MESON Chess Problem Database
Problem Display
PID: 51149 (4K3/p3P1p1/k7/1R3p1p/4BrRQ/2N5/8/6rb w - - 0 1)
Allison, Christopher John
Manchester Guardian, 1951
#2
7 + 8
| 15148 | Sadier Collection | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Rg6#
- 1...Rb1
- 2.Rg6#
- 1...Rc1
- 2.Rg6#
- 1...Re1
- 2.Rg6#
- 1...Rgf1
- 2.Rg6#
- 1...Rg2
- 2.Bb7#
- 1...Rf3
- 2.Bb7#
- 1...Bg2
- 2.Rg6#
- 1...g6
- 2.Qf6#
- 1...Ra1
- Tries
- 1.Rxg1?
- threat
- 2.Ra1#
- 2.Rg6#
- 1...Bxe4
- 2.Ra1#
- 1...fxe4
- 2.Ra1#
- 1...Rf1
- 2.Rg6#
- 1...Rf2
- 2.Rg6#
- 1...Rg4
- 2.Ra1#
- 1...Bg2
- 2.Ra1#
- 1...g5
- 2.Ra1#
- 1...g6
- 2.Ra1#
- 2.Rxg6#
- 2.Qf6#
- 1...Rxe4!
- threat
- 1.Rxg1?
- Keys
- 1.Qh2!
- threat
- 2.Qa2#
- 1...Rxe4
- 2.Qd6#
- 1...Ra1
- 2.Rg6#
- 1...Rg2
- 2.Bb7#
- 1...Rf2
- 2.Qd6#
- 1...Bg2
- 2.Rg6#
- threat
- 1.Qh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- R(a);N_GUARD::R(C)
- R(a);S_CUTB(b)::B(B)
- R(c);S_CUTB(b)::B(B)
- B(b);S_CUTR(a)::R(C)
- P(h);N_GUARD::QAR(D)
- Tries
- Try
- R(C);XR(a)
- Threat
- DUALS(2)
- Vars
- B(b);XB(B)::R(C)
- P(d);XB(B)::R(C)
- R(c);::R(C)
- B(b);::R(C)
- P(h);::R(C)
- Refutation
- R(c);P_PINP(F),XB(B)
- Try
- Actual
- Q(D);
- Threat
- QAR(D)
- Vars
- R(c);OGATE,P_PINP(F),XB(B)::QAR(D)
- R(a);N_GUARD::R(C)
- R(a);S_CUTB(b)::B(B)
- R(c);OGATE::QAR(D)
- B(b);S_CUTR(a)::R(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).