MESON Chess Problem Database
Problem Display
PID: 58593 (nq6/4B3/3R4/3B4/N7/k5K1/2Q5/8 w - - 0 1)
Haring, Jacobus
Het Belgisch Schaakbord (L'Echiquier Belge), 1955
#2
6 + 3
SOLUTION
- SOUND
- Sets
- 1...Qxd6+
- 2.Bxd6#
- 1...Qa7
- 2.Qb3#
- 1...Qc7
- 2.Qb3#
- 1...Qb3+
- 2.Qxb3#
- 1...Qb4
- 2.Qa2#
- 1...Qb6
- 2.Rxb6#
- 1...Qc8
- 2.Rc6#
- 2.Qb3#
- 1...Qd8
- 2.Rxd8#
- 2.Qb3#
- 1...Qe8
- 2.Qb3#
- 1...Qf8
- 2.Qb3#
- 1...Qg8+
- 2.Rg6#
- 1...Qh8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 2.Qb3#
- 1...Sb6
- 2.Qb3#
- 1...Sc7
- 2.Rb6#
- 1...Qxd6+
- Tries
- 1.Sb2?
- 1...Qxd6+
- 2.Bxd6#
- 1...Qb3+
- 2.Qxb3#
- 1...Qg8+
- 2.Rg6#
- 1...Qxb2
- 2.Ra6#
- 1...Qa7
- 2.Ra6#
- 2.Qb3#
- 2.Qc3#
- 1...Qc7
- 2.Qb3#
- 1...Qb4
- 2.Ra6#
- 1...Qb5
- 2.Ra6#
- 1...Qb6
- 2.Rxb6#
- 1...Qb7
- 2.Ra6#
- 1...Qc8
- 2.Ra6#
- 2.Rc6#
- 2.Qb3#
- 1...Qd8
- 2.Ra6#
- 2.Rxd8#
- 2.Qb3#
- 2.Qc3#
- 1...Qe8
- 2.Ra6#
- 2.Qb3#
- 2.Qc3#
- 1...Qf8
- 2.Ra6#
- 2.Qb3#
- 2.Qc3#
- 1...Qh8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 2.Qb3#
- 1...Sb6
- 2.Qb3#
- 2.Qc3#
- 1...Sc7
- 2.Ra6#
- 2.Rb6#
- 1...Kb4!
- 1...Qxd6+
- 1.Sc3?
- 1...Qxd6+
- 2.Bxd6#
- 1...Qg8+
- 2.Rg6#
- 1...Qb1
- 2.Ra6#
- 1...Qa7
- 2.Ra6#
- 2.Qb3#
- 1...Qc7
- 2.Qb3#
- 1...Qb2
- 2.Ra6#
- 2.Qa4#
- 1...Qb3
- 2.Ra6#
- 2.Qxb3#
- 1...Qb4
- 2.Ra6#
- 2.Qa2#
- 1...Qb5
- 2.Ra6#
- 1...Qb6
- 2.Rxb6#
- 1...Qb7
- 2.Ra6#
- 1...Qc8
- 2.Ra6#
- 2.Rc6#
- 2.Qb3#
- 1...Qd8
- 2.Ra6#
- 2.Rxd8#
- 2.Qb3#
- 1...Qe8
- 2.Ra6#
- 2.Qb3#
- 1...Qf8
- 2.Ra6#
- 2.Qb3#
- 1...Qh8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 2.Qb3#
- 1...Sb6
- 2.Qb3#
- 1...Sc7
- 2.Ra6#
- 2.Rb6#
- 1...Kb4!
- 1...Qxd6+
- 1.Sb6?
- threat
- 2.Qb3#
- 2.Qc3#
- 1...Qxd6+
- 2.Bxd6#
- 1...Qg8+
- 2.Rg6#
- 1...Qxb6
- 2.Rxb6#
- 1...Sxb6
- 2.Qb3#
- 1...Qc7
- 2.Qb3#
- 1...Qc8
- 2.Rc6#
- 2.Qb3#
- 1...Qh8
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 2.Qb3#
- 1...Kb4!
- threat
- 1.Bc4?
