MESON Chess Problem Database
Problem Display
PID: 87 (kB6/1b6/1R6/3NQ3/5p2/8/8/7K w - - 0 1)
Akerblom, Johan Axel
Nya Dagligt Allehanda, 1930
#2
5 + 3
| 3310 | 2345 Chess Problems | 1997 |
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Bxd5+
- 2.Qxd5#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...Bxd5+
- Tries
- 1.Kg1?
- 1...Bxd5
- 2.Qxd5#
- 1...Ba6
- 2.Sc7#
- 1...Bc6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...f3!
- 1...Bxd5
- 1.Kh2?
- 1...Bxd5
- 2.Qxd5#
- 1...Ba6
- 2.Sc7#
- 1...Bc6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...f3!
- 1...Bxd5
- 1.Rb1?
- 1...Bxd5+
- 2.Qxd5#
- 1...f3
- 2.Sb6#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...Bc6!
- 1...Bxd5+
- 1.Rb2?
- 1...Bxd5+
- 2.Qxd5#
- 1...f3
- 2.Sb6#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...Bc6!
- 1...Bxd5+
- 1.Rb3?
- 1...Bxd5+
- 2.Qxd5#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...f3
- 2.Sb6#
- 1...Bc6!
- 1...Bxd5+
- 1.Rb4?
- 1...Bxd5+
- 2.Qxd5#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...f3
- 2.Sb6#
- 1...Bc6!
- 1...Bxd5+
- 1.Qa1+?
- 1...Ba6
- 2.Sc7#
- 2.Qxa6#
- 1...Kxb8!
- 1...Ba6
- 1.Qd6?
- 1...Bxd5+
- 2.Qxd5#
- 1...Bc6
- 2.Qxc6#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...f3!
- 1...Bxd5+
- 1.Qc7?
- threat
- 2.Qxb7#
- 1...Bc6
- 2.Ra6#
- 2.Qxc6#
- 2.Qa7#
- 1...Ba6
- 2.Rxa6#
- 2.Qa7#
- 1...Bc8
- 2.Qa7#
- 1...Bxd5+!
- threat
- 1.Qg7?
- threat
- 2.Qxb7#
- 1...Kxb8
- 2.Qxb7#
- 1...Bc6
- 2.Qa7#
- 1...Ba6
- 2.Sc7#
- 2.Qa7#
- 1...Bc8
- 2.Sc7#
- 2.Qa7#
- 1...Bxd5+!
- threat
- 1.Qe7?
- threat
- 2.Qxb7#
- 1...Kxb8
- 2.Qxb7#
- 1...Bc6
- 2.Qa7#
- 1...Ba6
- 2.Sc7#
- 2.Qa7#
- 1...Bc8
- 2.Sc7#
- 2.Qa7#
- 1...Bxd5+!
- threat
- 1.Qe8?
- 1...Bc6
- 2.Qxc6#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...f3
- 2.Sc7#
- 1...Bxd5+!
- 1...Bc6
- 1.Kg1?
- Keys
- 1.Rb5!
- 1...Bxd5+
- 2.Qxd5#
- 1...Bc6
- 2.Qa1#
- 1...Ba6
- 2.Sc7#
- 1...Bc8
- 2.Sc7#
- 1...f3
- 2.Sb6#
- 1...Bxd5+
- 1.Rb5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(b);CHECK,OGATE,XS(B)::QAB(C),XB(b)
- B(b);N_PINS(B)::S(B)
- Tries
- Try
- K(A);N_SPINS(B),P-FLIGHT
- Vars
- B(b);OGATE,XS(B)::QAB(C),XB(b)
- B(b);::S(B)
- Refutation
- P(a);
- Try
- K(A);N_SPINS(B),P-FLIGHT
- Vars
- B(b);OGATE,XS(B)::QAB(C),XB(b)
- B(b);::S(B)
- Refutation
- P(a);
- Try
- R(D);
- Vars
- B(b);CHECK,OGATE,XS(B)::QAB(C),XB(b)
- P(a);N_PINS(B)::S(B)
- B(b);N_PINS(B)::S(B)
- Refutation
- B(b);
- Try
- R(D);
- Vars
- B(b);CHECK,OGATE,XS(B)::QAB(C),XB(b)
- P(a);N_PINS(B)::S(B)
- B(b);N_PINS(B)::S(B)
- Refutation
- B(b);
- Try
- R(D);
- Vars
- B(b);CHECK,OGATE,XS(B)::QAB(C),XB(b)
- B(b);N_PINS(B)::S(B)
- P(a);N_PINS(B)::S(B)
- Refutation
- B(b);
- Try
- R(D);
- Vars
- B(b);CHECK,OGATE,XS(B)::QAB(C),XB(b)
- B(b);N_PINS(B)::S(B)
- P(a);N_PINS(B)::S(B)
- Refutation
- B(b);
- Try
- Q(C);CHECK
- Refutation
- K(c);P-FLIGHT,P_SPINB(b),XB(E)
- Try
- Q(C);
- Vars
- B(b);CHECK,OGATE,XS(B)::QAB(C),XB(b)
- B(b);OGATEB::QAB(C),XB(b)
- B(b);N_PINS(B)::S(B)
- Refutation
- P(a);N_PINS(B)
- Try
- Q(C);
- Threat
- QAB1(C),XB(b)
- Vars
- B(b);N_PINS(B),OGATE::QAR1(C)
- Refutation
- B(b);CHECK,XS(B)
- Try
- Q(C);
- Threat
- QAB1(C),XB(b)
- Vars
- K(c);P-FLIGHT,P_SPINB(b),XB(E)::QAR1(C),XB(b)
- B(b);OGATE::QAR1(C)
- Refutation
- B(b);CHECK,XS(B)
- Try
- Q(C);
- Threat
- QAB1(C),XB(b)
- Vars
- K(c);P-FLIGHT,P_SPINB(b),XB(E)::QAR1(C),XB(b)
- B(b);OGATE::QAR1(C)
- Refutation
- B(b);CHECK,XS(B)
- Try
- Q(C);
- Vars
- B(b);OGATEB::QAB(C),XB(b)
- B(b);N_PINS(B)::S(B)
- P(a);N_PINS(B)::S(B)
- Refutation
- B(b);CHECK,XS(B)
- Try
- Actual
- R(D);
- Vars
- B(b);CHECK,OGATE,XS(B)::QAB(C),XB(b)
- B(b);N_GUARD::QAB(C)
- B(b);N_PINS(B)::S(B)
- P(a);N_PINS(B)::S(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).