1r1qkbnr/p1pp1p2/n1b3p1/1p2p2p/PP1PN3/2K1B3/2P1PPPP/1R1Q1BNR w k - 2 10
FEN state: 1r1qkbnr/p1pp1p2/n1b3p1/1p2p2p/PP1PN3/2K1B3/2P1PPPP/1R1Q1BNR w k - 2 10 ; Best move: d4d5
The current state of the chess board is: Black rook at b8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7 and black pawn at f7. Black knight at a6, black bishop at c6 and black pawn at g6. Black pawn at b5, black pawn at e5 and black pawn at h5. White pawn at a4, white pawn at b4, white pawn at d4 and white knight at e4. White king at c3 and white bishop at e3. White pawn at c2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at b1, white queen at d1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 2. Full move number is 10. White to move.