MESON Chess Problem Database
Problem Display
PID: 46954 (n2KQb2/1p1B2R1/1p1k1r2/p4R2/N5p1/1p5p/5P1q/3r4 w - - 0 1)
Loyd, Sam
Detroit Free Press, 1885
#2
7 + 12
| 5206 | Sam Loyd and His Chess Problems | 1913 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...Qh1
- 2.Qe5#
- 1...Qxf2
- 2.Qe5#
- 1...Qg2
- 2.Qe5#
- 1...Rd5
- 2.Rxf6#
- 1...Rxf5
- 2.Qe6#
- 1...Re6
- 2.Qxe6#
- 1...Rg6
- 2.Rxg6#
- 2.Qxg6#
- 2.Qxf8#
- 1...Rh6
- 2.Qxf8#
- 1...Rf7
- 2.Qe6#
- 1...Be7+
- 2.Qxe7#
- 1...Bxg7
- 2.Qe7#
- 1...g3
- 2.Qe5#
- 1...Qg1
- Tries
- 1.Sc3?
- threat
- 2.Se4#
- 2.Sb5#
- 1...Be7+
- 2.Qxe7#
- 1...Qe5
- 2.Qxe5#
- 1...Rd5
- 2.Se4#
- 2.Rxd5#
- 1...Qf4
- 2.Sb5#
- 1...Qh1
- 2.Sb5#
- 2.Qe5#
- 1...Qg2
- 2.Sb5#
- 2.Qe5#
- 1...Re1
- 2.Sb5#
- 2.Rd5#
- 1...Rd4
- 2.Sb5#
- 1...Re6
- 2.Sb5#
- 2.Qxe6#
- 1...Sc7
- 2.Se4#
- 1...b5
- 2.Se4#
- 2.Sxb5#
- 1...Rxf5!
- threat
- 1.Bb5?
- threat
- 2.Rd7#
- 2.Qd7#
- 1...Be7+
- 2.Qxe7#
- 1...Rxf5
- 2.Rd7#
- 1...Bxg7
- 2.Qd7#
- 2.Qe7#
- 1...Rf7!
- threat
- 1.Bc8?
- threat
- 2.Qd7#
- 1...Rxf5
- 2.Qe6#
- 1...Rf7
- 2.Qe6#
- 1...Be7+!
- threat
- 1.Rg6?
- threat
- 2.Rgxf6#
- 2.Qxf8#
- 1...Be7+
- 2.Qxe7#
- 1...Rxg6
- 2.Qxg6#
- 2.Qxf8#
- 1...Qe5
- 2.Qxe5#
- 1...Re6
- 2.Rxe6#
- 2.Qxe6#
- 2.Qxf8#
- 1...Bh6
- 2.Rgxf6#
- 2.Qe7#
- 1...Bg7
- 2.Qe7#
- 1...Sc7
- 2.Qxf8#
- 1...Re1!
- threat
- 1.Rf7?
- threat
- 2.R7xf6#
- 2.Qxf8#
- 1...Be7+
- 2.Qxe7#
- 1...Rxf5
- 2.Qe6#
- 1...Rxf7
- 2.Qe6#
- 1...Qe5
- 2.Qxe5#
- 1...Re6
- 2.Qxe6#
- 1...Rg6
- 2.Qxf8#
- 1...Rh6
- 2.Qxf8#
- 1...Bh6
- 2.R7xf6#
- 2.Qe7#
- 1...Bg7
- 2.Qe7#
- 1...Sc7
- 2.Qxf8#
- 1...Re1!
- threat
- 1.Sc3?
- Keys
- 1.Qe3!
