MESON Chess Problem Database
Problem Display
PID: 60300 (5r2/Qn1Rp2B/4pp1N/4kq2/2K3R1/8/2n5/4N3 w - - 0 1)
Loyd, Sam
1st Prize, Centennial Ty., 1877
#2
7 + 8
| 5206 | Sam Loyd and His Chess Problems | 1913 |
SOLUTION
- SOUND
- Sets
- 1...Qd3+
- 2.Sxd3#
- 1...Qe4+
- 2.Rxe4#
- 1...Qg6
- 2.Sf3#
- 1...Qxh7
- 2.Sf3#
- 1...Qf2
- 2.Sd3#
- 2.Re4#
- 1...Qf3
- 2.Sxf3#
- 1...Qg5
- 2.Sd3#
- 2.Sf3#
- 2.Re4#
- 1...Qh5
- 2.Sd3#
- 2.Sf3#
- 2.Re4#
- 1...Rf7
- 2.Sxf7#
- 1...Ra8
- 2.Sf7#
- 1...Rb8
- 2.Sf7#
- 1...Rd8
- 2.Sf7#
- 1...Re8
- 2.Sf7#
- 1...Rg8
- 2.Sf7#
- 1...Rh8
- 2.Sf7#
- 1...Sa1
- 2.Qd4#
- 2.Qxa1#
- 1...Sxe1
- 2.Qd4#
- 2.Qa1#
- 1...Sb4
- 2.Qd4#
- 2.Qa1#
- 1...Sd4
- 2.Qxd4#
- 1...Sa5+
- 2.Qxa5#
- 1...Sc5
- 2.Qxc5#
- 2.Qc7#
- 1...Sd8
- 2.Qc5#
- 2.Qb8#
- 2.Qa5#
- 2.Qc7#
- 1...Qd3+
- Tries
- 1.Kc3?
- 1...Qd3+
- 2.Sxd3#
- 1...Qf3+
- 2.Sxf3#
- 1...Qxg4
- 2.Sd3#
- 1...Qxh7
- 2.Sf3#
- 1...Sxe1
- 2.Qd4#
- 1...Sd6
- 2.Qc5#
- 1...Qe4
- 2.Rxe4#
- 1...Qg6
- 2.Sf3#
- 1...Qf1
- 2.Re4#
- 1...Qf2
- 2.Sd3#
- 2.Re4#
- 1...Qf4
- 2.Sd3#
- 1...Qg5
- 2.Sd3#
- 2.Sf3#
- 2.Re4#
- 1...Qh5
- 2.Sd3#
- 2.Sf3#
- 2.Re4#
- 1...Rf7
- 2.Sxf7#
- 1...Ra8
- 2.Sf7#
- 1...Rb8
- 2.Sf7#
- 1...Rd8
- 2.Sf7#
- 1...Re8
- 2.Sf7#
- 1...Rg8
- 2.Sf7#
- 1...Rh8
- 2.Sf7#
- 1...Sa1
- 2.Qd4#
- 1...Sa3
- 2.Qd4#
- 1...Se3
- 2.Qd4#
- 1...Sb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa5
- 2.Qc5#
- 2.Qxa5#
- 2.Qc7#
- 1...Sc5
- 2.Qxc5#
- 2.Qc7#
- 1...Sd8
- 2.Qc5#
- 2.Qb8#
- 2.Qa5#
- 2.Qc7#
- 1...Rc8+!
- 1...Qd3+
- 1.Qe3+?
- 1...Qe4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Sxe3+!
- 1...Qe4+
- 1.Qb8+?
- 1...Rxb8
- 2.Sf7#
- 1...Sd6+!
- 1...Rxb8
- 1.Qa1+?
- 1...Sd4
- 2.Qxd4#
- 1...Sxa1!
- 1...Sd4
- 1.Qa5+?
- 1...Sc5
- 2.Qc7#
- 2.Qxc5#
- 1...Sxa5+!
- 1...Sc5
- 1.Kc3?
- Keys
- 1.Kb3!
