MESON Chess Problem Database

Problem Display
PID: 51271 (Q7/1pqNn3/1p2p3/1Nb3B1/4k1P1/1K2pb2/2P5/7B w - - 0 1)

Rendall, JL

Manchester Guardian, 1956

Q7/1pqNn3/1p2p3/1Nb3B1/4k1P1/1K2pb2/2P5/7B

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Bxf3#
    • 1...Bg2
      • 2.Bxg2#
    • 1...e5
      • 2.Sf6#
  • Tries
    • 1.Qa4+?
      • 1...Kd5
        • 2.Bxf3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bb4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Sc3#
      • 1...Kd5
        • 2.Bxf3#
      • 1...Bxh1
        • 2.Qxh1#
      • 1...Bg2
        • 2.Bxg2#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Ba3
        • 2.Qd4#
      • 1...Bb4
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bd6
        • 2.Qd4#
      • 1...Sd5
        • 2.Qh7#
      • 1...e5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::B(A),XB(b)
    • B(b);OGATEB::B(A),XB(b)
    • P(f);SBLOCK::S(G)
  • Tries
    • Try
      • Q(H);CHECK,N_PINP(g)
      • Vars
        • K(c);S_FLIGHT::B(A),XB(b)
        • B(d);N_GUARD::QAR1(H),XB(d)
      • Refutation
        • B(d);
  • Actual
    • Q(H);N_PINP(g)
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT::B(A),XB(b)
      • B(b);N_SPINB(b),OGATE,XB(A)::QAB(H),XB(b)
      • B(b);OGATEB::B(A),XB(b)
      • Q(h);N_GUARD::QAR1(H),XQ(h)
      • B(d);N_GUARD::QAR1(H)
      • B(d);N_GUARD::QAR1(H),XB(d)
      • S(i);N_GUARD,SBLOCK::QAB(H)
      • P(f);SBLOCK::S(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).