Mt Rubik cube 3x3x3 lc no cng c cc thnh phn sau( gm 6 mt) Upper - mt trn (U), Down - di (D), Left - tri (L), Right -phi , Front -trc (F) v Back - sau (B). Cc bc quay c bn c k hiu theo nguyn tc sau: + Ch hoa thng, tc l quay mt (UDLRFB-trn di tri phi trc sau) theo chiu kim ng h 1 gc 90 . + Nu ch hoa cng thm du tick ( ' ), ngha l quay ngc theo chiu kim ng h 1 gc 90 . + Nu l ch hoa i km theo s 2 ngha l quay mt 180 , v chiu no cng nh nhau c.

y l phn c bn nht, ngai bc c bn cn c bc quay trc gia bao gm E (Equatorngang bng), M (Middle - gia) v S (Standing - thng ng ). cng tun theo 3 quy lut nh trn.

Ngai ra cn c quay i 2 lp, tc l ngai lp ngai cng ra cn c lp k n ( c th l 1 trog 3 lp EMS) v c k hiu bng ch ci thng tun theo 3 quy tc c bn trn. Cui cng l bc lt c khi rubik theo trc X,Y hoc Z, tng ng vi cc mt R,U v F( phi, trn v trc) lm trc quay

Mt s thut ng lin quan n rubik Mnh thy trong forum ny mi ngi dng kh nhiu t ting Anh m c l nhng ngi mi chi ko phi ai cng hiu ht, do mnh tng hp cc t thng dng ti y mi ngi ko b b ng khi tham gia forum. Cc loi Cube: - Rubik's Pocket : l khi 2x2x2 - Rubik's Cube: l khi rubik 3x3x3 m ta hay chi. - Rubik's Revenge: l khi rubik 4x4x4 - Rubik's Professor: l khi rubik 5x5x5

- Square-1 hoc Cube 21: mt loi cube c kt cu v cch chi khc hn so vi cube ca rubik's. - Megaminx: mt loi cube 12 mt. Mi mt l hnh ng gic u, gm 5 corners v 5 edges. - Pyraminx: mt loi cube 4 mt. Mi mt l 1 hnh tam gic u, gm 3 corner v 3 edges, khng c center. Cc b phn ca Rubik's Cube : - Sticker: l cc ming giy mu nh nh dn ln cc rubik. - Tiles: cng l cc mu nh nh nhng ci ny cng hn ci sticker, my ming mu trn cc rubik tu cng c th c coi l 1 dng tiles. - Cubies: l cc vin hnh thnh nn khi rubik. - Center: l vin gia. - Corner: l vin gc. - Edge: l vin cnh. - Center cap: l mt ming nha nh gn ln trn center che c v dn sticker ln. - Screw : l chic inh vt trong vin center - Spring: l chic l xo cng vi screw, gip cut corner tt hn. - Core: nm trung tm rubik, dng gi cc cubies vi nhau. Thut ng lin quan n cch chi : - Breaking in: lm mn rubik, l thi gian u tin bn chi cc rubik . Trong thi gian ny cc bn khng nn lube rubik m bo kh nng n mn tt nht. - Pop: l hin tng khi ang chi rubik m 1 b phn no bt thnh lnh vng ra ngoi, ci ny m chi rubik tu th thng xuyn gp. - Cut corner: l kh nng cc rubik c th xoay c 1 hng khi hng cha thng vi nhau. V d xoay UR', khi cha xoay xong U m xoay c R' th gi l cut corner. - Lube = lubricant: l lm cch no khin cho cc rubik xoay trn hn, thng l xt silicone. - Move: l xoay 1 mt 90 hoc 180 . - Finger trick: l thao tc cc ngn tay lm cng thc mt cch lin mch. - Look ahead - nhn trc: look-ahead trong khi xoay rubik l qu trnh lc mnh xoay ko dng li nhn na m lm lin tc v trong lc lm 1 TH no ta nhn ra lun TH tip theo ta cn lm l g. Hay ni n gin l lm lin tc ko dng. - Scramble: tro rubik. - Cuber: l ngi chi rubik. - Single : l thi gian ca mt ln gii - Average : l thi gian trung bnh ca nhiu ln gii (thng l 5 hoc 12 ln) - Sub-x: Ngha l thi gian nm di x giy (average hoc single) - DNF: did not finish: khng hon thnh - Skip: l khng cn lm mt bc no , vd: skip OLL l khi lm xong F2L th lm lun PLL v hon thnh ngu nhin OLL trc cho mnh - non - skip: l khng skip Cc hng/loi Cube (xem so snh): - Rubik's: hng chnh thc ca Rubik's Cube - DIY : do it yourself: c ngha l khi mua v cc rubik ch gm nhng vin ri nhau, mnh phi t lp c, l xo... to nn cc rubik. - Eastsheen : l 1 hng sn xut rubik i Loan. - V-Cubes: l mt hng mi, c cng ngh sn xut cube t 2x2x2 n 11x11x11 (hin nay con 6x6x6 v 7x7x7 c tung ra th trng)

