MESON Chess Problem Database
Problem Display
PID: 148275 (KB5R/2R4B/p1r2pq1/1p4p1/1r6/b3N1N1/6Pk/4Q3 w - - 0 1)
Goldstein, Alexander
Parallele 50, 1948
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Be4#
- 1...Qc2
- 2.Be4#
- 1...Qd3
- 2.Be4#
- 1...Qe4
- 2.Bxe4#
- 1...Rb1
- 2.Bxg6#
- 1...Rb2
- 2.Bxg6#
- 1...Rb3
- 2.Bxg6#
- 1...g4
- 2.Bxg6#
- 1...Qb1
- Tries
- 1.Rxc6?
- threat
- 2.Se4#
- 2.Qh1#
- 1...Qb1
- 2.Se4#
- 2.Be4#
- 1...Qd3
- 2.Be4#
- 2.Qh1#
- 1...Qe4
- 2.Sxe4#
- 2.Bxe4#
- 2.Qh1#
- 1...Qf5
- 2.Qh1#
- 1...Qf7
- 2.Qh1#
- 1...Qe8
- 2.Qh1#
- 1...Qg7
- 2.Qh1#
- 1...Qg8
- 2.Qh1#
- 1...Rb1
- 2.Bxg6#
- 1...Rb2
- 2.Bxg6#
- 2.Qh1#
- 1...Rb3
- 2.Bxg6#
- 2.Qh1#
- 1...Ra4
- 2.Qh1#
- 1...Rc4
- 2.Qh1#
- 1...Rd4
- 2.Qh1#
- 1...Re4
- 2.Qh1#
- 1...Rg4
- 2.Qh1#
- 1...Rh4
- 2.Qh1#
- 1...Bb2
- 2.Qh1#
- 1...g4
- 2.Bxg6#
- 2.Qh1#
- 1...f5
- 2.Qh1#
- 1...Rf4!
- threat
- 1.Qf2?
- threat
- 2.Sef1#
- 1...Qb1
- 2.Be4#
- 1...Qd3
- 2.Be4#
- 1...Rb1
- 2.Sg4#
- 2.Bxg6#
- 1...Rc1!
- threat
- 1.Rxc6?
- Keys
- 1.Se2!
- threat
- 2.Qg1#
- 1...Qb1
- 2.Be4#
- 1...Rb1
- 2.Bxg6#
- 1...Rc1
- 2.Rc4#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- Q(i);OGATE::R(I)+B(F)
- Q(i);OGATE::R(I)+B(F),XQ(i)
- R(c);N_GUARD::R(I)+B(F),XQ(i)
- P(e);S_CUTR(c)::R(I)+B(F),XQ(i)
- Tries
- Try
- R(E);XR(g)
- Threat
- DUALS(2)
- Vars
- Q(i);::QAR1(A)
- Q(i);P_PINB(H)::QAR1(A)
- R(c);N_GUARD::R(I)+B(F),XQ(i)
- R(c);SBLOCK::QAR1(A)
- R(c);::QAR1(A)
- B(b);::QAR1(A)
- P(h);::QAR1(A)
- Refutation
- R(c);
- Try
- Q(A);
- Threat
- S(C)
- Vars
- Q(i);OGATE::R(I)+B(F)
- Refutation
- R(g);
- Try
- Actual
- S(D);
- Threat
- QAB1(A)
- Vars
- Q(i);OGATE::R(I)+B(F)
- R(c);N_GUARD::R(I)+B(F),XQ(i)
- R(g);OGATE::B(H)+R(E)
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).