r1b1k1nr/ppp4p/2np4/4ppp1/1P2P1P1/bqNP3P/2PBBPN1/R2QK2R b KQkq - 2 13
FEN state: r1b1k1nr/ppp4p/2np4/4ppp1/1P2P1P1/bqNP3P/2PBBPN1/R2QK2R b KQkq - 2 13 ; Best move: b3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at c7 and black pawn at h7. Black knight at c6 and black pawn at d6. Black pawn at e5, black pawn at f5 and black pawn at g5. White pawn at b4, white pawn at e4 and white pawn at g4. Black bishop at a3, black queen at b3, white knight at c3, white pawn at d3 and white pawn at h3. White pawn at c2, white bishop at d2, white bishop at e2, white pawn at f2 and white knight at g2. White rook at a1, white queen at d1, white king at e1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 2. Full move number is 13. Black to move.