Losing play - Revision history

Selinger: /* References */ copy-edit

2023-10-02T02:58:46Z

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Selinger: Added a link and a reference

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Added a link and a reference

Demer: /* Strategies for losing play */ added section

2023-10-01T07:45:34Z

‎Strategies for losing play: added section

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Selinger: Added feinting as a possible strategy for losing play

2023-10-01T05:07:29Z

Added feinting as a possible strategy for losing play

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2023-10-01T04:32:22Z

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'''Losing play''' is when a player knows that they are [[optimal play|theoretically losing]], but continues the game in the hopes that the opponent will make a mistake. This typically happens when the winning player is less skilled than the losing player and may not be able to see the winning strategy.

One example of losing play is a [[handicap|handicap game]], where the stronger player is losing at the start of the game, but hopes that the opponents will make enough mistakes to tilt the game in the player's favor.

== Strategies for losing play ==

Losing play feels very different from regular play, because the player already knows that there is no winning move and therefore has no viable options to choose from. The player might be tempted to [[resigning|resign]]. The objective of losing play is to induce the opponent to make a mistake.

=== Give them enough rope ===

A common strategy for losing play is to make the situation as complicated as possible, so that the opponent will not be able to analyze it in the amount of time they have. This strategy has the gruesome name "give them enough rope". The name is derived from the proverb "Give someone enough rope, and they will hang themselves". In Hex, this can take several forms:
* ''Do not simplify.'' Don't play any moves that would unnecessarily simplify the board position and clarify the situation for your opponent. For example, if your opponent has a complicated virtual connection that uses an intricate web of double threats, don't intrude in the double threats, as it would simplify your opponent's connection. Another example is [[Efficiency#Fast_forwarding|fast forwarding]] a ladder, rather than playing it out.
* ''Give your opponent many potential responses.'' If you play a forcing move, your opponent typically only has one possible response, and you are effectively giving them no choice but to play a winning move. Instead, play a move where the opponent must choose from many potential responses. Hopefully they will pick the wrong one.
* ''Play an unexpected move.'' It often helps to play a move that your opponent did not anticipate. The opponent is forced to analyze your move from scratch, and may not have enough time to complete the analysis. Effectively you are giving them a puzzle that they may fail to solve.

=== Play a fishing move ===

A fishing move is a move that the opponent could [[foiling|foil]], but they may not know how to do so. If the game is still undecided or you are winning, playing a fishing move is a bad idea, because when the opponent foils, it worsens your position. But in losing play you literally have nothing else to lose, so you may as well try a fishing move. If you do so, try to play it as early as possible, hopefully before your opponent can see what you are doing.

== Losing play in computer Hex ==

Most [[computer Hex]] algorithms are not good at losing play. Both neural network algorithms and the more traditional alpha-beta-search algorithms are optimized to find the most promising move from a number of possibilities. However, if all available options are clearly losing, these algorithms do not have a notion of which moves are "more" losing than others. When presented with such a position, most algorithms just make random moves.

[[category: Advanced Strategy]]

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 == References ==
-* Michael H. Albert, Richard J. Nowakowski, and David Wolfe. "Lessons in Play: An Introduction to Combinatorial Game Theory". A K Peters, 2007. This book discusses strategies for losing play, and contains the phrase "give them enough rope".
+* Michael H. Albert, Richard J. Nowakowski, and David Wolfe. "Lessons in Play: An Introduction to Combinatorial Game Theory". A K Peters, 2007. This book discusses strategies for losing play (in any game, not just Hex), and contains the phrase "give them enough rope".
 [[category: Advanced Strategy]]
 [[category: Computer Hex]]

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 === Aiming for a free move ===
-If your opponent is [[intrusion|intruding]] into one of your [[virtual connection]]s, you can defend it in a way that makes it more complicated, in the hope that your opponent ends up playing a move which does not even ''threaten'' to break that connection. Your opponent doing so basically gives you a free move elsewhere.
+If your opponent is [[intrusion|intruding]] into one of your [[virtual connection]]s, you can defend it in a way that makes it more complicated, in the hope that your opponent ends up playing a move which [[Intrusion#Invalid_intrusion|does not even ''threaten'']] to break that connection. Your opponent doing so basically gives you a free move elsewhere.
 This is mainly when the opponent does not realize the [[virtual connection]] exists, so the opponent is likely to continue playing nearby, due to (if the opponent is Blue) thinking "stop Red from connecting here" rather than "gain from Red defending Red's connection here".
@@ Line 33: / Line 33: @@
 Most [[computer Hex]] algorithms are not good at losing play. Both neural network algorithms and the more traditional alpha-beta-search algorithms are optimized to find the most promising move from a number of possibilities. However, if all available options are clearly losing, these algorithms do not have a notion of which moves are "more" losing than others. When presented with such a position, most algorithms just make random moves.
 [[category: Advanced Strategy]]
 [[category: Computer Hex]]

