MESON Chess Problem Database
Problem Display
PID: 185187 (1Bn3N1/1pP3P1/1p1k4/5Q2/1P3nB1/8/8/5K2 w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1930
(First published on Sun Sep 14 1930)
#2
8 + 5
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Kc6
- 2.Qd7#
- 1...Se2
- 2.Qe6#
- 1...Sg2
- 2.Qe6#
- 1...Sd3
- 2.Qe6#
- 1...Sh3
- 2.Qe6#
- 1...Sd5
- 2.Qe6#
- 1...Sh5
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Sg6
- 2.Qe6#
- 1...Sa7
- 2.c8Q#
- 2.c8R#
- 1...Se7
- 2.c8Q#
- 2.c8R#
- 1...b5
- 2.Qc5#
- 1...Kc6
- Tries
- 1.Sh6?
- 1...Kc6
- 2.Qd7#
- 1...Ke7
- 2.Qf8#
- 1...Se6
- 2.Qxe6#
- 1...Se2
- 2.Qe6#
- 1...Sg2
- 2.Qe6#
- 1...Sd3
- 2.Qe6#
- 1...Sh3
- 2.Qe6#
- 1...Sd5
- 2.Qe6#
- 1...Sh5
- 2.Qe6#
- 1...Sg6
- 2.Qe6#
- 1...Se7
- 2.c8Q#
- 2.c8R#
- 1...b5
- 2.Qc5#
- 1...Sa7!
- 1...Kc6
- 1.Bf3?
- 1...Sd5
- 2.Qxd5#
- 1...Se6
- 2.Qd5#
- 1...Sa7
- 2.c8Q#
- 2.c8S#
- 2.c8B#
- 2.c8R#
- 1...Se2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sd3
- 2.Qd5#
- 1...Sh3
- 2.Qd5#
- 1...Sh5
- 2.Qd5#
- 1...Sg6
- 2.Qd5#
- 1...Se7
- 2.c8Q#
- 2.c8S#
- 2.c8B#
- 2.c8R#
- 1...b5!
- 1...Sd5
- 1.Bh3?
- 1...Kc6
- 2.Qd7#
- 1...Se6
- 2.Qxe6#
- 1...Sa7
- 2.c8Q#
- 2.c8R#
- 1...Se2
- 2.Qe6#
- 1...Sg2
- 2.Qe6#
- 1...Sd3
- 2.Qe6#
- 1...Sd5
- 2.Qe6#
- 1...Sh5
- 2.Qe6#
- 1...Sg6
- 2.Qe6#
- 1...Se7
- 2.c8Q#
- 2.c8R#
- 1...b5
- 2.Qc5#
- 1...Sxh3!
- 1...Kc6
- 1.Qe4?
- 1...Sd5
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Sa7
- 2.c8Q#
- 2.c8S#
- 2.c8B#
- 2.c8R#
- 1...Se2
- 2.Qe6#
- 1...Sg2
- 2.Qe6#
- 1...Sd3
- 2.Qe6#
- 1...Sh3
- 2.Qe6#
- 1...Sh5
- 2.Qe6#
- 1...Sg6
- 2.Qe6#
- 1...Se7
- 2.c8Q#
- 2.c8S#
- 2.c8B#
- 2.c8R#
- 1...b5!
- 1...Sd5
- 1.Qe5+?
- 1...Kc6
- 2.b5#
- 1...Kxe5!
- 1...Kc6
- 1.Qf6+?
- 1...Se6
- 2.Qxe6#
- 1...Kd5!
- 1...Se6
- 1.Sh6?
- Keys
- 1.Se7!
- 1...Kxe7
- 2.Qf8#
- 1...Sxe7
- 2.c8Q#
- 2.c8R#
- 1...Se6
- 2.Qxe6#
- 1...Sa7
- 2.c8S#
- 1...Se2
- 2.Qe6#
- 2.Qf6#
- 1...Sg2
- 2.Qe6#
- 2.Qf6#
- 1...Sd3
- 2.Qe6#
- 2.Qf6#
- 1...Sh3
- 2.Qe6#
- 2.Qf6#
- 1...Sd5
- 2.Qe6#
- 1...Sh5
- 2.Qe6#
- 1...Sg6
- 2.Qe6#
- 2.Qf6#
- 1...b5
- 2.Qc5#
- 1...Kxe7
- 1.Se7!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- K(c);P-FLIGHT::QAB1(D)
- S(a);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XS(a)
- S(e);OGATE::P=Q
- P(b);N_GUARD::QAB1(D)
- Tries
- Try
- S(H);
- Vars
- K(c);P-FLIGHT::QAB1(D)
- K(c);S_FLIGHT::QAB1(D)
- S(a);N_GUARD::QAR1(D),XS(a)
- S(a);N_GUARD::QAR1(D)
- S(e);OGATE,SBLOCK::P=Q
- P(b);N_GUARD::QAB1(D)
- Refutation
- S(e);
- Try
- B(C);
- Vars
- S(a);N_GUARD::QAR1(D),XS(a)
- S(a);N_GUARD::QAR1(D)
- Refutation
- P(b);
- Try
- B(C);
- Vars
- K(c);P-FLIGHT::QAB1(D)
- S(a);N_GUARD::QAR1(D),XS(a)
- S(e);OGATE::P=Q
- S(a);N_GUARD::QAR1(D)
- P(b);N_GUARD::QAB1(D)
- Refutation
- S(a);XB(C)
- Try
- Q(D);
- Vars
- S(a);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XS(a)
- Refutation
- P(b);
- Try
- Q(D);CHECK
- Vars
- K(c);P-FLIGHT::P(B)
- Refutation
- K(c);S_FLIGHT,XQ(D)
- Try
- Q(D);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAR1(D),XS(a)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- S(H);
- Vars
- K(c);OGATEB,S_FLIGHT,XS(H)::QAB1(D)
- S(e);OGATE,SBLOCK,XS(H)::P=Q
- S(a);N_GUARD::QAR1(D),XS(a)
- S(e);OGATE::P=S
- S(a);N_GUARD::QAR1(D)
- P(b);N_GUARD::QAB1(D)
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).