rn1qkbn1/ppp1pp1r/3p4/7p/1PPPbP1P/P4NpR/3KP1P1/RNB1QB2 w q - 4 13
FEN state: rn1qkbn1/ppp1pp1r/3p4/7p/1PPPbP1P/P4NpR/3KP1P1/RNB1QB2 w q - 4 13 ; Best move: f3g5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at e7, black pawn at f7 and black rook at h7. Black pawn at d6. Black pawn at h5. White pawn at b4, white pawn at c4, white pawn at d4, black bishop at e4, white pawn at f4 and white pawn at h4. White pawn at a3, white knight at f3, black pawn at g3 and white rook at h3. White king at d2, white pawn at e2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white queen at e1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 4. Full move number is 13. White to move.