93-Chess Problem Solution.

Solution: 1. Rh1-h6! threat
1. ... Ra7-d7 2. Rh6-e6
2. ... Rd7-e7 3. Re6-d6#

This is a Roman theme. In a Roman decoy, the decoyed piece can still defend against the initial try but such defense develops a weakening of the Black position.

92-Chess Problem Solution.

Solution: 1. Rh1-h4! threat 2. Rh4-d4#
1. ... Bd8-f6/xh4 2. Sa8-c7#
1. ... Bd8xb6 2. Sa8xb6#

A very economic decoy maneuver. The threatening White Rook decoys the Black Bishop
And White Knight can mate in b6. We have also here a Mirror Mate setting, with all the squares surrounding the Black King are unoccupied.

91-Selfmate Problem Solution.

Solution: 1. Sd2-f3! waiting
1. ... Sh8-f7 2. Sf3-e5 ... Sf7xe5#
1. ... Sh8-g6 2. Sf3-e5 ... Sg6xe5#

Again, a selfmate, this time in two moves. Enjoy.

90-Selfmate Problem Solution.

Solution: 1. Bg1-f2! waiting
1. ... b6-b5 2. Bf2-e1+
2. ... b5-b4+ 3. Be1xb4 ... c5xb4#

In the self-mate problems, Black is forced to mate White.

89-Problem Solution

Set Play:
1. ... Bh8 ad lib 2. Bh2xe5#

Solution: 1. Sa4-c3! threat 2. Sc3-b5, Sc3-e2#
1. ... Rb8-e8 2. Sc3-b5#
1. ... Bh8-e5+ 2. Bh2xe5#
1. ... b6 ad lib 2. Sc3-e2#

We have here a Cross-check, in which White answers Black check with a new check.

88-Problem Solution.

Set Play:
1. ... Sd8 ad lib 2. Sa5(x)c6#
1. ... Bf5 ad lib [a] 2. Sa1(x)c2 [A] #

Solution: 1. Kb3-b2! threat 2. Sa1-b3#
1. ... Bf5-c2/e6 [b] 2. Sa1(x)c2 [A] #

Here we find a Mate transference: A white mate is thus ‘transferred’ from one black defense to another. See the new threats created by the white King key move.

87-Problem Solution.

Set Play:
1. ... Rd8 ad lib, Bc6-d5 2. Se1(x)d3#
1. ... Rd8-d5, Bc6 ad lib 2. Se1(x)g2#
1. ... Bc6-d7 2. Se1-d3/g2#

Solution: 1. Ra1-a5! threat 2. Bf6-g5#
1. ... Rd8-g8, Bc6-d5 2. Se1-d3#
1. ... Rd8-d5, Bc6-b5 2. Se1-g2#

This is the Grimshaw theme, in which the interference of the black pieces in the same square, (usually a Bishop and a Rook, doesn't require a white sacrifice.

86-Problem Solution

Set Play:
1. ... Ba8-d5, Rd8 ad lib 2. Se1(x)d3#
1. ... Ba8 ad lib, Rd8-d5 2. Se1(x)g2#

Solution: 1. Bh1-d5! threat 2. Se1-d3, Se1-g2#
1. ... Ba8xd5, Rd8-g8 2. Se1-d3#
1. ... Rd8xd5 2. Se1-g2#

Here we have another Novotny. In this theme, the Bishop is sacrificed.
The presentation with less than 12 men and more than 7, is called Meredith

85-Problem Solution.

Solution: 1. Ree5! [2. Se3, Sb2#]
1. ... Rb8, Bxe5 2. Se3#
1. ... Rxe5 2. Sb2#

Here we have a Novotny Interference. The White Sacrifice in e5 creates alternative interferences to Black Bishop and Black Rook.