Cc b mn Rubik's Cube: - Speedsolve : l chi gii nhanh nht, tr ny ph bin nht - BLD = Blindfolded: l chi rubik bt mt. - OH = One-Handed: l chi mt tay - FMC = Fewest Moves Contest: l tm cch gii ngn nht c Bc Gii Rubik theo cch Fridrich Sau y l cc bc hon thnh 6 mt thng dng v mnh s hng dn theo cch ca Fridrich( mi ngi trong 4rum u thng nht dng cch ny)Mt s bn c th dng cch ca Vandenbergh,nhng anh Ngha ni 2 cch ny tng t nhau,ch hi ngc nhau thi v mi ngi u ng theo Fridrich Bc 1: CROSS y l bc lm hnh ch thp mt u tin (mt mu trng)

phn ny th gn nh khng c hng dn no c th c,cc bn nn luyn tht nhiu c cch gii ring d nh nht.Phn ny nn "t thn vn ng" 8) Bc 2: F2L (First 2 Layers) y l bc hon thnh hai tng u tin, bc ny l lm lu nht, hn nhau chnh l bc ny.

Hc F2L qua video: http://www.rubikvn.org/forum/showthread.php?tid=914 Bc 3: OLL (Orientation of the Last Layer) y l bc hon thnh mt trn cng (mt mu vng). C 57 th Orientation, y chnh l bc quan trng t beginner tr thnh expert.

Cc cng thc OLL: http://rubikvn.org/forum/Thread-OLL-57-truong-hop?pid=175890 Bc 4: PLL (Permutation of the Last Layer) y l bc xoay chuyn v tr cc vin hon thnh tng cui sao cho mt vng ko b xo trn v l bc cui,c 21 th Permutation.

21 trng hp PLL (Fix nh) Cng thc trn l to ra trng hp trong hnh.

Edge Permutations (4 cases)TH1 (ch U): R U' R U R U R U' R' U' R2

Cng thc: (R2 U) (R U R' U') (R' U') (R' U R') TH2 (ch U): R' U R' U' R' U' R' U R U R2

Cng thc: (R U' R U) (R U) (R U') (R' U' R2) TH3 (ch Z): U2 R' U' R2 U R U R' U' R U R U' R U' R'

Cng thc: *U R U R U R U R U R U R U R2 U R U *R U R U R U R U R U R U R2 U R U2 TH4 (ch H): L2 R2 D' L2 R2 U2 L2 R2 D' L2 R2

Cng thc: (M'2 U) (M'2 U2) (M'2 U) M'2

Corner Permutations (3 cases)TH 1 (ch A): R2 B2 R F R' B2 R F' R

Cng thc: x (R' U R') D2 (R U' R') D2 R2 x' TH2 (ch A): R' F R' B2 R F' R' B2 R2

Cng thc: x R2 D2 (R U R') D2 (R U' R) x' TH3 (ch E): L' B L F' L' B' L F2 R B' R' F' R B R'

Cng thc: x (R U R D) (R U R D) (R U R D) (R U R D)

