MESON Chess Problem Database
Problem Display
PID: 3017 (8/Q5n1/b1pp4/2r5/2NkPR1N/1R1P1prp/3p1P1p/3K1n1B w - - 0 1)
Williams, Philip Hamilton
British Chess Magazine, 1916
#2
10 + 12
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Sxf3#
- 1...Rg2
- 2.Sxf3#
- 1...Rg4
- 2.Sxf3#
- 1...Rg5
- 2.Sxf3#
- 1...Rg6
- 2.Sxf3#
- 1...Bxc4
- 2.Qa1#
- 1...Bb5
- 2.Qa1#
- 1...Bb7
- 2.Qa1#
- 1...Bc8
- 2.Qa1#
- 1...Se3+
- 2.fxe3#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...d5
- 2.e5#
- 1...Rg1
- Tries
- 1.Bxf3?
- threat
- 2.e5#
- 1...Se3+
- 2.fxe3#
- 1...Rxf3
- 2.Sxf3#
- 1...Bxc4
- 2.Qa1#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Rg4!
- threat
- 1.Rf6?
- threat
- 2.Rxd6#
- 1...Se3+
- 2.fxe3#
- 1...Bxc4
- 2.Qa1#
- 1...Rg5
- 2.Sxf3#
- 1...Rg6
- 2.Sxf3#
- 1...Sf5
- 2.Sxf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...d5!
- threat
- 1.Rf7?
- 1...Se3+
- 2.fxe3#
- 1...Bxc4
- 2.Qa1#
- 1...Rg1
- 2.Sxf3#
- 1...Rg2
- 2.Sxf3#
- 1...Rg4
- 2.Sxf3#
- 1...Rg5
- 2.Sxf3#
- 1...Rg6
- 2.Sxf3#
- 1...Bb5
- 2.Qa1#
- 1...Bb7
- 2.Qa1#
- 1...Bc8
- 2.Qa1#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...d5!
- 1...Se3+
- 1.Rf8?
- 1...Se3+
- 2.fxe3#
- 1...Bxc4
- 2.Qa1#
- 1...Rg1
- 2.Sxf3#
- 1...Rg2
- 2.Sxf3#
- 1...Rg4
- 2.Sxf3#
- 1...Rg5
- 2.Sxf3#
- 1...Rg6
- 2.Sxf3#
- 1...Bb5
- 2.Qa1#
- 1...Bb7
- 2.Qa1#
- 1...Bc8
- 2.Qa1#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...d5!
- 1...Se3+
- 1.Qxg7+?
- 1...Rxg7
- 2.Sxf3#
- 1...Re5!
- 1...Rxg7
- 1.Bxf3?
- Keys
- 1.Rg4!
- 1...Se3+
- 2.fxe3#
- 1...Rxg4
- 2.Sxf3#
- 1...Bxc4
- 2.Qa1#
- 1...Rg1
- 2.Sxf3#
- 1...Rg2
- 2.Sxf3#
- 1...Bb5
- 2.Qa1#
- 1...Bb7
- 2.Qa1#
- 1...Bc8
- 2.Qa1#
- 1...Sf5
- 2.Sxf5#
- 1...Sh5
- 2.Sf5#
- 1...Se6
- 2.Sf5#
- 1...Se8
- 2.Sf5#
- 1...d5
- 2.Qxg7#
- 1...Se3+
- 1.Rg4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- R(e);N_GUARD::S(I),XP(d)
- B(i);OGATE,XS(F)::QAB(J)
- B(i);OGATE::QAB(J)
- S(a);CHECK,OGATE::P(C),XS(a)
- S(l);N_GUARD::S(I),XS(l)
- S(l);N_GUARD::S(I)
- P(k);SBLOCK::R(H)+P(G)
- Tries
- Try
- B(B);XP(d)
- Threat
- R(H)+P(G)
- Vars
- S(a);CHECK,OGATE::P(C),XS(a)
- R(e);XB(B)::S(I),XR(e)
- B(i);OGATE,XS(F)::QAB(J)
- S(l);N_GUARD::S(I)
- Refutation
- R(e);
- Try
- R(H);
- Threat
- R(H),XP(k)
- Vars
- S(a);CHECK,OGATE::P(C),XS(a)
- B(i);OGATE,XS(F)::QAB(J)
- R(e);N_GUARD::S(I),XP(d)
- S(l);N_GUARD::S(I),XS(l)
- S(l);N_GUARD::S(I)
- Refutation
- P(k);
- Try
- R(H);
- Vars
- S(a);CHECK,OGATE::P(C),XS(a)
- B(i);OGATE,XS(F)::QAB(J)
- R(e);N_GUARD::S(I),XP(d)
- B(i);OGATE::QAB(J)
- S(l);N_GUARD::S(I),XS(l)
- S(l);N_GUARD::S(I)
- Refutation
- P(k);
- Try
- R(H);
- Vars
- S(a);CHECK,OGATE::P(C),XS(a)
- B(i);OGATE,XS(F)::QAB(J)
- R(e);N_GUARD::S(I),XP(d)
- B(i);OGATE::QAB(J)
- S(l);N_GUARD::S(I),XS(l)
- S(l);N_GUARD::S(I)
- Refutation
- P(k);
- Try
- Q(J);CHECK,N_PINR(h),XS(l)
- Vars
- R(e);XQ(J)::S(I),XP(d)
- Refutation
- R(h);P_SPINR(h)
- Try
- Actual
- R(H);
- Vars
- S(a);CHECK,OGATE::P(C),XS(a)
- R(e);N_GUARD,XR(H)::S(I),XP(d)
- B(i);OGATE,XS(F)::QAB(J)
- R(e);N_GUARD::S(I),XP(d)
- B(i);OGATE::QAB(J)
- S(l);N_GUARD::S(I),XS(l)
- S(l);N_GUARD::S(I)
- P(k);::QAB(J),XS(l)
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).