Difference between revisions of "Tom's move"
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| + | == Introduction == | ||
| + | |||
| + | '''Tom's move''' is a trick that enables a player to break through a second [[ladder]]. Its name originates from player [[User:Tom239|Tom239]] who devised it during a game (against dj11, on 15 December 2002) on [[Playsite]]. This was not its first use ever, just how it came to be known among hex players on Playsite. | ||
| + | |||
| + | == Minimal example == | ||
In this diagram [[Red (player)|Red]] wants to connect to the bottom edge. | In this diagram [[Red (player)|Red]] wants to connect to the bottom edge. | ||
| − | <hex> | + | <hex>R6 C9 Q1 |
| + | Va5 Va4 Vd3 Vb2 Ha6 Hb4 Hc3 Hd2 He1 Hf1 Hg1 Hh1 Hi1 Hh2 Hi2 Hi3</hex> | ||
It looks impossible to use the single stone on the [[fourth row]] as a [[ladder escape]]. How can it be done? By using '''Tom's move''': | It looks impossible to use the single stone on the [[fourth row]] as a [[ladder escape]]. How can it be done? By using '''Tom's move''': | ||
| Line 7: | Line 13: | ||
He [[Push (ladder)|pushes]] the ladder until he is right underneath it, and then he plays at 5. | He [[Push (ladder)|pushes]] the ladder until he is right underneath it, and then he plays at 5. | ||
| − | <hex> | + | <hex>R6 C9 Q1 |
| − | N:on | + | Va5 Va4 Vd3 Vb2 Ha6 Hb4 Hc3 Hd2 He1 Hf1 Hg1 Hh1 Hi1 Hh2 Hi2 Hi3 |
| + | N:on Vb5 Hb6 Vc5 Hc6 Vf4 +e5</hex> | ||
Now the situation is completely identical to that in the [[Tips_and_tricks#Double_ladder_on_2nd_line_escape|Double ladder on 2nd line Escape]]. Blue's natural [[defense]] is to play at (+). | Now the situation is completely identical to that in the [[Tips_and_tricks#Double_ladder_on_2nd_line_escape|Double ladder on 2nd line Escape]]. Blue's natural [[defense]] is to play at (+). | ||
| − | <hex> | + | <hex>R6 C9 Q1 |
| − | N:on | + | Va5 Va4 Vd3 Vb2 Ha6 Hb4 Hc3 Hd2 He1 Hf1 Hg1 Hh1 Hi1 Hh2 Hi2 Hi3 |
| + | Vb5 Hb6 Vc5 Hc6 Vf4 Sd5 Sf2 | ||
| + | N:on He5 Vg3</hex> | ||
| + | |||
| + | Now Red´s two pieces at g3 and f4 are [[Connection|connected]] to the [[bottom edge]] via [[edge template IV2b]], and his [[ladder]] can thus connect to the bottom edge in [[Multiple threats|two different ways]], by playing in either of the starred [[Hex (board element)|cells]]. | ||
| − | + | [[category:ladder]] | |
| + | [[category:Advanced Strategy]] | ||
Revision as of 15:58, 15 May 2020
Introduction
Tom's move is a trick that enables a player to break through a second ladder. Its name originates from player Tom239 who devised it during a game (against dj11, on 15 December 2002) on Playsite. This was not its first use ever, just how it came to be known among hex players on Playsite.
Minimal example
In this diagram Red wants to connect to the bottom edge.
It looks impossible to use the single stone on the fourth row as a ladder escape. How can it be done? By using Tom's move:
He pushes the ladder until he is right underneath it, and then he plays at 5.
Now the situation is completely identical to that in the Double ladder on 2nd line Escape. Blue's natural defense is to play at (+).
Now Red´s two pieces at g3 and f4 are connected to the bottom edge via edge template IV2b, and his ladder can thus connect to the bottom edge in two different ways, by playing in either of the starred cells.