J Permutations (2 cases)TH1: R U2 R' U' R U2 L' U R' U' L

Cng thc: (R U R' F') (R U R' U') (R' F) (R2 U') (R' U') TH2: R2 D R D' R F2 L' U L F2

Cng thc: (R' U L') U2 (R U' R') U2 (L R U')

R Permutations (2 cases)TH1: U' R U' B L' B' R' B L B' U' R U2 R'

Cng thc: (L U'2) (L' U'2) (L F' L' U' L U) (L F L'2 U)

TH2: U R2 F R U R U' R' F' R U2 R' U2 R

Cng thc: (R' U2) (R U2) (R' F R U R' U') (R' F' R2 U')

N Permutations (2 cases)TH1: U L U' R U2 L' U L R' U' R U2 L' U R'

Cng thc: R U' R' U l U F U' R' F' R U' R U l' U R' TH2: U R' U L' U2 R U' R' L U L' U2 R U' L

Cng thc:R U R U R F U F R U R F l U l U R

G Permutations (4 cases)TH1: F' U' F R2 D B' U B U' B D' R2

Cng thc: (R'2 u) (R' U R' U' R u') R'2 y' (R' U R) TH2: B U B' R2 D' F U' F' U F' D R2

Cng thc: (R'2 u' R U') (R U R' u R2) y (R U' R') TH3: F2 D' L U' L U L' D F2 R U' R'

Cng thc: (R U R') y' (R'2 u' R U') (R' U R' u R2) TH4: F2 D R' U R' U' R D' F2 L' U L

Cng thc: (R' U' R) y (R'2 u R' U) (R U' R u' R'2) Cch nhn bit: u tin xoay mt U a block 1x1x2 v ng v tr. Ta c 1 mt c 2 chm mu trng nhau, xoay cube a 2 chm mu v bn tri. Lc ny da vo v tr ca block 1x1x2 nm pha di, trn, phi di hay phi trn m xc nh trng hp tng ng.

The Rest (4 cases)TH1 (ch F): U R2 F R F' R' U' F' U F R2 U R' U' R

Cng thc: (R U' R' U) R2 y (R U R' U') F' d (R'2 F R F') TH2 (ch T): R U R' U' R' F R2 U' R' U' R U R' F'

Cng thc: (R U R' U') (R' F) (R2 U') (R' U' R U) (R' F') TH3 (ch V): R' B' R' B R B2 D B D' B U R U' R

Cng thc: R U R U y R F R2 U R U R F R F TH4 (ch Y): F R' F' R U R U' R' F R U' R' U R U R' F'

Cng thc: (F R U') (R' U' R U) (R' F') (R U R' U') (R' F R F')

1.Gii thiu:y l bi hng dn cc k n gin, da theo hng dn ca Leyan Lo, mnh m bo khi hc theo hng dn ny th ch cn bit c l c th gii c khi rubik 3x3. Trong trng hp c xong vn khng lm c th mnh khuyn nn tm nhng tr khc d d m chi kiu nh nhy dy, bn bi hay trn tm g y. Trc khi bt u hc, ta cn quy c mt s th cho d lm vic: - Vin gia: l vin ch c 1 mu, nm chnh gia cc mt. - Vin cnh: l vin c 2 mu. - Vin gc: l vin c 3 mu.

Trong hng dn ny, nhng phn khng quan trng ca khi rubik, tc l nhng vin khng cn quan tm n s c t mu xm, cn nhng phn quan trng s c nh du X. - Cc k hiu: Mi mt ca khi rubik s c k hiu bi 1 ch ci tng ng: Phi: R Tri: L Trn: U Di: D Trc: F Sau: B

R L U D F B : xoay cc mt tng ng 90 theo chiu kim ng h. R L U D F B: xoay cc mt tng ng 90 ngc chiu kim ng h. R2 L2 U2 D2 F2 B2: xoay cc mt tng ng 180 . - Lu : khi gp cng thc B tc l xoay mt B 90 theo chiu kim ng h th ta phi mt B hng v pha mnh ri mi xoay 90 theo chiu kim ng h. Cc mt khc cng tng t. -Phng php gii: y l phng php lm tng tng, khi gii cc tng sau phi m bo khng lm xo trn cc tng trc. Tng 1 l d lm nht, c th gii bng trc gic, t ngh ra cch gii. Tng 3 d nhin l kh nht, phi hc nhiu cng thc v ch mt sai lm tng ny cng khin ta phi lm li kh nhiu.

