Bitboard inspector
Paste a 64-bit value and see which squares are set. Click squares to toggle bits, load a preset mask, or derive piece bitboards from a FEN. Uses LERF indexing — a1 is bit 0, h8 is bit 63.
Set bits:
0
Representations
- Hex
- 0x0
- Decimal
- 0
- Binary
- —
Preset masks
From FEN
Paste a FEN; click a row to load that bitboard.