MESON Chess Problem Database
Problem Display
PID: 55623 (7q/2P1bPn1/1pBPk1P1/4N1P1/p2PN3/8/8/K4Q2 w - - 0 1)
Mansfield, Comins
Europe Echecs, 1976
#2
11 + 6
| 4054 | Complete Mansfield/III | 1999 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.c8Q#
- 2.c8B#
- 1...Qh2
- 2.c8Q#
- 2.c8B#
- 1...Qh3
- 2.c8Q#
- 2.c8B#
- 1...Qh4
- 2.c8Q#
- 2.c8B#
- 1...Qh5
- 2.c8Q#
- 2.c8B#
- 1...Qh6
- 2.c8Q#
- 2.c8B#
- 1...Qh7
- 2.c8Q#
- 2.c8B#
- 1...Qg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bxd6
- 2.Qf6#
- 1...Bf6
- 2.Qxf6#
- 1...Bd8
- 2.c8Q#
- 2.c8B#
- 1...Bf8
- 2.Qf6#
- 2.c8Q#
- 2.c8B#
- 1...Sf5
- 2.Qc4#
- 1...Sh5
- 2.Qh3#
- 1...Se8
- 2.c8Q#
- 2.c8B#
- 1...Qh1
- Tries
- 1.Sc4?
- threat
- 2.d5#
- 1...Bxd6
- 2.Qf6#
- 1...Bf6
- 2.Qxf6#
- 1...Sh5
- 2.Qh3#
- 1...Se8
- 2.c8Q#
- 2.c8B#
- 1...Sf5!
- threat
- 1.Sg4?
- threat
- 2.d5#
- 1...Bxd6
- 2.Qf6#
- 1...Bf6
- 2.Qxf6#
- 1...Sf5
- 2.Qc4#
- 1...Se8
- 2.c8Q#
- 2.c8B#
- 1...Sh5!
- threat
- 1.Sd7?
- threat
- 2.d5#
- 1...Bxd6
- 2.Qf6#
- 1...Bf6
- 2.Qxf6#
- 1...Sf5
- 2.Qc4#
- 1...Sh5
- 2.Qh3#
- 1...Se8!
- threat
- 1.Qh3+?
- 1...Qxh3
- 2.c8Q#
- 2.c8B#
- 1...Sf5!
- 1...Qxh3
- 1.Qf4?
- threat
- 2.d5#
- 1...Bxd6
- 2.Qf6#
- 1...Qh1+!
- threat
- 1.f8Q?
- threat
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.c8Q#
- 2.c8B#
- 1...Bxg5
- 2.Sxg5#
- 2.Qc4#
- 2.Q1f7#
- 2.Q8f7#
- 2.c8Q#
- 2.c8B#
- 1...Bxd6
- 2.Qc4#
- 2.Qxd6#
- 2.Q1f6#
- 2.Q1f7#
- 2.Q8f6#
- 2.Q8f7#
- 2.c8Q#
- 2.c8B#
- 1...Bxf8
- 2.Qf6#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh2
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.Qc8#
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh3
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.Qc8#
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh4
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.Qc8#
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh5
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.Qc8#
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh6
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.Qc8#
- 2.Qg8#
- 2.c8Q#
- 2.c8B#
- 1...Qh7
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.Qc8#
- 2.c8Q#
- 2.c8B#
- 1...Bf6
- 2.Q1xf6#
- 2.Q8xf6#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Bd8
- 2.Qc4#
- 2.Q1f7#
- 2.Q8f7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Sh5
- 2.Qh3#
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f5#
- 2.Q1f7#
- 2.Q8f5#
- 2.Q8f7#
- 2.c8Q#
- 2.c8B#
- 1...Se8
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f5#
- 2.Q1f7#
- 2.Q8f5#
- 2.Q8f7#
- 2.c8Q#
- 2.c8B#
- 1...a3
- 2.Qc4#
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.c8Q#
- 2.c8B#
- 1...b5
- 2.Qxe7#
- 2.Q1f7#
- 2.Q8f7#
- 2.c8Q#
- 2.c8B#
- 1...Qxf8!
- threat
- 1.f8S+?
- 1...Bxf8
- 2.Qf6#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qxf8!
- 1...Bxf8
- 1.f8B?
- threat
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Bxg5
- 2.Sxg5#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Bxd6
- 2.Qf6#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Bxf8
- 2.Qf6#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh1
- 2.c8Q#
- 2.c8B#
- 1...Qh2
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh3
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh4
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh5
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh6
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh7
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qg8
- 2.c8Q#
- 2.c8B#
- 1...Bf6
- 2.Qxf6#
- 2.c8Q#
- 2.c8B#
- 1...Bd8
- 2.Qf7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Sf5
- 2.Qc4#
- 2.c8Q#
- 2.c8B#
- 1...Sh5
- 2.Qh3#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Se8
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...a3
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...b5
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qxf8!
