# Five in a row

Dejection
Posers and Puzzles 05 Jun '08 06:20
1. 05 Jun '08 06:20
Two players named Eks and Ohs play a game on an infinite chessboard. They place X's on O's alternatly, the aim getting five in a row horizontally or vertically. Diagonals don't count. Eks goes first. With perfect play, who wins, or is it a draw?
2. 05 Jun '08 07:41
Victor Allis showed that Gomoku is won for the first placer on a 15x15 board, but with diagonals.
3. 05 Jun '08 08:23
I thought it was proven for smaller than 15x15, but anyway, my question was without diagonals
4. 05 Jun '08 10:25
Originally posted by Dejection
Two players named Eks and Ohs play a game on an infinite chessboard. They place X's on O's alternatly, the aim getting five in a row horizontally or vertically. Diagonals don't count. Eks goes first. With perfect play, who wins, or is it a draw?
Hint: pairing strategy
5. 05 Jun '08 11:37
David, seeing as you seemed to have solved my question, why don't you try 9 in row on an infinite board, diagonals counted?
6. 06 Jun '08 02:09
Originally posted by Dejection
David, seeing as you seemed to have solved my question, why don't you try 9 in row on an infinite board, diagonals counted?
Hint: pairing strategy