MESON Chess Problem Database

Problem Display
PID: 72332 (7r/5N2/1pp5/bP4R1/3kPp2/pP1P3b/N3BK2/1n1Rn1Q1 w - - 0 1)

Jelfs, GH

Jelfs, H

Chess, 1953

7r/5N2/1pp5/bP4R1/3kPp2/pP1P3b/N3BK2/1n1Rn1Q1

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Kxf1#
    • 1...Bg4
      • 2.Kf1#
    • 1...Bf5
      • 2.Kf1#
    • 1...Be6
      • 2.Kf1#
    • 1...Bd7
      • 2.Kf1#
    • 1...Bc8
      • 2.Kf1#
    • 1...Sd2
      • 2.Kxe1#
    • 1...Sc3
      • 2.Kxe1#
    • 1...Sxd3+
      • 2.Kf3#
    • 1...Sf3
      • 2.Kxf3#
    • 1...cxb5
      • 2.Rd5#
    • 1...c5
      • 2.Rd5#
  • Keys
    • 1.Rc5!
      • threat
        • 2.Rc4#
      • 1...Sxd3+
        • 2.Kf3#
      • 1...Kxc5
        • 2.d4#
      • 1...bxc5
        • 2.Qg7#
      • 1...cxb5
        • 2.Rd5#
      • 1...Be6
        • 2.Kf1#
      • 1...Sd2
        • 2.Kxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • B(d);::QAB(B)+K(E),XB(d)
    • B(d);::QAB(B)+K(E)
    • S(a);::QAB(B)+K(E),XS(b)
    • S(b);CHECK,P_SPINS(b),XP(G)::QAB(B)+K(E)
    • S(b);::QAB(B)+K(E),XS(b)
    • P(i);N_GUARD,XP(I)::R1(J)
    • P(i);N_GUARD::R1(J)
  • Actual
    • R(J);
    • Threat
      • R1(J)
    • Vars
      • S(b);CHECK,P_SPINS(b),XP(G)::QAB(B)+K(E)
      • K(e);OGATE,S_FLIGHT,XR(J)::P(G)
      • P(h);SBLOCK,XR(J)::QAB(B)
      • P(i);N_GUARD,XP(I)::R1(J)
      • B(d);::QAB(B)+K(E)
      • S(a);::QAB(B)+K(E),XS(b)
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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).