1nq1k3/2ppn2r/4pp1b/1p4p1/1QPP2P1/1rN4B/PB2PP1P/RN2KR1b b Q - 0 23
FEN state: 1nq1k3/2ppn2r/4pp1b/1p4p1/1QPP2P1/1rN4B/PB2PP1P/RN2KR1b b Q - 0 23 ; Best move: b3b4
The current state of the chess board is: Black knight at b8, black queen at c8 and black king at e8. Black pawn at c7, black pawn at d7, black knight at e7 and black rook at h7. Black pawn at e6, black pawn at f6 and black bishop at h6. Black pawn at b5 and black pawn at g5. White queen at b4, white pawn at c4, white pawn at d4 and white pawn at g4. Black rook at b3, white knight at c3 and white bishop at h3. White pawn at a2, white bishop at b2, white pawn at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1, white rook at f1 and black bishop at h1. White queenside is the only castle move available. Half move number is 0. Full move number is 23. Black to move.