rn2kbr1/2pp1ppp/bp3q1n/p7/P1B1p3/1KPPP2P/1P3PP1/RNB3NR w q - 4 13
FEN state: rn2kbr1/2pp1ppp/bp3q1n/p7/P1B1p3/1KPPP2P/1P3PP1/RNB3NR w q - 4 13 ; Best move: c4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at c7, black pawn at d7, black pawn at f7, black pawn at g7 and black pawn at h7. Black bishop at a6, black pawn at b6, black queen at f6 and black knight at h6. Black pawn at a5. White pawn at a4, white bishop at c4 and black pawn at e4. White king at b3, white pawn at c3, white pawn at d3, white pawn at e3 and white pawn at h3. White pawn at b2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 13. White to move.