Where to swap (y) - Revision history

Hexanna: flip red/blue convention, for consistency with hex pages

2026-06-21T02:47:22Z

flip red/blue convention, for consistency with hex pages

Hexanna: switch to shading and reorganize section headers, for consistency

2026-06-21T02:42:24Z

switch to shading and reorganize section headers, for consistency

Selinger: Removed reference to "star-marked" hexes.

2021-01-19T01:42:31Z

Removed reference to "star-marked" hexes.

Selinger: Converted to new hexboard diagrams

2021-01-19T01:41:43Z

Converted to new hexboard diagrams

Show changes

Isometry: Completed Master Y Size 6

2020-01-09T19:33:19Z

Completed Master Y Size 6

Isometry at 11:24, 20 October 2016

2016-10-20T11:24:34Z

Isometry at 05:27, 31 August 2016

2016-08-31T05:27:44Z

Zamunda: Minor update

2011-12-07T17:50:15Z

Minor update

Zamunda: Minor edit

2011-12-07T08:59:16Z

Minor edit

Zamunda: Cut down on details in newest edit

2011-12-06T20:10:15Z

Cut down on details in newest edit

@@ Line 1: / Line 1: @@
-* The red marked hexes should not be swapped.
+* The red marked hexes should be swapped.
-* The blue marked hexes should be swapped.
+* The blue marked hexes should not be swapped.
 == Regular Y ==
@@ Line 9: / Line 9: @@
    edges="none"
    visible="area(a2,b2,b1)"
-   contents="S blue:all"
+   contents="S red:all"
    />
@@ Line 17: / Line 17: @@
    edges="none"
    visible="area(a3,c3,c1)"
-   contents="S red:all blue:(b2 b3 c2)"
+   contents="S blue:all red:(b2 b3 c2)"
    />
@@ Line 25: / Line 25: @@
    edges="none"
    visible="area(a4,d4,d1)"
-   contents="S blue:all red:(a4 d4 d1)"
+   contents="S red:all blue:(a4 d4 d1)"
    />
@@ Line 33: / Line 33: @@
    edges="none"
    visible="area(a5,e5,e1)"
-   contents="S red:all blue:area(d3,c4,d4)"
+   contents="S blue:all red:area(d3,c4,d4)"
    />
@@ Line 41: / Line 41: @@
    edges="none"
    visible="area(a6,f6,f1)"
-   contents="S red:all blue:area(d4,d5,e4)"
+   contents="S blue:all red:area(d4,d5,e4)"
    />
@@ Line 49: / Line 49: @@
    edges="none"
    visible="area(a7,g7,g1)"
-   contents="S red:all blue:area(c6,f6,f3)"
+   contents="S blue:all red:area(c6,f6,f3)"
    />
@@ Line 57: / Line 57: @@
    edges="none"
    visible="area(a8,h8,h1)"
-   contents="S red:all blue:(f4--f7,g4--d7,d6--g6)"
+   contents="S blue:all red:(f4--f7,g4--d7,d6--g6)"
    />
@@ Line 65: / Line 65: @@
    edges="none"
    visible="area(a9,i9,i1)"
-   contents="S red:all blue:area(g5,g7,e7)"
+   contents="S blue:all red:area(g5,g7,e7)"
    />
@@ Line 73: / Line 73: @@
    edges="none"
    visible="area(a10,j10,j1)"
-   contents="S red:all none:area(e5,e11,k5) blue:area(f7,f8,g8,h7,h6,g6)"
+   contents="S blue:all none:area(e5,e11,k5) red:area(f7,f8,g8,h7,h6,g6)"
    />
@@ Line 85: / Line 85: @@
 In Master Y, the first player places one piece on the board, and each subsequent move consists of placing two pieces on the board.
-*the red marked hexes are losing first moves
+*the red marked hexes are winning first moves
-*the blue marked hexes are winning first moves
+*the blue marked hexes are losing first moves
 === Size 2 ===
@@ Line 93: / Line 93: @@
    edges="none"
    visible="area(a2,b2,b1)"
-   contents="S red:all"
+   contents="S blue:all"
    />
@@ Line 101: / Line 101: @@
    edges="none"
    visible="area(a3,c3,c1)"
-   contents="S red:all blue:area(b3,c2,b2)"
+   contents="S blue:all red:area(b3,c2,b2)"
    />
@@ Line 109: / Line 109: @@
    edges="none"
    visible="area(a4,d4,d1)"
-   contents="S red:all blue:c3"
+   contents="S blue:all red:c3"
    />
@@ Line 117: / Line 117: @@
    edges="none"
    visible="area(a5,e5,e1)"
-   contents="S red:all"
+   contents="S blue:all"
    />
@@ Line 125: / Line 125: @@
    edges="none"
    visible="area(a6,f6,f1)"
-   contents="S red:all blue:area(d4,d5,e4)"
+   contents="S blue:all red:area(d4,d5,e4)"
    />

