func (g *G) movechk() (oftp game.FromToProm, err error) {
var i int64
i, err = g.af(g)
if err == nil {
var md *server.MoveData
md, _, err = g.c.Service.Move(i)
if err != nil {
return
}
if md.BeforeGame == g.gameid {
g.gameid = md.AfterGame
oftp = md.FromToProm()
err = g.getstate()
} else {
e := ErrorNotAfter{*md, i, g.gameid}
err = &e
}
}
return
}
