rnb1k3/5p1r/p3p2p/1p1pn3/P2K2p1/8/1PPbBPPP/RNB3R1 w q - 0 23
FEN state: rnb1k3/5p1r/p3p2p/1p1pn3/P2K2p1/8/1PPbBPPP/RNB3R1 w q - 0 23 ; Best move: b1d2
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black king at e8. Black pawn at f7 and black rook at h7. Black pawn at a6, black pawn at e6 and black pawn at h6. Black pawn at b5, black pawn at d5 and black knight at e5. White pawn at a4, white king at d4 and black pawn at g4. White pawn at b2, white pawn at c2, black bishop at d2, white bishop at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 23. White to move.