MESON Chess Problem Database
Problem Display
PID: 246587 (rb6/8/8/8/3B4/1Q6/1PK5/k7 w - - 0 1)
Rice, John Michael
The Problemist, 1989
#2
4 + 3
| 3713 | Snap | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Qxa3#
- 2.bxa3#
- 1...Ra4
- 2.Qxa4#
- 1...Ba7
- 2.Qa4#
- 2.Qa3#
- 1...Ra3
- Tries
- 1.Qc4?
- threat
- 2.b4#
- 1...Ra2
- 2.Qf1#
- 1...Ra3
- 2.bxa3#
- 1...Ba7
- 2.Qa6#
- 2.Qa4#
- 1...Be5!
- threat
- 1.Qe6?
- threat
- 2.b4#
- 1...Ra2
- 2.Qe1#
- 1...Ra3
- 2.bxa3#
- 1...Ba7
- 2.Qa6#
- 1...Be5!
- threat
- 1.Qg8?
- threat
- 2.b4#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.bxa3#
- 1...Be5
- 2.Qxa8#
- 1...Ba7!
- threat
- 1.Qc4?
- Keys
- 1.Qd5!
- threat
- 2.b4#
- 1...Ra2
- 2.Qh1#
- 1...Ra3
- 2.bxa3#
- 1...Be5
- 2.Qxa8#
- 1...Ba7
- 2.Qa5#
- threat
- 1.Qd5!
Anticipated by 6464(1929)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- R(b);N_GUARD::QAR(C),XR(b)
- Tries
- Try
- Q(C);
- Threat
- B(D)+P(A)
- Vars
- R(b);P_PINP(A),SBLOCK::QAR(C)
- R(b);OGATE::B(D)+P(A),XR(b)
- Refutation
- B(c);
- Try
- Q(C);
- Threat
- B(D)+P(A)
- Vars
- R(b);P_PINP(A),SBLOCK::QAR(C)
- R(b);OGATE::B(D)+P(A),XR(b)
- B(c);S_CUTR(b)::QAR(C)
- Refutation
- B(c);
- Try
- Q(C);
- Threat
- B(D)+P(A)
- Vars
- R(b);P_PINP(A),SBLOCK::QAR(C)
- R(b);OGATE::B(D)+P(A),XR(b)
- B(c);OGATE::QAB(C),XR(b)
- Refutation
- B(c);
- Try
- Actual
- Q(C);
- Threat
- B(D)+P(A)
- Vars
- R(b);P_PINP(A),SBLOCK::QAB1(C)
- R(b);OGATE::B(D)+P(A),XR(b)
- B(c);N_GUARD::QAB(C),XR(b)
- B(c);S_CUTR(b)::QAR(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).