MESON Chess Problem Database
Problem Display
PID: 17750 (4R2n/2Np1kpQ/5p2/4P3/7p/7K/8/8 w - - 0 1)
Knoppel, Jan Heribert
Eskilstuna Kuriren, 1949
#2
5 + 6
| 3680 | Jan Knoppel Udvalgte Skakproblemer | 1955 |
| 3310 | 2345 Chess Problems | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Sg6
- 2.Qg8#
- 1...fxe5
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...Sg6
- Tries
- 1.Kg2?
- 1...fxe5
- 2.Qf5#
- 1...Sg6
- 2.Qg8#
- 1...f5
- 2.Qxf5#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...h3+!
- 1...fxe5
- 1.Kh2?
- 1...fxe5
- 2.Qf5#
- 1...Sg6
- 2.Qg8#
- 1...f5
- 2.Qxf5#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...h3!
- 1...fxe5
- 1.Kg4?
- 1...f5+
- 2.Qxf5#
- 1...fxe5
- 2.Qf5#
- 1...Sg6
- 2.Qg8#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...h3!
- 1...f5+
- 1.Kxh4?
- 1...fxe5
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...Sg6+!
- 1...fxe5
- 1.Re7+?
- 1...Kf8
- 2.Qxg7#
- 1...Kxe7!
- 1...Kf8
- 1.Qe4?
- 1...fxe5
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...g5
- 2.Qh7#
- 1...Sg6
- 2.Qd5#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...g6!
- 1...fxe5
- 1.Qf5?
- 1...g5
- 2.Qh7#
- 2.Qxf6#
- 1...g6
- 2.Qxd7#
- 2.Qxf6#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...Sg6!
- 1...g5
- 1.Qh5+?
- 1...g6
- 2.Qh7#
- 1...Sg6!
- 1...g6
- 1.Kg2?
- Keys
- 1.Qd3!
- 1...fxe5
- 2.Qf5#
- 1...f5
- 2.Qxf5#
- 1...g5
- 2.Qh7#
- 1...g6
- 2.Qxd7#
- 1...Sg6
- 2.Qd5#
- 1...d5
- 2.e6#
- 1...d6
- 2.e6#
- 1...fxe5
- 1.Qd3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(f);SBLOCK::QAB1(D)
- P(b);OGATEB,XP(B)::QAR2(D)
- P(b);OGATEB::QAR2(D),XP(b)
- P(c);N_GUARD::P(B)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- P(b);OGATEB,XP(B)::QAR2(D)
- S(f);SBLOCK::QAB1(D)
- P(b);OGATEB::QAR2(D),XP(b)
- P(c);N_GUARD::P(B)
- Refutation
- P(a);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- P(b);OGATEB,XP(B)::QAR2(D)
- S(f);SBLOCK::QAB1(D)
- P(b);OGATEB::QAR2(D),XP(b)
- P(c);N_GUARD::P(B)
- Refutation
- P(a);
- Try
- K(A);S_FLIGHT
- Vars
- P(b);CHECK,OGATEB::QAR2(D),XP(b)
- P(b);OGATEB,XP(B)::QAR2(D)
- S(f);SBLOCK::QAB1(D)
- P(c);N_GUARD::P(B)
- Refutation
- P(a);
- Try
- K(A);P-FLIGHT,XP(a)
- Vars
- P(b);OGATEB,XP(B)::QAR2(D)
- P(b);OGATEB::QAR2(D),XP(b)
- P(c);N_GUARD::P(B)
- Refutation
- S(f);CHECK
- Try
- R(E);CHECK
- Vars
- K(d);N_SPINP(e),P-FLIGHT::QAB1(D),XP(e)
- Refutation
- K(d);P-FLIGHT,XR(E)
- Try
- Q(D);N_PINP(e)
- Vars
- P(b);OGATEB,XP(B)::QAR2(D)
- P(b);OGATEB::QAR2(D),XP(b)
- P(e);OGATEB::QAR2(D)
- S(f);SBLOCK::QAB(D)
- P(c);N_GUARD::P(B)
- Refutation
- P(e);
- Try
- Q(D);N_PINP(e),P_PINP(b)
- Vars
- P(c);N_GUARD::P(B)
- Refutation
- S(f);
- Try
- Q(D);CHECK,N_PINP(e)
- Vars
- P(e);OGATEB,P_SPINP(e)::QAR2(D)
- Refutation
- S(f);P_SPINS(f)
- Try
- Actual
- Q(D);N_PINP(e)
- Vars
- P(b);OGATEB,XP(B)::QAR2(D)
- P(b);OGATEB::QAR2(D),XP(b)
- P(e);OGATEB::QAR2(D)
- P(e);SBLOCK::QAR2(D),XP(c)
- S(f);SBLOCK::QAB(D)
- P(c);N_GUARD::P(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).