MESON Chess Problem Database
Problem Display
PID: 9798 (8/1N6/2B2p2/1n1Pkrn1/1Q6/1P1P1p1N/5p2/5K2 w - - 0 1)
Heathcote, Godfrey
Alkmaarsche Courant, 1910
#2
8 + 7
| 2681 | All Change Here! | 1919 |
| 5424 | Versunkene Schatze | 1998 |
| 56 | The Problemist | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Rf4
- 2.Qxf4#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd4
- 2.Qd6#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...Sc7
- 2.Qc3#
- 1...Sxh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Rf4
- Tries
- 1.Kxf2?
- 1...Se4+
- 2.Qxe4#
- 1...Rf4
- 2.Qxf4#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd4
- 2.Qd6#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...Sc7
- 2.Qc3#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Sxh3+!
- 1...Se4+
- 1.Sxf2?
- threat
- 2.Sg4#
- 1...Sd4
- 2.Qd6#
- 1...Se4
- 2.Qxe4#
- 1...Rf4!
- threat
- 1.Sc5?
- threat
- 2.Sd7#
- 1...Rf4
- 2.Qxf4#
- 1...Kd6!
- threat
- 1.Bxb5?
- 1...Kxd5
- 2.Qd6#
- 1...Sxh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Rf4!
- 1...Kxd5
- 1.Qc4?
- 1...Sxh3
- 2.Qe4#
- 1...Rf4
- 2.Qxf4#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...Sc7
- 2.Qc3#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Sd4!
- 1...Sxh3
- 1.Qg4?
- 1...Sxh3
- 2.Qe4#
- 1...Rf4
- 2.Qxf4#
- 1...Se4
- 2.Qxe4#
- 1...Sa3
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sd6
- 2.d4#
- 1...Sa7
- 2.d4#
- 1...Sc7
- 2.d4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Sd4!
- 1...Sxh3
- 1.Qh4?
- 1...Sxh3
- 2.Qe4#
- 1...Rf4
- 2.Qxf4#
- 1...Se4
- 2.Qxe4#
- 1...Sa3
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sd6
- 2.d4#
- 1...Sa7
- 2.d4#
- 1...Sc7
- 2.d4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Sd4!
- 1...Sxh3
- 1.Kxf2?
- Keys
- 1.Sd6!
- 1...Sxd6
- 2.Qc3#
- 1...Sxh3
- 2.Sf7#
- 1...Rf4
- 2.Qxf4#
- 1...Sa3
- 2.d4#
- 1...Sc3
- 2.d4#
- 1...Sd4
- 2.Sc4#
- 1...Sa7
- 2.d4#
- 1...Sc7
- 2.d4#
- 1...Se4
- 2.Sf7#
- 1...Se6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Sh7
- 2.Sf7#
- 1...Sxd6
- 1.Sd6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 10
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(e);N_GUARD::QAB1(E),XR(e)
- S(c);N_GUARD::QAB(E)
- S(c);N_GUARD::QAB(E),XS(c)
- S(c);N_GUARD,SBLOCK::QAB1(E)
- S(f);N_GUARD,XS(D)::QAR1(E)
- S(f);N_GUARD::QAR1(E),XS(f)
- S(f);N_GUARD::QAR1(E)
- Tries
- Try
- K(A);P-FLIGHT,XP(a)
- Vars
- S(f);CHECK,N_GUARD::QAR1(E),XS(f)
- R(e);N_GUARD::QAB1(E),XR(e)
- S(c);N_GUARD::QAB(E)
- S(c);N_GUARD::QAB(E),XS(c)
- S(c);N_GUARD,SBLOCK::QAB1(E)
- S(f);N_GUARD::QAR1(E)
- Refutation
- S(f);CHECK,XS(D)
- Try
- S(D);XP(a)
- Threat
- S(D)
- Vars
- S(c);N_GUARD,SBLOCK::QAB1(E)
- S(f);N_GUARD::QAR1(E),XS(f)
- Refutation
- R(e);
- Try
- S(H);
- Threat
- S(H)
- Vars
- R(e);N_GUARD::QAB1(E),XR(e)
- Refutation
- K(d);S_FLIGHT
- Try
- B(G);XS(c)
- Vars
- K(d);P-FLIGHT,XP(F)::QAR1(E)
- S(f);N_GUARD,XS(D)::QAR1(E)
- S(f);N_GUARD::QAR1(E),XS(f)
- S(f);N_GUARD::QAR1(E)
- Refutation
- R(e);
- Try
- Q(E);
- Vars
- S(f);N_GUARD,XS(D)::QAR1(E)
- R(e);N_GUARD::QAB1(E),XR(e)
- S(c);N_GUARD::QAB(E)
- S(c);N_GUARD::QAB(E),XS(c)
- S(f);N_GUARD::QAR1(E),XS(f)
- S(f);N_GUARD::QAR1(E)
- Refutation
- S(c);
- Try
- Q(E);
- Vars
- S(f);N_GUARD,XS(D)::QAR1(E)
- R(e);N_GUARD::QAB1(E),XR(e)
- S(f);N_GUARD::QAR1(E),XS(f)
- S(c);N_GUARD::P(C)
- S(f);N_GUARD::QAR1(E)
- Refutation
- S(c);
- Try
- Q(E);
- Vars
- S(f);N_GUARD,XS(D)::QAR1(E)
- R(e);N_GUARD::QAB1(E),XR(e)
- S(f);N_GUARD::QAR1(E),XS(f)
- S(c);N_GUARD::P(C)
- S(f);N_GUARD::QAR1(E)
- Refutation
- S(c);
- Try
- Actual
- S(H);
- Vars
- S(c);N_GUARD,SBLOCK,XS(H)::QAB(E)
- S(f);N_GUARD,XS(D)::S(H)
- R(e);N_GUARD::QAB1(E),XR(e)
- S(c);N_GUARD::P(C)
- S(c);SBLOCK::S(H)
- S(f);N_GUARD::S(H)
- S(f);N_GUARD::S(H),XS(f)
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).