Re Playing solitaire.
I don't play solitaire much as I am not very keen, but when desperate have played 4 C&C games on my own.
I look for a game with even command cards or just 1 difference (note this is when playing with no tact cards). I then play each side by drawing on their turn 2 command cards. I use one which when used goes into the discard pile and the one not used goes into a re-shuffle pile. Each time there is a melee I roll percentage dice and a 7% or lower will result in a first strike. These are taken out before game start.
If the deck reaches its end re-shuffle THE UN-USED Command cards only and then go through them the same way by playing one and discarding it and putting the un-used one in a seperate pile. Re-Shuffle all the cards if an Elan card is played or when all Command cards have been used by going through the re-shuffle pile multiple times.
Its enjoyable as you never know what cards the other side will get. Not a perfect simulation of the game, but enough to keep the solo player in the dark as to what is coming.