MESON Chess Problem Database
Problem Display
PID: 270295 (1B3b2/2N1p1p1/3qB1Rp/2p4Q/2KnpkN1/2n1R3/7P/8 w - - 0 1)
de Simoni, Alessandro
Sinfonie Scacchistiche, 1979
#2
9 + 10
| 15601 | Albrecht-Leiss-Degener Collection | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Qe5
- 2.Qxe5#
- 1...Qxc7
- 2.Bxc7#
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qb6
- 2.Sd5#
- 2.Qe5#
- 1...Qc6
- 2.Sd5#
- 2.Qe5#
- 1...Qxe6+
- 2.Sd5#
- 2.Sxe6#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qd8
- 2.Sd5#
- 2.Qe5#
- 1...Sb1
- 2.Sd5#
- 1...Sd1
- 2.Sd5#
- 1...Sa2
- 2.Sd5#
- 1...Sce2
- 2.Sd5#
- 1...Sa4
- 2.Sd5#
- 1...Scb5
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sc2
- 2.Qf5#
- 1...Sde2
- 2.Qf5#
- 1...Sb3
- 2.Qf5#
- 1...Sf3
- 2.Qf5#
- 1...Sdb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...Sxe6
- 2.Sxe6#
- 1...Qe5
- Tries
- 1.Rxc3?
- threat
- 2.Sd5#
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxc7
- 2.Bxc7#
- 1...e3!
- threat
- 1.Rg3?
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxe6+
- 2.Sd5#
- 2.Sxe6#
- 1...Qxc7
- 2.Bxc7#
- 1...Sxe6
- 2.Sxe6#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Sd5#
- 2.Qe5#
- 1...Qc6
- 2.Sd5#
- 2.Qe5#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qd8
- 2.Sd5#
- 2.Qe5#
- 1...Sb1
- 2.Sd5#
- 1...Sd1
- 2.Sd5#
- 1...Sa2
- 2.Sd5#
- 1...Sce2
- 2.Sd5#
- 1...Sa4
- 2.Sd5#
- 1...Scb5
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sc2
- 2.Qf5#
- 1...Sde2
- 2.Qf5#
- 1...Sb3
- 2.Qf5#
- 1...Sf3
- 2.Qf5#
- 1...Sdb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...e3!
- 1...Qd5+
- 1.Rh3?
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxe6+
- 2.Sd5#
- 2.Sxe6#
- 1...Qxc7
- 2.Bxc7#
- 1...Sxe6
- 2.Sxe6#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Sd5#
- 2.Qe5#
- 1...Qc6
- 2.Sd5#
- 2.Qe5#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qd8
- 2.Sd5#
- 2.Qe5#
- 1...Sb1
- 2.Sd5#
- 1...Sd1
- 2.Sd5#
- 1...Sa2
- 2.Sd5#
- 1...Sce2
- 2.Sd5#
- 1...Sa4
- 2.Sd5#
- 1...Scb5
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sc2
- 2.Qf5#
- 1...Sde2
- 2.Qf5#
- 1...Sb3
- 2.Qf5#
- 1...Sf3
- 2.Qf5#
- 1...Sdb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...e3!
- 1...Qd5+
- 1.Rxg7?
- threat
- 2.Qxh6#
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxe6+
- 2.Sd5#
- 2.Sxe6#
- 1...Sxe6
- 2.Sxe6#
- 2.Rf7#
- 2.Qf7#
- 1...Qe5
- 2.Qxe5#
- 1...Sf3
- 2.Rf7#
- 2.Qf7#
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Bxg7!
- threat
- 1.Qh3?
- threat
- 2.Qg3#
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Sxe6
- 2.Qf1#
- 1...Sce2
- 2.Sd5#
- 1...Sde2
- 2.Qf1#
- 1...Sf5
- 2.Qf1#
- 1...Qxe6+!
- threat
- 1.Qh4?
- threat
- 2.Qg3#
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Sxe6
- 2.Qf2#
- 1...Sce2
- 2.Sd5#
- 1...Sde2
- 2.Qf2#
- 1...Sf5
- 2.Qf2#
- 1...Qxe6+!
- threat
- 1.Qxc5?
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxe6+
- 2.Sxe6#
- 1...Qxc7
- 2.Bxc7#
- 2.Qxc7#
- 1...Sxe6
- 2.Sxe6#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Sd5#
- 2.Qe5#
- 1...Qc6
- 2.Sd5#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qd8
- 2.Sd5#
- 2.Qe5#
- 1...Sb1
- 2.Sd5#
- 1...Sd1
- 2.Sd5#
- 1...Sa2
- 2.Sd5#
- 1...Sce2
- 2.Sd5#
- 1...Sa4
- 2.Sd5#
- 1...Scb5
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sc2
- 2.Qf5#
- 1...Sde2
- 2.Qf5#
- 1...Sb3
- 2.Qf5#
- 1...Sf3
- 2.Qf5#
- 1...Sdb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...h5
- 2.Qg5#
- 1...Qxc5+!
- 1...Qd5+
- 1.h3?
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxe6+
- 2.Sd5#
- 2.Sxe6#
- 1...Qxc7
- 2.Bxc7#
- 1...Sxe6
- 2.Sxe6#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Sd5#
- 2.Qe5#
- 1...Qc6
- 2.Sd5#
- 2.Qe5#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qd8
- 2.Sd5#
- 2.Qe5#
- 1...Sb1
- 2.Sd5#
- 1...Sd1
- 2.Sd5#
- 1...Sa2
- 2.Sd5#
- 1...Sce2
- 2.Sd5#
- 1...Sa4
- 2.Sd5#
- 1...Scb5
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sc2
- 2.Qf5#
- 1...Sde2
- 2.Qf5#
- 1...Sb3
- 2.Qf5#
- 1...Sdb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...Sf3!
