MESON Chess Problem Database
Problem Display
PID: 154056 (2k5/2qNR3/2N5/8/8/1Q6/5p2/5K2 w - - 0 1)
Harley, Brian
The Observer, 1953
(First published on Sun Sep 6 1953)
#2
5 + 3
| 15290 | Harley Scrapbook | 2015 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qh2
- 2.Sb6#
- 1...Qg3
- 2.Sb6#
- 1...Qf4
- 2.Sb6#
- 1...Qa5
- 2.Qb8#
- 1...Qe5
- 2.Sb6#
- 1...Qb6
- 2.Sxb6#
- 1...Qd6
- 2.Sb6#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Qb8#
- 1...Qxc6
- 2.Qb8#
- 1...Qxd7
- 2.Qb8#
- 1...Qh2
- Tries
- 1.Sc5?
- 1...Qxe7
- 2.Qb8#
- 1...Qd7
- 2.Qb8#
- 1...Qh2
- 2.Qe6#
- 2.Qg8#
- 2.Qb7#
- 1...Qg3
- 2.Qe6#
- 2.Qb7#
- 1...Qf4
- 2.Qe6#
- 2.Qb7#
- 1...Qa5
- 2.Qe6#
- 2.Qh3#
- 2.Qb7#
- 2.Qb8#
- 1...Qe5
- 2.Qg8#
- 2.Qb7#
- 1...Qb6
- 2.Qe6#
- 2.Qh3#
- 1...Qd6
- 2.Qb7#
- 1...Qb8
- 2.Qe6#
- 2.Qg8#
- 2.Qh3#
- 2.Qxb8#
- 1...Qd8
- 2.Sa7#
- 2.Qb7#
- 2.Qb8#
- 1...Qa7
- 2.Qg8#
- 1...Qb7
- 2.Qg8#
- 2.Qxb7#
- 1...Qxc6!
- 1...Qxe7
- 1.Sde5?
- 1...Qxe5
- 2.Qg8#
- 2.Qb7#
- 1...Qxe7
- 2.Qb8#
- 1...Qd7
- 2.Qb8#
- 1...Qa5
- 2.Qe6#
- 2.Qh3#
- 2.Qb7#
- 2.Qb8#
- 1...Qb6
- 2.Qe6#
- 2.Qh3#
- 1...Qd6
- 2.Qb7#
- 1...Qb8
- 2.Qe6#
- 2.Qg8#
- 2.Qh3#
- 2.Qxb8#
- 1...Qd8
- 2.Sa7#
- 2.Qb7#
- 2.Qb8#
- 1...Qa7
- 2.Qg8#
- 1...Qb7
- 2.Qg8#
- 2.Qxb7#
- 1...Qxc6!
- 1...Qxe5
- 1.Sb6+?
- 1...Qxb6
- 2.Qe6#
- 2.Qh3#
- 1...Kb7!
- 1...Qxb6
- 1.Sf6?
- 1...Qxe7
- 2.Qb8#
- 1...Qd7
- 2.Qb8#
- 1...Qh2
- 2.Qe6#
- 2.Qg8#
- 2.Qb7#
- 1...Qg3
- 2.Qe6#
- 2.Qb7#
- 1...Qf4
- 2.Qe6#
- 2.Qg8#
- 2.Qb7#
- 1...Qa5
- 2.Qe6#
- 2.Qb7#
- 2.Qb8#
- 1...Qe5
- 2.Qg8#
- 2.Qb7#
- 1...Qb6
- 2.Qe6#
- 2.Qh3#
- 1...Qd6
- 2.Qb7#
- 1...Qb8
- 2.Qe6#
- 2.Qg8#
- 2.Qh3#
- 2.Qxb8#
- 1...Qd8
- 2.Sa7#
- 2.Qb7#
- 2.Qb8#
- 1...Qa7
- 2.Qg8#
- 1...Qb7
- 2.Qg8#
- 2.Qxb7#
- 1...Qxc6!
- 1...Qxe7
- 1.Re8+?
- 1...Kxd7
- 2.Qe6#
- 1...Qd8!
- 1...Kxd7
- 1.Qg8+?
- 1...Qd8
- 2.Sb6#
- 1...Kb7!
- 1...Qd8
- 1.Sc5?
- Keys
- 1.Qb6!
- 1...Qxb6
- 2.Sxb6#
- 1...Qxc6
- 2.Qb8#
- 1...Qxd7
- 2.Qb8#
- 1...Qa7
- 2.Sxa7#
- 1...Qh2
- 2.Sa7#
- 1...Qg3
- 2.Sa7#
- 1...Qf4
- 2.Sa7#
- 1...Qe5
- 2.Sa7#
- 1...Qd6
- 2.Sa7#
- 1...Qb8
- 2.Qxb8#
- 1...Qd8
- 2.Sa7#
- 2.Qb8#
- 1...Qb7
- 2.Qd8#
- 1...Qxb6
- 1.Qb6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(b);N_GUARD::S(D)
- Q(b);N_GUARD::QAR1(B)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- Q(b);N_GUARD,XS(C)::QAR1(B)
- Q(b);N_GUARD,XS(D)::QAR1(B)
- Tries
- Try
- S(D);
- Vars
- Q(b);N_GUARD,XR(E)::QAR1(B)
- Q(b);N_GUARD::QAR1(B)
- Q(b);N_GUARD::QAB1(B)
- Q(b);N_GUARD::QAR(B)
- Refutation
- Q(b);XS(C)
- Try
- S(D);
- Vars
- Q(b);N_GUARD,XR(E)::QAR1(B)
- Q(b);N_GUARD::QAR1(B)
- Q(b);N_GUARD::QAB1(B)
- Q(b);N_GUARD::QAR(B)
- Refutation
- Q(b);XS(C)
- Try
- S(D);CHECK
- Refutation
- K(c);P_SPINQ(b),S_FLIGHT
- Try
- S(D);
- Vars
- Q(b);N_GUARD,XR(E)::QAR1(B)
- Q(b);N_GUARD::QAR1(B)
- Q(b);N_GUARD::QAB1(B)
- Q(b);N_GUARD::QAR(B)
- Refutation
- Q(b);XS(C)
- Try
- R(E);CHECK
- Vars
- K(c);S_FLIGHT,XS(D)::QAB1(B)
- Refutation
- Q(b);P_SPINQ(b)
- Try
- Q(B);CHECK
- Vars
- Q(b);P_SPINQ(b)::S(D)
- Refutation
- K(c);S_FLIGHT
- Try
- Actual
- Q(B);
- Vars
- Q(b);XQ(B)::S(D),XQ(b)
- Q(b);N_GUARD,XS(C)::QAR1(B)
- Q(b);N_GUARD,XS(D)::QAR1(B)
- Q(b);N_GUARD::S(C),XQ(b)
- Q(b);N_GUARD::S(C)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- Q(b);OGATE,SBLOCK::QAR1(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).