MESON Chess Problem Database
Problem Display
PID: 211132 (8/1p6/1p1p2N1/1Kn1pQp1/3k2p1/2pPN1R1/2P5/8 w - - 0 1)
Shelley, HR
The Observer, 1921
(First published on Sun Oct 9 1921)
#2
7 + 9
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Sb3
- 2.Qe4#
- 1...Sxd3
- 2.Qxd3#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...e4
- 2.Qd5#
- 2.Qf6#
- 1...d5
- 2.Qxe5#
- 1...Sb3
- Tries
- 1.Sf4?
- threat
- 2.Se2#
- 1...exf4
- 2.Qd5#
- 2.Qf6#
- 1...gxf4!
- threat
- 1.Se7?
- 1...Sxd3
- 2.Qxd3#
- 1...e4
- 2.Qd5#
- 2.Qf6#
- 1...Sb3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...d5!
- 1...Sxd3
- 1.Sf8?
- 1...Sxd3
- 2.Se6#
- 2.Qxd3#
- 1...e4
- 2.Qd5#
- 2.Qf6#
- 1...Sb3
- 2.Se6#
- 2.Qe4#
- 1...Sa4
- 2.Se6#
- 2.Qe4#
- 1...Se4
- 2.Se6#
- 2.Qxe4#
- 1...Sa6
- 2.Se6#
- 2.Qe4#
- 1...Se6
- 2.Sxe6#
- 2.Qe4#
- 1...Sd7
- 2.Se6#
- 2.Qe4#
- 1...d5!
- 1...Sxd3
- 1.Sh8?
- 1...Sxd3
- 2.Qxd3#
- 1...e4
- 2.Qd5#
- 2.Qf6#
- 1...Sb3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...d5!
- 1...Sxd3
- 1.Qxg4+?
- 1...Se4
- 2.Qxe4#
- 1...e4!
- 1...Se4
- 1.Qe6?
- threat
- 2.Sf5#
- 2.Qc4#
- 2.Qd5#
- 2.Qxd6#
- 1...Sxd3
- 2.Qc4#
- 2.Qd5#
- 1...Se4
- 2.Sf5#
- 2.Qc4#
- 2.Qd5#
- 1...d5
- 2.Sf5#
- 2.Qxd5#
- 2.Qxe5#
- 1...Sxe6!
- threat
- 1.Qf3?
- threat
- 2.Sf5#
- 2.Qd5#
- 1...e4
- 2.Qf6#
- 1...Se4
- 2.Qxe4#
- 1...d5
- 2.Sf5#
- 2.Qxd5#
- 1...gxf3!
- threat
- 1.Qf7?
- threat
- 2.Sf5#
- 2.Qc4#
- 2.Qd5#
- 1...Sxd3
- 2.Qc4#
- 2.Qd5#
- 1...d5
- 2.Sf5#
- 2.Qxd5#
- 1...Se6!
- threat
- 1.Sf4?
- Keys
- 1.Qc8!
- 1...Sxd3
- 2.Qc4#
- 1...e4
- 2.Qh8#
- 1...Sb3
- 2.Qc4#
- 1...Sa4
- 2.Qc4#
- 1...Se4
- 2.Qc4#
- 1...Sa6
- 2.Qc4#
- 1...Se6
- 2.Qc4#
- 1...Sd7
- 2.Qc4#
- 1...d5
- 2.Sf5#
- 1...Sxd3
- 1.Qc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(d);N_GUARD::QAR1(F)
- S(d);OGATE,XP(B)::QAR1(F),XS(d)
- S(d);N_GUARD::QAR1(F),XS(d)
- P(h);N_GUARD::QAB1(F),XP(e)
- Tries
- Try
- S(G);
- Threat
- S(G)
- Refutation
- P(f);XS(G)
- Try
- S(G);
- Vars
- S(d);OGATE,XP(B)::QAR1(F),XS(d)
- S(d);N_GUARD::QAR1(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- Refutation
- P(h);
- Try
- S(G);
- Refutation
- P(h);
- Try
- S(G);
- Vars
- S(d);OGATE,XP(B)::QAR1(F),XS(d)
- S(d);N_GUARD::QAR1(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- Refutation
- P(h);
- Try
- Q(F);CHECK,XP(c)
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAR1(F),XS(d)
- Refutation
- P(e);P_SPINP(e)
- Try
- Q(F);
- Threat
- DUALS(4)
- Refutation
- S(d);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- P(e);OGATEB::QAB(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- Refutation
- P(c);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(3)
- Refutation
- S(d);
- Try
- Actual
- Q(F);
- Vars
- S(d);OGATE,XP(B)::QAR1(F)
- P(e);OGATEB::QAB(F)
- S(d);OGATE::QAR1(F)
- P(h);SBLOCK::S(C)
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).