2. Tng 1:Xem video hng dn ca vuaquyen92 y:http://www.rubikvn.org/forum/showthread.php?tid=3393Ta quy c tng 1 l tng c mt trng, tng 3 l tng c mt vng. Lc u, ta s mt trng l mt U. gii tng 1 ta cn lm 2 bc: gii cc vin cnh to thnh hnh ch thp v sau gii cc vin gc. Ch rng cc vin gc v cnh cn phi c a v ng v tr ca n.

To hnh ch thp:

Bc ny cc k n gin, cc bn hon ton c th t lm c, mnh gi cch lm sau: u tin, ta cn tm cc vin cnh c mu trng, vin ny c th nm tng 1, tng 2 hoc tng 3. Nu vin cnh nm tng 2:

B1: Sau khi chn c 1 vin cnh, ta phi xc nh n thuc v v tr no trn khi rubik. lm c vic ny, ta xem mu k vi mu trng l mu g. trng hp 1 mu l mu , do vy vin cnh phi nm ch ch X bn phi, ngay pha trn vin gia mu . trng hp 2, mu l mu xanh l cy, do vin cnh phi nm ch ch X pha trc. Ta gi v tr m vin cnh cn a ti l goal. B2: Sau khi xc nh c goal, vic tip theo l tm cch a mt mu trng ca vin cnh ln mt U. Trong trng hp 1, ta xoay F, vin cnh s c a ti v tr ch X pha trc. Trng hp 2, ta xoay R, vin cnh s c a ti v tr ch X bn phi. Ta gi v tr m vin cnh s ti sau khi lm bc 2 l target. B3: C 1 vn xy ra l nu lm lun bc 2 th mt trng ca vin cnh ng l c a n mt U nhng vin cnh li khng nm goal. Khng sao, chuyn nh nh con th ang n c b thng da n bn b, trc khi lm bc 2 ta a goal ti v tr target bng cch xoay U hoc

U hoc U2. Sau lm bc 2 ri li a goal tr v chn c bng cch lm ngc li ci U, U, U2 trn. V d trng hp 1, cch lm s l (U F U). Trng hp 2 cch lm s l (U R U). Nu vin cnh nm tng 1 hoc tng 3:

Ta xoay F hoc F a vin cnh v tng 2 ri dng phng php trn gii.

Gii vin gc:T bc ny tr i, ta s lt ngc khi rubik li, tc l mt trng thnh mt D cn mt vng thnh mt U. Vic ny s gip chng ta d dng xc nh v tr cc vin cn tm.

u tin, ta cng phi tm cc vin gc c mu trng, vin ny c th nm tng 1 hoc tng 3. Nu vin gc nm tng 3: B1: Xc nh v tr m vin gc cn c a ti bng cch xem xt 2 mu cn li ca vin gc. Ta gi v tr l goal. B2: a vin gc ti v tr ngay pha trn goal. B3: Ty vo tng trng hp, ta dng 1 trong cc cng thc sau gii.

1. Dng cng thc (R U R U2) a mt trng sang pha bn cnh. 2. Dng 1 trong 2 cng thc trn gii. Nu vin gc nm tng 1:

B1: Dng cng thc (R U R U) a vin gc v tng 3. B2: Dng phng php trn gii.

3. Tng 2:Xem video hng dn ca vuaquyen92 y:http://www.rubikvn.org/forum/showthread.php?tid=3393 tng ny, cng vic rt nh nhng, ta ch cn gii 4 vin cnh. u tin ta xc nh cc vin cnh ca tng 2, l cc vin cnh cn li m khng c mu vng. Cc vin ny c th nm tng 2 hoc tng 3. Nu vin cnh nm tng 3: B1: Xc nh v tr vin cnh cn a ti bng cch xem xt 2 mu ca vin cnh. Ta gi v tr l goal. B2: Xoay U, U hoc U2 a vin cnh n v tr gn goal sao cho trc gia ca mt F trng mu (xem hnh minh ha pha di). B3: Ty vo tng trng hp, dng 1 trong 2 cng thc sau gii:

Nu vin cnh nm tng 2:

B1: Dng cng thc (R U R) (U F U F) a vin cnh v tng 3. B2: Dng phng php pha trn gii.

