MESON Chess Problem Database
Problem Display
PID: 241385 (K1B5/pp5q/1pR3r1/3kNRp1/N7/BP2PP2/2r1n3/1b5Q w - - 0 1)
Hjelle, David
Parallele 50, 1947
#2
11 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qg8
- 2.f4#
- 1...Qc7
- 2.f4#
- 1...Qd7
- 2.f4#
- 1...Qe7
- 2.f4#
- 1...Qf7
- 2.f4#
- 1...Qg7
- 2.f4#
- 1...Rc4
- 2.bxc4#
- 1...Rcxc6
- 2.Sd3#
- 1...Rgxc6
- 2.Sg6#
- 1...Rd6
- 2.Rxd6#
- 1...Re6
- 2.Bxe6#
- 1...Rg7
- 2.Be6#
- 2.Rd6#
- 1...Rg8
- 2.Rd6#
- 1...Sd4
- 2.e4#
- 1...a5
- 2.Sxb6#
- 1...a6
- 2.Sxb6#
- 1...bxc6
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sxg6#
- 2.Sf7#
- 1...Qg8
- Tries
- 1.Rc4?
- threat
- 2.Sd3#
- 2.Sg4#
- 2.Sc6#
- 2.Sxg6#
- 2.Sf7#
- 2.e4#
- 1...Rxc4
- 2.bxc4#
- 1...Qh2
- 2.e4#
- 1...Qh3
- 2.Sg4#
- 2.e4#
- 1...Qh4
- 2.Sd3#
- 2.Sg4#
- 2.Sc6#
- 2.Sxg6#
- 2.Sf7#
- 1...Qc7
- 2.e4#
- 2.f4#
- 1...Qe7
- 2.e4#
- 2.f4#
- 1...Qf7
- 2.Sxf7#
- 2.e4#
- 2.f4#
- 1...Qg7
- 2.e4#
- 2.f4#
- 1...Qh8
- 2.e4#
- 1...Rc1
- 2.Sd3#
- 1...Ra2
- 2.Sd3#
- 1...Rb2
- 2.Sd3#
- 1...Rd2
- 2.Sd3#
- 1...Rc3
- 2.Sd3#
- 1...Rc6
- 2.Sg6#
- 2.e4#
- 1...Rd6
- 2.Sg6#
- 2.e4#
- 1...Re6
- 2.e4#
- 1...Rf6
- 2.e4#
- 1...Rh6
- 2.Sg6#
- 2.e4#
- 1...Rg7
- 2.Sg6#
- 2.e4#
- 1...Rg8
- 2.Sg6#
- 2.e4#
- 1...Sc3
- 2.Sd3#
- 2.Sg4#
- 2.Sc6#
- 2.Sxg6#
- 2.Sf7#
- 2.Rd4#
- 1...Sg3
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 2.e4#
- 1...g4
- 2.Sd3#
- 2.Sxg4#
- 2.Sc6#
- 2.Sxg6#
- 2.Sf7#
- 2.e4#
- 1...Qd7!
- threat
- 1.Rxg6?
- threat
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sd7#
- 2.Sf7#
- 2.Be6#
- 2.Rd6#
- 1...Qxg6
- 2.f4#
- 1...Qh2
- 2.Be6#
- 2.Rd6#
- 1...Qg8
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sd7#
- 2.Sf7#
- 2.Rd6#
- 2.f4#
- 1...Qh3
- 2.Sg4#
- 2.Be6#
- 2.Rd6#
- 1...Qh6
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sd7#
- 2.Sf7#
- 2.Be6#
- 1...Qc7
- 2.Be6#
- 2.f4#
- 1...Qd7
- 2.Sxd7#
- 2.f4#
- 1...Qe7
- 2.f4#
- 1...Qf7
- 2.Sxf7#
- 2.Rd6#
- 2.f4#
- 1...Qg7
- 2.Be6#
- 2.Rd6#
- 2.f4#
- 1...Qh8
- 2.Rd6#
- 1...Rc1
- 2.Sd3#
- 2.Be6#
- 2.Rd6#
- 1...Ra2
- 2.Sd3#
- 2.Be6#
- 2.Rd6#
- 1...Rb2
- 2.Sd3#
- 2.Be6#
- 2.Rd6#
- 1...Rd2
- 2.Sd3#
- 2.Be6#
- 2.Rd6#
- 1...Rc3
- 2.Sd3#
- 2.Be6#
- 2.Rd6#
- 1...Rc4
- 2.Sd3#
- 2.Be6#
- 2.Rd6#
- 2.bxc4#
- 1...Rc5
- 2.Sd3#
- 1...Rc6
- 2.Sd3#
- 1...Rc7
- 2.Sd3#
- 2.Be6#
- 2.Rd6#
- 1...Sg3
- 2.Be6#
- 2.Rd6#
- 1...Sd4
- 2.Rd6#
- 2.e4#
- 1...Sf4
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sd7#
- 2.Sf7#
- 2.Rd6#
- 1...g4
- 2.Sd3#
- 2.Sc4#
- 2.Sxg4#
- 2.Sc6#
- 2.Sd7#
- 2.Sf7#
- 2.Be6#
- 2.Rd6#
- 1...Rxc8+!
- threat
- 1.Qd1+?
- 1...Sd4
- 2.Qxd4#
- 2.e4#
- 1...Rd2!
- 1...Sd4
- 1.Rc4?
- Keys
- 1.Kxa7!
- threat
- 2.Sxb6#
- 1...bxc6+
- 2.Sf7#
- 1...Rcxc6
- 2.Sd3#
- 1...Rgxc6
- 2.Sg6#
- 1...Qc7
- 2.f4#
- 1...b5
- 2.Sb6#
- threat
- 1.Kxa7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 12
- Sets
- Q(j);N_GUARD,P_PINB(K)::QAB(A)+P(E)
- Q(j);N_GUARD::QAB(A)+P(E)
- R(b);OGATE::P(C),XR(b)
- R(b);SBLOCK,XR(I)::R(H)+S(G)
- R(g);SBLOCK,XR(I)::R(H)+S(G)
- R(g);N_GUARD::R1(I),XR(g)
- R(g);N_GUARD::B(K),XR(g)
- R(g);N_GUARD,P_PINB(K)::R1(I)
- S(c);SBLOCK::P(D)
- P(h);N_GUARD::S(F),XP(f)
- Tries
- Try
- R(I);
- Threat
- DUALS(6)
- Vars
- R(b);OGATE,XR(I)::P(C),XR(b)
- Q(j);::P(D)
- Q(j);P_PINB(K)::P(D)
- R(b);::R(H)+S(G)
- R(g);::P(D)
- S(c);N_GUARD::R1(I)
- Refutation
- Q(j);
- Try
- R(I);XR(g)
- Threat
- DUALS(8)
- Vars
- Q(j);N_GUARD,XR(I)::QAB(A)+P(E)
- Q(j);N_GUARD::QAB(A)+P(E)
- Q(j);P_PINB(K)::R1(I)
- R(b);::R(H)+S(G)
- Refutation
- R(b);CHECK,XB(K)
- Try
- Q(A);CHECK
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- K(J);P-FLIGHT,XP(h)
- Threat
- S(F),XP(f)
- Vars
- P(i);CHECK,SBLOCK,XR(I)::R(H)+S(G)
- R(b);SBLOCK,XR(I)::R(H)+S(G)
- R(g);SBLOCK,XR(I)::R(H)+S(G)
- Q(j);N_GUARD::QAB(A)+P(E)
- P(f);::S(F)
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).