306. Sasa Stojanovic Yugoslavia
| 1.Sf4! ~ 2.Sd3#
1... Kf4:,Bf4:,gf4 2.Bh2,Qe7,Rh5#
1... Sf2,Sf6,de4 2.Re6,Rg5:,Qe4:#
Nice 3-fold sacrificial key and WS-corrective by-play. Promising construction by young author. [Milan Velimirovic]
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307. Aaron Hirschenson Israel
| 1.Be3? ~ 2.Ra4:#
1... Sd5,Rg6,Rc5! 2.a8Q,Qb6,? #
1.Bf6? ~ 2.Ra4:#
1... Sd5,Rg5!,Rc5 2.Qa6,?,Qb6#
1.Bd8! ~ 2.Ra4:#
1... Rc5,Rg5,(Sd5?) 2.a8Q,Qa6#
(1... Bc5 2.Sc6#)
Cyclic mating permutations type LLP7 according to the classification in Mat Plus 13-14/1997. This combination has already been shown with 8, and even 9 mates. [Milan Velimirovic]
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308. Miodrag Mladenovic USA
| 1.Bf7! (2.de4:#)
1.... Sbd5 (Ab) 2.Se6#
1.... Sc~ (Bc) 2.Sb5#
1.... Sc4 (Cd) 2.dc4:#
1.... ef3: (De) 2.Qe3:#
1.... Bf2 (Ea) 2.Qg7#
A/a = closing / opening of white line
B/b = unblock / self-block
C/c = guard / unguard
D/d = escape from / expose to WP
E/e = unpin / pin of black man
Problem equals the record number of variations and uses escape from /expose to the cepture by White Pawn as a new effect in 5-variation cycle. I wanted to achieve a 6-fold cycle, but it seems to be quite difficult. [Author]
This kind of quick response proves that my effort in writing the article Cyclic motives (Mat Plus 12/96) was not in vain. Excellent work! It seems that this thematic area still offers new possibilities and I am waiting eagerly for new achievements! [Milan Velimirovic]
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309. John M. Rice England
| 1.Rf6? ~ 2.Rd6#, 1... Rh6!
1.Rf5? ~ 2.e6#, 1... Rh5!
1.Rf4? ~ 2.Be4:#, 1... Rhe1!
1.Re3? ~ 2.Be4:#, 1... Rhh4!
1.Rd3? ~ 2.Bc3:#, 1... Rd1!
1.Rc3:? ~ 2.Rc5#, 1... Rc1!
1.Qc7? ~ 2.Qd6#, 1... Rh6! (1... Rd4: 2.Rd3#)
1.Qb6! ~ 2.Qc5#
1... Rd4:,Re5:,R~e,R~4,Bc6:+ 2.Qd4:,Rf5,Re3:,Rf4:,Qc6:#
Problem derives from the theme tourney organized in Pula by Nikolai Veliky: tries by a white unit are refuted by similar moves by a similar black unit. Here there are 4 such tries, with two more by the same WR for good measure - a 6-fold duel between the Rs. In the post-key play the same WR has to do battle with the other BR, but 1... Rd4: is too much for it to cope with. Fortunately WQ is on hand to give the mate, changed from the mate available after the try 1.Qc7? The problems main weakness is the inacti
vity of the WQ in the thematic try-play: the solver may not see 6 R-tries at all! The check on c6 prevents a cook by 1.Qb4? [Author]
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310. Victor Chepizhny Russia
| 1.Qd5? ~ 2.e5#, 1... Rb7!
1... e5,Qa7 2.Sb3,Se6:#
1.Rd5? ~ 2.e5#, 1... Qa7!
1... e5,Rb7 2.Sb5:,Se6:#
1.Se6:! ~ 2.e5#
1... Rb7,Qa7 2.Rd5,Qd5#
A freshness of this Banny mechanism comes from the small details. An interesting use of WP battery and the role of BPe6, which includes its bold capture in the solution! [Marjan Kovacevic]
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311. Srecko Radovic Yugoslavia
| 1.Bf6? Rd1!,Qe4:,Rd3 2.?,Bh5,Bg6#
1.Bg5? Rd1,Qe4:!,Rd3 2.Bh5,?,Bf7#
1.Bh4? Rd1,Qe4:,Rd3! 2.Bg6,Bf7,?#
1.Bf7? Rd1!,Qe4:,Rd3 2.?,Bh4,Bg5#
1.Bg6? Rd1,Qe4:!,Rd3 2.Bh4,?,Bf6#
1.Bh5? Rd1,Qe4:,Rd3! 2.Bg5,Bf6,?#
1.Rh7! ~ 2.Bd7:#
1... Rf7 2.Se3#
1... Qg7 2.Qc4#
1... Rh7: 2.Se1#
Two sets of cyclic mating permutations (type LLL6/LLL6) in 6 tries and complete different solution with transfer of 3 mates. [Milan Velimirovic]
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312. Efren Petite Spain
| 1.Rf3? ~ 2.Qd5:/ed5#
1... Ra5,Qd1,Rd2! 2.Bf7,Bg4,?#
1.Rg3? ~ 2.Qd5:#
1... Ra5,Qd1!,Rd2 2.Sg7:,?,Bg4#
1.Rb7! ~ 2.Qd5:#
1... Ra5,Qd1,Rd2 2.Re7,Sg7:,Bf7#
Again cyclic mating permutations, this time type LLL7. Author complains that this original had been sent three years ago - our apologize for the delay! However, even then this complex was not a novelty. [Milan Velimirovic]
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313. Zoran Gavrilovski Macedonia
| 1.Sd1? ~ 2.Rf5(A)#
1... Be6 2.Se3#
(1... f5 2.Re5#)
1... Sf7!
1.Sd3? ~ 2.Rf5(A)/Qd7(B)#
1... Sf7 2.Qb7:#
1... Be6!
1.Sfe4! ~ 2.Qd7(B)#
1... Sf7 2.Sf6:#
1... Be6 2.c6#
1... Ke6 2.Sf6:#
1... Sc6 2.Qc4#
Corrective play of WSf2 produces Barnes threat separation. Content is very rich because actual defences reciprocally appear in tries as defence and defeat, and such combination with Barnes theme has not been realised often, neither is simple to compose. The role of WRf1 in actual play was the biggest constructional problem, which was overcame by the control of f5 after the BKs flight. [Author]
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314. Dragan Stojnic Yugoslavia
| (*1... e3 2.Qe3:#)
1.Qa1! (~)
1... de2,dc2,Bb3:,Bb5:,ef3,gf5,de6,dc6
2.Sde2:,Sc2:,Sb3:,Sb5:,Sf3:,Sf5:,Sde6:,Sc6:#
1... d5,d6,e3 2.Sg6:,Bg7:,Re3:#
S-Wheel and Pickaninny with one changed mate. Task-record. [Author]
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315. Mihail Pavlov Russia
| 1.Qa2? ~ 2.Rg5:#, 1... h6!
1... Be6:,Bg3: 2.Be4,Qd2:#
1.Qf7? ~ 2.Qf5#, 1... hg6!
1... Be6:,Bg3: 2.Qe6:,Rd2:#
1.Se4! ~ 2.Sf6#
1... Kc4:,Ke6: 2.Qa2,Qf7#
Try moves become mate moves in actual play, with two changed mates between tries and completely new post-key play. However, the technical part is not satisfactory for such complex. [Milan Velimirovic]
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