MESON Chess Problem Database
Problem Display
PID: 184918 (8/2pbQ3/1n6/5pp1/1N1Rrk2/2p1N3/2P2K2/2nR4 w - - 0 1)
Williams, Philip Hamilton
British Chess Magazine, 1917
#2
7 + 9
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rxd4
- 2.Rxd4#
- 1...Ba4
- 2.Qxc7#
- 1...Bb5
- 2.Qxc7#
- 1...Bc6
- 2.Qxc7#
- 1...Be6
- 2.Qxc7#
- 1...Bc8
- 2.Qxc7#
- 1...Be8
- 2.Qxc7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sd3+
- 2.Sxd3#
- 1...Sa4
- 2.Sbd5#
- 1...Sc4
- 2.Sbd5#
- 1...Sd5
- 2.Sbxd5#
- 1...Sa8
- 2.Sbd5#
- 1...Sc8
- 2.Sbd5#
- 1...g4
- 2.Sg2#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...Rxd4
- Tries
- 1.Rxc1?
- threat
- 2.Sd3#
- 1...Bb5
- 2.Qxc7#
- 1...Rxd4!
- threat
- 1.Re1?
- 1...Sd3+
- 2.Sxd3#
- 1...Be6
- 2.Qxc7#
- 1...Ba4
- 2.Qxc7#
- 1...Bb5
- 2.Qxc7#
- 1...Bc6
- 2.Qxc7#
- 1...Bc8
- 2.Qxc7#
- 1...Be8
- 2.Qxc7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sa4
- 2.Sbd5#
- 1...Sc4
- 2.Sbd5#
- 1...Sd5
- 2.Sbxd5#
- 1...Sa8
- 2.Sbd5#
- 1...Sc8
- 2.Sbd5#
- 1...g4
- 2.Sg2#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...Rxd4!
- 1...Sd3+
- 1.Rg1?
- 1...Sd3+
- 2.Sxd3#
- 1...Be6
- 2.Qxc7#
- 1...Ba4
- 2.Qxc7#
- 1...Bb5
- 2.Qxc7#
- 1...Bc6
- 2.Qxc7#
- 1...Bc8
- 2.Qxc7#
- 1...Be8
- 2.Qxc7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sa4
- 2.Sed5#
- 2.Sbd5#
- 1...Sc4
- 2.Sed5#
- 2.Sbd5#
- 1...Sd5
- 2.Sexd5#
- 2.Sbxd5#
- 1...Sa8
- 2.Sed5#
- 2.Sbd5#
- 1...Sc8
- 2.Sed5#
- 2.Sbd5#
- 1...g4
- 2.Sg2#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...Rxd4!
- 1...Sd3+
- 1.Rh1?
- 1...Sd3+
- 2.Sxd3#
- 1...Be6
- 2.Qxc7#
- 1...Ba4
- 2.Qxc7#
- 1...Bb5
- 2.Qxc7#
- 1...Bc6
- 2.Qxc7#
- 1...Bc8
- 2.Qxc7#
- 1...Be8
- 2.Qxc7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sa4
- 2.Sbd5#
- 1...Sc4
- 2.Sbd5#
- 1...Sd5
- 2.Sbxd5#
- 1...Sa8
- 2.Sbd5#
- 1...Sc8
- 2.Sbd5#
- 1...g4
- 2.Sg2#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...Rxd4!
- 1...Sd3+
- 1.R1d2?
- 1...Sd3+
- 2.Sxd3#
- 1...Rxd4
- 2.Rxd4#
- 1...Be6
- 2.Qxc7#
- 1...Ba4
- 2.Qxc7#
- 1...Bb5
- 2.Qxc7#
- 1...Bc6
- 2.Qxc7#
- 1...Bc8
- 2.Qxc7#
- 1...Be8
- 2.Qxc7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sa4
- 2.Sbd5#
- 1...Sc4
- 2.Sbd5#
- 1...Sd5
- 2.Sbxd5#
- 1...Sa8
- 2.Sbd5#
- 1...Sc8
- 2.Sbd5#
- 1...g4
- 2.Sg2#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...cxd2!
- 1...Sd3+
- 1.Rc4?
- 1...Sd3+
- 2.Sxd3#
- 1...Sxc4
- 2.Sbd5#
- 1...Be6
- 2.Qxc7#
- 1...Sa2
- 2.Sd3#
- 1...Rd4
- 2.Rdxd4#
- 2.Rcxd4#
- 1...Ba4
- 2.Qxc7#
- 1...Bb5
- 2.Qxc7#
- 1...Bc6
- 2.Qxc7#
- 1...Bc8
- 2.Qxc7#
- 1...Be8
- 2.Qxc7#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sa4
- 2.Sbd5#
- 1...Sd5
- 2.Sbxd5#
- 1...Sa8
- 2.Sbd5#
- 1...Sc8
- 2.Sbd5#
- 1...g4
- 2.Sg2#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...Rxc4!