4. Tng 3:Xem video hng dn ca vuaquyen92 y:http://www.rubikvn.org/forum/showthread.php?tid=3393 gii tng 3, ta lm 4 bc nh sau:

nh hng cnh:Mc ch ca bc ny l to ra hnh ch thp mu vng mt U. C 3 trng hp cn gii quyt, tuy nhin ta ch cn hc 1 cng thc duy nht. Khi lm cng thc di y, tng 3 s bin i theo th t nh sau:

Cng thc: (F R U) (R U F')

nh hng gc:Mc ch ca bc ny l a ton b mt U v ng mu (mu vng). C tt c 7 trng hp cn gii quyt. Khi lm cng thc di y, tng 3 s bin i nh hnh minh ha. Ch hnh minh ha bn di th hin gc nhn t trn xung, khi lm cng thc ta vn phi gi khi rubik sao cho mt vng nm trn cng.

Cng thc: (R U) (R U) (R U2) R Click vo cc trng hp sau bit cch xoay (my phi ci java): TH1 TH2 TH3 TH4 TH5 TH6 TH7

Hon v gc:Mc ch ca bc ny l a cc vin gc v ng v tr ca n. Cng thc di y s hon i v tr ca 2 vin gc nh hnh minh ha. a c 4 vin gc v ng v tr, ta c th phi lm cng thc ny 2 ln.

Cng thc: (R U R' F') (R U R' U') (R' F) (R2 U') (R' U')

Hon v cnh:y l bc cui cng, 2 cng thc di y s hon i v tr ca 3 vin cnh nh hnh minh ha. a 4 vin cnh v ng v tr, ta c th phi lm cc cng thc 2 ln. Lu ta c th ch cn nh 1 trong 2 cng thc l c th hon thnh bc ny, tuy nhin khi thi gian lm s lu hn.

Ai hc xong hng dn theo cch c bn th vo Update: h thng 2look-OLL nng cao hn v cch hc ca Devilbringer kh hiu qu mi ngi c th down hoc xem topic y [Video] y l link v hng hc sau c bn ca tikid rt c ch cho cc mem http://rubikvn.org/forum/showthread.php?tid=3665 Mnh thy mt s ngi gii c rubik 3x3 theo hng dn c bn trn, do mnh s post thm 1 s cng thc gip cc bn gii khi rubik mt cch nhanh hn. Xem quy c k hiu chung ti y: http://rubikvn.org/forum/showthread.php?tid=241 - Khi gii tng 2, nu vin cnh nm tng 2:

Thay v a v 2 trng hp c bn, ta c th dng lun cng thc sau gii: (R U' R') d (R' U2) (R U2) (R' U R) d :quay c 2 tng di theo chiu kim ng h. - Tng 3, nh hng cnh: Ta c 3 cng thc to ch thp cho 3 TH sau:

F (R U R' U') F'

F (U R U' R') F'

F (R U R' U') F' f (R U R' U') f' - Tng 3, nh hng gc: Ta c 7 cng thc ng vi 7 trng hp:

(R'2 D) (R' U2) (R D') (R' U2 R')

(l' U') (L U) (R U') (r' F)

(R' F) (R B') (R' F') (R B)

(R U R' U) (R U2 R')

(R' U') (R U') (R' U2 R)

(R U2) (R'2 U') (R2 U') (R'2 U2 R)

F (R U R' U') (R U R' U') (R U R' U') F'

- Tng 3, hon v gc: Ta c 2 trng hp: Nu 2 gc ng nm thng hng, ta dng CT sau (PLL ch J):

Cng thc: (R U R' F') (R U R' U') (R' F) (R2 U') (R' U') Nu 2 gc ng nm cho nhau, ta dng CT sau (PLL ch Y):

