1rb1qkr1/pp1p3p/2p2np1/5N2/P2pPp1P/2P1B3/nP1Q1PP1/RN2KB1R w K - 2 20
FEN state: 1rb1qkr1/pp1p3p/2p2np1/5N2/P2pPp1P/2P1B3/nP1Q1PP1/RN2KB1R w K - 2 20 ; Best move: d2d4
The current state of the chess board is: Black rook at b8, black bishop at c8, black queen at e8, black king at f8 and black rook at g8. Black pawn at a7, black pawn at b7, black pawn at d7 and black pawn at h7. Black pawn at c6, black knight at f6 and black pawn at g6. White knight at f5. White pawn at a4, black pawn at d4, white pawn at e4, black pawn at f4 and white pawn at h4. White pawn at c3 and white bishop at e3. Black knight at a2, white pawn at b2, white queen at d2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 20. White to move.