MESON Chess Problem Database
Problem Display
PID: 11288 (1bR4r/8/n4p2/pp1BN2n/Pk1PQ3/rPN4R/7K/2B5 w - - 0 1)
Froberg, Johan Hilding Laurentius
3rd Prize, Sydsvenska Dagbladet Snallposten, 1937
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra2+
- 2.Sxa2#
- 1...Bxe5+
- 2.dxe5#
- 1...Ba7
- 2.Sd3#
- 2.Sc6#
- 1...Sg3
- 2.Sd3#
- 1...Sf4
- 2.Sc6#
- 1...Sc5
- 2.dxc5#
- 1...Sc7
- 2.Sc6#
- 1...fxe5
- 2.dxe5#
- 1...Ra2+
- Tries
- 1.Be6?
- threat
- 2.Sd5#
- 1...Ra2+
- 2.Sxa2#
- 1...Bxe5+
- 2.dxe5#
- 1...Rxb3
- 2.d5#
- 1...bxa4
- 2.Qb7#
- 1...Sg3
- 2.Sd3#
- 1...Sf4
- 2.Sc6#
- 1...Sc7
- 2.Sc6#
- 1...Rd8!
- threat
- 1.Bf7?
- threat
- 2.Sd5#
- 1...Ra2+
- 2.Sxa2#
- 1...Bxe5+
- 2.dxe5#
- 1...Rxb3
- 2.d5#
- 1...bxa4
- 2.Qb7#
- 1...Sg3
- 2.Sd3#
- 1...Sf4
- 2.Sc6#
- 1...Sc7
- 2.Sc6#
- 1...Rd8!
- threat
- 1.Rc4+?
- 1...Kxb3
- 2.Qb1#
- 1...bxc4!
- 1...Kxb3
- 1.Rc7?
- threat
- 2.Sd3#
- 2.Sc6#
- 1...Ra2+
- 2.Sxa2#
- 1...Sxc7
- 2.Sc6#
- 1...fxe5
- 2.dxe5#
- 1...Sg3
- 2.Sd3#
- 1...Sf4
- 2.Sc6#
- 1...Sc5
- 2.Sc6#
- 2.dxc5#
- 1...Bxc7!
- threat
- 1.Qd3?
- threat
- 2.Qxb5#
- 1...Ra2+
- 2.Sxa2#
- 1...bxa4
- 2.Qc4#
- 2.Qb5#
- 1...Sc7
- 2.Sc6#
- 1...Bxe5+!
- threat
- 1.Qe2?
- threat
- 2.Qxb5#
- 1...bxa4
- 2.Qc4#
- 2.Qb5#
- 1...Ra2
- 2.Sxa2#
- 1...Sc7
- 2.Sc6#
- 1...Bxe5+!
- threat
- 1.Be6?
- Keys
- 1.Bg8!
- threat
- 2.Sd5#
- 1...Ra2+
- 2.Sxa2#
- 1...Bxe5+
- 2.dxe5#
- 1...Rxb3
- 2.d5#
- 1...bxa4
- 2.Qb7#
- 1...Sg3
- 2.Sd3#
- 1...Sf4
- 2.Sc6#
- 1...Sc7
- 2.Sc6#
- threat
- 1.Bg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(a);CHECK,N_GUARD::S(D),XR(a)
- B(h);CHECK,OGATE,XS(J)::QAR(H)+P(G),XB(h)
- S(e);N_PINS(J),P_PINR(E)::S(J)
- S(f);OGATE::QAR(H)+P(G),XS(f)
- S(f);N_PINS(J)::S(J)
- P(g);OGATE,XS(J)::QAR(H)+P(G),XP(g)
- Tries
- Try
- B(I);
- Threat
- S(D)
- Vars
- R(a);CHECK,N_GUARD::S(D),XR(a)
- B(h);CHECK,OGATE,XS(J)::QAR(H)+P(G),XB(h)
- R(a);SBLOCK,XP(C)::QAR(H)+P(G)
- P(d);OGATEB,XP(F)::QAR(H)
- S(e);N_PINS(J),P_PINR(E)::S(J)
- S(f);N_PINS(J)::S(J)
- Refutation
- R(i);
- Try
- B(I);
- Threat
- S(D)
- Vars
- R(a);CHECK,N_GUARD::S(D),XR(a)
- B(h);CHECK,OGATE,XS(J)::QAR(H)+P(G),XB(h)
- R(a);SBLOCK,XP(C)::QAR(H)+P(G)
- P(d);OGATEB,XP(F)::QAR(H)
- S(e);N_PINS(J),P_PINR(E)::S(J)
- S(f);N_PINS(J)::S(J)
- Refutation
- R(i);
- Try
- R(K);CHECK
- Vars
- K(b);P-FLIGHT,XP(C)::QAR2(H)
- Refutation
- P(d);XR(K)
- Try
- R(K);N_SPINS(J)
- Threat
- DUALS(2)
- Vars
- R(a);CHECK,N_GUARD::S(D),XR(a)
- S(f);XR(K)::S(J)
- P(g);OGATE,XS(J)::QAR(H)+P(G),XP(g)
- S(e);P_PINR(E)::S(J)
- Refutation
- B(h);P_PINS(J),XR(K)
- Try
- Q(H);
- Threat
- QAR1(H),XP(d)
- Vars
- R(a);CHECK,N_GUARD::S(D),XR(a)
- S(f);N_PINS(J)::S(J)
- Refutation
- B(h);CHECK,XS(J)
- Try
- Q(H);
- Threat
- QAR1(H),XP(d)
- Vars
- R(a);N_GUARD,P_PINQ(H)::S(D),XR(a)
- S(f);N_PINS(J)::S(J)
- Refutation
- B(h);CHECK,XS(J)
- Try
- Actual
- B(I);
- Threat
- S(D)
- Vars
- R(a);CHECK,N_GUARD::S(D),XR(a)
- B(h);CHECK,OGATE,XS(J)::QAR(H)+P(G),XB(h)
- R(a);SBLOCK,XP(C)::QAR(H)+P(G)
- P(d);OGATEB,XP(F)::QAR(H)
- S(e);N_PINS(J),P_PINR(E)::S(J)
- S(f);N_PINS(J)::S(J)
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).