MESON Chess Problem Database

Problem Display
PID: 275604 (r7/2ppkP1p/1P2P3/1P6/1PQ5/8/b6K/1B2R1R1 w - - 0 1)

Zgerski, Gennadi Bronislavovich

Phenix, 2001

r7/2ppkP1p/1P2P3/1P6/1PQ5/8/b6K/1B2R1R1

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc5#
    • 1...Kf6
      • 2.Qh4#
    • 1...Kd8
      • 2.f8Q#
    • 1...Kf8
      • 2.e7#
  • Tries
    • 1.Qh4+?
      • 1...Kf8
        • 2.Rg8#
      • 1...Kd6!
    • 1.Qc5+?
      • 1...Kf6
        • 2.Qg5#
      • 1...Kd8
        • 2.Rg8#
        • 2.Qf8#
        • 2.f8Q#
        • 2.f8R#
      • 1...d6!
  • Keys
    • 1.exd7+!
      • 1...Kd6
        • 2.Qc6#
      • 1...Kf6
        • 2.Qf1#
        • 2.Qf4#
      • 1...Kxd7
        • 2.Qxc7#
      • 1...Kd8
        • 2.Qxc7#
      • 1...Kf8
        • 2.Rg8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);N_GUARD,S_CUTP(c),S_FLIGHT::QAB1(F)
    • K(d);N_GUARD,S_FLIGHT::QAB(F)
    • K(d);N_GUARD,S_CUTR(f),S_FLIGHT::P=Q
    • K(d);OGATE,S_FLIGHT::P(I)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::R1(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAB1(F)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • P(I);CHECK,XP(c)
    • Vars
      • K(d);N_GUARD,S_CUTB(a),S_FLIGHT::QAR1(F)
      • K(d);N_GUARD,P-FLIGHT,S_CUTB(a),XP(I)::QAR1(F),XP(b)
      • K(d);N_GUARD,S_CUTB(a),S_FLIGHT::QAB1(F),XP(b)
      • K(d);N_GUARD,S_FLIGHT::R1(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).