2bqkb1r/r4ppp/p2p4/3np3/1Qp2BN1/N2P2n1/2PKP1PP/R4B1R w k - 2 20
FEN state: 2bqkb1r/r4ppp/p2p4/3np3/1Qp2BN1/N2P2n1/2PKP1PP/R4B1R w k - 2 20 ; Best move: b4c4
The current state of the chess board is: Black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black rook at a7, black pawn at f7, black pawn at g7 and black pawn at h7. Black pawn at a6 and black pawn at d6. Black knight at d5 and black pawn at e5. White queen at b4, black pawn at c4, white bishop at f4 and white knight at g4. White knight at a3, white pawn at d3 and black knight at g3. White pawn at c2, white king at d2, white pawn at e2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 2. Full move number is 20. White to move.