Question re evalaution format in a pgn game

[vb4]

Following is a part of the output from a pgn game which I hope someone can explain to me. Following is a few of the evaluations I am confused by.

93. Kd5 {+M-1375/55 4s} 93... Kb4 {+M4/100 1s} 94. Qd3 {
+M-1376/55 0s (g4)} 94... Ka5 {+M3/100 0s} 95. Qb3 {+M-1377/55 0s (Kc5)} 95...
Ka6 {+M2/100 0s} 96. Kc6 {+M-1378/55 0s} 96... Ka5 {+M1/100 0s (Ka7)} 97. Qa3#
{+M-1379/55 0s} 1-0

What does this mean??

{+M-1378/55 0s}

+M-1378 ??????????????

Thanks in advance

Les

[Ajedrecista]

Hello:

Following is a part of the output from a pgn game which I hope someone can explain to me. Following is a few of the evaluations I am confused by.

93. Kd5 {+M-1375/55 4s} 93... Kb4 {+M4/100 1s} 94. Qd3 {
+M-1376/55 0s (g4)} 94... Ka5 {+M3/100 0s} 95. Qb3 {+M-1377/55 0s (Kc5)} 95...
Ka6 {+M2/100 0s} 96. Kc6 {+M-1378/55 0s} 96... Ka5 {+M1/100 0s (Ka7)} 97. Qa3#
{+M-1379/55 0s} 1-0

What does this mean??

{+M-1378/55 0s}

+M-1378 ??????????????

Thanks in advance

Les

I have some déjà-vu on the matter:

PGN notation confusion

The numbers are not exactly the same but I think that this issue has the same background. In that thread, Muller suggested the possibility of the influence of the parameter mate score in the GUI.

Regards from Spain.

Ajedrecista.

[Evert]

Looks like an integer overflow in the engine to me, or an incorrect calculation of the distance to mate.

So I'd say it's probably a bug. Which engine produced this?

[hgm]

What does this mean??

{+M-1378/55 0s}

+M-1378 ??????????????

Checkmate in minus 1378 moves (i.e. 1378 moves ago).

[vb4]

Hi Evert,

The engines were the following:

White Gull 1.2 x 64

Black Quazar 0.4 x 64

What are your thoughts?

Thx

Les