 5 update has made it so that single ships have an 80% chance of reaching the boss node, and 2 ships has a weighed chance of reaching the boss node as well. While this can be useful for completing Bw1, you will need to organize a group of multiple ships to help prevent your sparkle ships (the ships which will take up the flagship position) from getting hit at the boss node.
- You are recommended to sparkle ships (for expeditions or to improve thier performance in battle) while completing this.
Nodes and Enemy Encounters
| Nodes and Enemy Encounters | |||||
|---|---|---|---|---|---|
| Node | Pattern | Xp | Node Info | Form | Air |
| A 敵偵察艦 Enemy Reconnaissance Ship | Pattern 1 | 10 |  |  | |
| Pattern 2 | 15 |  | | ||
| Pattern 3 | 20 |  | | ||
| B 敵はぐれ艦隊 Stray Enemy Fleet | Pattern 1 | 20 | | | |
| Pattern 2 | 30 | | | ||
| Pattern 3 | 40 | | | ||
| C 敵主力艦隊 Main Enemy Fleet | Pattern 1 | 50 |  | | |
| Pattern 2 | 60 | | | ||
| Pattern 3 | 70 | | | ||
Drops
World 1-2: 南西諸島沖 Sea around the Nansei Islands
| Strategy Name | 南西諸島沖警備 (Nansei Islands Sea Defense)
| ||
| Difficulty | ☆
| ||
| Item |  | ||
| Strategy Content | 南西諸島沖に接近する敵前衛艦隊を捕捉、迎撃せよ！
Intercept the enemy's vanguard fleet in the seas off the Nansei Islands! | ||
| 1-2 Branching Rules | ||
|---|---|---|
| Nodes | Rules | |
| Start | A |
|
B |
| |
A |
D |
|
E |
| |
Nodes and Enemy Encounters
| Nodes and Enemy Encounters | |||||
|---|---|---|---|---|---|
| Node | Pattern | Xp | Node Info | Form | Air |
| A 敵前衛艦隊 | Pattern 1 | | | ||
| Pattern 2 | | | |||
| Pattern 3 |  | | |||
| Pattern 4 | | | |||
| Pattern 5 | | | |||
| B Resource Node | Pattern 1 | + 10 15 40 | |||
| C 敵前衛艦隊 | Pattern 1 | | | ||
| Pattern 2 | | | |||
| Pattern 3 | | | |||
| Pattern 4 | | | |||
| Pattern 5 | | | |||
| D 敵水雷戦隊 | Pattern 1 | | | ||
| Pattern 2 | | | |||
| Pattern 3 | | | |||
| Pattern 4 | | | |||
| Pattern 5 | | | |||
| Pattern 6 | | | |||
| E 敵主力艦隊 | Pattern 1 | | | ||
| Pattern 2 |  | | |||
| Pattern 3 | | | |||
| Pattern 4 | | | |||
| Pattern 5 | | | |||
Drops
World 1-3: 製油所地帯沿岸 Coastal Refinery Zone
| Strategy Name | 海上護衛作戦 (Maritime Escort Operation)
| ||
| Difficulty | ☆ ☆
| ||
| Item |  | ||
| Strategy Content | 製油所地帯沿岸部の海上輸送ラインを防衛せよ！
Protect the supply lines around our coastal refineries! | ||
Stage Guide
| 1-3 Branching Rules | ||
|---|---|---|
| Nodes | Rules | |
| Start | A |
|
B |
| |
A |
D |
|
E |
| |
F |
H |
|
J |
| |
H |
G |
|
I |
| |
J |
| |
Oil Refinery Farming
Composition
1 AV, 4-5 D, 0-1 SS (recommended for beginners)
Kamoi, 4-5 DD, SS (Luigi Torelli recommended) (preferred approach for guaranteed pathing to node D)
Equipment
Drum Canister and Daihatsu type equipment
The Oil Refinery area is now the new hot spot for farming for since the former "Orel Cruise" has become insufficient due to the increase difficulty subs will face on 2-3. As such Node D of this map now serves as a major area to farm for fuel.
- The above mentioned composition will allow you to reach Node D always.
