MESON Chess Problem Database
Problem Display
PID: 196283 (q6n/n1NpNB1R/3B1k2/1p2p2K/1P4RP/8/8/8 w - - 0 1)
Way, Charles F
The Observer, 1943
(First published on Sun Apr 4 1943)
#2
9 + 7
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Se8#
- 1...Qg2
- 2.Se8#
- 1...Qf3
- 2.Se8#
- 1...Qe4
- 2.Se8#
- 1...Qd5
- 2.Scxd5#
- 2.Se8#
- 1...Qc6
- 2.Se8#
- 1...Qb7
- 2.Se8#
- 1...Qb8
- 2.Scd5#
- 1...Qc8
- 2.Scd5#
- 1...Qd8
- 2.Scd5#
- 1...Qe8
- 2.Scd5#
- 2.Sxe8#
- 1...Qf8
- 2.Scd5#
- 1...Qg8
- 2.Scd5#
- 1...Sc6
- 2.Scd5#
- 1...Sc8
- 2.Se8#
- 1...Sg6
- 2.Rxg6#
- 1...Sxf7
- 2.Rg6#
- 1...e4
- 2.Rf4#
- 1...Qh1
- Tries
- 1.Bg8?
- 1...Qe8+
- 2.Sxe8#
- 1...Qh1
- 2.Se8#
- 1...Qg2
- 2.Se8#
- 1...Qf3
- 2.Se8#
- 1...Qe4
- 2.Se8#
- 1...Qd5
- 2.Scxd5#
- 2.Se8#
- 1...Qc6
- 2.Se8#
- 1...Qb7
- 2.Se8#
- 1...Qb8
- 2.Scd5#
- 1...Qc8
- 2.Scd5#
- 1...Qd8
- 2.Scd5#
- 1...Qf8
- 2.Scd5#
- 1...Sc6
- 2.Scd5#
- 1...Sc8
- 2.Se8#
- 1...Sg6
- 2.Rxg6#
- 2.Rf7#
- 1...Sf7
- 2.Rg6#
- 2.Rxf7#
- 1...e4
- 2.Rf4#
- 1...Qxg8!
- 1...Qe8+
- 1.Rg1?
- 1...Sxf7
- 2.Rg6#
- 1...Qh1
- 2.Se8#
- 1...Qg2
- 2.Se8#
- 1...Qe4
- 2.Se8#
- 1...Qd5
- 2.Scxd5#
- 2.Se8#
- 1...Qc6
- 2.Se8#
- 1...Qb7
- 2.Se8#
- 1...Qb8
- 2.Scd5#
- 2.Rf1#
- 1...Qc8
- 2.Scd5#
- 2.Rf1#
- 1...Qd8
- 2.Scd5#
- 2.Rf1#
- 1...Qe8
- 2.Scd5#
- 2.Sxe8#
- 2.Rf1#
- 1...Qf8
- 2.Scd5#
- 2.Rf1#
- 1...Qg8
- 2.Scd5#
- 2.Rf1#
- 1...Sc6
- 2.Scd5#
- 2.Rf1#
- 1...Sc8
- 2.Se8#
- 1...Sg6
- 2.Rxg6#
- 1...e4
- 2.Rf1#
- 1...Qf3+!
- 1...Sxf7
- 1.Rg2?
- 1...Qxg2
- 2.Se8#
- 1...Sxf7
- 2.Rg6#
- 1...Qe4
- 2.Se8#
- 1...Qd5
- 2.Scxd5#
- 2.Se8#
- 1...Qc6
- 2.Se8#
- 1...Qb7
- 2.Se8#
- 1...Qb8
- 2.Scd5#
- 2.Rf2#
- 1...Qc8
- 2.Scd5#
- 2.Rf2#
- 1...Qd8
- 2.Scd5#
- 2.Rf2#
- 1...Qe8
- 2.Scd5#
- 2.Sxe8#
- 2.Rf2#
- 1...Qf8
- 2.Scd5#
- 2.Rf2#
- 1...Qg8
- 2.Scd5#
- 2.Rf2#
- 1...Sc6
- 2.Scd5#
- 2.Rf2#
- 1...Sc8
- 2.Se8#
- 1...Sg6
- 2.Rxg6#
- 1...e4
- 2.Rf2#
- 1...Qf3+!
- 1...Qxg2
- 1.Rg3?
- 1...Qf3+
- 2.Rxf3#
- 1...Sxf7
- 2.Rg6#
- 1...Qh1
- 2.Se8#
- 1...Qg2
- 2.Se8#
- 1...Qe4
- 2.Se8#
- 1...Qd5
- 2.Scxd5#
- 2.Se8#
- 1...Qc6
- 2.Se8#
- 1...Qb7
- 2.Se8#
- 1...Qb8
- 2.Scd5#
- 2.Rf3#
- 1...Qc8
- 2.Scd5#
- 2.Rf3#
- 1...Qd8
- 2.Scd5#
- 2.Rf3#
- 1...Qe8
- 2.Scd5#
- 2.Sxe8#
- 2.Rf3#
- 1...Qf8
- 2.Scd5#
- 2.Rf3#
- 1...Qg8
- 2.Scd5#
- 2.Rf3#
- 1...Sc6
- 2.Scd5#
- 2.Rf3#
- 1...Sc8
- 2.Se8#
- 1...Sg6
- 2.Rxg6#
- 1...e4!
