Starting position #766
Back-rank setup: RKNNRBBQ
SP-766 · RampartGuard — Both knights begin on inner files while the king sits on the wing (b/g); mirror twins stay together in this family.
Move the pieces right on the board — full Chess960 rules, castle by dropping the king on the rook.
Position features
The king starts on b1, the rooks on a1 and e1, the queen on h1.
From b1 the king makes the longest journey Chess960 allows when castling short: five squares to g1.
The bishops stand on f1 and g1; their long diagonals reach a6 and a7 once the e- and f-pawns step aside.
One second-rank pawn starts with no defender at all: d2.
The setup belongs to the RampartGuard family; read right to left it becomes position 388.
The engine's main line opens with e4, putting a pawn straight into the centre.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 21 Morozov Balance Index: 21 of 100 — class D — largest edge.
- Engine evaluation of the starting position: +36 centipawns for White (depth 44, 400 000 000 nodes).
- Rank 748 of 960 by balance — 1 is the most balanced start.
- Balance band M — moderate edge · dynamics along the play-out: equalizing
- Evaluation along the engine's main line (54 half-moves): +47 → +31 → 0
Position facts
- Mirror twin: position #388
- The king starts on b, the rooks on a and e
- King and rook are neighbours — castling from adjacent squares feels unusual
- This position does not come up as the daily position in the next four years
Puzzles from this position
- Attack on the uncastled king: pawn to b3 (c2·12) — Chess960 specifics · 780
- Winning blow: queen to c6 (d5·2) — Chess960 specifics · 1010
- Attack on the uncastled king: rook to e8 (e5·3) — Chess960 specifics · 1090
- Attack on the uncastled king: bishop to g2 (f1·7) — Chess960 specifics · 1200
- Winning blow: rook to g7 (h7·2) — Chess960 specifics · 1200
- Winning blow: bishop to f3 (h5·2) — Chess960 specifics · 1280
- Attack on the uncastled king: queen to a7 (g1·5) — Chess960 specifics · 1320
- Mate in 2: queen to a7 (a5·5) — Chess960 specifics · 1450
- Mate in 3: queen to d6 (g3·2) — Chess960 specifics · 1630
- Mate in 3: queen to e8 (h5·3) — Chess960 specifics · 1980
This position appears in course day 185
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Commentary
The king begins on b1, and short castling takes him five squares across the board to g1. The bishops sit together on f1 and g1, the knights side by side on c1 and d1. Among the pawns, d2 has no defender, and c2 leans on the king alone. The queen begins in the far corner on h1, the rooks on a1 and e1. White's edge here is a wide one, +36 centipawns: e4 e5 Nc3 Nc6 g3 g5.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.