r1bqk1r1/pp1np1bp/n2p2p1/8/3pP3/P6P/1PPKN1P1/RNB1QBR1 w q - 0 13
FEN state: r1bqk1r1/pp1np1bp/n2p2p1/8/3pP3/P6P/1PPKN1P1/RNB1QBR1 w q - 0 13 ; Best move: d2d1
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black rook at g8. Black pawn at a7, black pawn at b7, black knight at d7, black pawn at e7, black bishop at g7 and black pawn at h7. Black knight at a6, black pawn at d6 and black pawn at g6. Black pawn at d4 and white pawn at e4. White pawn at a3 and white pawn at h3. White pawn at b2, white pawn at c2, white king at d2, white knight at e2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white queen at e1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.