rn1qkbr1/p2p1ppp/7n/1pp1p3/4bP1P/P2P4/1PPBPKP1/RN1Q1BNR w q - 4 10
FEN state: rn1qkbr1/p2p1ppp/7n/1pp1p3/4bP1P/P2P4/1PPBPKP1/RN1Q1BNR w q - 4 10 ; Best move: d3e4
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 rook at g8. Black pawn at a7, black pawn at d7, black pawn at f7, black pawn at g7 and black pawn at h7. Black knight at h6. Black pawn at b5, black pawn at c5 and black pawn at e5. Black bishop at e4, white pawn at f4 and white pawn at h4. White pawn at a3 and white pawn at d3. White pawn at b2, white pawn at c2, white bishop at d2, white pawn at e2, white king at f2 and white pawn at g2. White rook at a1, white knight at b1, white queen at d1, white bishop at f1, 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 10. White to move.