MESON Chess Problem Database
Problem Display
PID: 50050 (4RR2/2Np4/1K1p4/2P3p1/P1pk1p1n/7Q/1P6/2r1N3 w - - 0 1)
Rice, John Michael
British Chess Magazine, 1987
#2
9 + 8
| 5174 | Chess Problem Spectrum | 2003 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sc2#
- 2.Qc3#
- 1...Rb1
- 2.Sc2#
- 2.Qc3#
- 1...Rd1
- 2.Sc2#
- 2.Qc3#
- 1...Rxe1
- 2.Qc3#
- 1...Rc2
- 2.Sxc2#
- 1...Rc3
- 2.Qxc3#
- 2.bxc3#
- 1...Sg2
- 2.Qh8#
- 1...c3
- 2.Qd3#
- 1...f3
- 2.Qg4#
- 1...g4
- 2.Rxf4#
- 1...dxc5
- 2.Qxd7#
- 1...d5
- 2.Sb5#
- 1...Ra1
- Tries
- 1.Rf5?
- threat
- 2.Sb5#
- 2.Rd5#
- 1...c3
- 2.Qd3#
- 1...d5
- 2.Sb5#
- 2.Rxd5#
- 1...Sxf5!
- threat
- 1.Rf6?
- threat
- 2.Rxd6#
- 1...dxc5
- 2.Rd6#
- 2.Qxd7#
- 1...c3
- 2.Qd3#
- 1...d5
- 2.Sb5#
- 1...Sf5!
- threat
- 1.Qg2?
- threat
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 2.Qg1#
- 2.Qd2#
- 2.Qf2#
- 1...Rxe1
- 2.Qd5#
- 2.Qd2#
- 1...c3
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...Sf5
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 2.Qd2#
- 1...Rd1
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 2.Qg1#
- 2.Qf2#
- 1...Rc2
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...Rc3
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...Sf3
- 2.Qf2#
- 1...f3
- 2.Qd2#
- 2.Qf2#
- 2.Qg4#
- 1...d5
- 2.Sb5#
- 2.Qxd5#
- 2.Qg1#
- 2.Qd2#
- 2.Qf2#
- 1...Sxg2!
- threat
- 1.Qf5?
- threat
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 2.Qf6#
- 1...Rxe1
- 2.Sb5#
- 2.Qd5#
- 1...c3
- 2.Re4#
- 2.Qd3#
- 2.Qe4#
- 2.Qd5#
- 1...Sf3
- 2.Sxf3#
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...Sg6
- 2.Sf3#
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...d5
- 2.Sb5#
- 2.Qxd5#
- 2.Qe5#
- 2.Qf6#
- 1...Sxf5!
- threat
- 1.Qe6?
- threat
- 2.Sb5#
- 2.Qd5#
- 2.Qe4#
- 2.Qxd6#
- 2.Qf6#
- 1...Rxe1
- 2.Qd5#
- 2.Qxd6#
- 1...dxc5
- 2.Sb5#
- 2.Qd5#
- 2.Qxd7#
- 2.Qe4#
- 2.Qe5#
- 2.Qd6#
- 2.Qf6#
- 1...Sf5
- 2.Sb5#
- 2.Qd5#
- 2.Qe4#
- 2.Qf6#
- 1...Sf3
- 2.Sb5#
- 2.Qd5#
- 2.Qe4#
- 2.Qxd6#
- 1...Sg6
- 2.Sb5#
- 2.Qd5#
- 2.Qe4#
- 2.Qxd6#
- 1...c3
- 2.Sb5#
- 2.Qd5#
- 2.Qe4#
- 1...d5
- 2.Sb5#
- 2.Qxd5#
- 2.Qe5#
- 2.Qf6#
- 1...dxe6!
- threat
- 1.Qf3?
- threat
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 2.Qf2#
- 1...Rxe1
- 2.Sb5#
- 2.Qd5#
- 2.Qc3#
- 1...c3
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 2.Qd3#
- 1...Sf5
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...Rc2
- 2.Sxc2#
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...Rc3
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 2.Qxc3#
- 2.bxc3#
- 1...Sg2
- 2.Sb5#
- 2.Re4#
- 2.Qe4#
- 2.Qd5#
- 1...d5
- 2.Sb5#
- 2.Qxd5#
- 2.Qf2#
- 1...Sxf3!
- threat
- 1.Rf5?
- Keys
- 1.Qa3!
- 1...Rxe1
- 2.Qc3#
- 1...dxc5
- 2.Qxc5#
- 1...c3
- 2.Qb4#
- 1...Sf5
- 2.Sf3#
- 1...Ra1
- 2.Sc2#
- 2.Qc3#
- 1...Rb1
- 2.Sc2#
- 2.Qc3#
- 1...Rd1
- 2.Sc2#
- 2.Qc3#
- 1...Rc2
- 2.Sxc2#
- 1...Rc3
- 2.Qxc3#
- 2.bxc3#
- 1...Sg2
- 2.Sf3#
- 1...Sf3
- 2.Sxf3#
- 1...Sg6
- 2.Sf3#
- 1...f3
- 2.Qe3#
- 1...g4
- 2.Rxf4#
- 1...d5
- 2.Sb5#
- 1...Rxe1
- 1.Qa3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD,XS(A)::QAB1(C)
- R(a);N_GUARD::S(A),XR(a)
- S(e);OGATE::QAB(C)
- P(b);N_GUARD::QAR1(C)
- P(d);OGATEB::QAR(C)
- P(f);N_GUARD::R(I),XP(d)
- P(g);OGATEB,XP(E)::QAR(C),XP(h)
- P(g);SBLOCK::S(G)
- Tries
- Try
- R(I);
- Threat
- DUALS(2)
- Vars
- P(b);N_GUARD::QAR1(C)
- Refutation
- S(e);XR(I)
- Try
- R(I);
- Threat
- R(I),XP(g)
- Vars
- P(b);N_GUARD::QAR1(C)
- P(g);SBLOCK::S(G)
- Refutation
- S(e);
- Try
- Q(C);
- Threat
- DUALS(7)
- Vars
- S(e);::QAB(C)
- Refutation
- S(e);XQ(C)
- Try
- Q(C);
- Threat
- DUALS(5)
- Refutation
- S(e);XQ(C)
- Try
- Q(C);
- Threat
- DUALS(5)
- Refutation
- P(h);XQ(C)
- Try
- Q(C);
- Threat
- DUALS(5)
- Refutation
- S(e);XQ(C)
- Try
- Actual
- Q(C);
- Vars
- R(a);N_GUARD,XS(A)::QAB1(C)
- P(g);OGATE,XP(E)::QAB1(C),XP(g)
- P(b);OGATEB::QAR2(C)
- S(e);N_GUARD::S(A)
- R(a);N_GUARD::S(A),XR(a)
- S(e);N_GUARD::S(A),XS(e)
- P(d);N_GUARD::QAB1(C)
- P(f);N_GUARD::R(I),XP(d)
- P(g);SBLOCK::S(G)
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).