MESON Chess Problem Database
Problem Display
PID: 201038 (8/8/4Np2/2p1p3/1pQ5/1K2pk2/8/5B1N w - - 0 1)
Rendall, JL
The Observer, 1949
(First published on Sun May 29 1949)
#2
5 + 6
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...e2
- 2.Qxe2#
- 1...e4
- 2.Qe2#
- 1...f5
- 2.Sg5#
- 1...e2
- Tries
- 1.Ka2?
- 1...e2
- 2.Qxe2#
- 1...e4
- 2.Qe2#
- 1...f5
- 2.Sg5#
- 1...b3+!
- 1...e2
- 1.Kb2?
- 1...e2
- 2.Qxe2#
- 1...e4
- 2.Qe2#
- 1...f5
- 2.Sg5#
- 1...b3!
- 1...e2
- 1.Kc2?
- 1...e2
- 2.Qxe2#
- 1...e4
- 2.Qe2#
- 1...f5
- 2.Sg5#
- 1...b3+!
- 1...e2
- 1.Ka4?
- 1...e2
- 2.Qxe2#
- 1...e4
- 2.Qe2#
- 1...f5
- 2.Sg5#
- 1...b3!
- 1...e2
- 1.Sxc5?
- threat
- 2.Qe4#
- 1...e4
- 2.Qxe4#
- 1...f5!
- threat
- 1.Qd5+?
- 1...e4
- 2.Qf5#
- 2.Qh5#
- 1...Kg4!
- 1...e4
- 1.Ka2?
- Keys
- 1.Bh3!
- threat
- 2.Qg4#
- 1...e2
- 2.Qd3#
- 1...e4
- 2.Qf1#
- 1...f5
- 2.Sg5#
- threat
- 1.Bh3!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- P(a);::QAB1(D),XP(a)
- P(e);SBLOCK::QAB1(D)
- P(f);N_GUARD::S(E)
- Tries
- Try
- K(C);S_FLIGHT
- Vars
- P(a);::QAB1(D),XP(a)
- P(e);SBLOCK::QAB1(D)
- P(f);N_GUARD::S(E)
- Refutation
- P(c);CHECK
- Try
- K(C);P-FLIGHT
- Vars
- P(a);::QAB1(D),XP(a)
- P(e);SBLOCK::QAB1(D)
- P(f);N_GUARD::S(E)
- Refutation
- P(c);
- Try
- K(C);S_FLIGHT
- Vars
- P(a);::QAB1(D),XP(a)
- P(e);SBLOCK::QAB1(D)
- P(f);N_GUARD::S(E)
- Refutation
- P(c);CHECK
- Try
- K(C);S_FLIGHT
- Vars
- P(a);::QAB1(D),XP(a)
- P(e);SBLOCK::QAB1(D)
- P(f);N_GUARD::S(E)
- Refutation
- P(c);
- Try
- S(E);XP(d)
- Threat
- QAB1(D)
- Vars
- P(e);::QAB1(D),XP(e)
- Refutation
- P(f);
- Try
- Q(D);CHECK
- Refutation
- K(b);S_FLIGHT
- Try
- Actual
- B(A);
- Threat
- QAB1(D)
- Vars
- P(a);OGATEB::QAR2(D)
- P(e);SBLOCK::QAR2(D)
- P(f);N_GUARD::S(E)
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).