r3k2r/p1qbp1bp/np1n1p2/3p2N1/3BN1p1/1P1PPP1P/2P5/R2K1B1R w k - 5 20
FEN state: r3k2r/p1qbp1bp/np1n1p2/3p2N1/3BN1p1/1P1PPP1P/2P5/R2K1B1R w k - 5 20 ; Best move: e4d6
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. Black pawn at a7, black queen at c7, black bishop at d7, black pawn at e7, black bishop at g7 and black pawn at h7. Black knight at a6, black pawn at b6, black knight at d6 and black pawn at f6. Black pawn at d5 and white knight at g5. White bishop at d4, white knight at e4 and black pawn at g4. White pawn at b3, white pawn at d3, white pawn at e3, white pawn at f3 and white pawn at h3. White pawn at c2. White rook at a1, white king at d1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 5. Full move number is 20. White to move.