Fairy twomovers with multiple threats 2

1...Rxc2(Ra8) a 2.Qf4# A (Qf5?)
1...Rxd4(Rh8) b 2.Qf5# B (Qf4?)

1.Se4! th. 2.Rc1#, Rd1#, Re1#, Rg2#
1...Rxc2(Ra8) a 2.Qf5# B
1...Rxd4(Rh8) b 2.Qf4# A
1...Rf4 2.g8R#

In set play the thematical defences by black rook allow a pair of mates by unpinning the white queen, but there is dual avoidance. It works thanks to the kamikaze effect activating the B/Q line. The key by white knight opens bR line and closes two masked lines - a kind of bi-valve. There are four threats, all by wR opening a battery with the key wS as a rear piece. Capturing defences by black rook open again B/Q lines, this time aimed at wS, but at the same time mean blocking of rebirth squares of bR, allowing the same mates by wQ, reciprocaly changed.

1...Bf3 a 2.Qxf3(Qd1)# C
1...Re2 b 2.Qxe2(Qd1)# B

1.Bd1! A th. 2.Qe2#, Qf3#
1...Bf3 a 2.Qe2# B
1...Re2 b 2.Qf3# C
1...cxd3(d7) 2.Qd3#

1.Qe2! B th. 2.Qd1#, Qxe6#
1...Bf3 a 2.Qxf3(Qd1)# C
1...Rxe2(Ra8) b 2.Bd1# A
1...cxd3(d7) 2.Qc4#

1.Qf3! C th. 2.Qd1#, Qxc6#
1...Bxf3(Bc8) a 2.Bd1# A
1...Re2 b 2.Qxe2(Qd1)# B
1...cxd3(d7) 2.Qb3#

The most important phase with multiple threat from the complete Kiss cycle viewpoint is 1.Bd1 as threat mates 2.Qe2# and 2.Qf3# are separated after thematic defences 1...Bf3 and 1...Re2. Other two solutiosn have double threats too, 2.Qd1# is paired with captures of pieces on the 6th rank. The third variation 1...cxd3(d7) has changed mates over three phases. Impressive and original combination of fairy conditions!

Erlking = fers+wazir

1.FWf~? th. 2.LIe1#, RLb1#, FWa5#
1...BLd5!

1.FWxe5(FWe8)? th. 2.RLb1# B
1...FWf~ a 2.FWa5# A
1...FWfe5! 2.LIe1#
1...FW4~ b 2.LIe1# C
1...FWee5! 2.FWa5#
1...FWe3!

1.FWxf5(FWf8)? th. 2.LIe1# C
1...FW4~ b 2.RLb1# B
1...FW4f5! 2.FWa5#
1...FWe5~ c 2.FWa5# A
1...FW5f5! 2.RLb1#
1...FW5d5! 2.LId4#
1...FWd3!

1.FWxe4(FWe8)! th. 2.FWa5# A
1...FWf~ a 2.RLb1# B
1...FWfe4! 2.LIe1#
1...FWe5~ c,RLxa6(RLa1) 2.LIe1# C
1...FWee4! 2.RLb1#

There is triple threat only in the first try with random move of FWf4. It is important that FW leaves the square where it could be captured by Sh5, thus threatening three different mates by fairy pieces to bK on the b-file. 1...BLd5 defends by opening Rh8 to b8.

Then three correcting moves by FWf4 remove this defence by anticipatory closing of still masked h8-b8 line, but at the same time they remove black FWs from black lion lines aimed at b1, e1 and a5. This brings into life known mechanism of carousel change with missing mate in the threat function (after random defences), enriched by reciprocal black corrections.

1.Qxd4(Qd1)? th. 2.NExe7(Ee8)# A, Bxe3(Bc1)# C
1...NEd4 a 2.Qxd3(Qd1)# B
1...Rb8!

1.ROxd4(ROd8)? th. 2.Bxe3(Bc1)# C, Qxd3(Qd1)# B
1...NEd4 a 2.NExe7(NEe8)# A
1...Sc1!

1.Bxd4(Bc1)! th. 2.Qxd3(Qd1)# B, NExe7(NEe8)# A
1...NEd4 a 2.Bxe3(Bc1)# C

Any white capture on d4 means opening of three lines: Qd7-d3 (for ectobattery mate by queen), ROa1-b3-d4-f3 (for mate by NEg5 desactivating NEh7 with respect to f3) and Bc4-e3 (for ectobattery mate by bishop).

Then of course, the specific capture by Q, RO, B removes one of possibilities, leading to cycle of double threats. Moreover, white pieces are reborn on squares with lines aimed at d3, f3 and e3 respectively via still occupied d2. Thematic defence NEd2-d4 closes two lines and opens one, leading to reapparance of the missing mate in the Ukrainian cycle style.

