MESON Chess Problem Database

Problem Display
PID: 274711 (5Kb1/2pN4/3kP3/5P2/4P3/8/2Q3n1/6bB w - - 0 1)

Dunton, RH

The Problemist, 1933

5Kb1/2pN4/3kP3/5P2/4P3/8/2Q3n1/6bB

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Se1
      • 2.e5#
    • 1...Se3
      • 2.Qc5#
      • 2.e5#
    • 1...Sf4
      • 2.e5#
    • 1...Sh4
      • 2.e5#
  • Tries
    • 1.Qd1+?
      • 1...Kc6
        • 2.Qd5#
      • 1...Bd4!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Qd5#
      • 1...Bd4!
    • 1.Qd2+?
      • 1...Kc6
        • 2.Qd5#
      • 1...Bd4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qd5#
      • 1...Kc6
        • 2.Qd5#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...c5
        • 2.Qb6#
      • 1...Se3
        • 2.e5#
      • 1...Sf4
        • 2.e5#
      • 1...c6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • S(b);::P(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);P-FLIGHT::QAB1(B)
      • B(e);OGATE,XP(E)::QAR1(B),XB(e)
      • P(d);N_GUARD,S_CUTB(a)::QAR2(B)
      • S(b);::P(C)
      • P(d);OGATEB,SBLOCK::QAB(B)
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).