Chirally symmetrical initial Fischer's positions

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Yigor

They are symmetrical except for the K<->Q permutation. I'm planning to make evaluations and create test games (Explorer, d=20). Here's the list:

 

  1. BNRKQRNB 1. b3 (+0.23) b6 2. Nf3 c5 3. g3 e6 4. e4 Qe7 5. O-O-O Nf6 (+0.00) and BNRQKRNB 1. c4 (+0.00) c5 2. e3 Nf6 3. g4 O-O 4. g5 Ne8 5. Nc3 Nc6 (+0.15)
  2. BRKNNQRB and BRQNNKRB
  3. BRNKQNRB and BRNQKNRB
  4. NBRKQRBN and NRBQKRBN
  5. NRBKQBRN and NRBQKBRN
  6. NRKBBQRN and NRQBBKRN
  7. RBKNNQBR and RBQNNKRB
  8. RBNKQNBR and RBNQKNBR 1. d4 (+0.20) d5 2. c3 c6 3. e4 dxe4 4. Bxe4 e5 5. f3 exd4 (+0.16)
  9. RKBNNBQR and RQBNNBKR
  10. RKNBBNQR and RQNBBNKR
  11. RNBKQBNR 1. d4 (+0.44) d6 2. Nf3 e5 3. e4 Bg4 4. d5 f5 5. Be2 Nf6 (+0.35) and RNBQKBNR standard
  12. RNKBBQNR and RNQBBKNR
Yigor

Normally, we'll consider the 2nd type of positions with the king at the right-hand side of the board. Here's the illustration of #1B:

 

 

Yigor

I started to indicate best moves and evaluations (Explorer, 1 line, d=20->21). Haha, there seems to be no moves giving the advantage in the first position. tongue.png

Yigor

It's possible to make immediately the long castling in the position #1A:

 

 

Yigor

The 1st test game (Explorer, d=20) is quite crazy with a kind of Advanced Grob attack:

 

 

Yigor

I've added the test opening for the chiral (mirror) image of the standard initial position #11A discussed here:

https://www.chess.com/forum/view/chess960-chess-variants/chirally-standard-position-in-chess960