Mihailo's chess problems (new) 

A Super corrective Ideal Ruchlis – a synthesis of the Velimirovic black corrective Ideal Ruchlis and the Secondary Dombrovskis black corrective Ideal Ruchlis. Basically, this synthesis assumes a specific Ideal Ruchlis which is realized after a random and two black corrective defenses. To the best of my knowledge this is the very first presentation of this concept in a standard orthodox twomover set-to-actual play setup. Overall, 6+5 changed mates with an additional Ruchlis type mate transfer and a sacrificial check-allowing key.

A Zagoruiko 3×2 with a reciprocal change of mates after a pair of black corrections combined with a secondary Barnes/Sushkov line-interference dual-avoidance and a couple of additional tries with an extra changed mate and a logical connection to the set play.

Secondary Barnes/Sushkov with reciprocal line leaving/closing and self-interference (in try 2, Rh3 abandons h3-d3 line and 1...n∼(a) is not followed by 2.Rc4(A) due to a self-interference on a6-d3 line; on the other hand, in the solution Ba6 abandons a6-d3 line and 1...n∼(a) is not followed by 2.Be3(B) due to a self-interference on h3-d3 line).

A multi-phase change of play with a triplet of phases with a doubling the secondary threat white strategy and black corrective separations. 6+5 changed mates and an Ideal Ruchlis plus a Zagoruiko 3×2 on two of the Ideal Ruchlis black defenses which effectively establishes a Zagoruiko 6+2+5. An additional Zagoruiko 3×2, Reciprocal Secondary Dombrovskis with changed mates, and three thematic tries (4, 5, and 6) refuted by the three (out of the four in total) Ideal Ruchlis thematic black defenses (1...qxd4((c), 1...pe3(d), and 1...qxf5(a)). The three main phases contain the black queen's focal positions worked out carefully so that the refutations of theses phases are  unique but different black queen's moves (1...qxf7(h), 1...qe5(e), 1...qe6(g)).

A Dombro-Ideal Ruchlis combination with black queen corrections and zugzwang. There are 6 pure changed mates between the set play and the solution after black thematic defenses (b)-(g), plus another change with repeated mates after black queen random move (a). Two Ideal Ruchlis concepts, one after thematic defenses (c)-(f) and another after thematic defenses (a,d,e,f). The second Ideal Ruchlis is after a pair of the black queen's corrective moves. Two thematic tries together with the solution complete a full Dombrovskis involving transferred thematic mates (A,B). The refutation of the first try completes another Domborvskis effect with the set play. In both, the set play and the solution black queen plays three corrective moves followed by different mates. Also, 4 changed mates with two of them being repeated and one transferred after black queen's random and corrective moves (a)-(d). The black queen zugzwang in the solution after two thematic tries with threats and an additional try, 1.Bxb5 ( 2.Bd3) pxb4 2.Qxb4, but 1...pc4!

A triple Dombrovskis (2× primary + 1× secondary) against the same threat, together with a changed mates type of Ideal Shedey theme after a pair of black corrections, Zagoruiko 1+2+3+3 in a threat form (1+1+2+2 after a pair of black corrective defenses plus 3 different threats), and an additional double anti-reversal/dual-avoiding play. Flight-giving key as well.

A triple Dombrovskis (2× primary + 1× secondary) against the same threat, combined with a complete Ideal Shedey theme with changed mates and black corrections, Zagoruiko 2+3+3 in a threat form, and a supplemental white corrections/black promotions duel within a logical refutations reductions attacking concept ((c/d/e) → (d/e) → (e) → (no (c/d/e) but f)).

A Dombro-Ideal Ruchlis combination with a multi-phase change of play. Compressed Ideal Ruchlis with a black correction between tries 1 and 2. Tries 1, 2, and the solution also show a complete Dombrovskis in a primary+secondary defenses form with changed mates. Three Zagoruikos after three thematic black moves, 1...ne3(a), 1...rxf8(c), and 1...ne1(d), which also refute tries 4, 3, and 2, respectively.

A complete Dombrovskis (secondary + tertiary form) realized in only two phases and combined with 2× Ruchlis, tertiary level of black corrective defenses in the set play and 4 secondary corrective defenses in the solution. Flight-giving key as well.

A multi-phase change of play with a third level zugzwang gradual refutations reductions with changed mates on the refutations being reduced resulting in a Zagoruiko 1+2+3. Also, another Zagoruiko 4×2 on the black pawn pe6 moves, a triple Zagoruiko 3×1 after each of the reduced refutations, and a triple Dombrovskis in a primary+secondary form.

The gradual refutations reductions concept that also produces a Zagoruiko 1+2+3 works (roughly speaking) in the following way: the set play is refuted by a quartet of black thematic moves, 1...pxd5(b)/nf4(c)/pf6(d)/pf2(e); each of the tries 1-3 successively provides a new mate on one of the remaining refutations and changes the mates already provided; as the number of mates increases by one in each new phase and since all the mates are different, this succession of newly introduced white phases/mates establishes precisely the Zagoruiko 1+2+3 after 1...pxd5(b)/nf4(c)/pf6(d) in tries 1-3.

