MESON Chess Problem Database
Problem Display
PID: 144635 (rr6/5BQ1/8/3R4/8/kPRN3p/8/K7 w - - 0 1)
Lewis, Sally
British Chess Magazine, 1995
#2
7 + 4
| 5454 | Near Snap | 2012 |
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.b4#
- 1...Ra5
- 2.Rxa5#
- 1...Ra4
- Tries
- 1.Rc1?
- threat
- 2.Qb2#
- 1...Kxb3+
- 2.Ra5#
- 1...Rxb3!
- threat
- 1.Rc2?
- threat
- 2.Qb2#
- 1...Rxb3
- 2.Ra2#
- 1...Kxb3+!
- threat
- 1.Rc6?
- threat
- 2.Qb2#
- 1...Kxb3+
- 2.Ra5#
- 1...Rxb3!
- threat
- 1.Rc7?
- threat
- 2.Qb2#
- 1...Kxb3+
- 2.Ra5#
- 1...Rxb3!
- threat
- 1.Qf8+?
- 1...Rb4
- 2.Qxb4#
- 1...Rxf8!
- 1...Rb4
- 1.Qg2?
- threat
- 2.Qa2#
- 2.Qb2#
- 1...Rxb3
- 2.Qa2#
- 1...hxg2!
- threat
- 1.Rc1?
- Keys
- 1.Rc8!
- threat
- 2.Qb2#
- 1...Kxb3+
- 2.Ra5#
- 1...Rxb3
- 2.Rxa8#
- threat
- 1.Rc8!
Anticipated by 52227(1932-1933), 96852(1945)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(c);SBLOCK::R(C)+P(B)
- R(c);N_GUARD::R(E),XR(c)
- Tries
- Try
- R(C);
- Threat
- QAB1(G)
- Vars
- K(a);CHECK,P-FLIGHT,XP(B)::B(F)+R(E)
- Refutation
- R(d);XP(B)
- Try
- R(C);
- Threat
- QAB1(G)
- Vars
- R(d);SBLOCK,XP(B)::R1(C)
- Refutation
- K(a);CHECK,P-FLIGHT,XP(B)
- Try
- R(C);
- Threat
- QAB1(G)
- Vars
- K(a);CHECK,P-FLIGHT,XP(B)::B(F)+R(E)
- Refutation
- R(d);XP(B)
- Try
- R(C);
- Threat
- QAB1(G)
- Vars
- K(a);CHECK,P-FLIGHT,XP(B)::B(F)+R(E)
- Refutation
- R(d);XP(B)
- Try
- Q(G);CHECK
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAB1(G),XR(d)
- Refutation
- R(d);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(d);P_SPINR(d),XP(B)::QAR1(G)
- Refutation
- P(b);XQ(G)
- Try
- Actual
- R(C);
- Threat
- QAB1(G)
- Vars
- K(a);CHECK,P-FLIGHT,XP(B)::B(F)+R(E)
- R(d);OGATE,SBLOCK,XP(B)::R(C),XR(c)
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).