MESON Chess Problem Database
Problem Display
PID: 20877 (8/Q7/8/5n2/5P2/3PqB2/p3R3/R3K1k1 w Q - 0 1)
Alvey, George Clarence Vincent
Chess Amateur (The), 1913
#2
7 + 4
| 5501 | Chess Cameos | 1936 |
| 81 | Chess | 1959 |
| 273 | Mat Plus | 1995 |
| 15148 | Sadier Collection | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Qf2+
- 2.Qxf2#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Qc5
- 2.Kd2#
- 1...Qb6
- 2.Kd2#
- 2.0-0-0#
- 1...Qxa7
- 2.Kd2#
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sd4
- 2.Qg7#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 2.Qg7#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 2.Qxg7#
- 1...Qf2+
- Tries
- 1.Be4?
- 1...Qf2+
- 2.Qxf2#
- 1...Qxa7
- 2.Kd2#
- 2.0-0-0#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Qc5
- 2.Kd2#
- 1...Qb6
- 2.Kd2#
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 1...Sd4!
- 1...Qf2+
- 1.Bd5?
- 1...Qf2+
- 2.Qxf2#
- 1...Qxa7
- 2.Kd2#
- 2.0-0-0#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Qc5
- 2.Kd2#
- 1...Qb6
- 2.Kd2#
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 1...Sd4!
- 1...Qf2+
- 1.Bc6?
- 1...Qf2+
- 2.Qxf2#
- 1...Qxa7
- 2.Kd2#
- 2.0-0-0#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Qc5
- 2.Kd2#
- 1...Qb6
- 2.Kd2#
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 1...Sd4!
- 1...Qf2+
- 1.Bb7?
- 1...Qf2+
- 2.Qxf2#
- 1...Qxa7
- 2.Kd2#
- 2.0-0-0#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Qc5
- 2.Kd2#
- 1...Qb6
- 2.Kd2#
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 1...Sd4!
- 1...Qf2+
- 1.Ba8?
- 1...Qf2+
- 2.Qxf2#
- 1...Qxa7
- 2.Kd2#
- 2.0-0-0#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Qc5
- 2.Kd2#
- 1...Qb6
- 2.Kd2#
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 1...Sd4!
- 1...Qf2+
- 1.Qd4?
- 1...Qf2+
- 2.Qxf2#
- 1...Qxd4
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 2.Qg7#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 2.Qxg7#
- 1...Sxd4!
- 1...Qf2+
- 1.Qc5?
- 1...Qf2+
- 2.Qxf2#
- 1...Sd4
- 2.Qg5#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 2.Qg5#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 2.Qg5#
- 1...Sg7
- 2.Qxe3#
- 2.Qg5#
- 1...Qxc5!
- 1...Qf2+
- 1.Qg7+?
- 1...Sg3
- 2.Qxg3#
- 1...Sxg7!
- 1...Sg3
- 1.Be4?
- Keys
- 1.Qb6!
- 1...Qf2+
- 2.Qxf2#
- 1...Qxb6
- 2.0-0-0#
- 1...Sd4
- 2.Qg6#
- 1...Qd4
- 2.Kd2#
- 2.0-0-0#
- 1...Qc5
- 2.Kd2#
- 1...Sg3
- 2.Qxe3#
- 1...Sh4
- 2.Qxe3#
- 1...Sd6
- 2.Qxe3#
- 1...Sh6
- 2.Qxe3#
- 1...Se7
- 2.Qxe3#
- 1...Sg7
- 2.Qxe3#
- 2.Qg6#
- 1...Qf2+
- 1.Qb6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C)::R(A)+K(B)
- S(d);N_GUARD::QAB(G),XQ(c)
- S(d);N_GUARD,N_SPINQ(c)::QAR(G)
- Tries
- Try
- B(E);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C)::R(A)+K(B)
- S(d);N_GUARD::QAB(G),XQ(c)
- Refutation
- S(d);N_SPINQ(c)
- Try
- B(E);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C)::R(A)+K(B)
- S(d);N_GUARD::QAB(G),XQ(c)
- Refutation
- S(d);N_SPINQ(c)
- Try
- B(E);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C)::R(A)+K(B)
- S(d);N_GUARD::QAB(G),XQ(c)
- Refutation
- S(d);N_SPINQ(c)
- Try
- B(E);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C)::R(A)+K(B)
- S(d);N_GUARD::QAB(G),XQ(c)
- Refutation
- S(d);N_SPINQ(c)
- Try
- B(E);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C)::R(A)+K(B)
- S(d);N_GUARD::QAB(G),XQ(c)
- Refutation
- S(d);N_SPINQ(c)
- Try
- Q(G);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C),N_SPINQ(c),XQ(G)::0-0-0
- S(d);N_GUARD::QAB(G),XQ(c)
- Refutation
- S(d);N_SPINQ(c),XQ(G)
- Try
- Q(G);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- S(d);N_SPINQ(c),OGATE::QAR(G)
- S(d);N_GUARD::QAB(G),XQ(c)
- Refutation
- Q(c);N_PINR(C),N_SPINQ(c),XQ(G)
- Try
- Q(G);CHECK,N_PINQ(c)
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAR2(G),XS(d)
- Refutation
- S(d);XQ(G)
- Try
- Actual
- Q(G);
- Vars
- Q(c);CHECK,N_PINR(C),OGATE::QAB1(G),XQ(c)
- Q(c);N_PINR(C),N_SPINQ(c),XQ(G)::0-0-0
- S(d);N_GUARD,N_SPINQ(c)::QAR(G)
- Q(c);N_PINR(C)::R(A)+K(B)
- S(d);N_GUARD::QAB(G),XQ(c)
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).