MESON Chess Problem Database

Problem Display
PID: 194320 (K4b1B/1p4q1/8/5P2/2P5/R1p5/1k2n1Q1/R7 w - - 0 1)

Rudd, Charles Dember

The Problemist, 1938

K4b1B/1p4q1/8/5P2/2P5/R1p5/1k2n1Q1/R7

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Qxe2#
    • 1...Qg3
      • 2.Qxe2#
    • 1...Qg6
      • 2.Qxe2#
    • 1...Qc7
      • 2.Qxe2#
    • 1...Qf7
      • 2.Qxe2#
    • 1...Qh7
      • 2.Qxe2#
    • 1...Qg8
      • 2.Qxe2#
  • Tries
    • 1.R1a2+?
      • 1...Kc1
        • 2.Qf1#
      • 1...Kb1!
    • 1.Qe4?
      • threat
        • 2.Qb1#
      • 1...Qg1
        • 2.Qxe2#
      • 1...c2!
  • Keys
    • 1.Qf1!
      • threat
        • 2.R1a2#
        • 2.Qb1#
      • 1...Kc2
        • 2.Qxe2#
      • 1...Bxa3
        • 2.Qb1#
      • 1...Qg1
        • 2.R1a2#
        • 2.Qxe2#
      • 1...Sc1
        • 2.Qxc1#
      • 1...c2
        • 2.R1a2#

There are these versions: 194321

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • K(a);P-FLIGHT::QAR2(B),XS(b)
    • Q(e);P_SPINP(c)::QAR(B),XS(b)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);N_SPINS(b),S_FLIGHT::QAR(B)
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT
    • Try
      • Q(B);N_PINS(b)
      • Threat
        • QAR1(B)
      • Vars
        • Q(e);P_SPINP(c)::QAR(B),XS(b)
      • Refutation
        • P(c);P_SPINQ(e)
  • Actual
    • Q(B);N_PINS(b)
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAR2(B),XS(b)
      • B(f);XR(C)::QAR1(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • P(c);P_SPINQ(e),SBLOCK::R1(A)
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).