acol: 1C (2S) ? 9 Ax xxxx Axxxxx since opener promises 4-card C and denies weak nt there are huge chances for slam (big fit, 7 lossing tricks, 5 good controls), only the thing that may stop us from biding is is partner wanting to wack 5S (i doubt that p is missing two aces) scientific method may start with some cuebid (i initially tought 3S but several players sugessted 4S and that seems sligtly better as both 4S and 4NT minimize ops chances to find maybe a good 6S save) less schentific method is to bid directly 6 and hope for the best - afterall there is a >>75% chance that the slam will make :) (ops wil have less info, drawback is you may lose 7C if p Axx Kxx AK KQxxx will pass)