beirut/amman/ankara syria opposition reject russian-sponsored initiative reach political settlement civil war turkey protest move involve kurdish group early setback moscow peacemaking bid intervene decisively syrian war 2015 support president bashar al-assad russia hop build collapse islamic state launch political process end six-year-old conflict syria government say ready attend nov. 18 sochi congress set focus new constitution say time right thank syrian army gain terrorists obliteration officials anti-assad opposition reject meet wednesday insist talk hold u.n. sponsorship geneva scene string fail peace efforts congress amount meet regime regime say mohammad alloush member opposition high negotiations committee senior official jaish al-islam rebel group hnc surprise mention list invite group would issue statement party set general position reject conference alloush tell reuters turkey-based syrian national coalition snc political opposition group say congress attempt circumvent international desire political transition syria russian air power play big part defeat rebel opposition-held eastern aleppo areas last year kind syrian-syrian dialogue sponsorship russian criminal say eyad shamsi another hnc member head rebel faction russian negotiator say tuesday syrian group choose boycott congress risk sideline political process move ahead russia invite 33 syrian group political party call syrian congress national dialogue russian president vladimir putin first mention idea congress last month say believe moscow syrian government would soon finally defeat militants syria help russia air force array iran-backed shi ite militias assad defeat many syrian rebel fight topple leave confine enclaves west damascus ally also recover swathe central eastern syria islamic state recent months separate campaign u.s.-backed syrian democratic force sdf drive part country separate campaign converge islamic state last strongholds deir al-zor province iraqi border russia decision invite kurdish group dominate sdf sochi trigger objections turkey wednesday ankara view dominant syrian kurdish group national security threat say unacceptable kurdish ypg militia invite turkish presidential spokesman ibrahim kalin say turkish russian officials discuss issue hold meet solve problem spot turkey view ypg political affiliate pyd extension kurdistan workers party pkk wag three-decade insurgency turkey head pyd indicate wednesday group favor attend congress shahoz hasan write comment reuters say pyd would advocate decentralize model syria although firmly commit attend say majority among pyd ally favor go discuss majority view attend syrian opposition reject russia-sponsored peace initiative