Sergash: Jan Banas was born in Czechoslovakia in 1947 (he was 54 years old when he played this game) and has been an international master since 1979. He was rated 2361 at the time of the actual encounter, while he is 2259 in 2016.
On the other side, Carlsen was 10 years old and rated 2084, with no official title.
It is interesting to note that this game, the 2nd of the tournament, started the same way than the one Calrsen had played as White in round 1, agains Dejan Stojanovski, a draw in 20 moves. What it intended by banas, or simply a coincidence? Carlsen vs D Stojanovski, 2001
<4.d4> This is a more direct approach than the previous time Calkrsen had been in this position, earlier that same year against Hersvik: D Hersvik vs Carlsen, 2001
<14.Be3?!> While we are still in the theory, better are:
A) 14.Bxg7 Kxg7 15.Qd4+! Kg8 16.b4! b6! 17.f4 Qb8 Dan Cramling (2330) vs. Thomas Heiberg (2250), Baerum Batumi (?) 1980, round 2, draw
B) 14.b4 b6 (14...Bxd4+ 15.Qxd4 b6 would transpose in the game Cramling vs. Heiberg above) 15.Bxg7 (15.a3 Re8 16.Bxg7 Kxg7 would transpose in the game Bensch vs. Schramm below) Kxg7 16.f4 (16.Qd4+ Kg6 would go back in Cramling vs. Heiberg; or 16.a3 Re8 17.Qd4+ Kg8 Patrick Bensch (2280) vs. Christian Schramm (2359), Freising Open (Germany) 2001, round 9, draw) a5 17.b5 Bb7 Heinz Wirthensohn (2397) vs. Markus Klauser (2402), Switzerland Championship 2006 in Lenzerheide, round 1, 1-0.
<17...Bxd5?!> Strangely enough, historically this is almost the only move played here, despite its inferiority! The correct path was shown to be 17...Qd8! 18.Bf1 b6 B. Theodorsson vs. Bernd Schmitz, 15th World Team Championship 1968, Finals 'A' - Iceland against East Germany, round 2, draw
<18.exd5?! Qb4 > Better is 18.cxd5! Rfc8 19.Rc4 Qd8 20.Rdc1 b5! (Drazen Marovic (2455) vs. Dragoljub Velimirovic (2520), Osijek (Yugoslavia) 1978, round 3, 1-0) 21.R4c2 b4 / Lorne Yee (2084) vs. Piotr Olszewski (2273), 6th Financial Concept Open 1999 in North Bay (Canada), round 8, draw.
<19.Bf1N> This is the theoritical novelty in this game. Before that and of a similar value, there had been 19.Rc2 = / Selby Anderson vs. Carter Gibson, 101th US Open 2000 in Saint-Paul (USA), round 3, draw.