r3kbr1/1b2pp2/p6n/1p1p2pp/N1q2P1P/P1n1P1PN/2P4R/R1BKQB2 w q - 6 20
FEN state: r3kbr1/1b2pp2/p6n/1p1p2pp/N1q2P1P/P1n1P1PN/2P4R/R1BKQB2 w q - 6 20 ; Best move: a4c3
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8 and black rook at g8. Black bishop at b7, black pawn at e7 and black pawn at f7. Black pawn at a6 and black knight at h6. Black pawn at b5, black pawn at d5, black pawn at g5 and black pawn at h5. White knight at a4, black queen at c4, white pawn at f4 and white pawn at h4. White pawn at a3, black knight at c3, white pawn at e3, white pawn at g3 and white knight at h3. White pawn at c2 and white rook at h2. White rook at a1, white bishop at c1, white king at d1, white queen at e1 and white bishop at f1. Black queenside is the only castle move available. Half move number is 6. Full move number is 20. White to move.