r2qk1r1/p2p1ppp/b1nbp2n/1pp1P3/1P4P1/B2P3P/P1P1KP2/R2Q1BNR w q - 0 12
FEN state: r2qk1r1/p2p1ppp/b1nbp2n/1pp1P3/1P4P1/B2P3P/P1P1KP2/R2Q1BNR w q - 0 12 ; Best move: e5d6
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8 and black rook at g8. Black pawn at a7, black pawn at d7, black pawn at f7, black pawn at g7 and black pawn at h7. Black bishop at a6, black knight at c6, black bishop at d6, black pawn at e6 and black knight at h6. Black pawn at b5, black pawn at c5 and white pawn at e5. White pawn at b4 and white pawn at g4. White bishop at a3, white pawn at d3 and white pawn at h3. White pawn at a2, white pawn at c2, white king at e2 and white pawn at f2. White rook at a1, white queen at d1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 12. White to move.