MESON Chess Problem Database

Problem Display
PID: 96439 (rk3rq1/p1p3nb/Q2R1p2/2p4p/p7/6B1/1N6/1R4K1 w - - 0 1)

Hjelle, David

The Chess Problem, 1947

rk3rq1/p1p3nb/Q2R1p2/2p4p/p7/6B1/1N6/1R4K1

#2

6 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh8
      • 2.Sd3#
    • 1...Rf7
      • 2.Sd3#
    • 1...Rc8
      • 2.Qb5#
    • 1...Sf5
      • 2.Sc4#
    • 1...Se6
      • 2.Sd3#
    • 1...Se8
      • 2.Rd8#
    • 1...c4
      • 2.Sd3#
    • 1...f5
      • 2.Sc4#
    • 1...cxd6
      • 2.Bxd6#
    • 1...c6
      • 2.Rdd1#
      • 2.Rd2#
      • 2.Rd3#
      • 2.Rd4#
      • 2.Rd5#
      • 2.Rxc6#
      • 2.Re6#
      • 2.Rxf6#
      • 2.Rd7#
      • 2.Rd8#
  • Tries
    • 1.Sxa4+?
      • 1...Qb3
        • 2.Rxb3#
      • 1...Bxb1!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Bxc7#
      • 1...Rc8
        • 2.Qb5#
      • 1...Sf5
        • 2.Sc4#
      • 1...Se6
        • 2.Sd3#
      • 1...Se8
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(l);N_GUARD::R(A)+S(C)
    • R(k);S_CUTQ(l)::R(A)+S(C)
    • R(k);SBLOCK::QAR(E)
    • S(g);P_PINB(D),S_CUTB(h)::R(A)+S(C)
    • S(g);P_PINB(D),S_CUTQ(l)::R(A)+S(C)
    • S(g);P_PINB(D),S_CUTR(k)::R(F)
    • P(b);S_CUTQ(l)::R(A)+S(C)
    • P(d);S_CUTB(h)::R(A)+S(C)
    • P(f);OGATE,P_SPINP(f),XR(F)::B(D),XP(f)
  • Tries
    • Try
      • S(C);CHECK,XP(a)
      • Vars
        • Q(l);N_GUARD,P_SPINQ(l)::R(A),XQ(l)
      • Refutation
        • B(h);XR(A)
  • Actual
    • R(F);P_PINP(f)
    • Threat
      • B(D),XP(f)
    • Vars
      • R(k);SBLOCK::QAR(E)
      • S(g);P_PINB(D),S_CUTB(h)::R(A)+S(C)
      • S(g);P_PINB(D),S_CUTQ(l)::R(A)+S(C)
      • S(g);P_PINB(D),S_CUTR(k)::R(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).