MESON Chess Problem Database
Problem Display
PID: 2971 (8/8/N7/1pN2p2/1R5p/p1k3qQ/1np1K3/B6R w - - 0 1)
Williams, Philip Hamilton
Chess Amateur (The), 1914
#2
7 + 8
| 2681 | All Change Here! | 1919 |
| 56 | The Problemist | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...Qxh3
- 2.Rxh3#
- 1...c1Q
- 2.Rxc1#
- 1...c1S+
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...a2
- 2.Bxb2#
- 1...f4
- 2.Se4#
- 1...Qd3+
- Tries
- 1.Sb3?
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...Qxh3
- 2.Rxh3#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...f4
- 2.Qc8#
- 1...a2!
- 1...Qd3+
- 1.Se6?
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...Qxh3
- 2.Rxh3#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...a2
- 2.Bxb2#
- 1...f4!
- 1...Qd3+
- 1.Sd7?
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...Qxh3
- 2.Rxh3#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...a2
- 2.Bxb2#
- 1...f4!
- 1...Qd3+
- 1.Rc1?
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...f4
- 2.Se4#
- 1...a2
- 2.Bxb2#
- 1...Qxh3!
- 1...Qd3+
- 1.Re1?
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...f4
- 2.Se4#
- 1...a2
- 2.Bxb2#
- 1...Qxh3!
- 1...Qd3+
- 1.Rf1?
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Rxf3#
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...f4
- 2.Se4#
- 1...a2
- 2.Bxb2#
- 1...Qxh3!
- 1...Qd3+
- 1.Rg1?
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...f4
- 2.Se4#
- 1...a2
- 2.Bxb2#
- 1...Qxh3!
- 1...Qd3+
- 1.Rxh4?
- threat
- 2.Qxg3#
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...Qxh3
- 2.R1xh3#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...f4!
- threat
- 1.Sb3?
- Keys
- 1.Sb7!
- 1...Qd3+
- 2.Qxd3#
- 1...Qe3+
- 2.Qxe3#
- 1...Qf3+
- 2.Qxf3#
- 1...c1S+
- 2.Rxc1#
- 1...Qxh3
- 2.Rxh3#
- 1...c1Q
- 2.Rxc1#
- 1...c1B
- 2.Rxc1#
- 1...c1R
- 2.Rxc1#
- 1...a2
- 2.Bxb2#
- 1...f4
- 2.Qc8#
- 1...Qd3+
- 1.Sb7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XQ(D)::R(B),XQ(e)
- P(b);OGATEB::R(B),XQ(b)
- P(b);CHECK,OGATEB::R(B),XS(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(c);N_GUARD::B(A),XS(a)
- P(h);N_GUARD::S(F)
- Tries
- Try
- S(F);
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- Q(e);N_SPINQ(e),OGATE,XQ(D)::R(B),XQ(e)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(h);OGATE::QAR(D)
- Refutation
- P(c);
- Try
- S(F);
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- Q(e);N_SPINQ(e),OGATE,XQ(D)::R(B),XQ(e)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(c);N_GUARD::B(A),XS(a)
- Refutation
- P(h);
- Try
- S(F);
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- Q(e);N_SPINQ(e),OGATE,XQ(D)::R(B),XQ(e)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(c);N_GUARD::B(A),XS(a)
- Refutation
- P(h);
- Try
- R(B);P_PINP(b)
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(h);N_GUARD::S(F)
- P(c);N_GUARD::B(A),XS(a)
- Refutation
- Q(e);N_SPINQ(e),XQ(D)
- Try
- R(B);
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(h);N_GUARD::S(F)
- P(c);N_GUARD::B(A),XS(a)
- Refutation
- Q(e);N_SPINQ(e),XQ(D)
- Try
- R(B);
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(h);N_GUARD::S(F)
- P(c);N_GUARD::B(A),XS(a)
- Refutation
- Q(e);N_SPINQ(e),XQ(D)
- Try
- R(B);
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(h);N_GUARD::S(F)
- P(c);N_GUARD::B(A),XS(a)
- Refutation
- Q(e);N_SPINQ(e),XQ(D)
- Try
- R(E);XP(f)
- Threat
- QAR(D),XQ(e)
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- Q(e);N_SPINQ(e),OGATE,XQ(D)::R(B),XQ(e)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- Refutation
- P(h);
- Try
- Actual
- S(F);
- Vars
- Q(e);CHECK,OGATE::QAR1(D),XQ(e)
- Q(e);CHECK,OGATE::QAR2(D),XQ(e)
- Q(e);CHECK,OGATE::QAR(D),XQ(e)
- P(b);CHECK,OGATEB::R(B),XS(b)
- Q(e);N_SPINQ(e),OGATE,XQ(D)::R(B),XQ(e)
- P(b);OGATEB::R(B),XQ(b)
- P(b);OGATEB::R(B),XB(b)
- P(b);OGATEB::R(B),XR(b)
- P(c);N_GUARD::B(A),XS(a)
- P(h);OGATE::QAR(D)
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).