MESON Chess Problem Database

Problem Display
PID: 273896 (8/R1q1b3/8/4B3/b1BN4/r1P5/3R4/k1K5 w - - 0 1)

Pickering, Sid J

The Problemist, 1932

8/R1q1b3/8/4B3/b1BN4/r1P5/3R4/k1K5

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Rxa2#
    • 1...Rb3
      • 2.Sxb3#
    • 1...Rxc3+
      • 2.Sc2#
    • 1...Bc2
      • 2.Sxc2#
    • 1...Bb3
      • 2.Sxb3#
    • 1...Bb5
      • 2.Sc2#
      • 2.Sb3#
    • 1...Bc6
      • 2.Sc2#
      • 2.Sb3#
    • 1...Bd7
      • 2.Sc2#
      • 2.Sb3#
    • 1...Be8
      • 2.Sc2#
      • 2.Sb3#
  • Tries
    • 1.Rxa4?
      • threat
        • 2.Sc2#
        • 2.Sb3#
      • 1...Qb6
        • 2.Sc2#
      • 1...Qb8
        • 2.Sc2#
      • 1...Qb7
        • 2.Sc2#
      • 1...Qxc4!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Sc2#
      • 1...Rxb3
        • 2.Sxb3#
      • 1...Bxb3
        • 2.Sxb3#
      • 1...Ra2
        • 2.Rxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::R1(B),XR(b)
    • R(b);N_GUARD,P_SPINB(c)::S(E),XR(b)
    • R(b);CHECK,P_SPINB(c),XP(C)::S(E)
    • B(c);N_GUARD,P_SPINR(b)::S(E),XB(c)
  • Tries
    • Try
      • R(G);P_PINR(b),XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(d);::S(E)
      • Refutation
        • Q(d);P_PINP(C),XB(D)
  • Actual
    • B(D);P_SPINP(C)
    • Threat
      • S(E)
    • Vars
      • R(b);P_SPINB(c),XB(D)::S(E),XR(b)
      • B(c);P_SPINR(b),XB(D)::S(E),XB(c)
      • R(b);N_GUARD::R1(B),XR(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).