- 1...Qf3+
- 1.Rg5?
- threat
- 2.Rf5#
- 1...Qe4
- 2.Se8#
- 2.Sg8#
- 1...Qf3+!
- threat
- 1.Rhg7?
- 1...Sxf7
- 2.R4g6#
- 2.R7g6#
- 1...Sg6
- 2.R4xg6#
- 1...Qh1
- 2.Se8#
- 1...Qg2
- 2.Se8#
- 1...Qf3
- 2.Se8#
- 1...Qe4
- 2.Se8#
- 1...Qd5
- 2.Scxd5#
- 2.Se8#
- 1...Qc6
- 2.Se8#
- 1...Qb7
- 2.Se8#
- 1...Qb8
- 2.Scd5#
- 1...Qc8
- 2.Scd5#
- 1...Qd8
- 2.Scd5#
- 1...Qe8
- 2.Scd5#
- 2.Sxe8#
- 1...Qf8
- 2.Scd5#
- 1...Qg8
- 2.Scd5#
- 1...Sc6
- 2.Scd5#
- 1...Sc8
- 2.Se8#
- 1...e4!
- 1...Sxf7
- 1.Bg8?
- Keys
- 1.Bg6!
- 1...Sxg6
- 2.Rxg6#
- 1...Qh1
- 2.Sg8#
- 1...Qg2
- 2.Sg8#
- 1...Qf3
- 2.Sg8#
- 1...Qe4
- 2.Sg8#
- 1...Qd5
- 2.Sexd5#
- 1...Qc6
- 2.Sg8#
- 1...Qb7
- 2.Sg8#
- 1...Qb8
- 2.Sed5#
- 1...Qc8
- 2.Sed5#
- 1...Qd8
- 2.Sed5#
- 1...Qe8
- 2.Sed5#
- 1...Qf8
- 2.Sed5#
- 1...Qg8
- 2.Sxg8#
- 1...Sc6
- 2.Sed5#
- 1...Sc8
- 2.Sg8#
- 1...Sf7
- 2.Rxf7#
- 1...e4
- 2.Rf4#
- 1...Sxg6
- 1.Bg6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 14
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(f);N_GUARD,P_PINP(C)::S(F)
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD,P_PINR(B)::S(F)
- S(d);S_CUTQ(f)::S(F)
- S(g);N_GUARD::R1(B),XS(g)
- S(g);N_GUARD,XB(H)::R1(B)
- P(b);N_GUARD::R(B)
- Tries
- Try
- B(H);
- Vars
- Q(f);CHECK,N_GUARD::S(F),XQ(f)
- Q(f);N_GUARD,P_PINP(C)::S(F)
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD,P_PINR(B)::S(F)
- S(d);S_CUTQ(f)::S(F)
- P(b);N_GUARD::R(B)
- Refutation
- Q(f);XB(H)
- Try
- R(B);
- Vars
- S(g);N_GUARD,XB(H)::R1(B)
- Q(f);N_GUARD,P_PINP(C)::S(F)
- Q(f);N_GUARD::S(F)
- S(d);S_CUTQ(f)::S(F)
- S(g);N_GUARD::R1(B),XS(g)
- P(b);S_CUTQ(f)::R(B)
- Refutation
- Q(f);CHECK
- Try
- R(B);
- Vars
- Q(f);N_GUARD,XR(B)::S(F)
- S(g);N_GUARD,XB(H)::R1(B)
- Q(f);N_GUARD::S(F)
- S(d);S_CUTQ(f)::S(F)
- S(g);N_GUARD::R1(B),XS(g)
- P(b);S_CUTQ(f)::R(B)
- Refutation
- Q(f);CHECK
- Try
- R(B);
- Vars
- Q(f);CHECK,N_GUARD::R(B),XQ(f)
- S(g);N_GUARD,XB(H)::R1(B)
- Q(f);N_GUARD,P_PINP(C)::S(F)
- Q(f);N_GUARD::S(F)
- S(d);S_CUTQ(f)::S(F)
- S(g);N_GUARD::R1(B),XS(g)
- Refutation
- P(b);
- Try
- R(B);
- Threat
- R1(B)
- Refutation
- Q(f);CHECK
- Try
- R(I);
- Vars
- S(g);N_GUARD::R1(B),XS(g)
- Q(f);N_GUARD,P_PINP(C)::S(F)
- Q(f);N_GUARD::S(F)
- Q(f);N_GUARD,P_PINR(B)::S(F)
- S(d);S_CUTQ(f)::S(F)
- Refutation
- P(b);
- Try
- Actual
- B(H);
- Vars
- S(g);OGATE,XB(H)::R1(B),XS(g)
- Q(f);N_GUARD,P_PINP(C)::S(G)
- Q(f);N_GUARD::S(G)
- Q(f);N_GUARD,P_PINR(B)::S(G)
- Q(f);N_GUARD::S(G),XQ(f)
- Q(f);N_GUARD,P_PINB(H)::S(G)
- S(d);S_CUTQ(f)::S(G)
- S(g);N_GUARD::R1(I),XS(g)
- P(b);N_GUARD::R(B)
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