MESON Chess Problem Database
Problem Display
PID: 179261 (4RNK1/p3bP2/p5p1/Q1N1knR1/1P6/1P6/5P1p/7B w - - 0 1)
Hoffmann, Peter
Die Welt, 1979
#2
11 + 7
| 136 | Problem Observer | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Qa1#
- 1...Kf4
- 2.Sce6#
- 1...Kd6
- 2.Sb7#
- 1...Kf6
- 2.Se4#
- 1...Kd4
- Tries
- 1.Kh7?
- 1...Kd4
- 2.Qa1#
- 1...Kf4
- 2.Sce6#
- 1...Kd6
- 2.Sb7#
- 1...Kf6!
- 1...Kd4
- 1.Kh8?
- 1...Kd4
- 2.Qa1#
- 1...Kf4
- 2.Sce6#
- 1...Kd6
- 2.Sb7#
- 1...Kf6!
- 1...Kd4
- 1.Sd3+?
- 1...Kd6
- 2.Qc5#
- 2.Qe5#
- 1...Kf6
- 2.Rxg6#
- 1...Kd4!
- 1...Kd6
- 1.Se4+?
- 1...Kf4
- 2.Se6#
- 2.Sxg6#
- 1...Kd4!
- 1...Kf4
- 1.Sxa6+?
- 1...Kf4
- 2.Se6#
- 1...Kd6
- 2.Qc7#
- 2.Qc5#
- 2.Qd5#
- 1...Kf6
- 2.Rxg6#
- 1...Kd4!
- 1...Kf4
- 1.Sce6+?
- 1...Kd6
- 2.Qc7#
- 2.Qc5#
- 2.Qd5#
- 1...Kf6
- 2.Rxg6#
- 1...Bc5!
- 1...Kd6
- 1.Sb7+?
- 1...Kf4
- 2.Se6#
- 1...Kf6
- 2.Rxg6#
- 1...Kd4!
- 1...Kf4
- 1.Scd7+?
- 1...Kf4
- 2.Se6#
- 1...Kd6
- 2.Qc5#
- 2.Qe5#
- 1...Kd4!
- 1...Kf4
- 1.Sfd7+?
- 1...Kd4
- 2.Qa1#
- 1...Kf4
- 2.Se6#
- 1...Kd6!
- 1...Kd4
- 1.Sh7?
- 1...Kd4
- 2.Qa1#
- 1...Kf4
- 2.Sd3#
- 2.Se6#
- 1...Kd6!
- 1...Kd4
- 1.Rxe7+?
- 1...Kd4
- 2.Qa1#
- 1...Kf4
- 2.Sce6#
- 1...Kd6
- 2.Re6#
- 2.Qc7#
- 2.Qd8#
- 1...Kf6!
- 1...Kd4
- 1.Qc7+?
- 1...Kf6
- 2.Se4#
- 2.Sh7#
- 2.Rxg6#
- 1...Kd4!
- 1...Kf6
- 1.Qa1+?
- 1...Kf4
- 2.Sce6#
- 2.Sfe6#
- 1...Kd6!
- 1...Kf4
- 1.Qxa6?
- 1...Kd4
- 2.Qa1#
- 1...Kf4!
- 1...Kd4
- 1.Kh7?
- Keys
- 1.Sa4+!
- 1...Kd4
- 2.Qd5#
- 1...Kf4
- 2.Se6#
- 1...Kd6
- 2.Qc5#
- 1...Kf6
- 2.Rxg6#
- 1...Kd4
- 1.Sa4+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAB(E)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(F)
- Tries
- Try
- K(K);S_FLIGHT
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAB(E)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(F)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- K(K);P-FLIGHT
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAB(E)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(F)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- S(F);CHECK
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::R1(G),XP(e)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- S(F);CHECK
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- S(F);CHECK,XP(d)
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(J)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::R1(G),XP(e)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- S(F);CHECK,N_PINB(g)
- Vars
- K(b);N_SPINS(c),S_FLIGHT::R1(G),XP(e)
- Refutation
- B(g);P_SPINB(g)
- Try
- S(F);CHECK
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(J)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::R1(G),XP(e)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- S(F);CHECK
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(J)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- S(J);CHECK
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAB(E)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(F)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- S(J);
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAB(E)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- R(I);CHECK,XB(g)
- Vars
- K(b);N_SPINS(c),S_FLIGHT::QAB(E)
- K(b);N_SPINS(c),S_FLIGHT::S(F)
- Refutation
- K(b);N_SPINS(c),S_FLIGHT
- Try
- Q(E);CHECK
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- Q(E);CHECK
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- Q(E);XP(d)
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAB(E)
- Refutation
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT
- Try
- Actual
- S(F);CHECK
- Vars
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAR1(E)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::S(J)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::QAB1(E)
- K(b);N_SPINB(g),N_SPINS(c),S_FLIGHT::R1(G),XP(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).