← Older revision		Revision as of 07:45, 1 October 2023
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	A feint is different from a fishing move, because a fishing move actually does require a response, but the opponent might respond in a way that is disadvantageous for them. On the other hand, a feint is a pure bluff that the opponent could just [[tenuki\|ignore]].		A feint is different from a fishing move, because a fishing move actually does require a response, but the opponent might respond in a way that is disadvantageous for them. On the other hand, a feint is a pure bluff that the opponent could just [[tenuki\|ignore]].
		+
		+	=== Aiming for a free move ===
		+
		+	If your opponent is [[intrusion\|intruding]] into one of your [[virtual connection]]s, you can defend it in a way that makes it more complicated, in the hope that your opponent ends up playing a move which does not even ''threaten'' to break that connection. Your opponent doing so basically gives you a free move elsewhere.
		+
		+	This is mainly when the opponent does not realize the [[virtual connection]] exists, so the opponent is likely to continue playing nearby, due to (if the opponent is Blue) thinking "stop Red from connecting here" rather than "gain from Red defending Red's connection here".

	== Losing play in computer Hex ==		== Losing play in computer Hex ==

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 '''Losing play''' is when a player knows that they are [[optimal play|theoretically losing]], but continues the game in the hopes that the opponent will make a mistake. This typically happens when the winning player is less skilled than the losing player and may not be able to see the winning strategy.
-One example of losing play is a [[handicap|handicap game]], where the stronger player is losing at the start of the game, but hopes that the opponent will make enough mistakes to tilt the game in the player's favor.
+One example of losing play is a [[handicap|handicap game]], where the stronger player is losing at the start of the game, but hopes that the opponent will make enough mistakes to tilt the game in the stronger player's favor.
 == Strategies for losing play ==

@@ Line 10: / Line 10: @@
 A common strategy for losing play is to make the situation as complicated as possible, so that the opponent will not be able to analyze it in the amount of time they have. This strategy has the gruesome name "giving them enough rope". The name is derived from the proverb "Give someone enough rope, and they will hang themselves". In Hex, this can take several forms:
-* ''Do not simplify.'' Don't play any moves that would unnecessarily simplify the board position and clarify the situation for your opponent. For example, if your opponent has a complicated virtual connection that uses an intricate web of double threats, don't intrude in the double threats, as it would simplify your opponent's connection. Another example is [[Efficiency#Fast_forwarding|fast forwarding]] a ladder, rather than playing it out.
+* ''Do not simplify.'' Don't play any moves that would unnecessarily simplify the board position and clarify the situation for your opponent. For example, if your opponent has a complicated [[virtual connection]] that uses an intricate web of double threats, don't [[intrusion|intrude]] in the double threats, as it would simplify your opponent's connection. Another example is [[Efficiency#Fast_forwarding|fast forwarding]] a ladder, rather than playing it out.
-* ''Give your opponent many potential responses.'' If you play a forcing move, your opponent typically only has one possible response, and you are effectively giving them no choice but to play a winning move. Instead, play a move where the opponent must choose from many potential responses. Hopefully they will pick the wrong one.
+* ''Give your opponent many potential responses.'' If you play a [[forcing move]], your opponent typically only has one possible response, and you are effectively giving them no choice but to play a winning move. Instead, play a move where the opponent must choose from many potential responses. Hopefully they will pick the wrong one.
 * ''Play an unexpected move.'' It often helps to play a move that your opponent did not anticipate. The opponent is forced to analyze your move from scratch, and may not have enough time to complete the analysis. Effectively you are giving them a puzzle that they may fail to solve.

@@ Line 16: / Line 16: @@
 === Playing a fishing move ===
-A fishing move is a move that the opponent could [[foiling|foil]], but they may not know how to do so. If the game is still undecided or you are winning, playing a fishing move is a bad idea, because when the opponent foils, it worsens your position. But in losing play you literally have nothing else to lose, so you may as well try a fishing move. If you do so, try to play it as early as possible, hopefully before your opponent can see what you are doing.
+A fishing move is a move that the opponent could [[foiling|foil]], but they may not know how to do so. If the game is still undecided or you are winning, playing a fishing move is a bad idea, because when the opponent foils, it worsens your position. But in losing play you literally have nothing else to lose, so you may as well try a fishing move. If you do so, try to play it as early as possible, hopefully before your opponent can see through what you are doing.
 === Feinting ===

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 A ''feint'' is a fake threat, designed to get your opponent to overreact. It can be a move that looks like it might threaten your opponent's connection, without actually doing so. The hope is to goad the opponent into defending the connection anyway, [[irrelevant move|wasting]] a move. Feinting is a form of bluffing.
-A feint is different from a fishing move, because a fishing move actually does require a response, but the opponent might respond in a way that is disadvantageous for them. On the other hand, a feint is a pure bluff that the opponent could just ignore.
+A feint is different from a fishing move, because a fishing move actually does require a response, but the opponent might respond in a way that is disadvantageous for them. On the other hand, a feint is a pure bluff that the opponent could just [[tenuki|ignore]].
 == Losing play in computer Hex ==