Cng thc: (F R U') (R' U' R U) (R' F') (R U R' U') (R' F R F') - Tng 3, hon v cnh: 2 cng thc sau rt c ch:

(U R' U') ( R U' R U) ( R U' R' U) ( R U R2 U') ( R' U)

(M'2 U) (M'2 U2) (M'2 U) M'2 Sau khi hc ht nhng cng thc trn, cc bn vo link sau tm hiu v cch gii Fridrich: http://rubikvn.org/forum/showthread.php?tid=201 Sau hc F2L, PLL v OLL ci thin thnh tch.Ci ny chc mi ngi luyn 1 kiu nn ty tng ngi c kinh nghim ring. Vy nn mnh lp topic ny mi ngi vo trao i kinh nghim :neutral: . Hin gi th mnh cng finger trick c 1 cht vy cng chia s :razz: Tay phi: finger trick U,R,R',B,F,D' Tay tri: finger trick U',L,L',F',D,B' Hin ti mnh finger trick kh thun thc c moves RUR', RU'R', R'FR, FR'F' :lol: Cch luyn ca mnh t hi l beginner: _Tay

phi ( y l tay thun ca a s mi ngi d tp nht)

+ Finger trick U : ci ny l n gin nht ch vic dng ngn tr tp gy c vi ba ngy l quen ( nu xi cube lm cha xt sillicone nn dng thm ngn ci bn tay tri ko cube rt d pop) +Finger trick R, R': phn ny chc cng ko kh lm mnh ch vic dng c bn tay mnh cm vo

m xoay thi n gin chc ai cng lm c ch ty mc nhanh hay chm thi ( ci ny mnh xoay = c bn tay ko bit c ai gy R,R' 1 ngn c ko ?)

+Finger trick RUR': moves ny l kt hp cc finger trick li ni lin mch gip ko b ngt qung, sau khi luyn kh thnh thc U v R hay R' ta c th luyn = cch tp cm sao cho thun li nht sau khi mnh xoay R xong th c th U lun v R'. Cch cm l mnh ch cn t ngn tr ln trn cc gc mt (URF) v ngn ci di gc mt (DRF) sau ta xoay R khi y ngn tr s nm v tr thun li ta s dng U cn ngn ci cng c v tr tng t ta xi R' finger trick ny rt thun li khi ta F2l ngoi ra cng c th p dng cho 1 s cng thc OLL v PLL

+Finger trick F, B: sau khi ta thnh thc my phn trn ri th c th t rt ra cch xoay F B vi mnh th mnh ton xoay B bng cch p dng x' ri xi finger trick U cn F th cng tay tng t khi xi moves RUR' nhng mnh s dng ngn tr y gc mt (URF) xung th l finger trick xong F +Finger trick D': kh kh thng th mnh gy = ngn eo nhn hin ti cng cha tht s thun thc cch cm ca mnh l dng 2 ngn ci cm phn layer 2 sau gy = ngn eo nhn _

Tay tri ( ci on ny tng i kh i vi nhiu ngi tr nhng ai thun tay tri :?: )+Finger trick U': khng khc g so vi U cng xi ngn tr tay tri m gy thi cng s mt nhiu thi gian nu mun quen :?: +Finger trick L, L':tng t R R' +Finger trick L'U'L:moves ny mnh tuy lm c nhng cha thnh phn x ti t tp :mad: cng tng t RUR' nhng cm ngc li thi +finger trick F', B', D': cng ging nh F, B, D' nhng ngc li KL: nu kh thnh thc finger trick s cc k c li khi hc OLL hay PLL bi my TH trong hu nh ch cn nh cc combine moves l hc s rt nhanh ko phi kh s ngi hc thuc lng :mad: l tt c nhng g mnh bit ngoi ra nu ai mun luyn finger trick nhanh hn th nn tp scramble da trn CT nh ca Jnet hoc chng trnh no a ra. D lc u c v chm nhng dn dn tc s nhanh hn v s finger trick c :!:

Ch : Mi khi finger trick nn tp cm sao cho cc ngn ko lm vng ng xoay ca cubeMi ngi vo chia s nh tin th c g cn hc tp :neutral: