r1b2bnr/p2pk2p/n1q1p1p1/2p2p2/1Pp2PP1/B4N1P/P2NP3/RQ2KB1R w K - 11 19
FEN state: r1b2bnr/p2pk2p/n1q1p1p1/2p2p2/1Pp2PP1/B4N1P/P2NP3/RQ2KB1R w K - 11 19 ; Best move: b4b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at d7, black king at e7 and black pawn at h7. Black knight at a6, black queen at c6, black pawn at e6 and black pawn at g6. Black pawn at c5 and black pawn at f5. White pawn at b4, black pawn at c4, white pawn at f4 and white pawn at g4. White bishop at a3, white knight at f3 and white pawn at h3. White pawn at a2, white knight at d2 and white pawn at e2. White rook at a1, white queen at b1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 11. Full move number is 19. White to move.