MESON Chess Problem Database

Problem Display
PID: 70418 (8/1pQ2K2/2pN3b/3kpN2/3p4/2Rn1q2/5rBB/3R4 w - - 0 1)

Kipping, Cyril Stanley

Chess, 1950

8/1pQ2K2/2pN3b/3kpN2/3p4/2Rn1q2/5rBB/3R4

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Bxe4#
    • 1...Bf4
      • 2.Se7#
    • 1...Sf4
      • 2.Se3#
      • 2.Se7#
    • 1...c5
      • 2.Qxb7#
    • 1...b5
      • 2.Qxc6#
    • 1...b6
      • 2.Qxc6#
  • Tries
    • 1.Bxf3+?
      • 1...e4
        • 2.Se7#
        • 2.Bxe4#
      • 1...Rxf3!
    • 1.Qb6?
      • threat
        • 2.Qb3#
      • 1...dxc3
        • 2.Rxd3#
      • 1...Sc1
        • 2.Rc5#
        • 2.Qc5#
      • 1...Sb2
        • 2.Rc5#
        • 2.Qc5#
      • 1...Sb4
        • 2.Rc5#
        • 2.Qc5#
      • 1...Sc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...c5
        • 2.Qxb7#
      • 1...Rb2!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe6#
      • 1...dxc3
        • 2.Qxe5#
      • 1...c5
        • 2.Qxb7#
      • 1...Sf4
        • 2.Se3#
      • 1...Sc5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(c);OGATE::B(B),XQ(c)
    • B(h);N_PINS(E)::S(E)
    • P(g);OGATEB::QAB(G),XP(i)
    • P(i);N_GUARD::QAB1(G),XP(g)
  • Tries
    • Try
      • B(B);CHECK,N_SPINS(E),XQ(c)
      • Refutation
        • R(a);P_PINS(E),XB(B)
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • P(d);OGATEB,P_SPINS(b),XR(D)::R(A),XS(b)
        • P(g);OGATEB::QAB(G),XP(i)
      • Refutation
        • R(a);
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • P(d);P_SPINS(b),XR(D)::QAR1(G),XP(f)
      • P(g);OGATEB::QAB(G),XP(i)
      • S(b);N_PINS(E),P_SPINP(d)::S(E)
      • S(b);N_GUARD,P_SPINP(d)::QAR1(G),XP(f)
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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).