To read the solutions and comments hold down the left mouse key and run the cursor across the blank area.

W. E. Lester
Solution: set 1....Gg8 2.Qf6‡
Comments: A similar setting with BP instead of G (WKb3, WQ6, BKa5, BPa7) has dual 1.Ka3 a6 2Qc5‡ 

P. H. Torngren
Solution: set 1....Gh5 2.Pb8(Q/R)‡ play 1.Pb8(B) Gh5/Ga8 2.Be5‡ Comments: Irreversible move from 8th rank (could be set with unorthodox BP e8). 

T. R. Dawson
Solution: set 1....Gg8 2.Ra7‡
Comments: Echo. Irreversible moves. 

W. E. Lester
Solution: set (in both) 1....a2 2.Ga4‡
Comments: Echo (a), Mutate (b). 

A. Kniest
Solution:


T. R. Dawson
Solution: 1.Kf5 Gd8/Gf8 2.dRe7/fRe7‡ Comments: Selfblocks. Careful key (f5 is only cell where K does not provide hurdle for G


T. R. Dawson
Solution: set 1....Gg2 2.Gh1‡ play 1.Gc6 Gb7 2.Ga8‡ Comments: Leapfrog. Threecorner rattler 

T. R. Dawson
Solution: 1.Sb5 Ga4/Gc4 2.Sc7/Pb7‡ Comments: Stalemate set. Antipins 

W. Alaikow
Solution: 1.Pe8(G) Kh6/Pg5 2.Q×g6/Qh3‡ Comments: WK moved from a1 so that the pin of Gf7 has point. 

W. E. Lester
Solution: set 1....Pb2 2.Sb3‡ play 1.Gb4 Pb2 2.Sc2‡ Comments: Exact Echo. Reflection in diagonal. 

T. R. Dawson
Solution: set 1....Pc2 2.Gb2‡ play 1.Rf7 Pc2/Kg8 2.Rf8‡ Comments: Give key 

Z. Mach
Solution: 1.Gd1 Ka5/Ka3/Pa5 2.Sb3/Rb3/Rb3‡ Comments: Each white piece gives check in one of the mates. 

J. J. Burbach
Solution: 1.Kc4 (threat 2.Qb4‡) 1... Gaa4 2.Qb5‡ 1... Gca4 2.Qc3‡ Comments: Queen cannot enter cells between BG and WK due to selfcheck (Nip, opposite of Pin). 

C. P. Jarman & J. E. H. Creed
Solution: Set: 1... Gb5 2.Ga6‡


J. Oudot
Solution: 1.Qa2 1... Ga3 2.Q×b1‡ 1... Gc1 2.Qe2‡ 1... Ge4 2.Q×a1‡ 1... Ge1 2.Qc2‡
Comments: Nip. 

W. E. Lester
Solution: Set: 1... Gb3 2.Qc5‡ 1... Gb4 2.Qd3‡
Comments: Changed mates (mutate). BGs just block. 

W. Pauly
Solution: Set: 1... Kf5 2.Qe5‡ Play: 1.Qd3 Ge4 2.Qf1‡ Comments: BG not used in set play 

C. E. Kemp
Solution: 1.Kh5 1... g6† 2.S×g6‡ 1... Gg6 2.Ge5‡ 1... Kh7 2.Sg6‡ Comments: Each white piece gives check in one of the mates. 

G. C. Alvey
Solution: 1.Qb5 1... Kc7 2.b8=Q‡
Comments: Compare similar problem with KRSGP by same composer. 

L. Monvoisin
Solution: 1.Rb2 (threat Rb8‡) Rb6/Rf2† 2.R×b6/R×f2 ‡
Comments: Stalemate set. 

T. R. Dawson
Solution: Set: 1... e5 2.Qf3‡ 1... Gf5 2.Qd4‡
Comments: Changed mates. Pendulum key. BG merely selfblocks.


T. R. Dawson
Solution: Set: 1... Gf8 e7×f8(S)‡ Play: 1.Kd8 Ge8 2.d7×e8(G)‡ Comments: 

T. R. Dawson
Solution: 1.Gd4 Ka1/Ka3 2.Qb2/Qa7 ‡ Comments: WG guards two flights and prevents c3xQb2 (antipin) 

J. Stewart
Solution: (a) 1.e5 Gb4 2.Rbc3‡
Comments: BG irrelevant in second (b) mate. 

T. R. Dawson
Solution: 1.Kc8 Gc3/Ga8 2.b8(S)/b7×a8(G) ‡ Comments: BG irrelevant in first mate, and eliminated in second, but justifies promotion to G. 