- threat
- 1.f8R?
- threat
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Bxg5
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Bxd6
- 2.Qf6#
- 2.Qf7#
- 1...Bxf8
- 2.Qf6#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh2
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh3
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh4
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh5
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh6
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qh7
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qg8
- 2.Qc4#
- 2.c8Q#
- 2.c8B#
- 1...Bd8
- 2.Qc4#
- 2.Qf7#
- 2.cxd8S#
- 2.c8Q#
- 2.c8B#
- 1...Sf5
- 2.Qc4#
- 2.Qxf5#
- 2.c8Q#
- 2.c8B#
- 1...Sh5
- 2.Qh3#
- 2.Qc4#
- 2.Qf5#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Se8
- 2.Qc4#
- 2.Qf5#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...a3
- 2.Qc4#
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...b5
- 2.Qf7#
- 2.c8Q#
- 2.c8B#
- 1...Qxf8!
- threat
- 1.Sc4?
- Keys
- 1.Sd3!
- threat
- 2.d5#
- 1...Bxd6
- 2.Qf6#
- 1...Bf6
- 2.Qxf6#
- 1...Sf5
- 2.Sf4#
- 1...Sh5
- 2.Qh3#
- 1...Se8
- 2.c8Q#
- 2.c8B#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(f);N_GUARD,P_PINQ(B)::P=Q
- Q(f);N_GUARD::P=Q
- Q(f);OGATE::PXQ(f)=Q
- B(d);N_GUARD,XP(H)::QAR1(B)
- B(d);N_GUARD::QAR1(B),XB(d)
- B(d);S_CUTQ(f)::P=Q
- S(e);SBLOCK::QAB(B)
- S(e);N_GUARD,S_CUTQ(f)::QAB(B)
- S(e);S_CUTQ(f)::P=Q
- Tries
- Try
- S(E);
- Threat
- P(C)
- Vars
- B(d);N_GUARD,XP(H)::QAR1(B)
- B(d);N_GUARD,P_PINP(C)::QAR1(B),XB(d)
- S(e);N_GUARD,P_PINP(C),S_CUTQ(f)::QAB(B)
- S(e);P_PINP(C),S_CUTQ(f)::P=Q
- Refutation
- S(e);P_PINP(C)
- Try
- S(E);
- Threat
- P(C)
- Vars
- B(d);N_GUARD,XP(H)::QAR1(B)
- B(d);N_GUARD,P_PINP(C)::QAR1(B),XB(d)
- S(e);P_PINP(C),SBLOCK::QAB(B)
- S(e);P_PINP(C),S_CUTQ(f)::P=Q
- Refutation
- S(e);P_PINP(C)
- Try
- S(E);
- Threat
- P(C)
- Vars
- B(d);N_GUARD,XP(H)::QAR1(B)
- B(d);N_GUARD,P_PINP(C)::QAR1(B),XB(d)
- S(e);P_PINP(C),SBLOCK::QAB(B)
- S(e);N_GUARD,P_PINP(C),S_CUTQ(f)::QAB(B)
- Refutation
- S(e);P_PINP(C)
- Try
- Q(B);CHECK
- Vars
- Q(f);XQ(B)::P=Q
- Refutation
- S(e);P_SPINS(e)
- Try
- Q(B);
- Threat
- P(C)
- Vars
- B(d);N_GUARD,XP(H)::QAR1(B)
- Refutation
- Q(f);CHECK
- Try
- P(K);
- Threat
- DUALS(6)
- Refutation
- Q(f);XQ(K)
- Try
- P(K);CHECK
- Refutation
- Q(f);XS(K)
- Try
- P(K);
- Threat
- DUALS(3)
- Vars
- Q(f);P_PINQ(B)::P=Q
- Q(f);::P=Q
- Refutation
- Q(f);XB(K)
- Try
- P(K);
- Threat
- DUALS(4)
- Refutation
- Q(f);XR(K)
- Try
- Actual
- S(E);
- Threat
- P(C)
- Vars
- B(d);N_GUARD,XP(H)::QAR1(B)
- B(d);N_GUARD,P_PINP(C)::QAR1(B),XB(d)
- S(e);P_PINP(C),SBLOCK::S(E)
- S(e);N_GUARD,P_PINP(C),S_CUTQ(f)::QAB(B)
- S(e);P_PINP(C),S_CUTQ(f)::P=Q
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).