MESON Chess Problem Database
Problem Display
PID: 249019 (3KB3/8/b2kp3/6RR/1ppN4/3n4/8/3Q4 w - - 0 1)
Blikeng, Bjarne
1st HM., Postsjakk, 1970
#2
6 + 6
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Bb5
- 2.Sxb5#
- 1...Bb7
- 2.Sb5#
- 1...Bc8
- 2.Sb5#
- 1...Sc1
- 2.Sb5#
- 1...Se1
- 2.Sb5#
- 1...Sb2
- 2.Sb5#
- 1...Sf2
- 2.Sb5#
- 1...Sf4
- 2.Sb5#
- 1...Sc5
- 2.Sb5#
- 1...Bb5
- Tries
- 1.Rb5?
- threat
- 2.Rb6#
- 1...Bxb5
- 2.Sxb5#
- 1...Se5
- 2.Sf5#
- 1...e5
- 2.Rh6#
- 1...Bb7!
- threat
- 1.Re5?
- threat
- 2.Rxe6#
- 1...Bc8
- 2.Sb5#
- 1...Sf4
- 2.Sb5#
- 1...Sc5
- 2.Sb5#
- 1...Sxe5!
- threat
- 1.Rg6?
- threat
- 2.Rxe6#
- 1...Bc8
- 2.Sb5#
- 1...Sf4
- 2.Sb5#
- 1...Sc5
- 2.Sb5#
- 1...Se5!
- threat
- 1.Rh6?
- threat
- 2.Rxe6#
- 1...Bc8
- 2.Sb5#
- 1...Sf4
- 2.Sb5#
- 1...Sc5
- 2.Sb5#
- 1...Se5!
- threat
- 1.Qe2?
- threat
- 2.Qxe6#
- 1...Se5
- 2.Qxe5#
- 1...Bc8
- 2.Sb5#
- 1...Sf4
- 2.Qe5#
- 1...Sc5
- 2.Qe5#
- 1...e5!
- threat
- 1.Qf3?
- threat
- 2.Qc6#
- 2.Qf8#
- 1...e5
- 2.Qc6#
- 1...Bb5
- 2.Sxb5#
- 2.Qf8#
- 1...Bb7
- 2.Sb5#
- 2.Qf8#
- 1...Sf4
- 2.Qc6#
- 1...Se5!
- threat
- 1.Qa4?
- threat
- 2.Qc6#
- 2.Qd7#
- 2.Qxa6#
- 1...e5
- 2.Qc6#
- 1...Bb5
- 2.Sxb5#
- 1...Bb7
- 2.Sb5#
- 2.Qd7#
- 1...Bc8
- 2.Sb5#
- 2.Qc6#
- 1...Sc5
- 2.Qc6#
- 1...Se5!
- threat
- 1.Qh1?
- threat
- 2.Qc6#
- 1...Bb5
- 2.Sxb5#
- 1...Bb7
- 2.Sb5#
- 1...Se5!
- threat
- 1.Rb5?
- Keys
- 1.Ra5!
- threat
- 2.Rxa6#
- 1...Bb5
- 2.Sxb5#
- 1...Bb7
- 2.Sb5#
- 1...Bc8
- 2.Sb5#
- 1...Sc5
- 2.Sb5#
- 1...Se5
- 2.Sf5#
- 1...e5
- 2.Rh6#
- threat
- 1.Ra5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- B(d);N_GUARD::S(B),XB(d)
- B(d);N_GUARD::S(B)
- S(a);::QAR(A)+S(B),DCHECK
- Tries
- Try
- R(C);
- Threat
- R(C)
- Vars
- B(d);XR(C)::S(B),XB(d)
- S(a);::QAR(A)+S(B),DCHECK
- P(f);OGATEB::R(D)
- Refutation
- B(d);
- Try
- R(C);
- Threat
- R1(C),XP(f)
- Vars
- B(d);N_GUARD::S(B)
- S(a);::QAR(A)+S(B),DCHECK
- Refutation
- S(a);XR(C)
- Try
- R(C);P_PINP(f)
- Threat
- R1(C),XP(f)
- Vars
- B(d);N_GUARD::S(B)
- S(a);::QAR(A)+S(B),DCHECK
- Refutation
- S(a);
- Try
- R(D);P_PINP(f)
- Threat
- R1(D),XP(f)
- Vars
- B(d);N_GUARD::S(B)
- S(a);::QAR(A)+S(B),DCHECK
- Refutation
- S(a);
- Try
- Q(A);
- Threat
- QAR1(A),XP(f)
- Vars
- S(a);N_GUARD::QAB1(A),XS(a)
- B(d);N_GUARD::S(B)
- S(a);N_GUARD::QAB1(A)
- Refutation
- P(f);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- P(f);::QAR1(A)
- S(a);::QAR1(A)
- Refutation
- S(a);
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- P(f);::QAR1(A)
- B(d);N_GUARD::S(B),XB(d)
- S(a);::QAR1(A)
- Refutation
- S(a);
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- B(d);N_GUARD::S(B),XB(d)
- B(d);N_GUARD::S(B)
- Refutation
- S(a);
- Try
- Actual
- R(C);
- Threat
- R(C),XB(d)
- Vars
- B(d);N_GUARD::S(B),XB(d)
- B(d);N_GUARD::S(B)
- S(a);::QAR(A)+S(B),DCHECK
- P(f);OGATEB::R(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).