rn2kb2/p3p1r1/Q1p1p3/1p1pn1p1/2P1P1Pp/N4N2/1P1P1P1P/R1B2RK1 b q - 0 20
FEN state: rn2kb2/p3p1r1/Q1p1p3/1p1pn1p1/2P1P1Pp/N4N2/1P1P1P1P/R1B2RK1 b q - 0 20 ; Best move: e5f3
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at e7 and black rook at g7. White queen at a6, black pawn at c6 and black pawn at e6. Black pawn at b5, black pawn at d5, black knight at e5 and black pawn at g5. White pawn at c4, white pawn at e4, white pawn at g4 and black pawn at h4. White knight at a3 and white knight at f3. White pawn at b2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white bishop at c1, white rook at f1 and white king at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.