r3kbr1/2pb1p1n/pP4p1/1B2p3/1P2p1qp/1n3Q1P/2PP1BP1/RN2KNR1 w q - 4 23
FEN state: r3kbr1/2pb1p1n/pP4p1/1B2p3/1P2p1qp/1n3Q1P/2PP1BP1/RN2KNR1 w q - 4 23 ; Best move: f3b3
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at c7, black bishop at d7, black pawn at f7 and black knight at h7. Black pawn at a6, white pawn at b6 and black pawn at g6. White bishop at b5 and black pawn at e5. White pawn at b4, black pawn at e4, black queen at g4 and black pawn at h4. Black knight at b3, white queen at f3 and white pawn at h3. White pawn at c2, white pawn at d2, white bishop at f2 and white pawn at g2. White rook at a1, white knight at b1, white king at e1, white knight at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 4. Full move number is 23. White to move.