MESON Chess Problem Database

Problem Display
PID: 200096 (B1n5/3R4/5N2/5p2/7R/3Pk1p1/2Q5/2b2bK1 w - - 0 1)

Shire, David J

The Problemist, 1982

B1n5/3R4/5N2/5p2/7R/3Pk1p1/2Q5/2b2bK1

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Qxc1#
    • 1...Bxd3
      • 2.Rxd3#
      • 2.Qxd3#
    • 1...Sb6
      • 2.Re7#
    • 1...Sa7
      • 2.Re7#
    • 1...Se7
      • 2.Rxe7#
    • 1...g2
      • 2.Qf2#
    • 1...f4
      • 2.Sg4#
  • Tries
    • 1.Kxf1?
      • threat
        • 2.Qxc1#
        • 2.Qe2#
      • 1...Bb2
        • 2.Qe2#
      • 1...Bd2
        • 2.Qc5#
      • 1...Ba3
        • 2.Qe2#
      • 1...Sd6
        • 2.Qe2#
      • 1...g2+!
    • 1.Sg4+?
      • 1...Kf4
        • 2.Qxc1#
      • 1...fxg4!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Sd5#
      • 1...Bd2
        • 2.Qf3#
      • 1...Be2
        • 2.Qxc1#
      • 1...Bg2
        • 2.Qe1#
      • 1...Sb6
        • 2.Re7#
      • 1...Se7
        • 2.Rxe7#
      • 1...f4
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);SBLOCK::QAB(B),XB(a)
    • S(f);N_GUARD::R(F)
    • S(f);N_GUARD::R(F),XS(f)
    • P(d);N_GUARD::QAB1(B)
    • P(e);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • K(A);P-FLIGHT,XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR1(B)
        • B(a);SBLOCK::QAB(B)
        • S(f);::QAR1(B)
      • Refutation
        • P(d);CHECK
    • Try
      • S(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(B),XB(a)
      • Refutation
        • P(e);XS(E)
  • Actual
    • Q(B);
    • Threat
      • S(E)
    • Vars
      • B(a);SBLOCK::QAR1(B)
      • B(b);SBLOCK::QAB(B),XB(a)
      • B(b);N_GUARD::QAR2(B)
      • S(f);N_GUARD::R(F)
      • S(f);N_GUARD::R(F),XS(f)
      • P(e);N_GUARD,SBLOCK::S(E)
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).