MESON Chess Problem Database

Problem Display
PID: 97963 (2r5/1p6/8/1Q3p2/3b1p1p/1N3B1K/ppk5/rb2RN2 w - - 0 1)

Hjelle, David

Problem (Zagreb), 1951

2r5/1p6/8/1Q3p2/3b1p1p/1N3B1K/ppk5/rb2RN2

#2

6 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Sxd4#
    • 1...Bc3
      • 2.Bd1#
    • 1...Bc5
      • 2.Qc4#
  • Tries
    • 1.Sbd2?
      • threat
        • 2.Qb3#
      • 1...Kc3
        • 2.Qb3#
      • 1...Bc3
        • 2.Qxf5#
      • 1...Rc3!
    • 1.Sc5?
      • threat
        • 2.Qd3#
        • 2.Qb3#
      • 1...Kc3
        • 2.Qb3#
      • 1...Bxc5
        • 2.Qc4#
      • 1...Rxc5!
    • 1.Qc4+?
      • 1...Bc3
        • 2.Sd4#
        • 2.Bd1#
      • 1...Rxc4!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Qb3#
      • 1...Kc3
        • 2.Qb3#
      • 1...Rc3
        • 2.Qe2#
      • 1...Bc3
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(k);P_PINB(D),SBLOCK::S(C),XB(f)
    • B(f);SBLOCK::B(D)
    • B(f);N_GUARD,S_CUTR(k)::QAR2(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(e);P-FLIGHT::QAR1(F)
        • B(f);SBLOCK::QAB(F),XP(i)
      • Refutation
        • R(k);P_PINB(D)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT::QAR1(F)
        • B(f);N_GUARD,XS(C)::QAR2(F)
      • Refutation
        • R(k);XS(C)
    • Try
      • Q(F);CHECK
      • Refutation
        • R(k);XQ(F)
  • Actual
    • S(C);
    • Threat
      • QAB1(F)
    • Vars
      • K(e);P-FLIGHT::QAR1(F)
      • R(k);P_PINB(D),SBLOCK::QAR2(F)
      • B(f);SBLOCK::QAB(F),XP(i)
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).