It gives away the queen for free, or refuses to make a "mate in 1", etc.
It's not playing chess. Nothing in the analysis can be trusted!

This is a late middlegame/early endgame involving queens and pawns, plus one
piece. There is a lot of tablebase access. Try it for yourself, if you wish.
Here's the fen. I have analyzed it to a level of 24/58 taking 12+ hours, and
the result is still nonsense!

8/1B3pk1/2Q1p3/2q1p1pp/8/6P1/5PKP/8 b - - 0 1

Analysis by Shredder704.eng (3/4/2003): [344kN/s]

47...Qd4 48.Qf3 Kg6 49.Bc6 g4 50.Qb3 f5 51.Qxe6+ Kg5 52.h3 Qa1 53.hxg4 hxg4
54.Be8 e4 55.Qe7+ Kh6 56.Kh2 Qb2
+- (1.74) Depth: 11/28 00:00:08 3427kN, tb=41
+- (1.77) Depth: 24/58 12:15:52 15245243kN, tb=13125095

Shredder 7 GUI, Athlon XP 2400+ 2GHz, 1GB RAM, hash 512MB, tablebase cache
64MB, all 3-4-5 piece tablebases

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Euc1id