MESON Chess Problem Database

Problem Display
PID: 235567 (8/8/2r1p2B/8/2p5/8/QN1q3P/N1k3KR w - - 0 1)

Hannelius, Jan Ingvar

1st HM., L'Italia Scacchistica, 1970

8/8/2r1p2B/8/2p5/8/QN1q3P/N1k3KR

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3+
      • 2.Bxe3#
    • 1...Qf4
      • 2.Bxf4#
    • 1...Qg5+
      • 2.Bxg5#
  • Tries
    • 1.Sd3+?
      • 1...Kd1
        • 2.Qxd2#
      • 1...cxd3!
    • 1.Sxc4?
      • threat
        • 2.Qc2#
      • 1...Qe3+
        • 2.Kg2#
      • 1...Qg5+
        • 2.Kf2#
      • 1...Kd1
        • 2.Qxd2#
      • 1...Rxc4!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Qc2#
      • 1...Qe3+
        • 2.Kg2#
      • 1...Qg5+
        • 2.Kf2#
      • 1...Kd1
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,OGATEB::B(G),XQ(b)
    • Q(b);OGATEB::B(G),XQ(b)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_SPINQ(b),P-FLIGHT::QAR1(D),XQ(b)
      • Refutation
        • P(c);XS(E)
    • Try
      • S(E);XP(c)
      • Threat
        • QAR1(D)
      • Vars
        • Q(b);CHECK::R(C)+K(B)
        • K(a);N_SPINQ(b),P-FLIGHT::QAR1(D),XQ(b)
      • Refutation
        • R(d);XS(E)
  • Actual
    • S(E);
    • Threat
      • QAR1(D)
    • Vars
      • Q(b);CHECK::R(C)+K(B)
      • K(a);N_SPINQ(b),P-FLIGHT::QAR1(D),XQ(b)
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).