MESON Chess Problem Database
Problem Display
PID: 261502 (6Q1/4R2P/3p1p2/4p3/3Nk2K/8/3P4/5B2 w - - 0 1)
Birchmeier, Oskar
Neue Zurcher Zeitung, 1966
#2
7 + 4
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...Kxd4
- Tries
- 1.Kg3?
- 1...Kxd4
- 2.Qc4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Kh3?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Kh5?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Sf5?
- 1...Kf4
- 2.Qg4#
- 1...Kxf5
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...Kf3!
- 1...Kf4
- 1.Be2?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Bg2+?
- 1...Kxd4
- 2.Qd5#
- 1...Kf4
- 2.Qg3#
- 2.Qg4#
- 1...Kd3!
- 1...Kxd4
- 1.Bd3+?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg3#
- 2.Qg4#
- 1...Kxd3!
- 1...Kxd4
- 1.Bc4?
- threat
- 2.Qg4#
- 1...Kxd4
- 2.Qd5#
- 1...Kf4
- 2.Qg4#
- 1...f5!
- threat
- 1.Bb5?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Ba6?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Re8?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Qb3?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qe3#
- 2.Qf3#
- 1...d5
- 2.Qe3#
- 1...f5!
- 1...Kxd4
- 1.Qd5+?
- 1...Kf4
- 2.Qf3#
- 1...Kxd5!
- 1...Kf4
- 1.Qe6?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 2.Qf5#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Qg2+?
- 1...Kf4
- 2.Qf3#
- 2.Qg4#
- 1...Kxd4!
- 1...Kf4
- 1.h8Q?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.h8S?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.h8B?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.h8R?
- 1...Kxd4
- 2.Qc4#
- 1...Kf4
- 2.Qg4#
- 1...d5
- 2.Qg4#
- 1...f5!
- 1...Kxd4
- 1.Kg3?
- Keys
- 1.Se6!
- 1...Kf3
- 2.Qg2#
- 1...Kd5
- 2.Qa8#
- 1...Kf5
- 2.Qg4#
- 1...f5
- 2.Qg2#
- 1...d5
- 2.Qg4#
- 1...Kf3
- 1.Se6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- K(D);P-FLIGHT
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- K(D);P-FLIGHT
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- S(C);
- Vars
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),S_FLIGHT,XS(C)::QAB1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- K(a);N_SPINP(b),S_FLIGHT
- Try
- B(A);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- B(A);CHECK
- Vars
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT,XS(C)::QAR1(G)
- Refutation
- K(a);N_SPINP(b),S_FLIGHT
- Try
- B(A);CHECK
- Vars
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT,XS(C)::QAR1(G)
- Refutation
- K(a);N_SPINP(b),S_FLIGHT,XB(A)
- Try
- B(A);
- Threat
- QAR2(G)
- Vars
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_SPINP(b),P-FLIGHT::QAR1(G)
- Refutation
- P(d);
- Try
- B(A);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- B(A);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- R(E);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- Q(G);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- P(c);SBLOCK::QAR1(G)
- Refutation
- P(d);
- Try
- Q(G);CHECK
- Vars
- K(a);N_SPINP(b),OGATE,P-FLIGHT::QAR1(G)
- Refutation
- K(a);N_SPINP(b),S_FLIGHT,XQ(G)
- Try
- Q(G);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- Q(G);CHECK
- Refutation
- K(a);N_SPINP(b),P-FLIGHT,XS(C)
- Try
- P(F);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- P(F);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- P(F);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- P(F);
- Vars
- K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR1(G)
- K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR1(G)
- P(c);SBLOCK::QAR2(G)
- Refutation
- P(d);
- Try
- Actual
- S(C);N_PINP(b)
- Vars
- K(a);N_GUARD,S_FLIGHT::QAB1(G)
- K(a);N_GUARD,S_CUTP(c),S_FLIGHT::QAB(G)
- P(d);SBLOCK::QAB(G)
- P(c);SBLOCK::QAR2(G)
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).