MESON Chess Problem Database

Problem Display
PID: 264192 (1b2rn2/1Q1n4/1p1Nk1qR/5NP1/1B2rP2/2P1R3/8/1bK5 w - - 0 1)

Hjelle, David

Tijdschrift vd KNSB, 1948

1b2rn2/1Q1n4/1p1Nk1qR/5NP1/1B2rP2/2P1R3/8/1bK5

#2

10 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Sd4#
    • 1...Sc5
      • 2.Qf7#
    • 1...Se5
      • 2.Sg7#
    • 1...Sf6
      • 2.Sd4#
  • Tries
    • 1.Rxe4+?
      • 1...Se5
        • 2.Sd4#
        • 2.Sg7#
        • 2.Rxe5#
        • 2.Qf7#
      • 1...Bxe4!
    • 1.Rxg6+?
      • 1...Sf6
        • 2.Sd4#
        • 2.Sg7#
        • 2.Rxf6#
        • 2.Qf7#
      • 1...Sxg6!
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...Sc5
        • 2.Qf7#
      • 1...Se5
        • 2.Sg7#
      • 1...Sf6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(h);SBLOCK::S(F)
    • S(f);OGATE::QAB1(J)
    • S(f);N_SPINR(b)::S(F)
    • S(f);N_SPINQ(e)::S(F)
  • Tries
    • Try
      • R(C);CHECK,XR(b)
      • Refutation
        • B(a);XR(C)
    • Try
      • R(I);CHECK,XQ(e)
      • Refutation
        • S(i);XR(I)
  • Actual
    • P(B);
    • Threat
      • QAB1(J)
    • Vars
      • S(f);OGATE::QAB1(J)
      • S(f);N_SPINR(b)::S(F)
      • S(f);N_SPINQ(e)::S(F)
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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).