- 1...Sd3+
- 1.Qxd7?
- threat
- 2.Qxf5#
- 2.Qxc7#
- 1...Sd3+
- 2.Sxd3#
- 1...Ke5
- 2.Qxf5#
- 1...Rxd4
- 2.Qxf5#
- 2.Qxd4#
- 1...g4
- 2.Qxf5#
- 1...Sc4
- 2.Qxf5#
- 1...Sd5
- 2.Qxf5#
- 1...Sa8
- 2.Qxf5#
- 1...Sc8
- 2.Qxf5#
- 1...c5
- 2.Qxf5#
- 2.Qd6#
- 2.Qc7#
- 1...c6
- 2.Qxf5#
- 2.Qd6#
- 2.Qc7#
- 1...Sxd7!
- threat
- 1.Rxc1?
- Keys
- 1.Rf1!
- 1...Sd3+
- 2.Sxd3#
- 1...Rxd4
- 2.Kg2#
- 1...Be6
- 2.Qxc7#
- 1...Ba4
- 2.Qxc7#
- 1...Bb5
- 2.Qxc7#
- 1...Bc6
- 2.Qxc7#
- 1...Bc8
- 2.Qxc7#
- 1...Be8
- 2.Qxc7#
- 1...Sa2
- 2.Sd3#
- 1...Se2
- 2.Sd3#
- 1...Sb3
- 2.Sd3#
- 1...Sa4
- 2.Sbd5#
- 1...Sc4
- 2.Sbd5#
- 1...Sd5
- 2.Sbxd5#
- 1...Sa8
- 2.Sbd5#
- 1...Sc8
- 2.Sbd5#
- 1...g4
- 2.Sg2#
- 1...c5
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...Sd3+
- 1.Rf1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(c);N_SPINR(c),OGATE,XR(F)::R(A),XR(c)
- B(i);OGATE::QAB(G),XP(h)
- S(a);N_GUARD::S(E)
- S(a);CHECK,N_GUARD::S(E),XS(a)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(f);SBLOCK::S(D)
- P(h);N_GUARD::QAB(G)
- Tries
- Try
- R(A);XS(a)
- Threat
- S(E)
- Vars
- B(i);OGATE::QAB(G),XP(h)
- Refutation
- R(c);N_SPINR(c),XR(F)
- Try
- R(A);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- B(i);OGATE::QAB(G),XP(h)
- S(a);N_GUARD::S(E)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(f);SBLOCK::S(D)
- P(h);N_GUARD::QAB(G)
- Refutation
- R(c);N_SPINR(c),XR(F)
- Try
- R(A);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- B(i);OGATE::QAB(G),XP(h)
- S(a);N_GUARD::S(E)
- P(f);SBLOCK::S(D)
- P(h);N_GUARD::QAB(G)
- Refutation
- R(c);N_SPINR(c),XR(F)
- Try
- R(A);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- B(i);OGATE::QAB(G),XP(h)
- S(a);N_GUARD::S(E)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(f);SBLOCK::S(D)
- P(h);N_GUARD::QAB(G)
- Refutation
- R(c);N_SPINR(c),XR(F)
- Try
- R(A);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- R(c);N_SPINR(c),OGATE,XR(F)::R(A),XR(c)
- B(i);OGATE::QAB(G),XP(h)
- S(a);N_GUARD::S(E)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(f);SBLOCK::S(D)
- P(h);N_GUARD::QAB(G)
- Refutation
- P(b);XR(A)
- Try
- R(F);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- S(g);N_GUARD,N_SPINR(c),XR(F)::S(E)
- B(i);OGATE::QAB(G),XP(h)
- S(a);N_GUARD::S(E)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(f);SBLOCK::S(D)
- P(h);N_GUARD::QAB(G)
- Refutation
- R(c);N_SPINR(c),XR(F)
- Try
- Q(G);XB(i)
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- K(d);N_SPINR(c),S_FLIGHT::QAR1(G),XP(e)
- P(f);::QAR1(G),XP(e)
- S(g);::QAR1(G),XP(e)
- Refutation
- S(g);XQ(G)
- Try
- Actual
- R(A);
- Vars
- S(a);CHECK,N_GUARD::S(E),XS(a)
- R(c);N_SPINR(c),XR(F)::R(A)+K(C)
- B(i);OGATE::QAB(G),XP(h)
- S(a);N_GUARD::S(E)
- S(g);N_GUARD::S(E)
- S(g);N_GUARD::S(E),XS(g)
- P(f);SBLOCK::S(D)
- P(h);N_GUARD::QAB(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).