r2qk1r1/p1pnppbp/3pb1p1/1p4B1/1P4n1/3P1P2/P1PQP1PP/RN2KBNR w KQq - 4 10
FEN state: r2qk1r1/p1pnppbp/3pb1p1/1p4B1/1P4n1/3P1P2/P1PQP1PP/RN2KBNR w KQq - 4 10 ; Best move: d3d4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black rook at g8. Black pawn at a7, black pawn at c7, black knight at d7, black pawn at e7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at d6, black bishop at e6 and black pawn at g6. Black pawn at b5 and white bishop at g5. White pawn at b4 and black knight at g4. White pawn at d3 and white pawn at f3. White pawn at a2, white pawn at c2, white queen at d2, white pawn at e2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside, white queenside and black queenside castles are available. Half move number is 4. Full move number is 10. White to move.