r3k3/2p1qpr1/p4B1n/1p4p1/1n1pP1P1/2QP4/P1PN4/R3KBNR w q - 2 21
FEN state: r3k3/2p1qpr1/p4B1n/1p4p1/1n1pP1P1/2QP4/P1PN4/R3KBNR w q - 2 21 ; Best move: f6e7
The current state of the chess board is: Black rook at a8 and black king at e8. Black pawn at c7, black queen at e7, black pawn at f7 and black rook at g7. Black pawn at a6, white bishop at f6 and black knight at h6. Black pawn at b5 and black pawn at g5. Black knight at b4, black pawn at d4, white pawn at e4 and white pawn at g4. White queen at c3 and white pawn at d3. White pawn at a2, white pawn at c2 and white knight at d2. White rook at a1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 21. White to move.