MESON Chess Problem Database
Problem Display
PID: 46182 (K3RN1n/1p4p1/8/3N1kP1/1Q6/7P/n2Bp1q1/4rr2 w - - 0 1)
Rothwell, Stephen
The Problemist Supplement, 2002
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Qg4#
- 1...Qxh3
- 2.Qe4#
- 1...Qe4
- 2.Qxe4#
- 1...Qxd5
- 2.Qg4#
- 1...Qg1
- 2.Qe4#
- 1...Qf2
- 2.Qe4#
- 2.Qg4#
- 1...Qh2
- 2.Qe4#
- 2.Qg4#
- 1...Qg3
- 2.Qe4#
- 1...Qg4
- 2.Qxg4#
- 2.hxg4#
- 1...Qxg5
- 2.Qe4#
- 1...Rg1
- 2.Qf4#
- 1...Rh1
- 2.Qf4#
- 1...Rf3
- 2.Qe4#
- 1...Rf4
- 2.Qxf4#
- 1...Qh1
- Tries
- 1.Qc5?
- threat
- 2.Qc8#
- 1...Qxd5
- 2.Qxd5#
- 1...Rf4
- 2.Se3#
- 1...Qe4
- 2.Se7#
- 1...Rc1!
- threat
- 1.Qd6?
- threat
- 2.Re5#
- 2.Qe5#
- 2.Qe6#
- 2.Qd7#
- 1...Qxh3
- 2.Qe6#
- 2.Qd7#
- 1...Qxd5
- 2.Qxd5#
- 1...Rf4
- 2.Re5#
- 2.Qxf4#
- 2.Qe5#
- 1...Qh2
- 2.Qe6#
- 2.Qd7#
- 1...Qg3
- 2.Qe6#
- 2.Qd7#
- 1...Sg6
- 2.Qe6#
- 2.Qxg6#
- 2.Qd7#
- 1...Sf7
- 2.Qe6#
- 2.Qg6#
- 2.Qd7#
- 1...Qe4!
- threat
- 1.Qe7?
- threat
- 2.Qe5#
- 2.Qe6#
- 2.Qd7#
- 1...Qxh3
- 2.Qe4#
- 2.Qe6#
- 2.Qd7#
- 1...Qe4
- 2.Qxe4#
- 1...Qh2
- 2.Qe4#
- 2.Qe6#
- 2.Qd7#
- 1...Qg3
- 2.Qe4#
- 2.Qe6#
- 2.Qd7#
- 1...Rf4
- 2.Se3#
- 2.Qe5#
- 1...Sg6
- 2.Qe6#
- 2.Qd7#
- 2.Qf7#
- 1...Sf7
- 2.Qe6#
- 2.Qd7#
- 2.Qxf7#
- 1...Qxd5!
- threat
- 1.Qb1+?
- 1...Qe4
- 2.Qxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Qa4?
- threat
- 2.Qd7#
- 1...Qxd5
- 2.Qg4#
- 1...Rf4
- 2.Qxf4#
- 1...Qe4
- 2.Qxe4#
- 1...b5!
- threat
- 1.Qc4?
- threat
- 2.Qc8#
- 1...Qxd5
- 2.Qxd5#
- 2.Qg4#
- 1...Rf4
- 2.Qxf4#
- 1...Qe4
- 2.Qxe4#
- 1...Rc1!
- threat
- 1.Qd4?
- threat
- 2.Se7#
- 2.Re5#
- 2.Qe5#
- 1...Qxh3
- 2.Se7#
- 2.Re5#
- 2.Qe4#
- 1...Qxd5
- 2.Qg4#
- 2.Qxd5#
- 1...Qxg5
- 2.Re5#
- 2.Qe5#
- 2.Qd3#
- 2.Qe4#
- 1...Rf4
- 2.Re5#
- 2.Qe5#
- 2.Qxf4#
- 1...Qe4
- 2.Qxe4#
- 1...Qh2
- 2.Se7#
- 2.Qd3#
- 2.Qe4#
- 2.Qg4#
- 1...Qg3
- 2.Se7#
- 2.Qe4#
- 1...Sf7
- 2.Se7#
- 1...b5
- 2.Re5#
- 2.Qe5#
- 1...b6
- 2.Re5#
- 2.Qe5#
- 1...Sg6!
- threat
- 1.Qc5?
- Keys
- 1.Qb5!
- threat
- 2.Qd7#
- 1...Qxd5
- 2.Qxd5#
- 1...Rf4
- 2.Se3#
- 1...Qe4
- 2.Se7#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- Q(e);N_GUARD::QAB1(C)
- Q(e);N_GUARD,XP(B)::QAB1(C)
- Q(e);N_GUARD::QAB1(C),XQ(e)
- Q(e);N_GUARD,XS(D)::QAB1(C)
- Q(e);N_GUARD,XP(E)::QAB1(C)
- R(b);N_GUARD::QAR1(C)
- R(b);S_CUTQ(e)::QAB1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- Tries
- Try
- Q(C);
- Threat
- QAB(C)
- Vars
- Q(e);OGATE,P_SPINQ(e),XS(D)::QAR2(C),XQ(e)
- R(b);SBLOCK::QAR(C)+S(D),DCHECK
- Q(e);SBLOCK::QAR(C)+S(D),DCHECK
- Refutation
- R(a);
- Try
- Q(C);
- Threat
- DUALS(4)
- Vars
- Q(e);OGATE,XS(D)::QAR2(C),XQ(e)
- Refutation
- Q(e);
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- Q(e);N_GUARD::QAB1(C),XQ(e)
- Refutation
- Q(e);XS(D)
- Try
- Q(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::QAB1(C),XQ(e)
- Refutation
- R(a);XQ(C)
- Try
- Q(C);
- Threat
- QAB(C)
- Vars
- Q(e);N_GUARD,XS(D)::QAB1(C)
- R(b);N_GUARD::QAR1(C),XR(b)
- Q(e);N_GUARD::QAB1(C),XQ(e)
- Refutation
- P(g);P_PINS(D)
- Try
- Q(C);
- Threat
- QAB(C)
- Vars
- R(b);N_GUARD::QAR1(C),XR(b)
- Q(e);N_GUARD::QAB1(C),XQ(e)
- Refutation
- R(a);
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- Q(e);N_GUARD::QAB1(C),XQ(e)
- S(i);::S(D)
- Refutation
- S(i);
- Try
- Actual
- Q(C);
- Threat
- QAB(C)
- Vars
- Q(e);OGATE,P_SPINQ(e),XS(D)::QAR2(C),XQ(e)
- R(b);SBLOCK::QAR(C)+S(D),DCHECK
- Q(e);SBLOCK::QAR(C)+S(D),DCHECK
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).