r1bqk3/2ppbppn/p3p3/npP4p/P3P3/1QNP2rP/1P3PB1/R1B2KNR w q - 0 13
FEN state: r1bqk3/2ppbppn/p3p3/npP4p/P3P3/1QNP2rP/1P3PB1/R1B2KNR w q - 0 13 ; Best move: b3c2
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black king at e8. Black pawn at c7, black pawn at d7, black bishop at e7, black pawn at f7, black pawn at g7 and black knight at h7. Black pawn at a6 and black pawn at e6. Black knight at a5, black pawn at b5, white pawn at c5 and black pawn at h5. White pawn at a4 and white pawn at e4. White queen at b3, white knight at c3, white pawn at d3, black rook at g3 and white pawn at h3. White pawn at b2, white pawn at f2 and white bishop at g2. White rook at a1, white bishop at c1, white king at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.