- 1...Qxd6+
- 2.Bxd6#
- 1...Qb3+
- 2.Qxb3#
- 1...Qg8+
- 2.Rg6#
- 1...Qb1
- 2.Rd3#
- 1...Qa7
- 2.Rd3#
- 2.Qb3#
- 1...Qc7
- 2.Qb3#
- 1...Qb2
- 2.Rd3#
- 1...Qb4
- 2.Rd3#
- 2.Qa2#
- 1...Qb5
- 2.Rd3#
- 1...Qb6
- 2.Rd3#
- 2.Rxb6#
- 1...Qb7
- 2.Rd3#
- 1...Qc8
- 2.Rd3#
- 2.Rc6#
- 2.Qb3#
- 1...Qd8
- 2.Rd3#
- 2.Rxd8#
- 2.Qb3#
- 1...Qe8
- 2.Rd3#
- 2.Qb3#
- 1...Qf8
- 2.Rd3#
- 2.Qb3#
- 1...Qh8
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 2.Qb3#
- 1...Sb6
- 2.Qb3#
- 1...Sc7
- 2.Rd3#
- 2.Rb6#
- 1...Kb4!
- 1...Qxd6+
- 1.Bf7?
- 1...Qxd6+
- 2.Bxd6#
- 1...Qb3+
- 2.Qxb3#
- 1...Qg8+
- 2.Rg6#
- 1...Qb1
- 2.Rd3#
- 1...Qa7
- 2.Rd3#
- 2.Qb3#
- 1...Qc7
- 2.Qb3#
- 1...Qb2
- 2.Rd3#
- 1...Qb4
- 2.Rd3#
- 2.Qa2#
- 1...Qb5
- 2.Rd3#
- 1...Qb6
- 2.Rd3#
- 2.Rxb6#
- 1...Qb7
- 2.Rd3#
- 1...Qc8
- 2.Rd3#
- 2.Rc6#
- 2.Qb3#
- 1...Qd8
- 2.Rd3#
- 2.Rxd8#
- 2.Qb3#
- 1...Qe8
- 2.Rd3#
- 2.Qb3#
- 1...Qf8
- 2.Rd3#
- 2.Qb3#
- 1...Qh8
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 2.Qb3#
- 1...Sb6
- 2.Qb3#
- 1...Sc7
- 2.Rd3#
- 2.Rb6#
- 1...Kb4!
- 1...Qxd6+
- 1.Bg8?
- 1...Qxd6+
- 2.Bxd6#
- 1...Qb3+
- 2.Qxb3#
- 1...Qxg8+
- 2.Rg6#
- 1...Qb1
- 2.Rd3#
- 1...Qa7
- 2.Rd3#
- 2.Qb3#
- 1...Qc7
- 2.Qb3#
- 1...Qb2
- 2.Rd3#
- 1...Qb4
- 2.Rd3#
- 2.Qa2#
- 1...Qb5
- 2.Rd3#
- 1...Qb6
- 2.Rd3#
- 2.Rxb6#
- 1...Qb7
- 2.Rd3#
- 1...Qc8
- 2.Rd3#
- 2.Rc6#
- 2.Qb3#
- 1...Qd8
- 2.Rd3#
- 2.Rxd8#
- 2.Qb3#
- 1...Qe8
- 2.Rd3#
- 2.Qb3#
- 1...Qf8
- 2.Rd3#
- 2.Qb3#
- 1...Sb6
- 2.Qb3#
- 1...Sc7
- 2.Rd3#
- 2.Rb6#
- 1...Kb4!
- 1...Qxd6+
- 1.Qc3+?
- 1...Qb3
- 2.Qxb3#
- 1...Kxa4!
- 1...Qb3
- 1.Sb2?
- Keys
- 1.Bc6!
