MESON Chess Problem Database

Problem Display
PID: 194994 (3Q4/1r6/1p2k3/1P1R4/5P2/4Kb2/8/3B4 w - - 0 1)

Jaarsveld, J

Utrecht Courant, 1918

3Q4/1r6/1p2k3/1P1R4/5P2/4Kb2/8/3B4

#2

6 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Re5#
      • 2.Qd6#
  • Tries
    • 1.Rd6+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kf7!
    • 1.Qf6+?
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kxf6!
    • 1.Qd7+?
      • 1...Kf6
        • 2.Rd6#
      • 1...Rxd7!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Rd6#
      • 1...Kxd5
        • 2.Bb3#
      • 1...Bxd5
        • 2.Bg4#
      • 1...Rf7
        • 2.Qd6#
      • 1...Re7
        • 2.Qf5#
      • 1...Rd7
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(E)::QAB1(F)
      • Refutation
        • K(c);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);P-FLIGHT::R(E)
      • Refutation
        • R(d);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • R1(E)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(E)::B(A)
      • B(a);OGATE,SBLOCK,XR(E)::B(A)
      • R(d);SBLOCK::QAR1(F)
      • R(d);SBLOCK::QAB1(F)
      • R(d);SBLOCK::R1(E)
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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).