1.VAf5? th. 2.LExb1(LEb8)#, LExh1(LEh8)#
1...Sxh6(Sb8)!

1.PAxf3(PAf8)? th. 2.PAa8#, PAxf1(PAf8)#
1...Sxf6(Sb8)!

1.PAf8? th. 2.PAa8#
1...Sxh6(Sb8) 2.LExh1(LEh8)#
1...Sxf6(Sb8) 2.PAxf1(PAf8)#
1...Sxe7(Sb8)!

1.LEh4? th. 2.LExh1(LEh8)#
1...Rxf6(Rh8) 2.PAxf1(PAf8)#
1...Rxe1(Rh8) 2.LExb1(LEb8)#
1...Rxe7(Rh8)!

1.LE1g2? th. 2.VAxf1(VAf8)#
1...f2 2.LEc6#
1...Bxa5(Bf8) 2.LEa2#
1...Bxh6(Bf8) 2.LExh1(LEh8)#
1...Bxe1(Bf8)!

1.LE3g2! th. 2.VAxf1(VAf8)#
1...f2 2.LEc6#
1...Bxa5(Bf8) 2.LEa2#
1...Bxe1(Bf8) 2.LExb1(LEb8)#
1...Bxh6(Bf8) 2.LExh1(LEh8)#
1...fxg2(g7) 2.PAxf1(PAf8)#

The play is centered around the trio of white pieces Ra7, Bb7 and Sc7 already aimed at bK. They do not check due to the presence of Rh1, Bf1 and Sb1 on their rebirth squres. Thus white wants to capture those blockers, with some collateral effects hidden in specific attacks.

The try 1.VAf5? has two threats by LEh7 aimed at b1 and h1, while 1.PAxf3(PAf8)? has one "standard" threat by capture on f1 and one "collateral" by direct check from a8.

The rest is less interesting from the point of view of multiple threats.

1.Rf1~? th. 2.Sxd2(Sg1), Sxd6(Sg1)#
1...f3 2.Sf4#
1...Sxg6(Sg8)!

1.Rb1? th. 2.Sxd2(Sg1), Sxd6(Sg1)#
1...Sxg6(Sg8) 2.Rb5#
1...f3!

1.Rxf4(Ra1)! th. 2.Sf4#
1...Rxe4(Ra8) 2.Bf3#
1...Rf4 2.Sxd6(Sg1)#
1...Bf4 2.Sxd2(Sg1)#

Random move of Rf1 activates Be2 to c4, thus allowing double threat by Sc4 firing ectobatteries that need not block c4 for bK anymore. 1...f3 is met by simple mate by Sg2, but Black has strong defence 1...Sxg6(Sg8)! opening simultaneously in ectobattery style lines of Bh7 and Rh6.

Specific correction 1.Rb1 prepares specific mate for 1...Sxg6(Sg8) as capturing black knight blocks rebirth square for Sa7, but white rook blocks rebirth square of white knight too, therefore the refutation works.

Thus there is completely new key by Rf1 as well, opening two black lines of Rh4 and Bg3 and thus neutralising two White potential threats by Sc4. The new threat is in fact the well known mate 2.Sf4# and Black defends by moves to the threat square with Grimshaw allowing reappearance of try threats.

Very Anticirce-specific mechanism!

1.Nd3? th. 2.Nd5#, Ne3#, Nb3#, Nd2#
1...Rg~ 2.Nxg3(Ng8)#
1...Sc~ 2.Nxc7(Nc8)#
1...Re8!

1.Nf~? th. 2.Nd3#
1...Rd8!

1.Nd2? th. 2.Nd3#
1...cxd2(d7)!

1.Nd5! th. 2.Nd3#
1...Rg~ 2.Nxg5(Ng8)#
1...Sc~ 2.Nxc5(Nc8)#
1...Re8 2.Qf1#

White half-battery on the first rank is less fierce than it might seem at the first look. Sa3 and Ba2 do not attack Rb1 because of the presence of blockers Rg8 and Sc8 on their rebirth squares, but also white nightriders cannot move around very freely.

In fact Ne1 has in diagram position only one move without too much harm to white (1.Nf3 closes wQ line to f2) and it carries quadruple threat by Nf1. Moves Rg8 and Sc8 defend all mates by activating black pieces on a-file, but also allow captures by Sf1 with rebirth clashes.

Any move by Nf1 then has single threat (already known 2.Nd3#) and two white corrections prevent black refutation 1...Rd8, but the try 1.Nd2 allows opening of h8-a1 line.

Finally, in the solution there is change of two mates again with rebirth clashes.