- Node D will provide you with with a base amount of 10/15/20
- In addition to this, each
and 
you equip will give the following bonuses:
- +2 per
- +3 per
- +2
- Node D will provide you with with a base amount of 10/15/20
- With enough and it can become possible to gain a large amount of resources if you make constant trips to this spot.
- Once you complete your first battle, return to your base and refuel your fleet before going back out again.
- If done correctly, this can result in an alarming fuel gain that can end up possibly surpassing any fuel base expedition making this become the ideal location to farm for fuel.
- If you us throwaway DDs, remember to remove thier Drum Canister once they run out of fuel and ammo or are critically damaged before scraping them before proceeding to replace them with another DD that will use the Drum Canisters to run the map to continue the cycle.
Nodes and Enemy Encounters
| Area | Pattern | Encountered vessels | Formation |
|---|---|---|---|
| A 敵前衛艦隊 |
Pattern 1 |  
|
|
| Pattern 2 | 
| ||
| Pattern 3 |  
| ||
| B | Maelstrom: -8 -10 -14 -15 -20
| ||
| C | + 10 15 30
| ||
| D | + 10 15 25 30
| ||
| E 敵前衛艦隊 |
Pattern 1 |
|
|
| Pattern 2 |
| ||
| F 敵支援艦隊 |
Pattern 1 | 
|
|
| Pattern 2 |
|
| |
| Pattern 3 | 
| ||
| G 敵主力艦隊 |
Pattern 1 | 
|
|
Drops
World 1-4: 南西諸島防衛線 Nansei Islands Defense Line
| Strategy Name | 南1号作戦 (First Southern Operation)
| ||
| Difficulty | ☆ ☆ ☆
| ||
| Item |   | ||
| Strategy Content | 南西諸島の防衛ライン上の敵侵攻艦隊を捕捉、全力出撃でこれを撃滅せよ！
An enemy invasion fleet is pressing on the defensive line in the Nansei Islands. Sail out in full force and destroy them! | ||
| 1-4 | ||
| Fleet | ||
| Route | ||
| Other Notes | ||
| AP | AS | AS+ |
| 14 | 30 | 60 |
Stage Guide
This is the first map in which the enemy fleets possess carriers (with at least one node of carriers in every route); if you do not bring your own carriers, your ships must deal with aerial bombing prior to being able to counter-attack during the shelling phase(s). You have a few ways to deal with enemy carriers:
- Ignore the enemy carriers' bombing, which is possible with durable ships (at least CLs, preferably CAs or higher);
- Bring a submarine-only fleet (likely from construction as there are no submarine drops between 1-1 and 1-4) as only enemy CL and DDs can attack submarines; or
- Bring your own carriers, which can be obtained through either remodeling Chitose and/or Chiyoda at Level 15 to CVL or through normal construction.
The third method will also help in completing the quest chain which rewards Akagi: A11 (have a CV(L) and 3 destroyers in your second fleet) and B10 (sink an enemy carrier).
Tips
- This map is convenient for completing Bw2, preferably with a fleet of three subs. The diamond formations here hurt them far less than those in 2-2.
Nodes and Enemy Encounters
| Area | # | Encountered vessels | Form | Air |
|---|---|---|---|---|
| A 敵偵察艦隊 |
1 |
|
|
|
| 2 |
|
|
||
| 3 |
|
|||
| 4 |
|
|||
| B 敵偵察艦隊 |
1 |
|
|
|
| 2 |
|
|||
| 3 |
|
|
||
| C | + 10 15 20
| |||
| D | + 10 15 20
| |||
| E 敵前衛艦隊 |
1 | 
|
| |
| AS+ 48 | ||||
| AS 24 | ||||
| 2 |
| |||
| AS+ 48 | ||||
| AS 24 | ||||
| F 敵機動部隊 |
1 |  
|
| |
| AS+ 54 | ||||
| AS 27 | ||||
| 2 |
| |||
| AS+ 60 | ||||
| AS 30 | ||||
| G | + 10 15 20
| |||
| H | + 10 15 20
| |||
| I 敵前衛艦隊 |
1 |
|
| |
| AS+ 48 | ||||
| AS 24 | ||||
| 2 |
| |||
| AS+ 48 | ||||
| AS 24 | ||||
| J 敵支援艦隊 |
1 |
|
|
|
| 2 |
|
|||
Drops
| Strategy Name | 鎮守府近海対潜哨戒 (Anti-submarine Patrol in Seas Near the Naval Base)
| ||
| Difficulty | ☆ ☆ ☆ ☆ ☆
| ||
| Item | None
| ||
| Strategy Content | なるべく小編成の対潜哨戒部隊を編成し、鎮守府近海に出没する敵潜水艦を捜索。これを捕捉制圧、近海の安全な航行を実現せよ！
Form a small anti-submarine patrol fleet, discover and suppress the enemy submarines deployed in seas near the naval base! | ||
Stage Guide
Clearing this map gives you 75 points and a medal. At the beginning of each month, the boss HP bar will be reset, thus allowing you to obtain the medal and bonus points again.
