MESON Chess Problem Database
Problem Display
PID: 77639 (8/5N2/8/5nR1/8/3K1kn1/8/6Q1 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1978
#2
4 + 3
SOLUTION
- SOUND
- Sets
- 1...Kf4
- 2.Qf2#
- 1...Sf1
- 2.Rxf5#
- 2.Qxf1#
- 1...Sh1
- 2.Rxf5#
- 1...Se2
- 2.Qf1#
- 1...Se4
- 2.Rxf5#
- 1...Sh5
- 2.Qf1#
- 1...Se3
- 2.Qxg3#
- 1...Sd4
- 2.Qxg3#
- 1...Sh4
- 2.Qxg3#
- 1...Sd6
- 2.Qxg3#
- 1...Sh6
- 2.Qxg3#
- 1...Se7
- 2.Qxg3#
- 1...Sg7
- 2.Qxg3#
- 1...Kf4
- Tries
- 1.Sd6?
- 1...Sxd6
- 2.Qxg3#
- 1...Sf1
- 2.Rxf5#
- 2.Qxf1#
- 1...Sh1
- 2.Rxf5#
- 1...Se2
- 2.Qf1#
- 1...Se4
- 2.Rxf5#
- 1...Sh5
- 2.Qf1#
- 1...Se3
- 2.Qxg3#
- 1...Sd4
- 2.Qxg3#
- 1...Sh4
- 2.Qxg3#
- 1...Sh6
- 2.Qxg3#
- 1...Se7
- 2.Qxg3#
- 1...Sg7
- 2.Qxg3#
- 1...Kf4!
- 1...Sxd6
- 1.Sh6?
- 1...Sxh6
- 2.Qxg3#
- 1...Sf1
- 2.Rxf5#
- 2.Qxf1#
- 1...Sh1
- 2.Rxf5#
- 1...Se2
- 2.Qf1#
- 1...Se4
- 2.Rxf5#
- 1...Sh5
- 2.Qf1#
- 1...Se3
- 2.Qxg3#
- 1...Sd4
- 2.Qxg3#
- 1...Sh4
- 2.Qxg3#
- 1...Sd6
- 2.Qxg3#
- 1...Se7
- 2.Qxg3#
- 1...Sg7
- 2.Qxg3#
- 1...Kf4!
- 1...Sxh6
- 1.Sd8?
- 1...Sf1
- 2.Rxf5#
- 2.Qxf1#
- 1...Sh1
- 2.Rxf5#
- 1...Se2
- 2.Qf1#
- 1...Se4
- 2.Rxf5#
- 1...Sh5
- 2.Qf1#
- 1...Se3
- 2.Qxg3#
- 1...Sd4
- 2.Qxg3#
- 1...Sh4
- 2.Qxg3#
- 1...Sd6
- 2.Qxg3#
- 1...Sh6
- 2.Qxg3#
- 1...Se7
- 2.Qxg3#
- 1...Sg7
- 2.Qxg3#
- 1...Kf4!
- 1...Sf1
- 1.Sh8?
- 1...Sf1
- 2.Rxf5#
- 2.Qxf1#
- 1...Sh1
- 2.Rxf5#
- 1...Se2
- 2.Qf1#
- 1...Se4
- 2.Rxf5#
- 1...Sh5
- 2.Qf1#
- 1...Se3
- 2.Qxg3#
- 1...Sd4
- 2.Qxg3#
- 1...Sh4
- 2.Qxg3#
- 1...Sd6
- 2.Qxg3#
- 1...Sh6
- 2.Qxg3#
- 1...Se7
- 2.Qxg3#
- 1...Sg7
- 2.Qxg3#
- 1...Kf4!
- 1...Sf1
- 1.Rxg3+?
- 1...Kf4
- 2.Qf2#
- 1...Sxg3!
- 1...Kf4
- 1.Qg2+?
- 1...Kf4
- 2.Qf2#
- 1...Kxg2!
- 1...Kf4
- 1.Sd6?
- Keys
- 1.Qh2!
- 1...Kf4
- 2.Qf2#
- 1...Sh1
- 2.Se5#
- 1...Sf1
- 2.Se5#
- 1...Se2
- 2.Se5#
- 1...Se4
- 2.Se5#
- 1...Sh5
- 2.Se5#
- 1...Se3
- 2.Qxg3#
- 1...Sd4
- 2.Qxg3#
- 1...Sh4
- 2.Qxg3#
- 1...Sd6
- 2.Qxg3#
- 1...Sh6
- 2.Qxg3#
- 1...Se7
- 2.Qxg3#
- 1...Sg7
- 2.Qxg3#
- 1...Kf4
- 1.Qh2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(a);P-FLIGHT::QAR2(A)
- S(b);N_GUARD::R(C),XS(c)
- S(b);N_GUARD::QAR2(A)
- S(c);N_GUARD::QAR1(A),XS(b)
- Tries
- Try
- S(D);
- Vars
- S(c);N_GUARD,XS(D)::QAR1(A),XS(b)
- S(b);N_GUARD::R(C),XS(c)
- S(b);N_GUARD::QAR2(A)
- S(c);N_GUARD::QAR1(A),XS(b)
- Refutation
- K(a);P-FLIGHT
- Try
- S(D);
- Vars
- S(c);N_GUARD,XS(D)::QAR1(A),XS(b)
- S(b);N_GUARD::R(C),XS(c)
- S(b);N_GUARD::QAR2(A)
- S(c);N_GUARD::QAR1(A),XS(b)
- Refutation
- K(a);P-FLIGHT
- Try
- S(D);
- Vars
- S(b);N_GUARD::R(C),XS(c)
- S(b);N_GUARD::QAR2(A)
- S(c);N_GUARD::QAR1(A),XS(b)
- Refutation
- K(a);P-FLIGHT
- Try
- S(D);
- Vars
- S(b);N_GUARD::R(C),XS(c)
- S(b);N_GUARD::QAR2(A)
- S(c);N_GUARD::QAR1(A),XS(b)
- Refutation
- K(a);P-FLIGHT
- Try
- R(C);CHECK,XS(b)
- Vars
- K(a);P-FLIGHT::QAR2(A)
- Refutation
- S(c);XR(C)
- Try
- Q(A);CHECK
- Vars
- K(a);P-FLIGHT::QAR2(A)
- Refutation
- K(a);P_SPINS(b),S_FLIGHT,XQ(A)
- Try
- Actual
- Q(A);
- Vars
- K(a);P-FLIGHT,P_SPINS(b)::QAR2(A)
- S(b);::S(D)
- S(c);N_GUARD::QAR1(A),XS(b)
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).