MESON Chess Problem Database

Problem Display
PID: 109974 (4R3/5r2/2n3p1/2P1r3/4kp1P/1P2NR1B/6K1/5QB1 w - - 0 1)

Groeneveld, Cornelis

Hlas l'udu, 1983

4R3/5r2/2n3p1/2P1r3/4kp1P/1P2NR1B/6K1/5QB1

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc4#
    • 1...Ra7
      • 2.Rxf4#
    • 1...Rb7
      • 2.Rxf4#
    • 1...Rc7
      • 2.Rxf4#
    • 1...Rd7
      • 2.Rxf4#
    • 1...Re7
      • 2.Rxf4#
    • 1...Rg7
      • 2.Rxf4#
    • 1...Rh7
      • 2.Rxf4#
    • 1...Sb4
      • 2.Qc4#
    • 1...Sa7
      • 2.Qc4#
    • 1...Se7
      • 2.Qc4#
    • 1...Sb8
      • 2.Qc4#
    • 1...Sd8
      • 2.Qc4#
  • Tries
    • 1.Bf5+?
      • 1...Kd4
        • 2.Qc4#
      • 1...gxf5
        • 2.Rxf4#
      • 1...Rxf5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qd3#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Rxf4#
      • 1...Rd7
        • 2.Sf6#
      • 1...Sb4
        • 2.Rxe5#
      • 1...Sd4
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • K(a);N_SPINR(c),P-FLIGHT::QAR1(A)
    • R(f);N_GUARD::R1(F),XP(b)
    • R(f);N_GUARD,N_SPINR(c)::R1(F),XP(b)
    • S(d);N_GUARD::QAR2(A)
    • S(d);N_GUARD,N_SPINR(c)::QAR2(A)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT::QAR1(A)
        • P(e);XB(G)::R1(F),XP(b)
      • Refutation
        • R(f);XB(G)
  • Actual
    • S(E);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);N_SPINR(c),S_FLIGHT::QAB1(A)
      • K(a);N_SPINR(c),P_SPINP(b),S_FLIGHT::R1(F),XP(b)
      • R(f);N_GUARD::S(E)
      • S(d);N_GUARD::R1(J),XR(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).