- 1...Be7+
- 2.Qxe7#
- 1...Qxf2
- 2.Qe5#
- 1...Rxf5
- 2.Qe6#
- 1...Bxg7
- 2.Qe7#
- 1...Qe5
- 2.Qxe5#
- 1...Qg3
- 2.Qxg3#
- 1...Qg1
- 2.Qf4#
- 2.Qe5#
- 1...Qf4
- 2.Qxf4#
- 1...Qh1
- 2.Qf4#
- 2.Qg3#
- 2.Qe5#
- 1...Qg2
- 2.Qf4#
- 2.Qe5#
- 1...Ra1
- 2.Qd2#
- 2.Qd4#
- 2.Qd3#
- 1...Rb1
- 2.Qd2#
- 2.Qd4#
- 2.Qd3#
- 1...Rc1
- 2.Qd2#
- 2.Qd4#
- 2.Qd3#
- 1...Re1
- 2.Qd2#
- 2.Qd4#
- 2.Qd3#
- 1...Rf1
- 2.Qd2#
- 2.Qd4#
- 2.Qd3#
- 1...Rg1
- 2.Qd2#
- 2.Qd4#
- 2.Qd3#
- 1...Rh1
- 2.Qd2#
- 2.Qd4#
- 2.Qd3#
- 1...Rd2
- 2.Qxd2#
- 1...Rd3
- 2.Qxd3#
- 1...Rd4
- 2.Qxd4#
- 1...Rd5
- 2.Rxf6#
- 1...Re6
- 2.Qxe6#
- 1...Rg6
- 2.Rxg6#
- 1...Rh6
- 2.Qxh6#
- 1...Rf7
- 2.Qe6#
- 1...Sc7
- 2.Qxb6#
- 1...b2
- 2.Qa3#
- 1...g3
- 2.Qf4#
- 2.Qe5#
- 1...b5
- 2.Qc5#
- 1...Be7+
- 1.Qe3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 9
- REMOVED MATES = 4
- Sets
- Q(b);N_GUARD::QAB1(G)
- Q(b);N_GUARD::QAB1(G),XQ(b)
- Q(b);N_GUARD,XP(A)::QAB1(G)
- R(a);SBLOCK::R(C),XR(i)
- R(i);N_GUARD,XR(C)::QAR1(G)
- R(i);N_GUARD::QAR1(G),XR(i)
- R(i);N_GUARD::QAB(G),XB(l)
- R(i);N_GUARD::QAR1(G)
- B(l);CHECK,N_GUARD::QAB1(G),XB(l)
- B(l);N_GUARD,XR(E)::QAB1(G)
- P(e);S_CUTQ(b)::QAB1(G)
- Tries
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::QAB1(G),XB(l)
- Q(b);N_GUARD::QAB1(G),XQ(b)
- Q(b);::S(B)
- R(a);::S(B)
- S(k);::S(B)
- Refutation
- R(i);XR(C)
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::QAB1(G),XB(l)
- R(i);XR(C)::R1(E)
- Refutation
- R(i);
- Try
- B(D);
- Threat
- QAR1(G)
- Vars
- R(i);N_GUARD,XR(C)::QAR1(G)
- R(i);N_GUARD::QAR1(G)
- Refutation
- B(l);CHECK
- Try
- R(E);P_PINR(i)
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::QAB1(G),XB(l)
- Q(b);N_GUARD::QAB1(G),XQ(b)
- B(l);N_GUARD::QAB1(G)
- S(k);::QAB(G),XB(l)
- Refutation
- R(a);
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::QAB1(G),XB(l)
- R(i);N_GUARD,XR(C)::QAR1(G)
- R(i);N_GUARD,XR(E)::QAR1(G)
- Q(b);N_GUARD::QAB1(G),XQ(b)
- R(i);N_GUARD::QAR1(G),XR(i)
- R(i);::QAB(G),XB(l)
- B(l);N_GUARD::QAB1(G)
- S(k);::QAB(G),XB(l)
- Refutation
- R(a);
- Try
- Actual
- Q(G);
- Vars
- B(l);CHECK,N_GUARD::QAB1(G),XB(l)
- Q(b);N_GUARD,XP(A)::QAB1(G)
- R(i);N_GUARD,XR(C)::QAR1(G)
- B(l);N_GUARD,XR(E)::QAB1(G)
- Q(b);N_GUARD::QAB1(G),XQ(b)
- Q(b);N_GUARD::QAB(G),XQ(b)
- R(a);N_GUARD::QAR(G),XR(a)
- R(a);N_GUARD::QAR2(G),XR(a)
- R(a);SBLOCK::R(C),XR(i)
- R(i);N_GUARD::QAR1(G),XR(i)
- R(i);OGATEB::R(E),XR(i)
- R(i);OGATEB::QAR(G),XR(i)
- R(i);N_GUARD::QAR1(G)
- S(k);N_GUARD::QAR2(G),XP(g)
- P(c);OGATE::QAB(G)
- P(g);N_GUARD::QAB1(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).