The Orthodox Variation, Positional Defense, Closed Line is a variation of the King's Indian Defense, catalogued as ECO E94. The line runs 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. d5, reaching the position shown below after 15 half-moves.
Both sides have pawns in the centre (White on d5 and e4, Black on e5). Development is level at three minor pieces each. It is Black to move after eight moves. Both kings have castled kingside, so play tends to shift to the centre and the opposite flank.
On the King's Indian Defense generally: A hypermodern defense where Black allows White to build a big center, then counterattacks it.
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The Orthodox Variation, Positional Defense, Closed Line goes 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. d5. It is a variation of the King's Indian Defense and is catalogued as ECO E94.
The Orthodox Variation, Positional Defense, Closed Line is ECO E94. ECO codes group openings by their move order, so nearby codes cover closely related lines of the King's Indian Defense.
Stockfish evaluates the position after 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. d5 at +0.18 at depth 18, which is balanced. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
Both sides have pawns in the centre (White on d5 and e4, Black on e5). Development is level at three minor pieces each. It is Black to move. Both kings have castled kingside, so play tends to shift to the centre and the opposite flank.