A Shedey-Lacny combined with black corrections, primary and secondary Domborvskis effects, and a threefold threat-mate transference in a no white pawns setting.

Black corrections Domborvskis effects combined with Shedey-Lacny, and a double threefold threat-mate transference.

The set play, try 1, and the solution – 2× threefold threat-mate transference in a set-play black corrections form ((B) is the threat in try 1 and follows (d) and (a) defenses in the set play and the solution, respectively; (A) is the threat in the solution and follows (e) and (b) defenses in the set play and try 1, respectively).

A Shedey-Lacny + two additional changes and an overall multi-phase change of play with a host of various types of Domborvskis and black corrections effects.

Try 2 and the solution – 5 chnaged mates in a threat form (4 pure changes + 2 different threats).

A Shedey-Lacny and a complete cycle of white threatening and mating moves (∼C/AB,∼B/CA,∼A/BC) combined with gradual refutations reduction with changed mates on the refutations being reduced, cyclic pseudo Le Grand, and various corrective and Dombrovskis effects.

The refutations being reduced and their corresponding mates are: (aB) (thematic try 4); (aC,bA) (thematic try 2); (aB,bC,cD) (the solution); out of 6 gradually introduced mates (B – try 4, CA – try 2, BCD – the solution) 5 are changed or transferred.

A Shedey-Lacny combined with cyclic (3×2) change of white threatening and mating moves, Zagoruiko, pseudo Le Grand, black corrections, and Dombrovskis effects.

A multi-phase change of play with Shedey-Lacny plus Zagoruiko 3×2 split over four phases combined with black corrections and Dombrovskis effects.

The set play, tries 1 and 4 — Dombrovsksis trifecta, 1...pf6(a) is a secondary Dombrovsksis defense/refutaion in the set play, the Dombrovsksis refutation in try 1, and a primary Dombrovsksis defense in try 4.

Another threefold Shedey-Lacny plus a 3×3 cyclic change of white threatening and mating moves combined with black corrections, double cyclic pseudo Le Grand, and Dombrovskis effects.

Due to the appearance of thematic defenses (i) and (j) in thematic try 2, the cycle also exists on two different black defenses in each of these phases; consequently one has a double cyclic pseudo Le Grand (∼BaC,∼CcA,∼AiC and ∼BbA,∼AjC,∼CdB) or a complete 3×3 pseudo Shedey-Lacny.

A threefold Shedey-Lacny plus a triple Dombrovskis combined with additional mate changes and black corrections.

Try 1 and the solution — 4 changed mates in a threat form (3 pure changes plus two different threats); additional change after 1...qh2(c).

A threefold Shedey-Lacny combined with a multi-phase change of play that includes a double Zagoruiko and a plenty of Dombrovskis effects.

Thematic tries 1 and 3 and the solution — Zagoruiko 1+2+2 after 1...pxc3(a) and 1...pxd3(b). 

The set play, thematic try 2, and the solution — Zagoruiko 1+2+2 after 1...rc1(c) and 1...nd2(d).

A threefold Shedey-Lacny combined with black corrections, and a transformation from secondary to primary Dombrovskis effects in a light position with no white pawns (and only one black pawn).

A threefold Shedey-Lacny, a complete 3×3 cycle of white threatening and mating moves, 3× threefold cyclic pseudo Le Grand, Dombrovskis, Hannelius, Dombro-Hannelius, Zagoruiko, flight-giving try and key, and a plenty of changed mates (3× Ruchlis).  

The 3×3 cycle of white threatening and mating moves is also a complete 3×3 pseudo Shedey-Lacny with 6 different black defenses (d), (c), (a), (b), (j), (i) (∼CdAcB,∼BaCbA,∼AjBiC).

3× Ruchlis type mate transfer (each of the three white thematic mates 2.Pf4(A), 2.Ng6(B), and 2.Qe6(C)), is Ruchlis transferred)

– tries 3 and 4 — (dA;dD,bA)

– try 2 and the solution — (iB;iC,jB)

– try 4 and the solution — (aC;aB,bC).

A threefold Shedey-Lacny combined with a threat form Zagoruiko 4+4+2, a quadruple variant of Theme A, three pairs of threat-separating defenses, anti-Barnes theme, and a multi-phase change of play with secondary/primary transformations of Dombrovskis effects.

Threat-separating threat form of Zagoruiko 4+4+2 (3+3+2 after thematic defenses 1...rxg4(a), 1...bxe4(b), and 1...nxd2(c) plus two different threats (2.Nf6(B) and 2.Be6(A)) in tries 1 and 2).

Three pairs of threats separations; 1) the separation between Shedey-Lacny thematic defenses 1...rxg4(a) and 1...bxe4(b); 2) the separation between additional thematic defenses by nf3, 1...nxd2(c) and 1...ng5(d); and 3) the separation between the refutations of thematic tries 1 and 2, 1...bf5(e) and 1...nd4(f) on the one side and the refutation of the additional try 1.Kxb7?, 1...rc1(g), on the other side.