r1bk3r/pp1pq2p/P4p1n/2Q1p2P/1b2P1P1/1B1P1P1p/3P4/RN2KR2 b Q - 0 21
FEN state: r1bk3r/pp1pq2p/P4p1n/2Q1p2P/1b2P1P1/1B1P1P1p/3P4/RN2KR2 b Q - 0 21 ; Best move: e7c5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7, black queen at e7 and black pawn at h7. White pawn at a6, black pawn at f6 and black knight at h6. White queen at c5, black pawn at e5 and white pawn at h5. Black bishop at b4, white pawn at e4 and white pawn at g4. White bishop at b3, white pawn at d3, white pawn at f3 and black pawn at h3. White pawn at d2. White rook at a1, white knight at b1, white king at e1 and white rook at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.