MESON Chess Problem Database
Problem Display
PID: 2954 (2Q5/p4p2/2P1qp2/R1K2kpP/3R1P2/1pp4P/n1r2N2/1B6 w - - 0 1)
Williams, Philip Hamilton
Source?, 1913
#2
10 + 10
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Qd7
- 2.Qxd7#
- 1...Qxc8
- 2.Kd6#
- 1...Sc1
- 2.Kb4#
- 1...Sb4
- 2.Kxb4#
- 1...b2
- 2.Bxc2#
- 1...gxf4
- 2.Rd5#
- 1...g4
- 2.hxg4#
- 1...a6
- 2.Kb6#
- 1...Qd7
- Tries
- 1.Kb5?
- threat
- 2.Ka4#
- 2.Ka6#
- 1...a6+
- 2.Ka4#
- 2.Kxa6#
- 2.Kb6#
- 1...Qd7
- 2.Qxd7#
- 1...Sb4
- 2.Kxb4#
- 1...Qxc8!
- threat
- 1.Sd1?
- threat
- 2.Se3#
- 1...Qxc8
- 2.Kd6#
- 1...Qd7
- 2.Qxd7#
- 1...gxf4!
- threat
- 1.Sh1?
- threat
- 2.Sg3#
- 1...Qxc8
- 2.Kd6#
- 1...Qd7
- 2.Qxd7#
- 1...gxf4!
- threat
- 1.Sg4?
- threat
- 2.Se3#
- 2.Sh6#
- 1...Qxc8
- 2.Kd6#
- 1...Qd7
- 2.Qxd7#
- 1...gxf4!
- threat
- 1.Re4?
- threat
- 2.Kd4#
- 1...Qd7
- 2.Kc4#
- 2.Qxd7#
- 1...Sb4
- 2.Kxb4#
- 1...Rd2!
- threat
- 1.Rb5?
- 1...Qxc8
- 2.Kd6#
- 1...gxf4
- 2.Rd5#
- 1...Qd7
- 2.Qxd7#
- 1...Sc1
- 2.Kb4#
- 1...Sb4
- 2.Kxb4#
- 1...b2
- 2.Bxc2#
- 1...g4
- 2.hxg4#
- 1...a5
- 2.Kb6#
- 1...a6!
- 1...Qxc8
- 1.Qd7?
- 1...gxf4
- 2.Rd5#
- 1...Sc1
- 2.Kb4#
- 1...Sb4
- 2.Kxb4#
- 1...b2
- 2.Bxc2#
- 1...g4
- 2.hxg4#
- 1...a6
- 2.Kb6#
- 1...Qxd7!
- 1...gxf4
- 1.c7?
- 1...Qxc8
- 2.Kd6#
- 1...gxf4
- 2.Rd5#
- 1...Qd7
- 2.Qxd7#
- 1...Sc1
- 2.Kb4#
- 1...Sb4
- 2.Kxb4#
- 1...b2
- 2.Bxc2#
- 1...g4
- 2.hxg4#
- 1...a6!
- 1...Qxc8
- 1.Kb5?
- Keys
- 1.Rc4!
- 1...Qxc8
- 2.Kd6#
- 1...gxf4
- 2.Kd4#
- 1...Qd7
- 2.Qxd7#
- 1...Sc1
- 2.Kb4#
- 1...Sb4
- 2.Kxb4#
- 1...b2
- 2.Bxc2#
- 1...g4
- 2.hxg4#
- 1...a6
- 2.Kb6#
- 1...Qxc8
- 1.Rc4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(g);OGATEB::QAB(J),XQ(g)
- Q(g);N_SPINQ(g),P_PINP(I),XQ(J)::R(F)+K(G)
- S(a);::R(F)+K(G)
- S(a);::R(F)+K(G),XS(a)
- P(c);N_GUARD::B(A),XR(b)
- P(f);SBLOCK,XP(E)::R(D)
- P(f);OGATE::P(C),XP(f)
- P(i);::R(F)+K(G)
- Tries
- Try
- K(G);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- Q(g);OGATEB,P_PINP(I)::QAB(J),XQ(g)
- S(a);::R(F)+K(G),XS(a)
- Refutation
- Q(g);N_SPINQ(g),XQ(J)
- Try
- S(B);
- Threat
- S(B)
- Vars
- Q(g);N_SPINQ(g),P_PINP(I),XQ(J)::R(F)+K(G)
- Q(g);OGATEB::QAB(J),XQ(g)
- Refutation
- P(f);XP(E)
- Try
- S(B);
- Threat
- S(B)
- Vars
- Q(g);N_SPINQ(g),P_PINP(I),XQ(J)::R(F)+K(G)
- Q(g);OGATEB::QAB(J),XQ(g)
- Refutation
- P(f);XP(E)
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- Q(g);N_SPINQ(g),P_PINP(I),XQ(J)::R(F)+K(G)
- Q(g);OGATEB::QAB(J),XQ(g)
- Refutation
- P(f);XP(E)
- Try
- R(D);N_PINR(b)
- Threat
- R(F)+K(G)
- Vars
- S(a);::R(F)+K(G),XS(a)
- Refutation
- R(b);
- Try
- R(F);
- Vars
- Q(g);N_SPINQ(g),P_PINP(I),XQ(J)::R(F)+K(G)
- P(f);SBLOCK,XP(E)::R(D)
- Q(g);OGATEB::QAB(J),XQ(g)
- S(a);::R(F)+K(G)
- S(a);::R(F)+K(G),XS(a)
- P(c);N_GUARD::B(A),XR(b)
- P(f);OGATE::P(C),XP(f)
- P(i);::R(F)+K(G)
- Refutation
- P(i);
- Try
- Q(J);
- Vars
- P(f);SBLOCK,XP(E)::R(D)
- S(a);::R(F)+K(G)
- S(a);::R(F)+K(G),XS(a)
- P(c);N_GUARD::B(A),XR(b)
- P(f);OGATE::P(C),XP(f)
- P(i);::R(F)+K(G)
- Refutation
- Q(g);N_SPINQ(g),XQ(J)
- Try
- P(I);
- Vars
- Q(g);N_SPINQ(g),P_PINP(I),XQ(J)::R(F)+K(G)
- P(f);SBLOCK,XP(E)::R(D)
- Q(g);OGATEB::QAB(J),XQ(g)
- S(a);::R(F)+K(G)
- S(a);::R(F)+K(G),XS(a)
- P(c);N_GUARD::B(A),XR(b)
- P(f);OGATE::P(C),XP(f)
- Refutation
- P(i);
- Try
- Actual
- R(D);
- Vars
- Q(g);N_SPINQ(g),P_PINP(I),XQ(J)::R(F)+K(G)
- P(f);SBLOCK,XP(E)::R(F)+K(G)
- Q(g);OGATEB::QAB(J),XQ(g)
- S(a);::R(F)+K(G)
- S(a);::R(F)+K(G),XS(a)
- P(c);N_GUARD::B(A),XR(b)
- P(f);OGATE::P(C),XP(f)
- P(i);::R(F)+K(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).