MESON Chess Problem Database
Problem Display
PID: 51490 (3B1n2/N1P1PK2/1P1k1N1b/2qp2P1/1Pp2P2/4r3/1Q6/3r4 w - - 0 1)
Ravenscroft, Frank
The Guardian, 1962
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxb4
- 2.Qxb4#
- 1...Qd4
- 2.c8S#
- 1...Qxb6
- 2.c8S#
- 1...Qa5
- 2.c8S#
- 1...Qb5
- 2.c8S#
- 1...Qc6
- 2.Sc8#
- 1...Qxc7
- 2.Bxc7#
- 1...Ra3
- 2.Qe5#
- 2.e8S#
- 1...Rb3
- 2.Qe5#
- 2.e8S#
- 1...Rc3
- 2.e8S#
- 1...Rd3
- 2.Qe5#
- 2.e8S#
- 1...Rf3
- 2.Qe5#
- 2.e8S#
- 1...Rg3
- 2.Qe5#
- 2.e8S#
- 1...Rh3
- 2.Qe5#
- 2.e8S#
- 1...Re5
- 2.Qxe5#
- 2.fxe5#
- 1...Rxe7+
- 2.Bxe7#
- 1...Se6
- 2.e8S#
- 1...Sd7
- 2.Se8#
- 1...Qxb4
- Tries
- 1.Qd4?
- threat
- 2.Qxc5#
- 2.bxc5#
- 1...Rxe7+
- 2.Bxe7#
- 1...Qxb4
- 2.c8S#
- 1...Qxd4
- 2.c8S#
- 1...Qxb6
- 2.Qxb6#
- 2.c8S#
- 1...Qxc7
- 2.Bxc7#
- 1...Qa5
- 2.c8S#
- 1...Qb5
- 2.c8S#
- 1...Qc6
- 2.Sc8#
- 1...Se6
- 2.e8S#
- 1...Sd7
- 2.Se8#
- 1...Rxd4!
- threat
- 1.c8Q?
- threat
- 2.Se8#
- 2.Qxc5#
- 2.bxc5#
- 1...Rxe7+
- 2.Bxe7#
- 1...Qxb4
- 2.Se8#
- 2.Qxb4#
- 2.Qc6#
- 2.Qc7#
- 1...Qxb6
- 2.Se8#
- 1...Qd4
- 2.Se8#
- 2.Sb5#
- 2.Bc7#
- 2.Qc6#
- 2.Qc7#
- 2.Qb8#
- 1...Qa5
- 2.Se8#
- 2.Bc7#
- 2.Qc6#
- 2.Qc7#
- 2.Qb8#
- 1...Qb5
- 2.Sxb5#
- 2.Bc7#
- 2.Qc7#
- 2.Qb8#
- 1...Qc6
- 2.Qxc6#
- 1...Qc7
- 2.Se8#
- 2.Bxc7#
- 2.Qxc7#
- 1...Se6
- 2.Se8#
- 2.Qd7#
- 2.e8S#
- 1...Sd7
- 2.Se8#
- 2.Qxd7#
- 1...d4
- 2.Qxc5#
- 2.bxc5#
- 1...Qxc8!
- threat
- 1.exf8Q+?
- 1...Re7+
- 2.Bxe7#
- 2.Qxe7#
- 1...Bxf8!
- 1...Re7+
- 1.exf8B+?
- 1...Re7+
- 2.Bdxe7#
- 2.Bfxe7#
- 1...Bxf8!
- 1...Re7+
- 1.e8Q?
- threat
- 2.Sc8#
- 1...Qxc7+
- 2.Bxc7#
- 1...Re7+
- 2.Bxe7#
- 2.Qxe7#
- 1...Qxb4
- 2.Qc6#
- 2.Qxb4#
- 1...Sd7
- 2.Qxd7#
- 1...Rxe8!
- threat
- 1.Qd4?
- Keys
- 1.Qa3!
- threat
- 2.bxc5#
- 1...Rxe7+
- 2.Bxe7#
- 1...Qxb4
- 2.Qxb4#
- 1...Qxb6
- 2.c8S#
- 1...Qxc7
- 2.Bxc7#
- 1...Rxa3
- 2.e8S#
- 1...Qd4
- 2.c8S#
- 1...Qa5
- 2.c8S#
- 1...Qb5
- 2.c8S#
- 1...Qc6
- 2.Sc8#
- 1...Se6
- 2.e8S#
- 1...Sd7
- 2.Se8#
- threat
- 1.Qa3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- Q(d);OGATE,XP(B)::QAB(A),XQ(d)
- Q(d);N_GUARD::P=S
- Q(d);N_GUARD,XP(E)::P=S
- Q(d);SBLOCK::S(G)
- Q(d);OGATE,P_PINP(I),XP(H)::B(K),XQ(d)
- R(b);N_GUARD::P=S
- R(b);CHECK,OGATE,XP(I)::B(K),XR(b)
- S(h);S_CUTR(b)::P=S
- S(h);SBLOCK::S(F)
- Tries
- Try
- Q(A);P_PINP(e)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,OGATE,XP(I)::B(K),XR(b)
- Q(d);N_GUARD,XP(B)::P=S
- Q(d);N_GUARD,N_SPINP(e),XQ(A)::P=S
- Q(d);OGATE,P_PINP(I),XP(H)::B(K),XQ(d)
- Q(d);N_GUARD::P=S
- Q(d);SBLOCK::S(G)
- S(h);S_CUTR(b)::P=S
- S(h);SBLOCK::S(F)
- Refutation
- R(a);N_SPINP(e),XQ(A)
- Try
- P(H);
- Threat
- DUALS(3)
- Vars
- R(b);CHECK,OGATE,XP(I)::B(K),XR(b)
- Q(d);XP(E)::S(F)
- Q(d);N_GUARD::QAR1(H),XQ(d)
- Refutation
- Q(d);XQ(H)
- Try
- P(I);CHECK,XS(h)
- Refutation
- B(g);XQ(I)
- Try
- P(I);CHECK,XS(h)
- Refutation
- B(g);XB(I)
- Try
- P(I);
- Threat
- S(G)
- Vars
- Q(d);CHECK,OGATE,XP(H)::B(K),XQ(d)
- S(h);N_GUARD::QAR1(I),XS(h)
- Refutation
- R(b);XQ(I)
- Try
- Actual
- Q(A);
- Threat
- P(B),XQ(d)
- Vars
- R(b);CHECK,OGATE,XP(I)::B(K),XR(b)
- Q(d);OGATE,P_SPINQ(d),XP(B)::QAB(A),XQ(d)
- Q(d);N_GUARD,XP(E)::P=S
- Q(d);OGATE,P_PINP(I),XP(H)::B(K),XQ(d)
- R(b);N_GUARD,XQ(A)::P=S
- Q(d);N_GUARD::P=S
- Q(d);SBLOCK::S(G)
- S(h);S_CUTR(b)::P=S
- S(h);SBLOCK::S(F)
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).