- Unlike quests, the time limit for all Extra Operation is 11:59 PM JST on the last day of the month. Defeating the enemy flagship after the time limit will not count towards either the previous month or the next month.
- If the HP bar did not reset for you, re-logging into the game typically will fix the problem.
- Enemy fleets along the route to boss are composed purely of submarines.
- At various HQ level thresholds, enemy compositions will increase in difficulty, but if you train a fleet of Destroyers, Light Curisers and Escorts and maintain strong ASW equipment it should be manageable.
- Using Isuzu Kai Ni or any DD/CL that has ASW stats that go over 100, or DE that has an ASW of 60 or higher will allow them to perform a Pre-emptive ASW attack, which can be very helpful on this map. It can easily turn this map to your advantage for the most part.
- At various HQ level thresholds, enemy compositions will increase in difficulty, but if you train a fleet of Destroyers, Light Curisers and Escorts and maintain strong ASW equipment it should be manageable.
Tips
- Branching Rules
- To reach the boss, a fleet of no more than 4 ships is required.
- A fleet with 3 or fewer ships disallows the choice of formations (defaulting to Line Ahead), which has a low modifier for ASW damage. Therefore, it is critical that exactly 4 ships are deployed.
- More than 2 CL (not CT or CLT) will route you to F (from C).
- Having more than 4 ships will send you to D (from B); there is a path from D to I but it apparently requires 4 or fewer ships.
- Thus D -> I is only possible if you lose enough ships to then have 4 or fewer ships left.
- 1 CVL, CAV, AV or Akitsu Maru is needed to have a direct route to the boss node without the risk of hitting a dead end node.
- The enemies on the map is scaled to your admiral level, which means that the enemy may rank up when you hit certain admiral levels (40 and 80).
- Nodes F and G consist of very strong enemies, even after being adjusted to your admiral level. Make sure you satisfy the fleet requirements above and have at least 1 DD or 1 CL in order to reach the boss safely.
- Recommended Compositions
- 1CVL, 1 BBV, 2 DD/CL- recommended for beginners.
- Equipping the Saiun to the CVL will minimize the chance of Crossing the T - Disadvantage
- At least 1 BBV is highly recommended as it is capable of performing ASW while also granting you a second shelling phase.
- If you happen to own Taiyou, she is highly recommended for this map as she's the only light carrier capable of fighting submarines efficiently.
- At Kai, she's capable of Pre-emptive ASW attack using any ASW plane, making her the most resourceful light carrier to take out submarines on that map.
- If you do not own Taiyou, any other CVL can work, but their damage output will be limited in comparison to her's.
- 2-4 DD/DE, 0-2 CL capable of Pre-emptive ASW attack is recommended for experienced players since the DD and CL will be able to perform two rounds of ASW attacks without the need for a BBV (useful if you want to save your resources).
- Do not use more than 2 CL (CT and CLT don't count as CLs) in your composition if you are attempting the above set-up, or you will get routed to I.
- DE can be used in place of DDs for this map and are economically efficient for your resources in the process.
- A full fleet of 4 DE will take a slightly different path (with easier sub enemies) over other compositions, but will still reach the boss node
- Sparkling
- This map can now also double for Flagship Sparkling for any DD / CL, preferably with Pre-emptive ASW attack.
- Recommended Sparkling Fleet: 1 DD/CL with ASW equipment (Pre-emptive ASW attack is preferred, but not essential) as Flagship + 2-3 throwaway LV 1 DDs + Any other throwaway ships
- By doing this, you can basically sparkle your DD while taking far less damage, aside from the occasional bad targeting roll.
