MESON Chess Problem Database

Problem Display
PID: 92924 (8/6p1/1P2P1P1/2PkpQ2/1K6/4P3/4P3/8 w - - 0 1)

Nilsson, Ragnar

Tidskrift for Schack, 1951

8/6p1/1P2P1P1/2PkpQ2/1K6/4P3/4P3/8

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qe4#
  • Tries
    • 1.Qd3+?
      • 1...Kc6
        • 2.Qe4#
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Qg4?
      • 1...Kc6
        • 2.Qe4#
      • 1...e4!
    • 1.Qf3+?
      • 1...Kxe6
        • 2.Qf7#
      • 1...e4!
    • 1.Qf4?
      • 1...Kc6
        • 2.Qe4#
      • 1...Kxe6
        • 2.Qf7#
      • 1...e4
        • 2.Qd6#
      • 1...exf4!
    • 1.Qxe5+?
      • 1...Kc6
        • 2.Qe4#
      • 1...Kxe5!
    • 1.Qf7?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc6
        • 2.Qd7#
      • 1...e4!
  • Keys
    • 1.Qf8!
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc6
        • 2.Qa8#
      • 1...Kxe6
        • 2.Qf7#
      • 1...e4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::QAB(E)
  • Tries
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(E)
        • K(a);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
        • P(b);OGATE,SBLOCK::QAR1(E)
      • Refutation
        • P(b);XQ(E)
    • Try
      • Q(E);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
    • Try
      • Q(E);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
  • Actual
    • Q(E);N_PINP(b)
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAB(E)
      • K(a);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • P(b);SBLOCK::QAR1(E)
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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).