MESON Chess Problem Database
Problem Display
PID: 44704 (8/1N6/RpkN4/2p3p1/6Qp/6pB/6K1/8 w - - 0 1)
Lytton, Cedric C (was Sells, CCL)
The Problemist, 1955
#2
6 + 6
| 136 | Problem Observer | 2002 |
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...Kd5
- Tries
- 1.Kf1?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...g2+!
- 1...Kd5
- 1.Kg1?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...g2!
- 1...Kd5
- 1.Kh1?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...g2+!
- 1...Kd5
- 1.Kf3?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...g2!
- 1...Kd5
- 1.Sf7?
- threat
- 2.Qd7#
- 1...Kb5
- 2.Qa4#
- 1...Kxb7
- 2.Qc8#
- 1...Kc7
- 2.Qc8#
- 1...Kd5!
- threat
- 1.Se8?
- threat
- 2.Qd7#
- 1...Kb5
- 2.Qa4#
- 1...Kxb7
- 2.Qc8#
- 1...Kd5!
- threat
- 1.Ra1?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...b5!
- 1...Kd5
- 1.Ra2?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...b5!
- 1...Kd5
- 1.Ra3?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...b5!
- 1...Kd5
- 1.Ra4?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...b5!
- 1...Kd5
- 1.Ra7?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...b5!
- 1...Kd5
- 1.Ra8?
- 1...Kd5
- 2.Qe4#
- 1...Kc7
- 2.Rc8#
- 2.Qd7#
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...b5!
- 1...Kd5
- 1.Qf5?
- threat
- 2.Qxc5#
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qc5#
- 1...g4!
- threat
- 1.Qe6?
- 1...Kc7
- 2.Qc8#
- 1...c4
- 2.Qxc4#
- 1...g4!
- 1...Kc7
- 1.Qa4+?
- 1...Kd5
- 2.Qe4#
- 1...Kc7!
- 1...Kd5
- 1.Qxg5?
- threat
- 2.Qxc5#
- 1...c4
- 2.Qc5#
- 1...Kc7!
- threat
- 1.Kf1?
- Keys
- 1.Sb5!
- threat
- 2.Qd7#
- 1...Kxb5
- 2.Qa4#
- 1...Kd5
- 2.Qe6#
- 1...Kxb7
- 2.Qc8#
- threat
- 1.Sb5!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(a);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(a);
- Try
- K(A);S_FLIGHT
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(a);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(a);
- Try
- S(E);
- Threat
- QAB1(C)
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),S_FLIGHT,XS(F)::QAB1(C)
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT
- Try
- S(E);
- Threat
- QAB1(C)
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),S_FLIGHT,XS(F)::QAB1(C)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT
- Try
- R(D);N_PINP(e)
- Vars
- K(f);S_FLIGHT::QAB1(C)
- K(f);P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(e);
- Try
- R(D);N_PINP(e)
- Vars
- K(f);S_FLIGHT::QAB1(C)
- K(f);P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(e);
- Try
- R(D);N_PINP(e)
- Vars
- K(f);S_FLIGHT::QAB1(C)
- K(f);P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(e);
- Try
- R(D);N_PINP(e)
- Vars
- K(f);S_FLIGHT::QAB1(C)
- K(f);P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(e);
- Try
- R(D);N_PINP(e)
- Vars
- K(f);S_FLIGHT::QAB1(C)
- K(f);P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(e);
- Try
- R(D);N_PINP(e)
- Vars
- K(f);S_FLIGHT::QAB1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(e);
- Try
- Q(C);
- Threat
- QAR1(C),XP(c)
- Vars
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- P(c);::QAR1(C)
- Refutation
- P(d);
- Try
- Q(C);
- Vars
- K(f);N_SPINP(e),P-FLIGHT::QAR1(C)
- P(c);OGATEB::QAR2(C),XP(c)
- Refutation
- P(d);
- Try
- Q(C);CHECK
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- Q(C);XP(d)
- Threat
- QAR1(C),XP(c)
- Vars
- P(c);::QAR1(C)
- Refutation
- K(f);N_SPINP(e),P-FLIGHT
- Try
- Actual
- S(E);
- Threat
- QAB1(C)
- Vars
- K(f);N_SPINP(e),OGATEB,S_FLIGHT,XS(E)::QAB1(C)
- K(f);N_SPINP(e),S_FLIGHT::QAB1(C)
- K(f);N_SPINP(e),S_FLIGHT,XS(F)::QAB1(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).