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Two-player turn-based perfect-information games, surreal numbers, impartial games and Sprague-Grundy theory, partizan games

7 votes
0 answers
469 views

A winning move for the first player in $3 \times 3 \times \omega$ Ordinal Chomp

I have been trying to analyse the game of Ordinal Chomp played on a $3 \times 3 \times \omega$ board. The rules can be found in the Wikipedia article, briefly: This game is played between two player …
5 votes

Strategy-stealing in chess

I think the real essence of the question is not so much in whether zugzwang exists in chess, but whether it exists in the first few (say 5) moves, and whether in that time white can effectively lose a …
Thomas's user avatar
  • 2,811
4 votes
0 answers
159 views

Infinite positions in 3D chomp

I've recently come back to investigating ordinal chomp. See A winning move for the first player in $3 \times 3 \times \omega$ Ordinal Chomp for a definition. I made a new discovery, that the position …
3 votes
2 answers
364 views

"L-Shaped Positions" in Chomp

In my earlier question I asked about the winning move in Ordinal Chomp played on a $3 \times 3 \times \omega$ board. So far the problem has seemed intractable. Therefore, I now consider Ordinal chomp …
1 vote

"L-Shaped Positions" in Chomp

(I put this into another answer because it was too long for a comment) I made a database of losing positions. I noticed after calculating a few positions by hand that there were some positions, like \ …
Thomas's user avatar
  • 2,811
0 votes

"L-Shaped Positions" in Chomp

After a bit more research (and a very helpful python program), I have been able to solve answer all of my questions. First, the values of (c, d) such that \begin{pmatrix}w&w&c \\ d&0&0\end{pmatrix} is …
Thomas's user avatar
  • 2,811