- Critically, this levelling method works best after level 80, as throwaway destroyers without ASW equipment are unable to defeat the armor of the most subs on the map, guaranteeing your flag an MVP.
- Most importantly, by covering three nodes, you gain far more morale per node than you would from sparkling at 1-1.
- If you plan to use throwaway DDs, be sure to not use DDs you plan to keep/train since you are likely to choose to scrap them afterward the sparkling process.
Nodes and Enemy Encounters
| Area | Admiral Level | # | Encountered vessels | Form |
|---|---|---|---|---|
| A 敵偵察潜水艦 |
79 and below | 1 | 
|
|
| 80 and above | 2 | 
|
| |
| B 敵潜水艦隊A群 |
39 and below |
1 |
|
|
| 40 to 79 | 2 |
|
| |
| 3 |
|
| ||
| 80 and above | 4 |
|
| |
| C 敵潜水艦隊C群 |
39 and below | 1 | 
|
|
| 40 to 79 | 2 | 
|
| |
| 80 and above | 3 |
|
| |
| D 敵潜水艦隊B群 |
Level 49 | 1 |
|
|
| Level 99 | 2 |
|
| |
| E | "Must be my imagination" (battle avoided) | |||
| F 敵侵攻打撃艦隊A群 |
1 |   
|
| |
| 2 |   
|
| ||
| G 敵侵攻打撃艦隊B群 |
Level 39 and below | 1 |  
|
|
| Level 40 to 79 | 2 |
|
| |
| Level 80 and above | 3 |  
|
| |
| H | "Must be my imagination" (battle avoided) | |||
| I 敵通商破壊主力艦隊 |
39 and below | 1 |
|
|
| 40 to 79 | 2 | 
|
| |
| 80 and above | 3 | 
|
| |
Drops
Notes
Akashi will drop with a small chance in 1-5 only for Admirals who have do not have her in your base. If you already have her, she will not drop in this map anymore. However, Akashi is still obtainable in maps like 3-5 or 6-2.
| Strategy Name | 輸送船団護衛作戦 (Convoy Escort Operation)
| ||
| Difficulty | ☆ ☆ ☆ ☆ ☆ ☆
| ||
| Item | | ||
| Strategy Content | 対潜及び防空能力に優れた艦艇を基幹戦力とした艦隊を編成、輸送船団航路の護衛にあたれ！
Form a fleet consisting of ships with excellent anti-submarine warfare and anti-aircraft capabilities, and protect the transport ship routes! | ||
| 1-6 North | ||
| Fleet | ||
| Route | ||
| Other Notes | Assuming highest AS formations | |
| AP | AS | AS+ |
| 67 | 150 | 300 |
Stage Guide
| Branching Rules | ||
|---|---|---|
| Node | Split | Condition |
| START | A | CL≤1 and DD≥4 and no other ship classes; Weighted Random towards A for all other DD+CL only fleets; Random with C if not fixed to either node |
| C | DD≤3, or CA/BBV/CVL in fleet; Random with A if not fixed to either node | |
| G | F | 1CL and 5DD; Random with K otherwise |
| K | Random with F May exist fleets that are fixed for K | |
| M | J | Fleets not fixed towards L and passing LoS check |
| L | Certain fleets fix towards L; Otherwise failed LoS check for J | |
Reaching node N 7 times clears the map.
- You are rewarded with a certain amount of resources upon reaching node N. The value depends on whether the resource bar is depleted or not.
- The resource bar will reset at midnight at the beginning of each month.
- The map will be relocked at the beginning of each month until you have completed 1-5 for the month.
- Clearing this map rewards you with 1 Present Box & 75 ranking points. No medal.
- Double-arrow nodes (D, F, L) are Air Battle Only nodes like those first appearing in the Summer 2014 Event. Daytime combat at these nodes have two Aerial Combat phases but no shelling.
- If your fleet has no ships that can attack during Aerial Combat, you will automatically get a D Defeat (see 1st D Defeat condition) unless you enter night combat (which is just a normal night battle).
