MESON Chess Problem Database

Problem Display
PID: 57509 (1q5r/NpPP4/b2B4/2n5/2Pk1n2/KR1Pp1b1/1P3rB1/2R1N2Q w - - 0 1)

Kun, Joseph

Chess Life, 1956

1q5r/NpPP4/b2B4/2n5/2Pk1n2/KR1Pp1b1/1P3rB1/2R1N2Q

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa7
      • 2.Qxh8#
    • 1...Qxc7
      • 2.Qxh8#
    • 1...Rf1
      • 2.Sc2#
    • 1...Rxb2
      • 2.Sf3#
    • 1...Rc2
      • 2.Sxc2#
      • 2.Sf3#
    • 1...Rd2
      • 2.Sf3#
    • 1...Re2
      • 2.Sf3#
    • 1...Rxg2
      • 2.Sf3#
    • 1...Rf3
      • 2.Sc2#
      • 2.Sxf3#
    • 1...Bxc4
      • 2.Rxc4#
    • 1...Bb5
      • 2.Sxb5#
    • 1...Se2
      • 2.Sc2#
    • 1...e2
      • 2.Sc2#
    • 1...b5
      • 2.Sc6#
    • 1...b6
      • 2.Sc6#
  • Tries
    • 1.Rxb7?
      • threat
        • 2.Sc6#
      • 1...Qxa7
        • 2.Qxh8#
      • 1...Qxc7
        • 2.Qxh8#
      • 1...Qxb7
        • 2.Qxh8#
      • 1...Bxb7
        • 2.Sb5#
      • 1...Bb5
        • 2.Sxb5#
      • 1...e2!
  • Keys
    • 1.Bxb7!
      • threat
        • 2.Sc6#
      • 1...Qxa7
        • 2.Qxh8#
      • 1...Qxc7
        • 2.Qxh8#
      • 1...Qxb7
        • 2.Qxh8#
      • 1...Bxb7
        • 2.Sb5#
      • 1...e2
        • 2.Sc2#
      • 1...Bb5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(i);N_GUARD,XS(K)::QAB(C),XR(j)
    • Q(i);N_GUARD,XP(L)::QAB(C),XR(j)
    • R(a);N_GUARD::S(B)
    • R(a);N_GUARD,XP(D)::S(B)
    • R(a);N_GUARD,XB(E)::S(B)
    • B(g);OGATE,XP(I)::R1(A),XB(g)
    • B(g);N_GUARD::S(K),XB(g)
    • S(e);S_CUTR(a)::S(B)
    • P(b);S_CUTR(a)::S(B)
    • P(h);N_GUARD::S(K)
  • Tries
    • Try
      • R(G);XP(h)
      • Threat
        • S(K)
      • Vars
        • Q(i);N_GUARD,XS(K)::QAB(C),XR(j)
        • Q(i);N_GUARD,XP(L)::QAB(C),XR(j)
        • Q(i);N_GUARD,XR(G)::QAB(C),XR(j)
        • B(g);N_GUARD,XR(G)::S(K)
        • B(g);N_GUARD::S(K),XB(g)
      • Refutation
        • P(b);
  • Actual
    • B(E);XP(h)
    • Threat
      • S(K)
    • Vars
      • Q(i);N_GUARD,XS(K)::QAB(C),XR(j)
      • Q(i);N_GUARD,XP(L)::QAB(C),XR(j)
      • Q(i);N_GUARD,XB(E)::QAB(C),XR(j)
      • B(g);N_GUARD,XB(E)::S(K)
      • P(b);S_CUTR(a)::S(B)
      • B(g);N_GUARD::S(K),XB(g)
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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).