rnbqk1n1/1ppp2p1/p5r1/4p2p/Pb4pP/2PPPP2/1P1KB3/RNB1Q1NR b q - 0 10
FEN state: rnbqk1n1/1ppp2p1/p5r1/4p2p/Pb4pP/2PPPP2/1P1KB3/RNB1Q1NR b q - 0 10 ; Best move: b4e7
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at e8 and black knight at g8. Black pawn at b7, black pawn at c7, black pawn at d7 and black pawn at g7. Black pawn at a6 and black rook at g6. Black pawn at e5 and black pawn at h5. White pawn at a4, black bishop at b4, black pawn at g4 and white pawn at h4. White pawn at c3, white pawn at d3, white pawn at e3 and white pawn at f3. White pawn at b2, white king at d2 and white bishop at e2. White rook at a1, white knight at b1, white bishop at c1, white queen at e1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.