MESON Chess Problem Database
Problem Display
PID: 2972 (Q6B/3pR3/3ppq2/3rk3/R2b1p1N/4nB2/K7/8 w - - 0 1)
Williams, Philip Hamilton
Morning Post, 1914
#2
7 + 9
| 15 | British Chess Magazine | 1917 |
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Qg7
- 2.Bxg7#
- 1...Qxh8
- 2.Qxh8#
- 1...Ra5
- 2.Qe4#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Qg7
- Tries
- 1.Kb1?
- 1...Qxh8
- 2.Qxh8#
- 1...Qg7
- 2.Bxg7#
- 1...Ra5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Rb5+!
- 1...Qxh8
- 1.Kb3?
- 1...Qxh8
- 2.Qxh8#
- 1...Qg7
- 2.Bxg7#
- 1...Ra5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Rb5+!
- 1...Qxh8
- 1.Bg7?
- 1...Ra5
- 2.Qe4#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Qxg7!
- 1...Ra5
- 1.Rb4?
- 1...Qxh8
- 2.Qxh8#
- 1...Qg7
- 2.Bxg7#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Ra5+!
- 1...Qxh8
- 1.Rc4?
- 1...Qxh8
- 2.Qxh8#
- 1...Sxc4
- 2.Qxd5#
- 1...Qg7
- 2.Bxg7#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Ra5+!
- 1...Qxh8
- 1.Rf7?
- threat
- 2.Bxf6#
- 1...Qxh8
- 2.Sg6#
- 2.Qxh8#
- 1...Qg7
- 2.Sg6#
- 2.Bxg7#
- 1...Sg4!
- threat
- 1.Rg7?
- 1...Qxh4
- 2.Rg5#
- 1...Qxg7
- 2.Bxg7#
- 1...Qg5
- 2.Rxg5#
- 1...Qe7
- 2.Rg5#
- 2.Rxe7#
- 1...Qd8
- 2.Rg5#
- 1...Qf5
- 2.Rg5#
- 1...Qg6
- 2.Rxg6#
- 1...Qh6
- 2.Rg5#
- 1...Qf7
- 2.Rg5#
- 2.Rxf7#
- 1...Qf8
- 2.Rg5#
- 1...Ra5
- 2.Qe4#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Rg5#
- 1...Sf1
- 2.Rg5#
- 1...Sc2
- 2.Rg5#
- 1...Sg2
- 2.Rg5#
- 1...Sc4
- 2.Rg5#
- 1...Sg4
- 2.Rg5#
- 1...Sf5!
- 1...Qxh4
- 1.Re8?
- 1...Qg7
- 2.Bxg7#
- 1...Ra5
- 2.Qe4#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Qxh8!
- 1...Qg7
- 1.Qb7?
- 1...Qg7
- 2.Bxg7#
- 1...Ra5
- 2.Qe4#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Qxd5#
- 1...Sf1
- 2.Qxd5#
- 1...Sc2
- 2.Qxd5#
- 1...Sg2
- 2.Qxd5#
- 1...Sc4
- 2.Qxd5#
- 1...Sg4
- 2.Qxd5#
- 1...Sf5
- 2.Sg6#
- 2.Qxd5#
- 1...Qxh8!
- 1...Qg7
- 1.Qf8?
- threat
- 2.Bxf6#
- 2.Qxf6#
- 1...Qxh8
- 2.Sg6#
- 2.Qxh8#
- 1...Qg7
- 2.Sg6#
- 2.Bxg7#
- 2.Qxg7#
- 1...Sg4!
- threat
- 1.Kb1?
- Keys
- 1.Rh7!
- 1...Qxh8
- 2.Qxh8#
- 1...Qg7
- 2.Bxg7#
- 1...Ra5
- 2.Qe4#
- 1...Rb5
- 2.Qe4#
- 1...Rc5
- 2.Qe4#
- 1...Ba1
- 2.Re4#
- 1...Bb2
- 2.Re4#
- 1...Bc3
- 2.Re4#
- 1...Bc5
- 2.Re4#
- 1...Bb6
- 2.Re4#
- 1...Ba7
- 2.Re4#
- 1...Sd1
- 2.Rh5#
- 1...Sf1
- 2.Rh5#
- 1...Sc2
- 2.Rh5#
- 1...Sg2
- 2.Rh5#
- 1...Sc4
- 2.Rh5#
- 1...Sg4
- 2.Rh5#
- 1...Sf5
- 2.Sg6#
- 1...Qxh8
- 1.Rh7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(h);OGATEB::B(G),XQ(h)
- Q(h);N_SPINQ(h),OGATE,XB(G)::QAB(F),XQ(h)
- R(d);OGATE,P_PINR(C)::QAR1(F)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- Q(h);N_SPINQ(h),OGATE,XB(G)::QAB(F),XQ(h)
- Q(h);OGATEB::B(G),XQ(h)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Refutation
- R(d);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- Q(h);N_SPINQ(h),OGATE,XB(G)::QAB(F),XQ(h)
- Q(h);OGATEB::B(G),XQ(h)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Refutation
- R(d);CHECK
- Try
- B(G);
- Vars
- R(d);OGATE,P_PINR(C)::QAR1(F)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Refutation
- Q(h);N_SPINQ(h),XB(G)
- Try
- R(C);
- Vars
- Q(h);N_SPINQ(h),OGATE,XB(G)::QAB(F),XQ(h)
- Q(h);OGATEB::B(G),XQ(h)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Refutation
- R(d);CHECK
- Try
- R(C);
- Vars
- Q(h);N_SPINQ(h),OGATE,XB(G)::QAB(F),XQ(h)
- S(a);N_GUARD,XR(C)::QAR1(F),XR(d)
- Q(h);OGATEB::B(G),XQ(h)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Refutation
- R(d);CHECK
- Try
- R(E);N_PINP(g)
- Threat
- B(G),XQ(h)
- Refutation
- S(a);
- Try
- R(E);N_PINP(g),N_PINQ(h)
- Vars
- Q(h);XS(D)::B(G)+R(E),DCHECK
- Q(h);OGATE,P_SPINQ(h),XR(E)::B(G),XQ(h)
- Q(h);::B(G)+R(E),DCHECK,XQ(h)
- Q(h);::B(G)+R(E),DCHECK
- Q(h);S_CUTS(a)::B(G)+R(E)
- Q(h);OGATEB::B(G)+R(E),XQ(h)
- R(d);OGATE,P_PINR(C)::QAR1(F)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::R(E)
- Refutation
- S(a);
- Try
- R(E);
- Vars
- Q(h);OGATEB::B(G),XQ(h)
- R(d);OGATE,P_PINR(C)::QAR1(F)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Refutation
- Q(h);N_SPINQ(h),XB(G)
- Try
- Q(F);
- Vars
- Q(h);OGATEB::B(G),XQ(h)
- R(d);OGATE,P_PINR(C)::QAR1(F)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::QAR1(F),XR(d)
- Refutation
- Q(h);N_SPINQ(h),XB(G)
- Try
- Q(F);
- Threat
- DUALS(2)
- Refutation
- S(a);
- Try
- Actual
- R(E);N_PINP(g)
- Vars
- Q(h);N_SPINQ(h),OGATE,XB(G)::QAB(F),XQ(h)
- Q(h);OGATEB::B(G),XQ(h)
- R(d);OGATE,P_PINR(C)::QAR1(F)
- R(d);OGATE::QAR1(F)
- B(b);OGATE::R1(C)
- S(a);N_GUARD::R(E)
- S(a);SBLOCK::S(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).