MESON Chess Problem Database

Problem Display
PID: 276524 (3k1B2/2p5/3qB1Q1/K7/8/8/2p5/3R4 w - - 0 1)

Hannelius, Jan Ingvar

Stella Polaris, 1970

3k1B2/2p5/3qB1Q1/K7/8/8/2p5/3R4

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2+
      • 2.Rxd2#
    • 1...Qd3
      • 2.Rxd3#
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qd5+
      • 2.Rxd5#
  • Keys
    • 1.Qg8!
      • threat
        • 2.Bxd6#
      • 1...Qd2+
        • 2.Bb4#
      • 1...Qd5+
        • 2.Bc5#
      • 1...Ke8
        • 2.Bxd6#
      • 1...Qxd1
        • 2.Ba3#
        • 2.Bb4#
        • 2.Bc5#
        • 2.Bd6#
      • 1...Qd7
        • 2.Ba3#
        • 2.Bb4#
        • 2.Bc5#
      • 1...Qd3
        • 2.Ba3#
        • 2.Bb4#
        • 2.Bc5#
        • 2.Bd6#
      • 1...Qd4
        • 2.Ba3#
        • 2.Bb4#
        • 2.Bc5#
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(b);CHECK,OGATEB::R(A),XQ(b)
    • Q(b);OGATEB::R(A),XQ(b)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+B(E),XQ(b)
    • Vars
      • Q(b);CHECK,OGATE::QAR(D)+B(E)
      • K(d);N_SPINQ(b),P-FLIGHT::QAR(D)+B(E),XQ(b)
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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).