MESON Chess Problem Database

Problem Display
PID: 11660 (8/4n3/8/Bn5r/q1kPB3/1RP1Q3/3RK2p/NbbN4 w - - 0 1)

Hartong, Jan

Niemeijer, Meindert

Schakend Nederland, 1970

8/4n3/8/Bn5r/q1kPB3/1RP1Q3/3RK2p/NbbN4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa1
      • 2.Rb4#
    • 1...Qa2
      • 2.Rb4#
    • 1...Qb4
      • 2.Rxb4#
    • 1...Ba2
      • 2.Qd3#
    • 1...Bd3+
      • 2.Qxd3#
    • 1...Bb2
      • 2.Sxb2#
    • 1...Bxd2
      • 2.Sb2#
    • 1...Sxc3+
      • 2.Qxc3#
    • 1...Sxd4+
      • 2.Qxd4#
  • Keys
    • 1.Qg5!
      • threat
        • 2.Se3#
      • 1...Bd3+
        • 2.Bxd3#
      • 1...Sxc3+
        • 2.Rxc3#
      • 1...Sxd4+
        • 2.Rxd4#
      • 1...Qxa1
        • 2.Rb4#
      • 1...Bxd2
        • 2.Sb2#
      • 1...Rh3
        • 2.Qc5#
      • 1...Sd5
        • 2.Bxd5#
      • 1...Sf5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(d);N_GUARD,XS(A)::R1(E)
    • Q(d);N_GUARD,P_PINR(C)::R1(E)
    • Q(d);N_GUARD::R1(E),XQ(d)
    • B(a);N_GUARD::QAB1(G)
    • B(a);CHECK,N_GUARD::QAB1(G),XB(a)
    • B(b);N_GUARD::S(B),XB(b)
    • B(b);N_GUARD,XR(C)::S(B)
    • S(f);CHECK,OGATE,XP(F)::QAR1(G),XS(f)
    • S(f);CHECK,OGATE,XP(H)::QAR1(G),XS(f)
  • Actual
    • Q(G);
    • Threat
      • S(B)
    • Vars
      • B(a);CHECK,N_GUARD::B(I),XB(a)
      • S(f);CHECK,OGATE,XP(F)::R1(E),XS(f)
      • S(f);CHECK,OGATE,XP(H)::R1(C),XS(f)
      • Q(d);N_GUARD,XS(A)::R1(E)
      • B(b);N_GUARD,XR(C)::S(B)
      • R(g);N_GUARD::QAR1(G)
      • S(h);N_GUARD::B(I),XS(h)
      • S(h);N_GUARD,S_CUTR(g)::QAB(G)
HTML5 logo

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).