For iOS, the just released version of EasyGo(V1.2) can create problem from the current game position, that is , you can crop part of the current board to create a new game. Is that what you want?

And I can't understand some part of your message. You first stated that the ONLY programs are drago and MFOG, and then mentioned GoHome is the only program...

After re-read your message, I understood now. You first stated that the ONLY programs are drago and MFOG, you actually mean the go playing program that can continue to play from a specific position of an existing sgf file.

No plan yet. First I need to focus on problem practice, game edit/replay.

And even I want to add the go playing capability, I have to use some open source go playing engine which allow use in commercial programs.

I hope Igowin HD or Crazy Stone could add the function you want. Or you could ask Little Go to implement this. Little Go is a free iOS go playing program based on fuego.

I think iPad2/3's speed is about 5-10 times slower than desktop/laptop, so it's okay to play with AI on iPad, but If you want to study how to play at a specific board position. I'd like to suggest that you do this in a powerful program (such as MFOG) on a PC, or ask other players for help.

How about giving it the ability to copy game fragments only to SGF format? That would be great.

I have Little Go, too! But the strange thing about Little Go is...you can play a game of Go...but once the game s over - you can't replay the game on the iPad! Believe me I've tried. It allows playing but no replay button to review the game. Oh...another thing, Little Go only allows iTunes file sharing. That's a pain in the butt. I have to connect my iPad to my computer and select File Sharing from iTunes to get the game, and then transfer it to the computer.

What do you mean? what's the difference between create problem function(crop the current board position to form a new game) of EasyGo and "copy game fragments"?

How do I do this?! I didn't understand what that function meant. Can I copy SGF game fragments using this feature?

While edit a game, you can create a problem by tap the action button(bottom right) and select "create problem", then drag the red handle to adjust the frame, then tap done button. The newly created problem will be opened automatically, then tap edit button and select "show sgf source", then tap copy button.

By the way, with L19 sgf or sgf-problem tag, you can easily post your newly created problem/game position here.

Thanks for the tip. I'll try this. One thing I'd love to see in Easy Go...tab support. Opening multiple games in tabs. This would be great so I wouldn't have to constantly open one game after another to edit.