MESON Chess Problem Database

Problem Display
PID: 273340 (6Q1/2Bkp1R1/1P6/1q4pK/BN4N1/n7/8/b7 w - - 0 1)

Howard, Kenneth Samuel

The Problemist, 1932

6Q1/2Bkp1R1/1P6/1q4pK/BN4N1/n7/8/b7

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Be5
      • 2.Sxe5#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Sb1
      • 2.Bxb5#
    • 1...Sc2
      • 2.Bxb5#
    • 1...Sc4
      • 2.Bxb5#
  • Tries
    • 1.Qd5+?
      • 1...Ke8
        • 2.Rg8#
        • 2.Qd8#
      • 1...Kc8!
    • 1.Qe6+?
      • 1...Ke8
        • 2.Rg8#
        • 2.Qc8#
        • 2.Qxe7#
      • 1...Kxe6!
  • Keys
    • 1.Rxg5!
      • threat
        • 2.Rd5#
      • 1...e5
        • 2.Rg7#
      • 1...e6
        • 2.Qd8#
      • 1...Be5
        • 2.Sxe5#
      • 1...Sc4
        • 2.Bxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);OGATE::B(A),XQ(c)
    • B(a);N_GUARD::S(C),XB(a)
    • S(b);N_GUARD::B(A),XQ(c)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • K(e);N_SPINP(f),N_SPINQ(c),S_FLIGHT
    • Try
      • Q(H);CHECK
      • Refutation
        • K(e);N_SPINP(f),N_SPINQ(c),S_FLIGHT,XQ(H)
  • Actual
    • R(G);N_PINP(f),P_SPINR(G),XP(d)
    • Threat
      • R(G)
    • Vars
      • P(f);N_PINR(G)::R(G)
      • P(f);SBLOCK::QAR1(H)
      • B(a);N_GUARD,N_PINR(G)::S(C),XB(a)
      • S(b);N_GUARD::B(A),XQ(c)
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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).