MESON Chess Problem Database
Problem Display
PID: 11204 (2bBB3/1N1R4/4K2n/5R2/k3PQ2/Pp5q/1P6/1N6 w - - 0 1)
Neale, Harry R
Chess, 1937
#2
11 + 5
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sc3#
- 2.Ra5#
- 1...Qg2
- 2.Sc3#
- 2.Ra5#
- 1...Qg4
- 2.Sc3#
- 1...Qh1
- 2.Sc3#
- 2.Ra5#
- 1...Qh2
- 2.Sc3#
- 2.Ra5#
- 1...Qc3
- 2.Sxc3#
- 1...Qd3
- 2.Ra5#
- 1...Qe3
- 2.Ra5#
- 1...Qf3
- 2.Ra5#
- 1...Qg3
- 2.Ra5#
- 1...Qh4
- 2.Sc3#
- 2.Ra5#
- 1...Qh5
- 2.Sc3#
- 1...Bxb7
- 2.Rd4#
- 2.Rxb7#
- 1...Bxd7+
- 2.Bxd7#
- 1...Sg4
- 2.Ra5#
- 1...Qf1
- Tries
- 1.Qc1?
- threat
- 2.Qc4#
- 2.Qc6#
- 1...Bxd7+
- 2.Bxd7#
- 1...Bxb7
- 2.Rd4#
- 2.Rxb7#
- 2.Qc4#
- 1...Qf1
- 2.Sc3#
- 2.Ra5#
- 1...Qc3
- 2.Sxc3#
- 1...Qd3
- 2.Ra5#
- 1...Qxf5+!
- threat
- 1.Qd2?
- threat
- 2.Qb4#
- 2.Qa5#
- 2.Qd4#
- 1...Bxd7+
- 2.Bxd7#
- 2.Qxd7#
- 1...Sxf5
- 2.Qb4#
- 2.Qa5#
- 1...Qf1
- 2.Sc3#
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qc3
- 2.Sxc3#
- 1...Qd3
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qe3
- 2.Ra5#
- 2.Qb4#
- 2.Qa5#
- 1...Qxf5+!
- threat
- 1.Qe3?
- threat
- 2.Sc3#
- 2.Qd4#
- 2.Qa7#
- 1...Bxd7+
- 2.Bxd7#
- 1...Qxe3
- 2.Ra5#
- 1...Bxb7
- 2.Sc3#
- 2.Rd4#
- 2.Rxb7#
- 2.Qd4#
- 1...Sxf5
- 2.Sc3#
- 1...Qf1
- 2.Sc3#
- 2.Ra5#
- 1...Qxf5+!
- threat
- 1.Qg3?
- threat
- 2.Sc3#
- 1...Bxd7+
- 2.Bxd7#
- 1...Qxg3
- 2.Ra5#
- 1...Qxf5+!
- threat
- 1.Qe5?
- threat
- 2.Qd4#
- 2.Qa5#
- 2.Qb5#
- 1...Bxd7+
- 2.Bxd7#
- 1...Sxf5
- 2.Qa5#
- 1...Qf1
- 2.Sc3#
- 2.Qa5#
- 1...Qc3
- 2.Sxc3#
- 2.Qb5#
- 1...Qd3
- 2.Qa5#
- 1...Qe3
- 2.Qa5#
- 2.Qb5#
- 1...Qxf5+!
- threat
- 1.Qd6?
- threat
- 2.Qb4#
- 2.Qd4#
- 2.Qa6#
- 2.Qc6#
- 1...Bxd7+
- 2.Bxd7#
- 2.Qxd7#
- 1...Bxb7
- 2.Rxb7#
- 2.Qb4#
- 2.Qd4#
- 1...Sxf5
- 2.Qb4#
- 2.Qa6#
- 2.Qc6#
- 1...Qf1
- 2.Sc3#
- 2.Ra5#
- 2.Qb4#
- 1...Qc3
- 2.Sxc3#
- 1...Qd3
- 2.Ra5#
- 2.Qb4#
- 1...Qe3
- 2.Ra5#
- 2.Qb4#
- 2.Qa6#
- 2.Qc6#
- 1...Qxf5+!
- threat
- 1.Qc7?
- threat
- 2.Qa5#
- 2.Qc4#
- 2.Qc6#
- 1...Bxd7+
- 2.Bxd7#
- 2.Qxd7#
- 1...Bxb7
- 2.Rd4#
- 2.Qa5#
- 2.Qc4#
- 1...Qf1
- 2.Sc3#
- 2.Ra5#
- 2.Qa5#
- 1...Qc3
- 2.Sxc3#
- 1...Qd3
- 2.Ra5#
- 2.Qa5#
- 1...Qxf5+!
- threat
- 1.Qb8?
- threat
- 2.Sc5#
- 2.Qa7#
- 2.Qa8#
- 1...Bxd7+
- 2.Bxd7#
- 1...Bxb7
- 2.Rd4#
- 2.Rxb7#
- 1...Sxf5
- 2.Sc5#
- 1...Qf1
- 2.Sc3#
- 2.Sc5#
- 2.Ra5#
- 1...Qc3
- 2.Sxc3#
- 1...Qd3
- 2.Sc5#
- 2.Ra5#
- 1...Qe3
- 2.Ra5#
- 1...Qxf5+!