- 1...Qd5+
- 1.h4?
- 1...Qd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxe6+
- 2.Sd5#
- 2.Sxe6#
- 1...Qxc7
- 2.Bxc7#
- 1...Sxe6
- 2.Sxe6#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Sd5#
- 2.Qe5#
- 1...Qc6
- 2.Sd5#
- 2.Qe5#
- 1...Qd7
- 2.Sd5#
- 2.Qe5#
- 1...Qd8
- 2.Sd5#
- 2.Qe5#
- 1...Sb1
- 2.Sd5#
- 1...Sd1
- 2.Sd5#
- 1...Sa2
- 2.Sd5#
- 1...Sce2
- 2.Sd5#
- 1...Sa4
- 2.Sd5#
- 1...Scb5
- 2.Sd5#
- 1...Sd5
- 2.Sxd5#
- 1...Sc2
- 2.Qf5#
- 1...Sde2
- 2.Qf5#
- 1...Sb3
- 2.Qf5#
- 1...Sdb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...Sf3!
- 1...Qd5+
- 1.Rxc3?
- Keys
- 1.Qd5!
- 1...Qxd5+
- 2.Sxd5#
- 1...Qa6+
- 2.Sxa6#
- 1...Qxc7
- 2.Bxc7#
- 1...Qxe6
- 2.Sxe6#
- 1...Sxd5
- 2.Sxd5#
- 1...Sxe6
- 2.Sxe6#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Qe5#
- 1...Qc6
- 2.Qe5#
- 1...Qd7
- 2.Qe5#
- 1...Qd8
- 2.Qe5#
- 1...Sb1
- 2.Qxe4#
- 1...Sd1
- 2.Qxe4#
- 1...Sa2
- 2.Qxe4#
- 1...Sce2
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Scb5
- 2.Qxe4#
- 1...Sc2
- 2.Qf5#
- 1...Sde2
- 2.Qf5#
- 1...Sb3
- 2.Qf5#
- 1...Sf3
- 2.Qf5#
- 1...Sdb5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Sc6
- 2.Qf5#
- 1...h5
- 2.Qg5#
- 1...Qxd5+
- 1.Qd5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);OGATE,P_SPINQ(f),XS(H)::B(I),XQ(f)
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- S(b);XB(F)::S(H),XS(b)
- Tries
- Try
- R(B);XS(a)
- Threat
- S(H)
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);OGATE,P_SPINQ(f),XS(H)::B(I),XQ(f)
- Refutation
- P(c);
- Try
- R(B);
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);OGATE,P_SPINQ(f),XS(H)::B(I),XQ(f)
- S(b);XB(F)::S(H),XS(b)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- Refutation
- P(c);
- Try
- R(B);
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);OGATE,P_SPINQ(f),XS(H)::B(I),XQ(f)
- S(b);XB(F)::S(H),XS(b)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- Refutation
- P(c);
- Try
- R(G);XP(i)
- Threat
- QAB(E),XP(g)
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- S(b);N_GUARD::QAR1(E),XS(b)
- Refutation
- B(j);XR(G)
- Try
- Q(E);
- Threat
- QAB1(E)
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- S(b);N_GUARD,XB(F)::QAR(E)
- S(a);N_GUARD::S(H)
- S(b);N_GUARD::QAR(E)
- Refutation
- Q(f);CHECK,XB(F)
- Try
- Q(E);
- Threat
- QAB1(E)
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- S(b);N_GUARD,XB(F)::QAR2(E)
- S(a);N_GUARD::S(H)
- S(b);N_GUARD::QAR2(E)
- Refutation
- Q(f);CHECK,XB(F)
- Try
- Q(E);XP(e)
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);CHECK,XB(F)::B(I)+S(H),DCHECK,XQ(f)
- S(b);XB(F)::S(H),XS(b)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);P_PINQ(E)::B(I)+S(H),DCHECK
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- P(g);N_GUARD::QAB1(E)
- Refutation
- Q(f);CHECK,XQ(E)
- Try
- P(A);
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);OGATE,P_SPINQ(f),XS(H)::B(I),XQ(f)
- S(b);XB(F)::S(H),XS(b)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- Refutation
- S(b);
- Try
- P(A);
- Vars
- Q(f);CHECK::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);OGATE,P_SPINQ(f),XS(H)::B(I),XQ(f)
- S(b);XB(F)::S(H),XS(b)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- Refutation
- S(b);
- Try
- Actual
- Q(E);
- Vars
- Q(f);CHECK,XQ(E)::B(I)+S(H),DCHECK,XQ(f)
- Q(f);CHECK::B(I)+S(H),XQ(f)
- Q(f);OGATE,P_SPINQ(f),XS(H)::B(I),XQ(f)
- Q(f);P_PINQ(E),XB(F)::B(I)+S(H),DCHECK,XQ(f)
- S(a);XQ(E)::S(H),XS(a)
- S(b);XB(F)::S(H),XS(b)
- Q(f);N_GUARD::QAB1(E),XQ(f)
- Q(f);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E),XP(c)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- P(g);N_GUARD::QAB1(E)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).