statistics about mates from tablebases

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Uri Blass
Posts: 10281
Joined: Thu Mar 09, 2006 12:37 am
Location: Tel-Aviv Israel

statistics about mates from tablebases

Post by Uri Blass »

[d]8/8/k7/8/KR6/Rn6/8/8 w - - 0 1

The following position is double mate in 1 (side that begin has a single solution for mate in 1.

same for the following position

[d]7q/8/8/8/Q7/K7/8/k7 w - - 0 1

I wonder what is the number of double mate positions in different tablebases
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Arpad Rusz
Posts: 273
Joined: Sat Apr 17, 2010 2:34 pm
Location: Budapest

Re: statistics about mates from tablebases

Post by Arpad Rusz »

I can find the double mates with the help of SEE but only if both moves are the only winning moves. So your KQvKQ example is missing from this list (176 positions) because of the dual win 1.Kb3+.

8/8/8/8/q7/k7/5Q2/K7 w - - 0 1
8/8/1Q6/8/8/8/8/K1kq4 w - - 0 1
8/8/8/8/q7/k7/5Q2/1K6 w - - 0 1
8/8/8/8/q7/k7/6Q1/1K6 w - - 0 1
8/8/8/8/q7/k7/7Q/1K6 w - - 0 1
8/8/8/4Q3/q7/k7/8/1K6 w - - 0 1
8/8/1Q6/8/q7/k7/8/1K6 w - - 0 1
8/8/5Q2/8/q7/k7/8/1K6 w - - 0 1
8/1Q6/8/8/q7/k7/8/1K6 w - - 0 1
8/6Q1/8/8/q7/k7/8/1K6 w - - 0 1
1Q6/8/8/8/q7/k7/8/1K6 w - - 0 1
7Q/8/8/8/q7/k7/8/1K6 w - - 0 1
8/8/1q6/8/8/8/8/k1KQ4 w - - 0 1
8/8/8/8/8/8/k4q2/2KQ4 w - - 0 1
8/8/8/8/8/8/k5q1/2KQ4 w - - 0 1
8/8/8/8/8/8/k6q/2KQ4 w - - 0 1
8/8/8/4q3/8/8/k7/2KQ4 w - - 0 1
8/8/1q6/8/8/8/k7/2KQ4 w - - 0 1
8/8/5q2/8/8/8/k7/2KQ4 w - - 0 1
8/1q6/8/8/8/8/k7/2KQ4 w - - 0 1
8/6q1/8/8/8/8/k7/2KQ4 w - - 0 1
1q6/8/8/8/8/8/k7/2KQ4 w - - 0 1
7q/8/8/8/8/8/k7/2KQ4 w - - 0 1
8/8/6q1/8/8/8/8/4QK1k w - - 0 1
8/8/8/8/8/8/q6k/4QK2 w - - 0 1
8/8/8/8/8/8/1q5k/4QK2 w - - 0 1
8/8/8/8/8/8/2q4k/4QK2 w - - 0 1
8/8/8/3q4/8/8/7k/4QK2 w - - 0 1
8/8/2q5/8/8/8/7k/4QK2 w - - 0 1
8/8/6q1/8/8/8/7k/4QK2 w - - 0 1
8/1q6/8/8/8/8/7k/4QK2 w - - 0 1
8/6q1/8/8/8/8/7k/4QK2 w - - 0 1
q7/8/8/8/8/8/7k/4QK2 w - - 0 1
6q1/8/8/8/8/8/7k/4QK2 w - - 0 1
8/8/8/8/7q/7k/Q7/6K1 w - - 0 1
8/8/8/8/7q/7k/1Q6/6K1 w - - 0 1
8/8/8/8/7q/7k/2Q5/6K1 w - - 0 1
8/8/8/3Q4/7q/7k/8/6K1 w - - 0 1
8/8/2Q5/8/7q/7k/8/6K1 w - - 0 1
8/8/6Q1/8/7q/7k/8/6K1 w - - 0 1
8/1Q6/8/8/7q/7k/8/6K1 w - - 0 1
8/6Q1/8/8/7q/7k/8/6K1 w - - 0 1
Q7/8/8/8/7q/7k/8/6K1 w - - 0 1
6Q1/8/8/8/7q/7k/8/6K1 w - - 0 1
8/8/8/8/7q/7k/2Q5/7K w - - 0 1
8/8/6Q1/8/8/8/8/4qk1K w - - 0 1
8/8/8/8/8/8/K4Q2/2kq4 w - - 0 1
8/8/8/8/8/8/K5Q1/2kq4 w - - 0 1
8/8/8/8/8/8/K6Q/2kq4 w - - 0 1
8/8/8/4Q3/8/8/K7/2kq4 w - - 0 1