@@ Line 2: / Line 2: @@
 * The blue marked hexes should be swapped.
-=== Regular Y / Size 2===
+== Regular Y ==
 <hexboard size="2x2"
    coords="none"
    edges="none"
    visible="area(a2,b2,b1)"
-   contents="B all"
+   contents="S blue:all"
    />
-=== Regular Y / Size 3===
+=== Size 3 ===
 <hexboard size="3x3"
    coords="none"
    edges="none"
    visible="area(a3,c3,c1)"
-   contents="R all B b2 b3 c2"
+   contents="S red:all blue:(b2 b3 c2)"
    />
-=== Regular Y / Size 4===
+=== Size 4 ===
 <hexboard size="4x4"
    coords="none"
    edges="none"
    visible="area(a4,d4,d1)"
-   contents="B all R a4 d4 d1"
+   contents="S blue:all red:(a4 d4 d1)"
    />
-=== Regular Y / Size 5===
+=== Size 5 ===
 <hexboard size="5x5"
    coords="none"
    edges="none"
    visible="area(a5,e5,e1)"
-   contents="R all B area(d3,c4,d4)"
+   contents="S red:all blue:area(d3,c4,d4)"
    />
-=== Regular Y / Size 6===
+=== Size 6 ===
 <hexboard size="6x6"
    coords="none"
    edges="none"
    visible="area(a6,f6,f1)"
-   contents="R all B area(d4,d5,e4)"
+   contents="S red:all blue:area(d4,d5,e4)"
    />
-=== Regular Y / Size 7===
+=== Size 7 ===
 <hexboard size="7x7"
    coords="none"
    edges="none"
    visible="area(a7,g7,g1)"
-   contents="R all B area(c6,f6,f3)"
+   contents="S red:all blue:area(c6,f6,f3)"
    />
-=== Regular Y / Size 8===
+=== Size 8 ===
 <hexboard size="8x8"
    coords="none"
    edges="none"
    visible="area(a8,h8,h1)"
-   contents="R all B f4--f7,g4--d7,d6--g6"
+   contents="S red:all blue:(f4--f7,g4--d7,d6--g6)"
    />
-=== Regular Y / Size 9===
+=== Size 9 ===
 <hexboard size="9x9"
    coords="none"
    edges="none"
    visible="area(a9,i9,i1)"
-   contents="R all B area(g5,g7,e7)"
+   contents="S red:all blue:area(g5,g7,e7)"
    />
-=== Regular Y / Size 10===
+=== Size 10 ===
 <hexboard size="10x10"
    coords="none"
    edges="none"
    visible="area(a10,j10,j1)"
-   contents="R all E area(e5,e11,k5) B area(f7,f8,g8,h7,h6,g6)"
+   contents="S red:all none:area(e5,e11,k5) blue:area(f7,f8,g8,h7,h6,g6)"
    />
-=== Regular Y / Bent-27===
+=== Bent-27 ===
 [[Image:Y27_bent.gif]]
@@ Line 80: / Line 82: @@
 This board (on which the pieces are placed on the intersections) should be within reach for computers, but no results are known so far.
-=== Master Y===
+== Master Y ==
 In Master Y, the first player places one piece on the board, and each subsequent move consists of placing two pieces on the board.
@@ Line 86: / Line 88: @@
 *the blue marked hexes are winning first moves
-=== Master Y / Size 2===
+=== Size 2 ===
 <hexboard size="2x2"
    coords="none"
    edges="none"
    visible="area(a2,b2,b1)"
-   contents="R all"
+   contents="S red:all"
    />
-=== Master Y / Size 3===
+=== Size 3 ===
 <hexboard size="3x3"
    coords="none"
    edges="none"
    visible="area(a3,c3,c1)"
-   contents="R all B area(b3,c2,b2)"
+   contents="S red:all blue:area(b3,c2,b2)"
    />
-=== Master Y / Size 4===
+=== Size 4 ===
 <hexboard size="4x4"
    coords="none"
    edges="none"
    visible="area(a4,d4,d1)"
-   contents="R all B c3"
+   contents="S red:all blue:c3"
    />
-=== Master Y / Size 5===
+=== Size 5 ===
 <hexboard size="5x5"
    coords="none"
    edges="none"
    visible="area(a5,e5,e1)"
-   contents="R all"
+   contents="S red:all"
    />
-=== Master Y / Size 6===
+=== Size 6 ===
 <hexboard size="6x6"
    coords="none"
    edges="none"
    visible="area(a6,f6,f1)"
-   contents="R all B area(d4,d5,e4)"
+   contents="S red:all blue:area(d4,d5,e4)"
    />
-=== Master Y / Bent-27===
+=== Bent-27 ===
 [[Image:Y27_bent.gif]]

