MESON Chess Problem Database

Problem Display
PID: 234358 (n7/8/4RpKp/6pr/1B1N1k1b/2Qp2p1/4b1r1/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Skakbladet, 1948

n7/8/4RpKp/6pr/1B1N1k1b/2Qp2p1/4b1r1/8

#2

5 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg4
      • 2.Bd6#
    • 1...g4
      • 2.Qd2#
  • Tries
    • 1.Qxd3?
      • threat
        • 2.Re4#
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kg4
        • 2.Qf5#
      • 1...Bf3
        • 2.Qf5#
        • 2.Qxf3#
      • 1...Bg4
        • 2.Bd6#
        • 2.Re4#
        • 2.Qe4#
        • 2.Qe3#
      • 1...g4
        • 2.Bd2#
        • 2.Re4#
        • 2.Qe4#
        • 2.Qd2#
        • 2.Qe3#
      • 1...f5
        • 2.Qxf5#
      • 1...Bxd3+!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qf5#
      • 1...Kg4
        • 2.Qf5#
      • 1...Bg4
        • 2.Qd6#
      • 1...g4
        • 2.Bd2#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::B(B)
    • P(g);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);XP(c)
      • Threat
        • DUALS(3)
      • Vars
        • K(e);P-FLIGHT::QAB1(A)
        • P(i);::QAR1(A),XP(i)
      • Refutation
        • B(a);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(e);P-FLIGHT::QAB1(A)
      • B(a);SBLOCK::QAB(A)
      • P(g);SBLOCK::B(B)
      • P(i);::QAR1(A),XP(i)
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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).