- 1...Qxd6+
- 2.Bxd6#
- 1...Qb3+
- 2.Rd3#
- 1...Qg8+
- 2.Rg6#
- 1...Kb4
- 2.Qc3#
- 1...Qb2
- 2.Qxb2#
- 1...Qb1
- 2.Rd3#
- 1...Qa7
- 2.Rd3#
- 2.Qb2#
- 1...Qc7
- 2.Qb2#
- 1...Qb4
- 2.Rd3#
- 1...Qb5
- 2.Rd3#
- 1...Qb6
- 2.Rd3#
- 1...Qb7
- 2.Rd3#
- 1...Qc8
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 2.Qb2#
- 1...Qd8
- 2.Rd3#
- 2.Rxd8#
- 2.Qb2#
- 1...Qe8
- 2.Rd3#
- 2.Qb2#
- 1...Qf8
- 2.Rd3#
- 2.Qb2#
- 1...Qh8
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 2.Rd5#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Rd7#
- 2.Rd8#
- 1...Sb6
- 2.Qb2#
- 1...Sc7
- 2.Rd3#
- 1...Qxd6+
- 1.Bc6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 6
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);N_GUARD,N_PINR(E)::QAR1(A)
- Q(c);N_GUARD::QAR1(A)
- Q(c);CHECK,N_GUARD,N_PINR(E)::QAR1(A),XQ(c)
- Q(c);N_PINR(E),SBLOCK::QAR1(A)
- Q(c);N_PINR(E)::B(F)+R(E),XQ(c)
- Q(c);CHECK,N_PINR(E)::B(F)+R(E)
- S(b);S_CUTQ(c)::QAR1(A)
- S(b);N_PINR(E)::B(F)+R(E)
- Tries
- Try
- S(C);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);CHECK,N_GUARD,N_PINR(E)::QAR1(A),XQ(c)
- Q(c);CHECK,N_PINR(E)::B(F)+R(E)
- Q(c);N_PINR(E),XS(C)::B(F)+R(E),DCHECK
- Q(c);N_GUARD::QAR1(A)
- Q(c);N_PINR(E)::R(E)
- Q(c);N_PINR(E)::B(F)+R(E),DCHECK
- Q(c);N_PINR(E)::B(F)+R(E),XQ(c)
- Refutation
- K(a);S_FLIGHT
- Try
- S(C);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);CHECK,N_PINR(E)::B(F)+R(E)
- Q(c);N_PINR(E)::B(F)+R(E),DCHECK
- Q(c);N_GUARD::QAR1(A)
- Q(c);N_PINR(E)::B(F)+R(E),XQ(c)
- S(b);S_CUTQ(c)::QAR1(A)
- Refutation
- K(a);S_FLIGHT
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);CHECK,N_PINR(E)::B(F)+R(E)
- Q(c);N_PINR(E),XS(C)::B(F)+R(E),XQ(c)
- S(b);XS(C)::QAR1(A)
- Q(c);::QAR1(A)
- Refutation
- K(a);S_FLIGHT
- Try
- B(D);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);CHECK,N_GUARD,N_PINR(E)::QAR1(A),XQ(c)
- Q(c);CHECK,N_PINR(E)::B(F)+R(E)
- Q(c);N_PINR(E)::B(F)+R(E),DCHECK
- Q(c);N_GUARD::QAR1(A)
- S(b);S_CUTQ(c)::QAR1(A)
- Refutation
- K(a);S_FLIGHT
- Try
- B(D);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);CHECK,N_GUARD,N_PINR(E)::QAR1(A),XQ(c)
- Q(c);CHECK,N_PINR(E)::B(F)+R(E)
- Q(c);N_PINR(E)::B(F)+R(E),DCHECK
- Q(c);N_GUARD::QAR1(A)
- S(b);S_CUTQ(c)::QAR1(A)
- Refutation
- K(a);S_FLIGHT
- Try
- B(D);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);CHECK,N_GUARD,N_PINR(E)::QAR1(A),XQ(c)
- Q(c);CHECK,N_PINR(E),XB(D)::B(F)+R(E)
- Q(c);N_PINR(E)::B(F)+R(E),DCHECK
- Q(c);N_GUARD::QAR1(A)
- S(b);S_CUTQ(c)::QAR1(A)
- Refutation
- K(a);S_FLIGHT
- Try
- Q(A);CHECK
- Vars
- Q(c);N_GUARD,N_PINR(E),P_PINQ(A),P_SPINQ(c)::QAR1(A),XQ(c)
- Refutation
- K(a);P-FLIGHT,XS(C)
- Try
- Actual
- B(D);
- Vars
- Q(c);CHECK,OGATE,P_SPINQ(c),XR(E)::B(F),XQ(c)
- Q(c);CHECK,N_PINR(E)::B(F)+R(E)
- K(a);S_FLIGHT::QAB1(A)
- Q(c);N_GUARD,N_PINR(E)::QAB1(A),XQ(c)
- Q(c);N_PINR(E)::B(F)+R(E),DCHECK
- Q(c);N_GUARD::QAB1(A)
- Q(c);N_PINR(E)::R(E)
- S(b);S_CUTQ(c)::QAB1(A)
- S(b);N_PINR(E)::B(F)+R(E),DCHECK
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).