There is no Boss node in this map. Instead you will receive a random amount of resources of either Fuel, Ammo, Steel, or Bauxite at the node with the Anchor symbol.
- Because Node N (the node after node B and D) is the End Node, you may advance with a heavily damaged ship (taiha) from node B or D without risk of sinking any of your ships.
- An exception would be when the flagship is heavily damaged. However, if the flagship is equipped with either Repair Team or Repair Goddess, the player may choose to use it and continue. (There are reports that the item is not consumed if used this way?)
- Because Node N is not considered to be a boss node, it will not count towards certain quests (namely Bw1) that requires you to reach a boss node.
- Using BBV, CA, CVL will take you to node C which leads to a route with harder enemies such as Flagship Wo-class and Flagship Ru-class. Submarine fleets with line ahead formation also appears at node I (3 out of 6 patterns).
- Generally speaking, the route through C is only taken if a player wishes to brute-force the map.
- The other route (A -> E -> G -> F -> B -> N) has 3 battles total.
- Node E is Submarine Node with Echelon formation. Because this node is so minor in nature, bringing Anti-Submarine equipments is not required.
- Node F is air-battle only.
- Having a ship with Anti-Air Cut-In equipment setup is highly recommended to reduce damage taken at node F.
- This node creates a dilemma for players as most fleets coming through this way have no air attack and so must take a defeat unless night battle is undertaken here (which consumes ammo and can be risky).
- You can bring either 2 AV or Akitsu Maru + CAV to have a chance at avoiding defeat at Node F, but this fleet can go from G to K which is hard for a light fleet.
Branching rules:
- The following ship types are not allowed on this map: (F)BB, CV, CLT, SS(V)
- You may only use BBV, CA(V), CVL, AV, CL, DD, Akitsumaru, Katori, Kashima, Akashi, and Taigei.
- Using BBV, CA, CVL will take you to node C which leads to a route with harder enemies such as Flagship Wo-class and Flagship Ru-class. Submarine fleets with line ahead formation also appears at node I (3 out of 6 patterns).
- Generally speaking, the route through C is only taken if a player wishes to brute-force the map or completing very specific quests that involve using ships that are not just 1 CL , 5 DD.
- The other route (A -> E -> G -> F -> B -> N) has 3 battles total.
- Node E is a submarine node with Echelon formation. Because this node is so minor in nature, bringing ASW equipment is not required.
- Node F is an Air Battle node only.
- Having a ship with Anti-Air Cut-In equipment setup is highly recommended to reduce damage taken at node F.
- This node creates a dilemma for players as most fleets coming through this way have no air attack and so must take a defeat unless night battle is undertaken here (which consumes ammo and can be risky).
- You can bring either 2 AV or Akitsu Maru + CAV to have a chance at avoiding defeat at Node F, but this fleet can go from G to K which is hard for a light fleet.
- Using BBV, CA, CVL will take you to node C which leads to a route with harder enemies such as Flagship Wo-class and Flagship Ru-class. Submarine fleets with line ahead formation also appears at node I (3 out of 6 patterns).
Tips
- Node E is a good place for players above Level 80 HQ to complete Bd8 (Sink 6 Submarines) and Bw5 (Sink 15 Submarines).
- Equipping a damecon (Repair Team) onto your flagship might be a good idea if by some chance the flagship takes heavy damage at node B, since it allows you to advance to the end node (Node N). Since the damecon is only used upon entering the next fight it'll remain in your inventory upon completing the stage.
Recommended Fleet Compositions:
- A - E - G - F - B - N:
- 1CL + 5DD: This is so far the only composition that guarantees A -> E -> G -> F -> B -> N. However this fleet will not be able to fight back at node F, so expect your win rate to go down slightly.
- 6 DD or 2 CL + 4 DD: Similar to 1CL+5DD setup, but has chance to go G -> K.
- Akitsu Maru + CAV + 4 DD or 2 AV + 4 DD: May be able to get B Victory at Node F, but can go G -> K.
Nodes and Enemy Encounters
| Area | # | Base EXP | Encountered vessels | Form | Air |
|---|---|---|---|---|---|
| A | "Must be my imagination" (battle avoided) | ||||
| B 任務部隊C群前衛部隊 |
1 | 100 | 
|
|
|
| 2 | 120 |
|
|||
| 3 | 130 |
|
|||
| 4 | 140 |
| |||
| AS+ 72 | |||||
| AS 36 | |||||
| 5 | 150 | 
|
|||
| C 通商破壊潜水艦隊II群 |
1 | 20 |
|
|
|
| 2 | 20 |
|
|
||
| 3 | 30 |
|
|
||
| 4 | 30 |
|
|||
| 5 | 40 |
|
|
||
| 6 | 50 |
|
|
||
| D 任務部隊A群機動部隊(第二波) Aerial Battle |
1 | 110 | 
|
| |
| AS+ 144 | |||||
| AS 72 | |||||
| 2 | 110 |
| |||
| AS+ 144 | |||||
| AS 72 | |||||
| 3 | 120 |
| |||
| AS+ 141 | |||||
| AS 71 | |||||
| 4 | 130 |
| |||
| AS+ 213 | |||||
| AS 107 | |||||
| 5 | 140 | 
| |||
| AS+ 228 | |||||
| AS 114 | |||||
| 6 | 150 | 
| |||
| AS+ 396 | |||||
| AS 198 | |||||
| E 通商破壊潜水艦隊III群 |
1 | 20 |
|
|
|
| 2 | 20 |
|
|||
| 3 | 30 |
|
|||
| 4 | 30 |
|
|||
| 5 | 40 |
|
|||
| 6 | 50 |
|
|||
| F 任務部隊C群機動部隊 Aerial Battle |
1 | 50 |  
|
| |
| AS+ 81 | |||||
| AS 41 | |||||
| 2 | 50 |
| |||
| AS+ 144 | |||||
| AS 72 | |||||
| 3 | 60 |
| |||
| AS+ 84 | |||||
| AS 42 | |||||
| 4 | 60 |
| |||
| AS+ 141 | |||||
| AS 71 | |||||
| 5 | 70 |
| |||
| AS+ 108 | |||||
| AS 54 | |||||
| 6 | 70 |
| |||
| AS+ 156 | |||||
| AS 78 | |||||
| 7 | 70 |
| |||
| AS+ 156 | |||||
| AS 78 | |||||
| 8 | 80 |
| |||
| AS+ 165 | |||||
| AS 83 | |||||
| G | + ( * 5?) + 20 (Maximum still need to test)
| ||||
| H | "Must be my imagination" (battle avoided) | ||||
| I 通商破壊潜水艦隊I群 |
1 | 20 |
|
|
|
| 2 | 30 |
|
|||
| 3 | 40 |
|
|||
| J 任務部隊A群機動部隊本隊 |
1 | 170 | 
|
| |
| AS+ 132 | |||||
| AS 66 | |||||
| 2 | 200 |
| |||
| AS+ 324 | |||||
| AS 162 | |||||
| 3 | 220 |
| |||
| AS+ 300 | |||||
| AS 150 | |||||
| 4 | 220 | 
| |||
| AS+ 354 | |||||
| AS 177 | |||||
| K 任務部隊支援水上打撃部隊 |
1 | 70 |
|
|
|
| 2 | 80 |
|
|
||
| 3 | 90 |
|
|
||
| 4 | 100 | 
|
|
||
| 5 | 110 |
|
|
||
| L 任務部隊A群機動部隊(第一波) Aerial Battle |
1 | 100 |
|
| |
| AS+ 141 | |||||
| AS 71 | |||||
| 2 | 100 |
| |||
| AS+ 213 | |||||
| AS 107 | |||||
| 3 | 110 |
| |||
| AS+ 228 | |||||
| AS 144 | |||||
| 4 | 120 |
| |||
| AS+ 396 | |||||
| AS 198 | |||||
| 5 | 120 |
| |||
| AS+ 405 | |||||
| AS 203 | |||||
| 6 | 130 |
| |||
| AS+ 576 | |||||
| AS 288 | |||||
| M | + 40
| ||||
| N | Before | + 300, 500, 1000
| |||
| + 300, 500
| |||||
| + 300
| |||||
| + 100, 200, 300
| |||||
| After | + 50, 100
| ||||
| + 50, 100
| |||||
| + ?
| |||||
| + 50
| |||||