E. J. van den Berg
Solution: Set: 1... g5 Gh5‡ 1... d2 Hd1‡ Play: 1.Gd2 g5 2.Gh6‡ 

G. P. Bowell
Solution: 1.Be4 Ge5 2.Bb1‡ Comments: Switchback. Irreversible G move. (WP added g2 since otherwise Qg1 is also mate.) 

A. Zickermann
Solution: Set 1... Gd6/Gf6/Gf4 2.Qg5/Qh2/Qe6 ‡
Comments: Pendulum key. dG merely blocks BK, while bG blocks dG. 

G. C. Alvey
Solution: 1.Sd6 1... Ka7 2.b8(Q)‡ 1...G×b7/Ge7 2.Ra6‡ Comments: Masked battery.


H. Albertz
Solution: 1.Gh4 1...Kd4 2.Rd2‡(set) 1...e4 2.Sf2‡ Comments: G4 does not feature in the first mate. 

T. R. Dawson
Solution: 1.Gb8 b6/b5 2.Bb5/Bb3 ‡ Comments: Changing of the guard on Bb4 and checking B. 

T. R. Dawson
Solution: 1.Bc3 Sg5/Selse 2.Bg7/Bd2 ‡ Comments: Antipin. 

W. E. Lester
Solution: Set: 1... c5 2.Sb5‡ Play: 1.Gd6 c5 2.Bb4‡ Comments: Simultaneous guard and antipin. 

C. G. Rains
Solution: 1.Gc1 b4/c5/c×d5/K×c5 2.Sdc3/Sec3/Bc3/Bb3 ‡ Comments: Flightgiving key. Three antibattery mates. 

C. G. Rains
Solution: 1.Bf4 1... a×b1/Kg1/Gf5/Ge4/Gb7 2.R×b1/Gh1/Gg6/Gf5/Gb8 ‡ Comments: BGg7 is not essential. "Didactic rather than problematic". 

W.E.Lester
Solution: Set: 1...d5/Gd5 2.Nf4‡
Comment: Mutate. A sort of Grimshaw; but each piece is not merely interfered with by the other but totally immobilised so that WG can use it as a hurdle to give check. * The position was corrected in the December issue, all pieces except Ra7, Ga5 being moved one file right to avoid a dual. 

T.R.Dawson
Solution: 1.Bh7 Ge8/Gf2/Gh8/Ga8/G×a2 2.Bb1/Gh8/G×h8/G×a8/Rb1‡ Comment: Cornerrattler 

T.R.Dawson
Solution: 1.Gf4 K×f4/else 2.Ngf5/Ndf5‡ Comment: Key piece vacates a K flight square (impossible in orthodox chess). 

G.Leathem
Solution: 1.Gbd1 (threat 2.Qb1‡)
Comment: Three pins and antipins of BQ. 

Jan Mortensen
Solution: 1.Qd8 (four threats) 1... B×g4 2.Qf8‡ 1... g×f5 2.e8(Q)‡ 1... e4 2.e8(G)‡ 1... Gd7 2.e8(S)‡ Comments: Fleck theme. QP battery. 

Jan Mortensen
Solution: 1.Qc2 threat 2.Bh3‡ 1... Bd2 2.Ga6‡ 1... Rd2 2.Gf6‡ 1... R×e2 2.Q×e2‡ Comments: Gamage theme. R/B mutual interference. 

Jan Mortensen
Solution: 1.a8(S) threat 2.Sb6‡ 1... Bb4 2.Gd7‡ 1... Qb4 2.Gc6‡ Comments: Dual avoidance. 

