[quote author=Frendo link=1166772129/0#6 date=1167345620]
I guess Eric's changed his mind?[/quote]
Revising one's opinions is of course not a bad thing in itself, but it can become a habit.
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Regarding 1. d4 Ktf6 ; 2. a3, here is what is to be read in Eric's NIC article : 
[quote] 2. ...e6 ; 3. c4 c5 ; 4. Ktf3 is pleasant for White [/quote]

[quote author=GMEricPrie link=1150663394/30#33 date=1151332291]1.d4 e6 2.a3 Nf6 3.c4 is OK for White[/quote]

[quote author=GMEricPrie link=1150663394/45#58 date=1159900017] 3.c4 is playable [/quote] 

It's a good thing I stopped posting in that thread, or we might eventually have read "3. c4 loses". 

Another example:
[quote author=GMEricPrie link=1150663394/15#20 date=1150983291]
If, dubitatively, you are not yourself a 1.d4 d5! player as Black it is difficult to imagine the pleasure it is when your opponent does not enter the critical Slav lines! [/quote]

[quote author=GMEricPrie link=1150663394/45#58 date=1159900017]
1.d4 d5 2.Nf3 Nf6 3.a3 c6 4.Bf4 intending 4...Bf5 (4...Qb6?! 5.Qc1) 5.e3 e6 ; 6. c4 fully comply with my views.[/quote]

Can I know some of the lines after 4.d5?

It's not refuted, but 3. ...c5 is very challenging. The best reply is probably 4. d5, although an easy edge is not on the cards.

Instead of going into the rather tedious Torre with 3. Ktf3 , 3. e3 or 3. c3 (by the way Eric, I'm surprised you don't recommend 3. a3"!") White can also avoid 3. e4 c5!? with 3. Ktd2 which is the most flexible move in the position.
 
Now 3. ...h6 ; 4. Bxf6 (4. Bh4 c5 leads to Torre-like territory again) Qxf6; 5. c3 d6 ; 6. e4 g6 ; 7. Bd3 Bg7 ; 8. Kte2 0-0 ; 9. 0-0 Ktd7 ; 10. f4 e5 transposes to the line 3. e4 h6 ; 4. Bxf6 Qxf6 ; 5. c3!? (the other main move is 5. Ktc3. It's not clear which is better but they certainly both carry more punch than the Torre transposition 5. Ktf3). A clear advantage is not easy to demonstrate, but at least White has avoided the challenging 3. e4 c5 line, while affirming his central presence.

Instead, 3. …d5 (which Eric would no doubt punctuate this with “??”) gives White a choice between 4. Ktf3 (this time with a nice pull), 4. e3 c5 ; 5. c3 Ktc6 ; 6. Bd3 Be7 ; 7. Kte2 with or without the switch to a reversed Stonewall structure with a subsequent f4 and 4. e4 ed ; 5. Ktxe4 which is a direct  transposition to the Burn variation of the French (3. Ktc3 Ktf6 ; 4. Bg5 ed). 3. …Be7 ; 4. e4 d5 is clearly an inferior version for Black of the classical variation of the French (3. Ktc3 Ktf6 ; 4. Bg5 Be7).

Critical of course is the immediate 3. ...c5. If White does not want to drift into the aforementioned Torre dullness he should consider wheeling out the odd-looking 4. Kte4!? when 4. …cd  ; 5. Qxd4 Qa5+ (5. …Be7 ; 6. Ktd6+); 6. Bd2 Qf5 ; 7. Ktxf6 Qxf6 ; 8. Qxf6 gf ; 9. e4 and 4. …Be7 ; 5. Ktxc5 Bxc5 ; 6. dc Qa5+ ; 7. Qd2 Qxc5 ; 8. Bxf6 gf ; 9. e4 confer rather favourable forms of Open Sicilian for White. More problematic is 4. …d5 ; 5. Ktxc5 Bxc5 ; 6. dc Qa5+ ; 7. c3 Qxc5 ; 8. e3 when although White has bagged the dark-squared Bishop, Black’s centre makes up for this to some extent.

In conclusion, 3. Ktd2 it is not the answer to all White’s dreams, but it is well worth considering.

Can someone help me? I checked the database and Black won more than White