Chessqueen wrote: ↑Thu Jun 29, 2023 10:46 am
Uri Blass wrote: ↑Thu Jun 29, 2023 10:24 am
Chessqueen wrote: ↑Thu Jun 29, 2023 6:19 am
Dann Corbit wrote: ↑Thu Jun 29, 2023 5:04 am
The following moves draw:
Rf5
Rh3
Ng7
Nc5
Kf6
Kf5
Kf7
as proven by the nalimov tablebase files at:
https://www.k4it.de/?topic=egtb&lang=en
Therefore, it is completely irrelevant which of the above drawing moves is played.
All lead (provably) to a draw.
Mr. Dann, Most top GMs will select Rh3+ since it draws in 2 moves, therefore, it is NOT a matter of how many different moves can lead into a draw
It may be better from the engine's point of view to make the game as long as possible when it is a draw because the opponent may lose on time so drawing in 2 moves by this reason is worse than drawing in 50 moves.
It all depend on the time left for both engines, if the engine that can draw with 2 moves only has 1 second left on his clock it is logical to draw with 2 moves, but if it has more than 1 minute left and the opponent only has 1 second left it is logical to make the game as long as possible.
NOTE: The reason why I believe it is illogical to prolong the game to 50 moves is because I do NOT use tablebases and never ever had, and for some engines to select the longest draw is very illogical
I gave Dragon 3.2, Koivisto, and many other top engines 1 second per move and they all selected Rh3+ to draw in 2 moves without using tablebases
[pgn][Event "It is all about time"]
[Date "2023.06.29"]
[Round "?"]
[White "Koivisto_9.2-windows-avx2-pgo"]
[Black "Dragon-3.2-64bit-avx2"]
[Result "1/2-1/2"]
[BlackElo "3510"]
[Time "06:07:35"]
[WhiteElo "3530"]
[TimeControl "0+1"]
[SetUp "1"]
[FEN "8/8/4N1K1/7R/8/4qk2/8/8 w - - 0 1"]
[Termination "normal"]
[PlyCount "4"]
[WhiteType "program"]
[BlackType "program"]
1. Rh3+ {(Rh5-h3+ Kf3-f2 Rh3xe3 Kf2xe3 Kg6-f5 Ke3-f3 Ne6-c5 Kf3-e3 Kf5-e5
Ke3-d2 Ke5-d4 Kd2-c2 Nc5-e6 Kc2-b2 Kd4-d3 Kb2-b3 Ne6-c5+ Kb3-b4 Kd3-d4
Kb4-b5 Nc5-d3 Kb5-a4 Kd4-c3 Ka4-a5 Nd3-e5 Ka5-b5 Ne5-g6 Kb5-c5 Ng6-h8
Kc5-d5 Nh8-f7 Kd5-e4 Nf7-d6+ Ke4-d5 Nd6-c4 Kd5-e4 Nc4-b2 Ke4-e3 Nb2-d1+
Ke3-e2 Kc3-c2) +0.47/36 0} Kf2 {(Kf3-f2 Rh3xe3 Kf2xe3) 0.00/49 0} 2. Rxe3
{(Rh3xe3 Kf2xe3 Kg6-f5 Ke3-d3 Kf5-f4 Kd3-c3 Kf4-e4 Kc3-c4 Ke4-e3 Kc4-c3
Ne6-f4 Kc3-b3 Ke3-d4 Kb3-b2 Kd4-d3 Kb2-c1 Nf4-e2+ Kc1-b2 Ne2-d4 Kb2-b1
Kd3-d2 Kb1-b2 Nd4-f3 Kb2-b1 Kd2-c3 Kb1-c1 Nf3-d4 Kc1-d1 Kc3-d3 Kd1-e1
Nd4-e6 Ke1-d1 Ne6-f8 Kd1-c1 Kd3-c3 Kc1-b1 Nf8-e6 Kb1-c1 Kc3-d4) +0.47/37 1}
Kxe3 {(Kf2xe3) 0.00/99 0 Insufficient material} *[/pgn]
