MESON Chess Problem Database

Problem Display
PID: 141714 (N7/N7/p6p/P5pR/1k1P4/1PpP4/P1p3p1/R1Q3Kb w - - 0 1)

Erokhin, Vladimir Alekseevich

Probleemblad, 1977

N7/N7/p6p/P5pR/1k1P4/1PpP4/P1p3p1/R1Q3Kb

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa5
      • 2.Qa3#
    • 1...g4
      • 2.Sc6#
  • Tries
    • 1.Sb6?
      • 1...g4
        • 2.Sc6#
      • 1...Kxa5!
    • 1.Rxh6?
      • 1...Kxa5
        • 2.Qa3#
      • 1...g4!
    • 1.Qxc2?
      • 1...Kxa5
        • 2.Qxc3#
      • 1...g4
        • 2.a3#
      • 1...Ka3!
  • Keys
    • 1.a4!
      • 1...Kxb3
        • 2.Qa3#
      • 1...Kxa5
        • 2.Sc6#
      • 1...g4
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);P_SPINP(f),S_FLIGHT,XP(H)::QAR2(B)
    • P(f);::S(J)
  • Tries
    • Try
      • S(K);
      • Vars
        • P(f);::S(J)
      • Refutation
        • K(e);P_SPINP(f),S_FLIGHT,XP(H)
    • Try
      • R(I);XP(h)
      • Vars
        • K(e);S_FLIGHT,XP(H)::QAR2(B)
      • Refutation
        • P(f);
    • Try
      • Q(B);XP(b)
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT,XP(H)::QAB(B),XP(d)
        • P(f);::P(D)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • P(D);
    • Vars
      • K(e);P-FLIGHT,XP(E)::QAR1(B)
      • K(e);P_SPINP(f),S_FLIGHT,XP(H)::S(J)
      • P(f);::QAB1(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).