MESON Chess Problem Database
Problem Display
PID: 153376 (K3N3/8/p1k1P3/1p1p4/3B4/3p4/1R6/3B4 w - - 0 1)
Harley, Brian
The Observer, 1940
(First published on Sun Sep 1 1940)
#2
6 + 5
| 15290 | Harley Scrapbook | 2014 |
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...d2
- 2.Rc2#
- 1...b4
- 2.Ba4#
- 1...d2
- Tries
- 1.Ka7?
- 1...b4
- 2.Ba4#
- 1...d2
- 2.Rc2#
- 1...a5!
- 1...b4
- 1.Kb8?
- 1...b4
- 2.Ba4#
- 1...d2
- 2.Rc2#
- 1...a5!
- 1...b4
- 1.Bb3?
- 1...b4
- 2.Ba4#
- 1...d2
- 2.Rc2#
- 1...a5!
- 1...b4
- 1.Ba7?
- 1...b4
- 2.Ba4#
- 1...d4
- 2.Bf3#
- 1...d2
- 2.Rc2#
- 1...a5!
- 1...b4
- 1.Rb1?
- threat
- 2.Rc1#
- 1...b4
- 2.Ba4#
- 1...d2!
- threat
- 1.Ra2?
- threat
- 2.Rxa6#
- 1...b4
- 2.Ba4#
- 1...a5!
- threat
- 1.Rd2?
- 1...b4
- 2.Ba4#
- 1...a5!
- 1...b4
- 1.Ka7?
- Keys
- 1.Ba4!
- 1...bxa4
- 2.Rb6#
- 1...a5
- 2.Bxb5#
- 1...d2
- 2.Rc2#
- 1...bxa4
- 1.Ba4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- P(a);N_GUARD::R(B)
- P(b);OGATEB::B(A)
- Tries
- Try
- K(E);P-FLIGHT
- Vars
- P(b);OGATEB::B(A)
- P(a);N_GUARD::R(B)
- Refutation
- P(d);
- Try
- K(E);P-FLIGHT
- Vars
- P(b);OGATEB::B(A)
- P(a);N_GUARD::R(B)
- Refutation
- P(d);
- Try
- B(A);
- Vars
- P(b);OGATEB::B(A)
- P(a);N_GUARD::R(B)
- Refutation
- P(d);
- Try
- B(C);
- Vars
- P(b);OGATEB::B(A)
- P(c);OGATEB::B(A)
- P(a);N_GUARD::R(B)
- Refutation
- P(d);
- Try
- R(B);
- Threat
- R(B)
- Vars
- P(b);OGATEB::B(A)
- Refutation
- P(a);
- Try
- R(B);
- Threat
- R(B),XP(d)
- Vars
- P(b);OGATEB::B(A)
- Refutation
- P(d);
- Try
- R(B);
- Vars
- P(b);OGATEB::B(A)
- Refutation
- P(d);
- Try
- Actual
- B(A);P_PINP(b)
- Vars
- P(b);N_SPINP(b),OGATE,XB(A)::R1(B)
- P(d);N_GUARD::B(A),XP(b)
- P(a);N_GUARD::R(B)
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).