MESON Chess Problem Database
Problem Display
PID: 21277 (8/4p3/p2pP3/rNB2Q2/r1k5/p7/K7/1R6 w - - 0 1)
Mansfield, Comins
Chess Amateur (The), 1918
#2
6 + 7
| 2681 | All Change Here! | 1919 |
| 3174 | The Two-move Chess Problem Tradition and Development | 1966 |
| 3098 | FIDE Album (1914-1944) (I) | 1971 |
| 3202 | Complete Mansfield/I | 1996 |
| 3713 | Snap | 2001 |
SOLUTION
- SOUND
- Sets
- 1...Rb4
- 2.Rxb4#
- 1...Rxb5
- 2.Rc1#
- 1...axb5
- 2.Rc1#
- 1...dxc5
- 2.Qe4#
- 1...d5
- 2.Qc2#
- 1...Rb4
- Tries
- 1.Sxa3+?
- 1...Kc3
- 2.Qc2#
- 1...Rxa3+!
- 1...Kc3
- 1.Rb2?
- 1...Rxb5
- 2.Rc2#
- 1...axb5
- 2.Rc2#
- 1...dxc5
- 2.Qe4#
- 1...Rb4
- 2.Rxb4#
- 1...d5
- 2.Qc2#
- 1...axb2+!
- 1...Rxb5
- 1.Sxa3+?
- Keys
- 1.Bb4!
- 1...Rxb4
- 2.Rc1#
- 1...Rxb5
- 2.Qe4#
- 1...axb5
- 2.Qe4#
- 1...d5
- 2.Qf1#
- 1...Rxb4
- 1.Bb4!
This anticipates 16547(1941)
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(b);N_GUARD::R1(A),XR(b)
- R(d);SBLOCK,XS(C)::R(A)
- P(e);SBLOCK,XS(C)::R(A)
- P(f);SBLOCK,XB(D)::QAR2(E)
- P(f);SBLOCK::QAR2(E)
- Tries
- Try
- S(C);CHECK,P_SPINS(C),XP(a)
- Vars
- K(c);P-FLIGHT::QAR1(E)
- Refutation
- R(b);CHECK,XS(C)
- Try
- R(A);
- Vars
- R(d);SBLOCK,XS(C)::R(A)
- P(e);SBLOCK,XS(C)::R(A)
- P(f);SBLOCK,XB(D)::QAR2(E)
- R(b);N_GUARD::R1(A),XR(b)
- P(f);SBLOCK::QAR2(E)
- Refutation
- P(a);CHECK,XR(A)
- Try
- Actual
- B(D);
- Vars
- R(b);SBLOCK,XB(D)::R(A)
- R(d);SBLOCK,XS(C)::QAR2(E)
- P(e);SBLOCK,XS(C)::QAR2(E)
- P(f);SBLOCK::QAB(E)
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).