You are saying it is difficult for Zimbabwe to chase this score, i would say it is close to impossible for them. Although they had a decent start to the batting in the 2nd innings with Takudzwanashe Kaitano still batting on 34, but they still trail by 405 runs. It is almost impossible for them to first level the score and then take the lead with just 9 wickets in hand.
It is just a matter of how long the Zimbabwe team can survive. Sean Williams had a good innings in the last innings and also some batting were shown by the middle order. It would be interesting to see how Zimbabwe starts the game tomorrow.
After seeing poor batting of Zimbabwe in first innings its now clear that they won't be able to avoid an innings defeat. Zimbabwe score is 51/1 in second innings while in first innings they lost four wickets when score was 51 runs. If Sean Williams has not scored 83 runs in first innings then Zimbabwe won't be able to score even 100 runs in first innings. Zimbabwe batsmen must try to stay on pitch and try to score as many runs as possible to boost their confidence against top test teams. This series is going to be 2-0 and SA unlucky that this series is not part of WTC.