r1b1k1r1/1p1p1p1p/n2b1q2/pp2p3/P1P1P1PP/1P2PP2/1R1N4/2BQ1R1K w q - 0 19
FEN state: r1b1k1r1/1p1p1p1p/n2b1q2/pp2p3/P1P1P1PP/1P2PP2/1R1N4/2BQ1R1K w q - 0 19 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at g8. Black pawn at b7, black pawn at d7, black pawn at f7 and black pawn at h7. Black knight at a6, black bishop at d6 and black queen at f6. Black pawn at a5, black pawn at b5 and black pawn at e5. White pawn at a4, white pawn at c4, white pawn at e4, white pawn at g4 and white pawn at h4. White pawn at b3, white pawn at e3 and white pawn at f3. White rook at b2 and white knight at d2. White bishop at c1, white queen at d1, white rook at f1 and white king at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 19. White to move.