MESON Chess Problem Database

Problem Display
PID: 230398 (8/1B6/1p6/kp1Q4/8/1p6/1K6/8 w - - 0 1)

Matthaus, Hans Georg

Deutsche Schachzeitung, 1986

8/1B6/1p6/kp1Q4/8/1p6/1K6/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc3?
      • 1...b2
        • 2.Qa2#
      • 1...Ka4!
    • 1.Bc6?
      • threat
        • 2.Qxb5#
      • 1...Ka4
        • 2.Qxb5#
      • 1...Kb4
        • 2.Qxb5#
      • 1...Ka6!
    • 1.Qc4?
      • 1...b4
        • 2.Qa6#
      • 1...bxc4!
    • 1.Qc5?
      • threat
        • 2.Qa3#
      • 1...Ka4
        • 2.Qa3#
      • 1...bxc5!
    • 1.Qd6?
      • threat
        • 2.Qa3#
      • 1...Ka4
        • 2.Qa3#
      • 1...b4!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Qxb5#
      • 1...Ka4
        • 2.Qxb5#
      • 1...Kb4
        • 2.Qxb5#
      • 1...Kxa6
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(a);OGATE::QAR(B)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • K(b);P-FLIGHT::QAB1(B),XP(c)
        • K(b);N_SPINP(c),S_FLIGHT::QAR1(B),XP(c)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • Q(B);N_PINP(c)
      • Vars
        • P(c);OGATE,SBLOCK::QAR1(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(B)
      • Refutation
        • P(d);N_SPINP(c),XQ(B)
    • Try
      • Q(B);N_PINP(c)
      • Threat
        • QAR2(B)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);
  • Actual
    • B(C);
    • Threat
      • QAR1(B),XP(c)
    • Vars
      • K(b);N_SPINP(c),P-FLIGHT::QAB1(B),XP(c)
      • K(b);N_SPINP(c),S_FLIGHT::QAR1(B),XP(c)
      • K(b);N_SPINP(c),OGATEB,P-FLIGHT,XB(C)::QAR2(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).