@@ Line 1: / Line 1: @@
-*the red marked hexes should not be swapped
+* The red marked hexes should not be swapped.
-*the blue marked hexes should be swapped
+* The blue marked hexes should be swapped.
-*the star marked hexes are defining the [[Y]] board.
 === Regular Y / Size 2===

@@ Line 140: / Line 140: @@
 :SSSSRR
 :SSSRRR
-:SSR__R
+:SSRBBR
-:SRR_RR
+:SRRBRR
 :RRRRRR
 </hex>

← Older revision		Revision as of 11:24, 20 October 2016
Line 150:		Line 150:

	Again, status unknown but presumably within reach for computers.		Again, status unknown but presumably within reach for computers.
		+
		+	== See also ==
		+	For corresponding information on Hex, please visit [[Small boards]].

	[[category:Y]]		[[category:Y]]

@@ Line 72: / Line 72: @@
 :SSSSSSRRR
 :SSSSSRRRR
-:SSSS_RBR_
+:SSSSRRBRR
 :SSSRRBBRR
 :SSRRBBBRR
 :SRRRRRRRR
-:RRRR_RRRR
+:RRRRRRRRR
 </hex>
 === Regular Y / Size 10===
 <hex> C10 R10
 :SSSSSSSSSR
-:SSSSSSSS__
+:SSSSSSSSRR
-:SSSSSSS___
+:SSSSSSSRRR
-:SSSSSS____
+:SSSSSSRRRR
 :SSSSS_____
-:SSSS______
+:SSSS__BB__
-:SSS___B___
+:SSSR_BBB_R
-:SS________
+:SSRR_BB_RR
-:S_________
+:SRRR___RRR
-:R________R
+:RRRR__RRRR
 </hex>

@@ Line 137: / Line 137: @@
 <hex> C9 R9
 :SSSSSSSSP
-:SSSSSSS__
+:SSSSSSS_P
-:SSSSSS___
+:SSSSSS__P
 :SSSSS____
 :SSSS_____
 :SSSPP_R__
-:SSPP_____
+:SSPP____P
-:SPPPP____
+:SPPPP___P
 :PPPPB___P
 </hex>

@@ Line 101: / Line 101: @@
 :SSS______
 :SS___B___
-:S___PP___
+:S________
 :____B____
 </hex>
-If Red plays here, Blue wins fairly easily with this continuation. He can regard the two marked cells as miai (if Red takes one of them, Blue takes the other one).
+If Red plays here, Blue wins easily with this continuation.
@@ Line 115: / Line 115: @@
 :SSS______
 :SS___BR__
-:S___PP___
+:S________
 :____B____
 </hex>
-The same move works for Blue if Red plays here instead. The win is not quite as simple in this case; in particular, Blue may have to play elsewhere if Red takes one of the marked cells.
+This red move is somewhat better, but Blue can win with the same response.