Knights on c3 & f3, bishops on d3 & e3 - what is this called, and is it sound? Sometimes when opening I fall into this odd rut of developing knights to C3 and F3, and bishops to D3 and E3. (Or, as black, C6, F6, D6 and E6). For instance, the position after 7.Be3:
[FEN &quot;&quot;]
[Event &quot;Rated Blitz game&quot;]
[Site &quot;https://lichess.org/BPXlGMH2&quot;]
[Date &quot;2021.05.19&quot;]
[White &quot;stevage&quot;]
[Black &quot;Rodeon0049&quot;]
[Result &quot;0-1&quot;]
[UTCDate &quot;2021.05.19&quot;]
[UTCTime &quot;02:54:05&quot;]
[WhiteElo &quot;1655&quot;]
[BlackElo &quot;1811&quot;]
[WhiteRatingDiff &quot;-3&quot;]
[BlackRatingDiff &quot;+4&quot;]
[Variant &quot;Standard&quot;]
[TimeControl &quot;0+5&quot;]
[ECO &quot;A40&quot;]
[Opening &quot;Modern Defense&quot;]
[Termination &quot;Normal&quot;]
[Annotator &quot;lichess.org&quot;]

1. d4 g6 { A40 Modern Defense } 2. c4 Bg7 3. Nc3 c6 4. e4 d6 5. Bd3 Nf6 6. Nf3 Bg4 7. Be3 Bxf3 8. Qxf3 O-O 9. O-O e5 10. d5 cxd5 11. cxd5 Na6 12. Bg5 Nb4 13. Be2 Nc2 14. Rac1 Nd4 15. Qg3 Qb6 16. b3 Rac8 17. Na4 Nxe2+ 18. Kh1 Nxg3+ { White resigns. } 0-1

Does this structure have a name? It seems it could arise in response to a number of different openings.
Does it have any particular merit? What are its weaknesses?
I'm not really sure what to think about it - I sometimes fall into this pattern when my opponent plays quiet developing moves that don't engage the centre.
I don't know a specific name to it, but what concerns the downsides of this setup, I could think of two. Of course, it is very situational, but since in the example black opted for a kings-indian setup, it is that 1) the bishop on d3 is rarely useful against the fianchetto (pawn on g6 is well protected), and 2) it blocks the d-file which sometimes can lead to weakening of the d4 pawn and/or square. For example, there is a line in KID where white plays Bd3 and Nge2, and one of the black's possible responses is Nc6 and e5, and he's ready to meet d5 with Nd4. This would be impossible in a classic white setup with the light-square bishop on e2.