r1bq1bnr/p1pp4/2n2k1p/1p3pp1/2P1p1PN/1P4R1/P1QPPP1P/RNB1KB2 b Q - 1 10
FEN state: r1bq1bnr/p1pp4/2n2k1p/1p3pp1/2P1p1PN/1P4R1/P1QPPP1P/RNB1KB2 b Q - 1 10 ; Best move: g5h4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at d7. Black knight at c6, black king at f6 and black pawn at h6. Black pawn at b5, black pawn at f5 and black pawn at g5. White pawn at c4, black pawn at e4, white pawn at g4 and white knight at h4. White pawn at b3 and white rook at g3. White pawn at a2, white queen at c2, white pawn at d2, white pawn at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 1. Full move number is 10. Black to move.