Starting position #765
Back-rank setup: RKNBNRBQ
SP-765 · RampartGuard — King pushed to the b- or g-file, knights off the edges — 144 positions here.
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 f1, 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 d1 and g1; their long diagonals reach h5 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 392.
The engine's main line opens with g4.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 14 Morozov Balance Index: 14 of 100 — class D — largest edge.
- Engine evaluation of the starting position: +40 centipawns for White (depth 45, 400 000 000 nodes).
- Rank 819 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 (42 half-moves): +43 → +25 → 0
Position facts
- Mirror twin: position #392
- The king starts on b, the rooks on a and f
- King and rook are neighbours — castling from adjacent squares feels unusual
- It becomes the daily position in 1326 days
Puzzles from this position
- Attack on the uncastled king: bishop to a5 (c3) — Chess960 specifics · 780
- Winning blow: queen to f1 (h1) — Chess960 specifics · 780
- Attack on the uncastled king: knight to d7 (e5·14) — Chess960 specifics · 920
- Winning blow: bishop to f5 (d3·2) — Chess960 specifics · 1010
- Winning blow: knight to d3 (e1) — Chess960 specifics · 1060
- Winning blow: pawn to a8 (a7·5) — Chess960 specifics · 1250
- Attack on the uncastled king: queen to b7 (h1·21) — Chess960 specifics · 1450
- Attack on the uncastled king: queen to c5 (d4·3) — Chess960 specifics · 1560
- Mate in 3: queen to g8 (g3) — Chess960 specifics · 1860
- Chess960 tactic on g7 (c3) — Chess960 specifics · 2120
This position appears in course day 9
In your browser or in the Android app. Nothing to install · Free, no ads
Commentary
Short castling is two half-moves in one here: the rook already occupies f1, and the king still has five squares to travel to g1. The bishops are on d1 and g1, the knights on c1 and e1 — both can reach d3, so the third half-move carries a letter. On the second rank, d2 has no defender, and b2 leans on the king alone. The queen begins in the far corner on h1, the second rook in the corner on a1. White's edge here is a wide one, +40 centipawns: g4 g5 Ned3 Nb6 h4 f6.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.