MESON Chess Problem Database
Problem Display
PID: 265 (8/K2nQ3/2N3r1/5k1B/4N3/1n2B3/8/8 w - - 0 1)
Beale, John Lindsay
O'Keefe, John James
The Problemist, 1950
#2
6 + 4
| 3174 | The Two-move Chess Problem Tradition and Development | 1966 |
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.Sd6#
- 1...Rg2
- 2.Sd6#
- 1...Rg3
- 2.Sxg3#
- 2.Sd6#
- 1...Rg4
- 2.Sd6#
- 1...Rg5
- 2.Sd6#
- 1...Rxc6
- 2.Sg3#
- 1...Rd6
- 2.Sg3#
- 2.Sxd6#
- 1...Re6
- 2.Sg3#
- 1...Rf6
- 2.Sg3#
- 1...Rh6
- 2.Sg3#
- 1...Rg7
- 2.Sd6#
- 1...Rg8
- 2.Sd6#
- 1...Sa1
- 2.Sd4#
- 1...Sc1
- 2.Sd4#
- 1...Sd2
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sbc5
- 2.Sd4#
- 1...Sdc5
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sb6
- 2.Qe5#
- 1...Sf6
- 2.Sd6#
- 2.Qe5#
- 1...Sb8
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...Rg1
- Tries
- 1.Bd2?
- 1...Rxc6
- 2.Sg3#
- 1...Re6
- 2.Sg3#
- 1...Se5
- 2.Qxe5#
- 1...Rg1
- 2.Sd6#
- 1...Rg2
- 2.Sd6#
- 1...Rg3
- 2.Sxg3#
- 2.Sd6#
- 1...Rg4
- 2.Sd6#
- 1...Rg5
- 2.Sd6#
- 1...Rd6
- 2.Sg3#
- 2.Sxd6#
- 1...Rf6
- 2.Sg3#
- 1...Rh6
- 2.Sg3#
- 1...Rg7
- 2.Sd6#
- 1...Rg8
- 2.Sd6#
- 1...Sa1
- 2.Sd4#
- 1...Sc1
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sbc5
- 2.Sd4#
- 1...Sdc5
- 2.Qe5#
- 1...Sb6
- 2.Qe5#
- 1...Sf6
- 2.Sd6#
- 2.Qe5#
- 1...Sb8
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...Sxd2!
- 1...Rxc6
- 1.Qf7+?
- 1...Rf6
- 2.Sg3#
- 2.Sd6#
- 1...Sf6
- 2.Sd6#
- 1...Kxe4!
- 1...Rf6
- 1.Bd2?
- Keys
- 1.Sc5!
- 1...Rxc6
- 2.Qg5#
- 1...Sbxc5
- 2.Sd4#
- 1...Sdxc5
- 2.Qe5#
- 1...Rg1
- 2.Qe6#
- 1...Rg2
- 2.Qe6#
- 1...Rg3
- 2.Qe6#
- 1...Rg4
- 2.Qe6#
- 1...Rg5
- 2.Qxg5#
- 2.Qe6#
- 1...Rd6
- 2.Qg5#
- 1...Re6
- 2.Qg5#
- 2.Qxe6#
- 1...Rf6
- 2.Qe4#
- 1...Rh6
- 2.Qg5#
- 1...Rg7
- 2.Qe6#
- 1...Rg8
- 2.Qe6#
- 1...Sa1
- 2.Sd4#
- 1...Sc1
- 2.Sd4#
- 1...Sd2
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Se5
- 2.Qxe5#
- 1...Sb6
- 2.Qe5#
- 1...Sf6
- 2.Qe5#
- 2.Qe6#
- 1...Sb8
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...Rxc6
- 1.Sc5!
This is after
There are these versions: 59568
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(c);N_GUARD::S(B)
- R(c);N_GUARD,XS(D)::S(B)
- S(a);N_GUARD::S(D)
- S(a);N_GUARD::S(D),XS(a)
- S(d);N_GUARD::QAR1(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- Tries
- Try
- B(A);
- Vars
- R(c);N_GUARD,XS(D)::S(B)
- R(c);N_GUARD::S(B)
- S(d);N_GUARD::QAR1(F),XS(d)
- S(a);N_GUARD::S(D)
- S(a);N_GUARD::S(D),XS(a)
- S(d);N_GUARD::QAR1(F)
- Refutation
- S(a);XB(A)
- Try
- Q(F);CHECK
- Vars
- S(d);P_SPINS(d)::S(B)
- Refutation
- K(b);S_FLIGHT,XS(B)
- Try
- Actual
- S(B);
- Vars
- R(c);N_GUARD,XS(D)::QAR1(F)
- S(a);N_GUARD,XS(B)::S(D)
- S(d);N_GUARD,XS(B)::QAR1(F)
- R(c);N_GUARD::QAB1(F)
- R(c);N_GUARD::QAR1(F)
- R(c);SBLOCK::QAB1(F)
- S(a);N_GUARD::S(D)
- S(a);N_GUARD::S(D),XS(a)
- S(d);N_GUARD::QAR1(F),XS(d)
- S(d);N_GUARD::QAR1(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).