C. G. Rains
Solution: 1.Bg5 (waiting) Rb1/Rc1/g3/Rd1/Re1†/R×f1 2.Kd3/Ke3/Kf3/K×d1/K×e1/K×f1‡ Comments: Task problem 6 GK battery mates. 

D. A. Smedley
Solution: Set: 1... G~/Kf3 2.Gcf4/G1f4 Play: 1.Ke7 (threat 2.Gcf4) Kf3/Kd5/Ke5 2.G1f4/Gbf4/Gef4 ‡ Comments: A blockthreat with two added flights. Each flight is answered by Gf4 but a different G each time. 

Jan Mortensen
Solution: 1.Se4 threat 2.Rd6‡ 1... R×e4 G2f5‡ 1... S×e4 2.G8f5‡
Comments: Dual Avoidance. 

Jan Mortensen
Solution: 1.Kc2 threat 2.Rd3‡ 1... Sde5 2.Gf4‡ 1... Sge5 2.Ge6‡
Comments: Dual avoidance. 

C. G. Rains
Solution: 1.Ke8 1... c5/c6 2.Qg7‡ 1... R×e2†/Q×e2‡
Comments: G battery. 

C. G. Rains
Solution: 1.Rc7 (threat 2.B×d5‡)
Comments: Task problem. Six openings of GK battery. 

G.C.Alvey
Solution: 1.c4 (threat 2.Qd5‡)
Comment: Remarkable variety of motives. 

T.R.Dawson & J.E.H.Creed
Solution: 1.Ne3 (unpin) Ge1/Gb8/Gf8 2.N3g4/N5g4/Bg4‡ Comment: The piece over which the BG could hop to block the check line moves to act as the hurdle for the check. 

Jan Mortensen
Solution: 1.Bd1 threat (Bb2/Sd6) R×c3‡ 1... Belse/Selse 2.R×a2/Q×a3 ‡ Comments: "Schwalbe 117 Theme" 

Jan Mortensen
Solution: 1.Rd8 threat (Sd6/Sc5) 2.Bc6‡ 1... Sfelse/Sdelse Rd4/Re5‡ Comments: "Schwalbe 117 Theme" 

Jan Mortensen
Solution: 1.Bd4 threat 2.Qe2‡ 1... Sdf4 2.Gf3‡ 1... Sgf4 2.Gf5‡
Comments: Dual avoidance. 

R. Brain
Solution: 1.Se3
Comments: Spoilt by dual. 

C. G. Rains
Solution: 1.Rf7 1...B×h4/Bfelse/Bf3/Bdelse 2.Gf5/Rff5/Shf5/B(×)e2‡
Comments: Task problem. G mate by interposition. Six men play to f5. 

Jan Mortensen
Solution: 1.Qf6 Threat (Sc6/Se4) 2.Qf7‡ 1... Seelse/Sfelse 2.Sb4/Q×f3 ‡ Comments: "Schwalbe 117 Theme" 

Jan Mortensen
Solution: 1.Bg7 threat (Se3/Bd5) 2.B×f6‡ 1... Selse/Belse 2.Sc2/Ra4 ‡ Comments: "Schwalbe 117 Theme". 

R. Brain
Solution: 1.Sd8
Comments: Cyclic interferences at c6. 

C. G. Rains
Solution: 1.Bh4 (Threat 2.Q×f7‡) 1... f6 2.Qh7‡
Comments: Task problem, 11 GQ battery mates. 

Jan Mortensen
Solution: 1.Gg3 three threats 1... S×g6/Sc4/Sf7 2.Be5/Bb4/Qf8 ‡ Comments: PseudoFleck. All other S moves are blocked. 

C. G. Rains
Solution: 1.h4 (threat 2.Gh2‡) Qg7 2.G×h8††‡
Comments: Task problem. Nine openings of RG battery. 

Jan Mortensen
Solution: 1.g7 threat (Se4/Be5) g8(Q)‡ 1... Sfelse/Belse 2.e4/Rd6 ‡ Comments: "Schwalbe 117 Theme" 

Composer
Solution: 1. ‡ Comments: 