8/8/1Q6/8/8/8/K7/2kq4 w - - 0 1
8/8/5Q2/8/8/8/K7/2kq4 w - - 0 1
8/1Q6/8/8/8/8/K7/2kq4 w - - 0 1
8/6Q1/8/8/8/8/K7/2kq4 w - - 0 1
1Q6/8/8/8/8/8/K7/2kq4 w - - 0 1
7Q/8/8/8/8/8/K7/2kq4 w - - 0 1
8/8/8/8/8/8/Q6K/4qk2 w - - 0 1
8/8/8/8/8/8/1Q5K/4qk2 w - - 0 1
8/8/8/8/8/8/2Q4K/4qk2 w - - 0 1
8/8/8/3Q4/8/8/7K/4qk2 w - - 0 1
8/8/2Q5/8/8/8/7K/4qk2 w - - 0 1
8/8/6Q1/8/8/8/7K/4qk2 w - - 0 1
8/1Q6/8/8/8/8/7K/4qk2 w - - 0 1
8/6Q1/8/8/8/8/7K/4qk2 w - - 0 1
Q7/8/8/8/8/8/7K/4qk2 w - - 0 1
6Q1/8/8/8/8/8/7K/4qk2 w - - 0 1
8/8/8/8/Q7/K7/5q2/k7 w - - 0 1
8/8/8/8/Q7/K7/5q2/1k6 w - - 0 1
8/8/8/8/Q7/K7/6q1/1k6 w - - 0 1
8/8/8/8/Q7/K7/7q/1k6 w - - 0 1
8/8/8/4q3/Q7/K7/8/1k6 w - - 0 1
8/8/1q6/8/Q7/K7/8/1k6 w - - 0 1
8/8/5q2/8/Q7/K7/8/1k6 w - - 0 1
8/1q6/8/8/Q7/K7/8/1k6 w - - 0 1
8/6q1/8/8/Q7/K7/8/1k6 w - - 0 1
1q6/8/8/8/Q7/K7/8/1k6 w - - 0 1
7q/8/8/8/Q7/K7/8/1k6 w - - 0 1
8/8/8/8/7Q/7K/q7/6k1 w - - 0 1
8/8/8/8/7Q/7K/1q6/6k1 w - - 0 1
8/8/8/8/7Q/7K/2q5/6k1 w - - 0 1
8/8/8/3q4/7Q/7K/8/6k1 w - - 0 1
8/8/2q5/8/7Q/7K/8/6k1 w - - 0 1
8/8/6q1/8/7Q/7K/8/6k1 w - - 0 1
8/1q6/8/8/7Q/7K/8/6k1 w - - 0 1
8/6q1/8/8/7Q/7K/8/6k1 w - - 0 1
q7/8/8/8/7Q/7K/8/6k1 w - - 0 1
6q1/8/8/8/7Q/7K/8/6k1 w - - 0 1
8/8/8/8/7Q/7K/2q5/7k w - - 0 1
k7/5q2/K7/Q7/8/8/8/8 w - - 0 1
1k6/8/K7/Q7/8/8/8/1q6 w - - 0 1
1k6/8/K7/Q7/8/8/8/7q w - - 0 1
1k6/8/K7/Q7/8/8/1q6/8 w - - 0 1
1k6/8/K7/Q7/8/8/6q1/8 w - - 0 1
1k6/8/K7/Q7/8/1q6/8/8 w - - 0 1
1k6/8/K7/Q7/8/5q2/8/8 w - - 0 1
1k6/8/K7/Q7/4q3/8/8/8 w - - 0 1
1k6/5q2/K7/Q7/8/8/8/8 w - - 0 1
1k6/6q1/K7/Q7/8/8/8/8 w - - 0 1
1k6/7q/K7/Q7/8/8/8/8 w - - 0 1
6k1/8/7K/7Q/8/8/8/q7 w - - 0 1
6k1/8/7K/7Q/8/8/8/6q1 w - - 0 1
6k1/8/7K/7Q/8/8/1q6/8 w - - 0 1
6k1/8/7K/7Q/8/8/6q1/8 w - - 0 1
6k1/8/7K/7Q/8/2q5/8/8 w - - 0 1
6k1/8/7K/7Q/8/6q1/8/8 w - - 0 1
6k1/8/7K/7Q/3q4/8/8/8 w - - 0 1
6k1/q7/7K/7Q/8/8/8/8 w - - 0 1
6k1/1q6/7K/7Q/8/8/8/8 w - - 0 1
6k1/2q5/7K/7Q/8/8/8/8 w - - 0 1
7k/2q5/7K/7Q/8/8/8/8 w - - 0 1
2kq4/K7/8/8/8/8/8/1Q6 w - - 0 1
2kq4/K7/8/8/8/8/8/7Q w - - 0 1
2kq4/K7/8/8/8/8/1Q6/8 w - - 0 1
2kq4/K7/8/8/8/8/6Q1/8 w - - 0 1
2kq4/K7/8/8/8/1Q6/8/8 w - - 0 1
2kq4/K7/8/8/8/5Q2/8/8 w - - 0 1
2kq4/K7/8/8/4Q3/8/8/8 w - - 0 1
2kq4/K4Q2/8/8/8/8/8/8 w - - 0 1
2kq4/K5Q1/8/8/8/8/8/8 w - - 0 1
2kq4/K6Q/8/8/8/8/8/8 w - - 0 1
4qk2/7K/8/8/8/8/8/Q7 w - - 0 1
4qk2/7K/8/8/8/8/8/6Q1 w - - 0 1
4qk2/7K/8/8/8/8/1Q6/8 w - - 0 1
4qk2/7K/8/8/8/8/6Q1/8 w - - 0 1
4qk2/7K/8/8/8/2Q5/8/8 w - - 0 1
4qk2/7K/8/8/8/6Q1/8/8 w - - 0 1
4qk2/7K/8/8/3Q4/8/8/8 w - - 0 1
4qk2/Q6K/8/8/8/8/8/8 w - - 0 1
4qk2/1Q5K/8/8/8/8/8/8 w - - 0 1
