Starting position #568
Back-rank setup: RBNKBNRQ
SP-568 · ThroneGuard — A centre-file king with no knight on the edge; a position and its mirror twin always share 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 d1, the rooks on a1 and g1, the queen on h1.
Castling ends where it always does: king to g1 and rook to f1 on the short side, king to c1 and rook to d1 on the long one.
The bishops stand on b1 and e1; their long diagonals reach h7 and a5 once the c- and d-pawns step aside.
One second-rank pawn starts with no defender at all: b2.
The setup belongs to the ThroneGuard family; read right to left it becomes position 493.
The engine's main line opens with g3.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 11 Morozov Balance Index: 11 of 100 — class D — largest edge.
- Engine evaluation of the starting position: +42 centipawns for White (depth 44, 400 000 000 nodes).
- Rank 856 of 960 by balance — 1 is the most balanced start.
- Balance band L — large edge · dynamics along the play-out: stable
- Evaluation along the engine's main line (60 half-moves): +30 → +31 → +15 → 0
Position facts
- Mirror twin: position #493
- The king starts on d, the rooks on a and g
- It becomes the daily position in 257 days
Puzzles from this position
- Attack on the uncastled king: pawn to c7 — Chess960 specifics · 780
- Attack on the uncastled king: rook to a5 (a1·2) — Chess960 specifics · 780
- Winning blow: queen to a8 (a7·2) — Chess960 specifics · 920
- Attack on the uncastled king: knight to d5 (e3·13) — Chess960 specifics · 1060
- Attack on the uncastled king: king to d2 (d1·9) — Chess960 specifics · 1250
- Mate in 2: queen to d7 (c7·2) — Chess960 specifics · 1320
- Winning blow: bishop to c7 (a5·3) — Chess960 specifics · 1510
- Mate in 3: queen to f7 (f6·3) — Chess960 specifics · 1760
- Winning blow: rook to d5 (d1·23) — Chess960 specifics · 2100
- Chess960 tactic on a6 (b8) — Chess960 specifics · 2400
This position appears in course day 19
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Commentary
The king begins on d1 and castling is ordinary in both directions, with the rooks on a1 and g1. The bishops are on b1 and e1, the knights on c1 and f1. Among the pawns, b2 is the one that begins without a defender. The queen begins in the far corner on h1. White's edge here is a wide one, +42 centipawns: g3 c6 e4 g6 c3 e5.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.