MESON Chess Problem Database

Problem Display
PID: 255667 (4N1R1/8/1K6/4k1p1/5p2/2P1PQ2/4B3/8 w - - 0 1)

Banny, Dimitry Nikolaevich

Probleemblad, 1984

4N1R1/8/1K6/4k1p1/5p2/2P1PQ2/4B3/8

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qd5#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Rxg5#
        • 2.Qd5#
      • 1...fxe3
        • 2.Rxg5#
      • 1...g4
        • 2.Rg5#
        • 2.Qd5#
        • 2.Qxf4#
      • 1...Kf5!
    • 1.Rg7?
      • 1...Kf5
        • 2.Qd5#
      • 1...Ke6
        • 2.Qe4#
      • 1...fxe3
        • 2.Re7#
      • 1...g4!
    • 1.Qc6?
      • threat
        • 2.Rxg5#
      • 1...Kf5
        • 2.Qd5#
      • 1...g4
        • 2.Rg5#
      • 1...fxe3!
  • Keys
    • 1.Qg4!
      • 1...Ke4
        • 2.Qe6#
      • 1...Kd5
        • 2.Qf5#
      • 1...fxe3
        • 2.Rxg5#
      • 1...f3
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::QAR2(D)
  • Tries
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);XP(C)::R(G),XP(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • R(G);
      • Vars
        • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::QAR2(D)
        • K(b);N_GUARD,P-FLIGHT::QAR2(D)
        • P(a);XP(C)::R(G)
      • Refutation
        • P(c);
    • Try
      • Q(D);
      • Threat
        • R(G),XP(c)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(D)
        • P(c);::R(G)
      • Refutation
        • P(a);XP(C)
  • Actual
    • Q(D);
    • Vars
      • K(b);N_GUARD,P-FLIGHT,P_SPINP(a)::QAR2(D)
      • K(b);N_GUARD,P-FLIGHT::QAR2(D)
      • P(a);XP(C)::R(G),XP(c)
      • P(a);::R(G),XP(c)
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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).