MESON Chess Problem Database

Problem Display
PID: 261617 (8/8/8/2Q5/p1K1N3/B7/Npkp1p2/5B2 w - - 0 1)

Hoffmann, Martin Wolfgang

Schweizerische Schachzeitung, 1981

8/8/8/2Q5/p1K1N3/B7/Npkp1p2/5B2

#2

6 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d1S
      • 2.Bd3#
    • 1...d1B
      • 2.Bd3#
  • Tries
    • 1.Qd4?
      • 1...Kb1
        • 2.Qxb2#
      • 1...Kd1
        • 2.Qxd2#
      • 1...b1Q
        • 2.Qxd2#
      • 1...b1B
        • 2.Qxd2#
      • 1...b1R
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qxb2#
      • 1...d1S
        • 2.Bd3#
        • 2.Qd3#
      • 1...d1B
        • 2.Bd3#
        • 2.Qxb2#
        • 2.Qd3#
      • 1...d1R
        • 2.Qxb2#
      • 1...b1S!
  • Keys
    • 1.Qb4!
      • 1...Kb1
        • 2.Qxb2#
      • 1...Kd1
        • 2.Qxd2#
      • 1...b1Q
        • 2.Qxd2#
      • 1...b1S
        • 2.Qxa4#
      • 1...b1B
        • 2.Qxd2#
        • 2.Qxa4#
      • 1...b1R
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qxb2#
      • 1...d1S
        • 2.Bd3#
      • 1...d1B
        • 2.Bd3#
        • 2.Qxb2#
      • 1...d1R
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK::B(A)
  • Tries
    • Try
      • Q(F);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR1(F),XP(a)
        • K(b);N_GUARD,P_SPINP(c),S_FLIGHT::QAR1(F),XP(c)
        • P(a);SBLOCK::QAR1(F),XP(c)
        • P(c);SBLOCK::QAR1(F),XP(a)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Vars
      • K(b);N_GUARD,P_SPINP(a),S_FLIGHT::QAR1(F),XP(a)
      • K(b);N_GUARD,S_FLIGHT::QAR1(F),XP(c)
      • P(a);SBLOCK::QAR1(F),XP(c)
      • P(a);SBLOCK::QAB(F),XP(e)
      • P(c);SBLOCK::QAR1(F),XP(a)
      • P(c);SBLOCK::B(A)
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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).