MESON Chess Problem Database

Problem Display
PID: 262527 (1KR1Q3/5N1n/1ppp4/3k4/2bpN1p1/3p2b1/6R1/1r2B2B w - - 0 1)

Hjelle, David

Europe Echecs, 1971

1KR1Q3/5N1n/1ppp4/3k4/2bpN1p1/3p2b1/6R1/1r2B2B

#2

8 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Seg5?
      • threat
        • 2.Qxc6#
      • 1...Kc5
        • 2.Qxc6#
      • 1...Bb5
        • 2.Rc2#
      • 1...c5
        • 2.Rg1#
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rh2#
        • 2.Rxg3#
        • 2.Qc6#
        • 2.Qe4#
        • 2.Qe6#
      • 1...Sxg5!
    • 1.Sf6+?
      • 1...Kc5
        • 2.Qxc6#
      • 1...Sxf6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qxc6#
      • 1...bxc5+
        • 2.Rb2#
      • 1...dxc5+
        • 2.Rxg3#
      • 1...Kxc5
        • 2.Qxc6#
      • 1...Ba2
        • 2.Rc2#
      • 1...Bb3
        • 2.Rc2#
      • 1...Bb5
        • 2.Rc2#
      • 1...Ba6
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(H),XP(i)
      • Vars
        • K(g);P-FLIGHT,P_SPINP(i)::QAR1(H),XP(i)
        • B(d);::B(B)+R(C)
      • Refutation
        • S(k);XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(g);N_GUARD,P-FLIGHT,P_SPINP(i)::QAR1(H),XP(i)
      • Refutation
        • S(k);XS(D)
  • Actual
    • S(D);
    • Threat
      • QAB1(H),XP(i)
    • Vars
      • P(h);CHECK,SBLOCK,XS(D)::B(B)+R(C)
      • P(j);CHECK,SBLOCK,XS(D)::B(B)+R(C),XB(c)
      • K(g);P-FLIGHT,P_SPINP(i),XS(D)::QAR1(H),XP(i)
      • B(d);::B(B)+R(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).