4qk2/2Q4K/8/8/8/8/8/8 w - - 0 1
K1kq4/8/8/8/8/1Q6/8/8 w - - 0 1
K7/5Q2/k7/q7/8/8/8/8 w - - 0 1
1K6/8/k7/q7/8/8/8/1Q6 w - - 0 1
1K6/8/k7/q7/8/8/8/7Q w - - 0 1
1K6/8/k7/q7/8/8/1Q6/8 w - - 0 1
1K6/8/k7/q7/8/8/6Q1/8 w - - 0 1
1K6/8/k7/q7/8/1Q6/8/8 w - - 0 1
1K6/8/k7/q7/8/5Q2/8/8 w - - 0 1
1K6/8/k7/q7/4Q3/8/8/8 w - - 0 1
1K6/5Q2/k7/q7/8/8/8/8 w - - 0 1
1K6/6Q1/k7/q7/8/8/8/8 w - - 0 1
1K6/7Q/k7/q7/8/8/8/8 w - - 0 1
2KQ4/k7/8/8/8/8/8/1q6 w - - 0 1
2KQ4/k7/8/8/8/8/8/7q w - - 0 1
2KQ4/k7/8/8/8/8/1q6/8 w - - 0 1
2KQ4/k7/8/8/8/8/6q1/8 w - - 0 1
2KQ4/k7/8/8/8/1q6/8/8 w - - 0 1
2KQ4/k7/8/8/8/5q2/8/8 w - - 0 1
2KQ4/k7/8/8/4q3/8/8/8 w - - 0 1
2KQ4/k4q2/8/8/8/8/8/8 w - - 0 1
2KQ4/k5q1/8/8/8/8/8/8 w - - 0 1
2KQ4/k6q/8/8/8/8/8/8 w - - 0 1
k1KQ4/8/8/8/8/1q6/8/8 w - - 0 1
4QK2/7k/8/8/8/8/8/q7 w - - 0 1
4QK2/7k/8/8/8/8/8/6q1 w - - 0 1
4QK2/7k/8/8/8/8/1q6/8 w - - 0 1
4QK2/7k/8/8/8/8/6q1/8 w - - 0 1
4QK2/7k/8/8/8/2q5/8/8 w - - 0 1
4QK2/7k/8/8/8/6q1/8/8 w - - 0 1
4QK2/7k/8/8/3q4/8/8/8 w - - 0 1
4QK2/q6k/8/8/8/8/8/8 w - - 0 1
4QK2/1q5k/8/8/8/8/8/8 w - - 0 1
4QK2/2q4k/8/8/8/8/8/8 w - - 0 1
4QK1k/8/8/8/8/6q1/8/8 w - - 0 1
6K1/8/7k/7q/8/8/8/Q7 w - - 0 1
6K1/8/7k/7q/8/8/8/6Q1 w - - 0 1
6K1/8/7k/7q/8/8/1Q6/8 w - - 0 1
6K1/8/7k/7q/8/8/6Q1/8 w - - 0 1
6K1/8/7k/7q/8/2Q5/8/8 w - - 0 1
6K1/8/7k/7q/8/6Q1/8/8 w - - 0 1
6K1/8/7k/7q/3Q4/8/8/8 w - - 0 1
6K1/Q7/7k/7q/8/8/8/8 w - - 0 1
6K1/1Q6/7k/7q/8/8/8/8 w - - 0 1
6K1/2Q5/7k/7q/8/8/8/8 w - - 0 1
4qk1K/8/8/8/8/6Q1/8/8 w - - 0 1
7K/2Q5/7k/7q/8/8/8/8 w - - 0 1
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Dann Corbit
Posts: 12540
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: statistics about mates from tablebases

Post by Dann Corbit »

17,633 exactly reversible mates (IOW, if the side to move changes, it is mate for the other side in the exact same number of moves):

https://drive.google.com/open?id=1FIEo2 ... 9W6bV4suk-

I was going to attach it, but the forum software said it was too big.

Most of these are not tablebase mates.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Dann Corbit
Posts: 12540
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: statistics about mates from tablebases

Post by Dann Corbit »

This is how I found them:

Code: Select all

select * from Epd a, Epd b 
where  a.Epd LIKE '% w %' 
AND b.Epd LIKE '% b %' 
AND LEFT(a.Epd, CHARINDEX(' w ', a.Epd) - 1) = LEFT(b.Epd, CHARINDEX(' b ', b.Epd) - 1) 
and a.dm = b.dm
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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