Analogy

Similarity between motifs (arrival and departure effects) from one phase to another.

In Helpmate Analyzer, if no more than one motive differs, then the analogy is considered good. The analogy is complete (perfect) if the motives of all moves are the same in both phases.

See also: Orthogonal-diagonal transformation.

Alias: Perfect analogy.

Feather, Christopher John

Schach-Aktiv, 1991

Example: Analogy
h#2 2.1... (5+8)

1.Kd4 Bb8 2.Rc2 Rxd3#
1.Kc4 Rb8 2.Bg1 Bxd3#

Complete analogy.

View in Helpmate Analyzer

FEN: 2R5/B1r5/1b6/2kn4/b3n3/1R1p4/8/3K1B1r

External links:

Caillaud, Michel

Olympic Tourney, 1984

1st Prize

Example: Analogy
h#2 2.1... (6+9)

1.Qxe8 fxe8=B 2.Sd5 Sd4#
1.Rxg8+ fxg8=S 2.Sf5 Sf4#

Good analogy.

View in Helpmate Analyzer

FEN: 4BbNK/4nP1p/4k2r/2P1n3/q3p1r1/8/4N3/8

External links:

Feather, Christopher John

Schach-Echo, 1976

Example: Analogy
h#2 2.1... (5+9)

1.Qxb6 Rc1 2.Kd4 Qxd2#
1.Qxc6 Bg1 2.Kc4 Qb3#

Complete analogy.

View in Helpmate Analyzer

FEN: 5b2/8/1BR5/2qkp3/n3r3/8/P2p3p/K2Q3r

External links:

Blaustein, Yeshayahu

Israel Ring Tourney, 1967

2nd HM

Example: Analogy
h#2 2.1... (6+6)

1.Qa6 Qf6 2.Bb5 c4#
1.Qa3 Qg5 2.Rb3 c3#

View in Helpmate Analyzer

FEN: 3QK3/3P4/8/8/4k3/3qrp2/1pP1b3/1B2R3

External links:

Feather, Christopher John

Moultings 7 , 1991

Example: Analogy
h#2 2.1... (4+11)

1.Sfg5 Qxe4+ 2.R7d5 Qe8#
1.Seg5 Qxf3+ 2.Qd5 Qc3#

View in Helpmate Analyzer

FEN: 8/1pbr4/1pk5/1p3Q1K/1Bq1n3/5n2/8/1b1r3B

External links:

Moen, Kabe

The Problemist Supplement, 2019

Example: Analogy
h#3 b) -wPf3  (4+6)

a) 1.Re5 Bh7 2.Sc5 Bd3 3.Sde6 Be4#
b) 1.Bd6 Rf1 2.Sc6 Rf7 3.Sed4 Rf5#

Complete analogy.

View in Helpmate Analyzer

FEN: 6B1/8/4n3/3k4/2pnrb2/5P2/8/K2R4

External links:

Kirtley, Mark

The Problemist, 1988

1st HM

Example: Analogy
h#2 2.1... (6+7)

1.Bh7 Bd8 2.Rg6 Re2#
1.Rh6 Rf2 2.Bg6 Bc7#

Good analogy.

View in Helpmate Analyzer

FEN: 2B1r3/6n1/4r3/B1Ppk3/4b2R/7K/2R3p1/8

External links:

Feather, Christopher John

Moultings 2, 1991

Example: Analogy
h#2 2.1... (7+8)

1.Kf5 Sd5 2.Rxh6 Sxh6#
1.Ke7 Sd6 2.Bxg8 Sxg8#

Complete analogy.

View in Helpmate Analyzer

FEN: 3r1nB1/3p1N2/r3kN1R/7P/4qP2/4n3/b7/4K3

External links:

Pachl, Franz

Schach, 1982

Example: Analogy
h#2 2.1... (9+8)

1.Bxf4+ Kg6 2.Bd6 Re3#
1.Rxe6+ Kg5 2.Re3 Bd6#

View in Helpmate Analyzer

FEN: 6B1/p5PP/r3R2K/p6P/P4B1R/k7/1pp5/1qb5

External links:

Visserman, Eeltje

Sahs/Shakhmaty (Riga), 1965

2nd Prize

Example: Analogy
h#2 2.1... (7+8)

1.Bxb2+ Kf7 2.Bf6 Sd5#
1.Rxf4+ Kg7 2.Rf6 Sd1#

View in Helpmate Analyzer

FEN: 4r3/2p4p/5K1p/8/P4N1R/4k3/RN2Prp1/b7

External links:

Rotenberg, Jacques

Caillaud, Michel

Phénix, 1995

1st Prize

Example: Analogy
h#2 2.1... (8+6)

1.Rd4 Bxd4 2.Kxd4 Qe4#
1.Bd5 Sxd5 2.Kxd5 Qe6#

View in Helpmate Analyzer

FEN: 8/4K3/2P1b1Q1/4B3/1Pk1rp2/2Np1p2/3P1P2/8

External links:

Feather, Christopher John

Moultings 5, 1991

Example: Analogy
h#2 2.1... (7+11)

1.Qxg8 Rf3 2.Ke6 Re2#
1.Qxf8 Bc4 2.Kf6 Bc3#

View in Helpmate Analyzer

FEN: 5RBn/K2pNqp1/p2P2pn/4k3/rB6/8/p5R1/7b

External links:

,

Example: Analogy
h#2 2.1... (9+8)

1.Bxe5 Sb4 2.Ke3 Bb6#
1.Sxd5 Sf7 2.Kf3 Qf5#

View in Helpmate Analyzer

FEN: 5r2/1BBQR3/8/K2NN3/2Pb1nP1/2p5/4qkp1/1r6

Jones, Christopher James Austin

Springaren, 2012

1st Prize

Example: Analogy
h#3 2.1... (5+7)

1.Kd5 f4 2.Rb6 Rc6 3.Bd4 Bxg2#
1.Kd6 d4 2.Bb7 Bc6 3.Rc7 Rxf6#

View in Helpmate Analyzer

FEN: 2r5/K3n3/2k2r1R/8/6p1/8/3P1Pb1/b6B

External links:

Shorokhov, Boris

Orbit, 2011

Example: Analogy
h#2 2.1... (6+12)

1.Sa3 S4c3 2.Rxc3 Sxb4#
1.Ba5 S2c3 2.Sxc3 Sc5#

View in Helpmate Analyzer

FEN: 5r2/Kp6/1P6/3b4/Nbp1n3/1r1kP3/Npn1p3/q1B5