The following house rules are highly recommended for use with CHS:

Chinese Restrictions:

All Chinese land and air units that are assigned to China Command HQ are only permitted to move, or base, within China, Japanese Occupied China or Manchukuo. Chinese land and air units can ONLY move to locations outside China if they are first transferred to another HQ.

Air units belonging to China Command are allowed to fly missions to hexes outside China.

This house rule simulates the restrictions imposed on the deployment of Chinese Nationalist units by their CinC, Chiang Kai Shek. The rule also applies to Communist Chinese forces, as it is assumed that they would not have been interested in foreign adventurism.

Australian Restrictions:

All Australian nationality Brigade and Division LCUs are only allowed to move within Australia Proper and New Guinea (including New Britain but NOT Dutch New Guinea). The exception is all Australian LCUs of this size that are designated as AIF units, e.g. 9th Division AIF; the two AIF Brigades that start in Malaya. This restriction is permanent, even if the units are reassigned to a HQ other than ANZAC Command, and still applies even if a Division or Brigade is split into smaller units.

There are no restrictions for Australian air units, other than the normal restrictions that apply to air units that are assigned to the ANZAC Command restricted HQ.

This house rule simulates the restrictions imposed on the movement of reserve Australian Army formations, which were only permitted to operate in Australia and Australian New Guinea. The professional AIF (Australian Imperial Force) units were not covered by this restriction.

Canadian restrictions:

Canadian land and air units can only be deployed in North America, including Canada, the USA, Alaska and the Aleutian Islands. This restriction is permanent, even if the units are reassigned to a HQ other than Canada Command.

This house rule simulates the fact that most of the Canadian armed forces deployed in Western Canada were home defence units that were not expected to operate outside of North America.

Japanese Restrictions:

Japanese land and air units that are assigned to the Kwantung Area Army HQ can not leave Manchukuo. They may leave if they are transferred to another HQ.

This house rule simulates the reluctance of the Japanese Kwantung Army to release forces assigned to it for use in other theatres.

Japanese Attacking the Soviets:

If playing as the Japanese vs. the AI or a PBEM opponent, then if the player decides to attack the Soviet Union (including the base of Urumchi in Western China), they should ensure that the first, or equal first, hex they enter is hex 65,32 (this hex is easy to enter, using the railway from hex 64,31). This will ensure that Soviet Union entry is properly triggered.

This house rule is required due to the hard coded Soviet border that does nto exactly match the Soviet border on Andrew Brown's WitP map.

Japanese island invasions (Japan vs Allied AI only):

If playing as the Japanese vs. the AI, then the Allied computer opponent will not (as far as I can tell) make use of the new Allied bases added to the game, such as Bora Bora and Seward. I presume that this is because these bases simply do not exist as far as the Allied AI is concerned. Because of this, try to resist invading and capturing these unused and undefended bases, e.g. with the ever popular submarine borne commando raids. Of course if playing a human opponent, then anything goes and this rule should be ignored.

Shinano

It was originally intended that there would be TWO versions of the Japanese ship Shinano - one a CV and one a BB, in the database, so that the Japanese player could have a choice of whether to complete the ship as a BB or a CV. It was decided, however, that this may be confusing to some players, and it also meant that a separate "Japanese AI" version of the scenario be created (to avoid the AI trying to build BOTH "Shinanos").

So players are now given a choice of how to use the Shinano in CHS, but if they want the option to play with anything other than the Shinano being completed as a CV, they must use the editor to set the scenario up, as follows:

1. The default setting is that the Shinano is present as a CV. If you are happy with this, then just leave the scenario as is.
   

2. To make the Shinano a BB instead of a CV:

   • Open the scenario in the WIP Database Editor.
   • Press the "Ships" button.
   • Select the ship in slot number 10 - Shinano.
   • Change the "Delay" value from "441119" to "9999".
   • Select the ship in slot number 781 - Shinano.
   • Change the "Delay" value from "9999" to "441020".
   • Save the scenario database and exit from the editor.

   The scenario can now be played with the Shinano appearing as a BB instead of a CV.

3. To allow the Japanese player to decide during the game whether to complete the Shinano as a BB or a CV:
   

   • Open the scenario in the WIP Database Editor.
   • Press the "Ships" button.
   • Select the ship in slot number 781 - Shinano.
   • Change the "Delay" value from "9999" to "441020".
   • Save the scenario database and exit from the editor.
     

   The scenario can now be played with the Japanese player having a choice as to whether to complete the Shinano as a BB or a CV, as there are now TWO versions of the Shinano under construction. To make this work properly, the COMPULSORY SHINANO house rule MUST be used:
   

   COMPULSORY Shinano House Rule:
   The construction of at least one of the two Shinano ships MUST always be halted. The Japanese player is only permitted to be building ONE of the ships at any time. The player may halt both ships if they wish, or switch construction between the two ships at any time as long as one of them always remains halted. If by some error BOTH Shinanos are launched, then BOTH must be scuttled immediately as soon as this is discovered by either player.
   
   

4. Keen Japanese fanboys could also play a fantasy scenario in which the fourth Yamato class hull is also constructed. The Shinano itself would be built as a CV and the fourth Yamato class ship as a BB. To do this:
   

   • Open the scenario in the WIP Database Editor.
   • Press the "Ships" button.
   • Select the ship in slot number 781 - Shinano.
   • Change the "Delay" value from "9999" to "451020".
   • Change the name to whatever you think the ship would have been called (it was only known as the unnamed "Job 111").
     
   • Save the scenario database and exit from the editor.

   Note that the Japanese economy will probably not be able to handle the costruction of TWO further Yamato class ships. Also, the proposed completion date of 451015 is probably very optimistic. But this IS a fantasy scenario.