- threat
- 1.Qf1?
- threat
- 2.Sc5#
- 2.Qc4#
- 2.Qb5#
- 2.Qa6#
- 1...Bxd7+
- 2.Bxd7#
- 1...Qxf1
- 2.Sc3#
- 2.Ra5#
- 1...Bxb7
- 2.Rd4#
- 2.Rxb7#
- 2.Qc4#
- 2.Qb5#
- 1...Sxf5
- 2.Sc5#
- 2.Qc4#
- 2.Qa6#
- 1...Qc3
- 2.Sxc3#
- 2.Qb5#
- 1...Qd3
- 2.Ra5#
- 1...Qe3
- 2.Ra5#
- 2.Qc4#
- 2.Qb5#
- 2.Qa6#
- 1...Qxf5+!
- threat
- 1.Qf3?
- threat
- 2.Sc3#
- 1...Bxd7+
- 2.Bxd7#
- 1...Qxf3
- 2.Ra5#
- 1...Qxf5+!
- threat
- 1.Qg4?
- threat
- 2.Ra5#
- 1...Bxd7+
- 2.Bxd7#
- 1...Qxg4
- 2.Sc3#
- 1...Qc3
- 2.Sxc3#
- 1...Qh5
- 2.Sc3#
- 1...Sxf5!
- threat
- 1.Qc1?
- Keys
- 1.Sd6!
- threat
- 2.e5#
- 1...Qxf5+
- 2.exf5#
- 1...Bxd7+
- 2.Bxd7#
- 1...Sxf5
- 2.exf5#
- 1...Qf1
- 2.Sc3#
- 2.Ra5#
- 1...Qg2
- 2.Sc3#
- 2.Ra5#
- 1...Qg4
- 2.Sc3#
- 1...Qh1
- 2.Sc3#
- 2.Ra5#
- 1...Qh2
- 2.Sc3#
- 2.Ra5#
- 1...Qc3
- 2.Sxc3#
- 1...Qd3
- 2.Ra5#
- 1...Qe3
- 2.Ra5#
- 1...Qf3
- 2.Ra5#
- 1...Qg3
- 2.Ra5#
- 1...Qh4
- 2.Sc3#
- 2.Ra5#
- 1...Ba6
- 2.Ra7#
- 1...Bb7
- 2.Rxb7#
- threat
- 1.Sd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- Q(b);N_GUARD::S(A)
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A),XQ(b)
- Q(b);N_PINR(F),P_PINR(I)::R1(F)
- Q(b);N_PINR(F),P_PINP(D),P_PINR(I)::R1(F)
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A)
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- S(d);N_PINR(F),P_PINR(I)::R1(F)
- Tries
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A),XQ(b)
- Q(b);N_PINR(F),P_PINR(I)::R1(F)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A),XQ(b)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- Q(b);N_PINR(F),P_PINP(D),P_PINR(I),XQ(E)::R1(F)
- S(d);P_PINR(I),XR(F)::S(A)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- S(A)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- Q(b);N_PINR(F),P_PINR(I),XQ(E)::R1(F)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- S(d);P_PINR(I),XR(F)::QAR1(E)
- Q(b);N_PINR(F),P_PINR(I)::QAR1(E)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- DUALS(4)
- Vars
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A),XQ(b)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A),XQ(b)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- S(d);P_PINR(I),XR(F)::S(H)
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A),XQ(b)
- Q(b);N_PINR(F),P_PINP(D),P_PINR(I)::R1(F)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- DUALS(4)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- Q(b);N_PINR(F),P_PINR(I)::R1(F)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);
- Threat
- S(A)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- Q(b);N_PINR(F),P_PINR(I),XQ(E)::R1(F)
- Refutation
- Q(b);CHECK,P_PINR(I),XR(F)
- Try
- Q(E);N_SPINR(F),P_SPINR(I)
- Threat
- R1(F)
- Vars
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- Q(b);N_GUARD,N_PINR(I),P_PINR(F),XQ(E)::S(A)
- Q(b);N_GUARD::S(A),XQ(b)
- Q(b);N_GUARD::S(A)
- Refutation
- S(d);XR(F)
- Try
- Actual
- S(H);
- Threat
- QAR(E)+P(D)
- Vars
- Q(b);CHECK,OGATE,P_PINR(I),XR(F)::QAR(E)+P(D),XQ(b)
- B(e);CHECK,OGATE,P_SPINB(e),XR(I)::B(K),XB(e)
- S(d);OGATE,P_PINR(I),XR(F)::QAR(E)+P(D),XS(d)
- Q(b);N_GUARD::S(A)
- Q(b);N_GUARD,N_PINR(F),P_PINR(I)::S(A),XQ(b)
- Q(b);N_PINR(F),P_PINR(I)::R1(F)
- Q(b);N_PINR(F),P_PINP(D),P_PINR(I)::R1(F)
- B(e);OGATE::B(K)+R(I)
- B(e);OGATE::B(K)+R(I),XB(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).