r1b1kbn1/p5pr/4pp2/1pppP1Np/1q1B2P1/P2P2NP/2PQ1P2/1R2KB1R b K - 2 18
FEN state: r1b1kbn1/p5pr/4pp2/1pppP1Np/1q1B2P1/P2P2NP/2PQ1P2/1R2KB1R b K - 2 18 ; Best move: b4b1
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at g7 and black rook at h7. Black pawn at e6 and black pawn at f6. Black pawn at b5, black pawn at c5, black pawn at d5, white pawn at e5, white knight at g5 and black pawn at h5. Black queen at b4, white bishop at d4 and white pawn at g4. White pawn at a3, white pawn at d3, white knight at g3 and white pawn at h3. White pawn at c2, white queen at d2 and white pawn at f2. White rook 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 2. Full move number is 18. Black to move.