I was looking at some Pocket PC sudoku software and I found one that would be perfect except that it only allows up to four candidates to be entered in each cell. When I solve a sudoku on paper I tend to have on average four to six candidates per cell to start with (the ones with 1-3 candidates are precious!). I find them impossible to solve without putting in the candidates first (after entering the obvious slice & dice numbers). For me this applies from level medium upwards.

Can you solve hard puzzles without candidates? Any tips for avoiding getting swamped by the number of candidates?