- 1...Qd3+
- 2.Sxd3#
- 1...Qf3+
- 2.Sxf3#
- 1...Sa1+
- 2.Qxa1#
- 1...Sd4+
- 2.Qxd4#
- 1...Sa5+
- 2.Qxa5#
- 1...Sc5+
- 2.Qxc5#
- 1...Qxg4
- 2.Sd3#
- 1...Qxh7
- 2.Sf3#
- 1...Sxe1
- 2.Qd4#
- 2.Qa1#
- 1...Sd6
- 2.Qc5#
- 1...Qe4
- 2.Rxe4#
- 1...Qg6
- 2.Sf3#
- 1...Qf1
- 2.Re4#
- 1...Qf2
- 2.Sd3#
- 2.Re4#
- 1...Qf4
- 2.Sd3#
- 1...Qg5
- 2.Sd3#
- 2.Sf3#
- 2.Re4#
- 1...Qh5
- 2.Sd3#
- 2.Sf3#
- 2.Re4#
- 1...Rf7
- 2.Sxf7#
- 1...Ra8
- 2.Sf7#
- 1...Rb8
- 2.Sf7#
- 1...Rc8
- 2.Sf7#
- 1...Rd8
- 2.Sf7#
- 1...Re8
- 2.Sf7#
- 1...Rg8
- 2.Sf7#
- 1...Rh8
- 2.Sf7#
- 1...Sa3
- 2.Qd4#
- 1...Se3
- 2.Qd4#
- 2.Qa1#
- 1...Sb4
- 2.Qd4#
- 2.Qa1#
- 1...Sd8
- 2.Qc5#
- 2.Qb8#
- 2.Qa5#
- 2.Qc7#
- 1...Qd3+
- 1.Kb3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- Q(c);CHECK,N_GUARD::S(A),XQ(c)
- Q(c);CHECK,N_GUARD::R1(C),XQ(c)
- Q(c);N_GUARD::S(A)
- Q(c);N_GUARD,XB(G)::S(A)
- Q(c);N_GUARD::S(A),XQ(c)
- R(h);N_GUARD::S(D),XR(h)
- R(h);N_GUARD::S(D)
- S(a);N_GUARD::QAB1(E),XS(a)
- S(f);CHECK,N_GUARD::QAR(E),XS(f)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- Q(c);CHECK,N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,XR(C)::S(A)
- Q(c);N_GUARD,XB(G)::S(A)
- S(a);N_GUARD,XS(A)::QAB1(E)
- S(f);N_GUARD::QAR2(E)
- Q(c);N_GUARD::R1(C),XQ(c)
- Q(c);N_GUARD::S(A)
- Q(c);N_GUARD::R1(C)
- R(h);N_GUARD::S(D),XR(h)
- R(h);N_GUARD::S(D)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- Refutation
- R(h);CHECK
- Try
- Q(E);CHECK
- Refutation
- S(a);CHECK,XQ(E)
- Try
- Q(E);CHECK
- Vars
- R(h);XQ(E)::S(D)
- Refutation
- S(f);CHECK,P_SPINS(f)
- Try
- Q(E);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(E),XS(a)
- Refutation
- S(a);XQ(E)
- Try
- Q(E);CHECK
- Refutation
- S(f);CHECK,XQ(E)
- Try
- Actual
- K(B);S_FLIGHT
- Vars
- Q(c);CHECK,N_GUARD::S(A),XQ(c)
- S(a);CHECK,N_GUARD::QAB(E),XS(a)
- S(a);CHECK,N_GUARD::QAB1(E),XS(a)
- S(f);CHECK,N_GUARD::QAR(E),XS(f)
- S(f);CHECK,N_GUARD::QAR2(E),XS(f)
- Q(c);N_GUARD,XR(C)::S(A)
- Q(c);N_GUARD,XB(G)::S(A)
- S(f);N_GUARD::QAR2(E)
- Q(c);N_GUARD::R1(C),XQ(c)
- Q(c);N_GUARD::S(A)
- Q(c);N_GUARD::R1(C)
- R(h);N_GUARD::S(D),XR(h)
- R(h);N_GUARD::S(D)
- S(a);N_GUARD::QAB1(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).