MESON Chess Problem Database

Problem Display
PID: 172065 (8/3P4/3p1N2/8/P2k2K1/PP1n4/3Q4/8 w - - 0 1)

Apro, Laszlo

Probleemblad, 1970

8/3P4/3p1N2/8/P2k2K1/PP1n4/3Q4/8

#2

7 + 3

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.d8S?
      • 1...Kc5
        • 2.Qe3#
      • 1...Ke5
        • 2.Qc3#
      • 1...d5!
    • 1.d8B?
      • 1...Kc5
        • 2.Qc3#
      • 1...Ke5
        • 2.Qe3#
      • 1...d5!
  • Keys
    • 1.d8Q!
      • threat
        • 2.Qxd6#
      • 1...Kc5
        • 2.Qc3#
      • 1...Ke5
        • 2.Qe3#
      • 1...d5
        • 2.Qxd5#

This anticipates 196244(1986)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(G);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAB(A)
      • Refutation
        • P(c);
    • Try
      • P(G);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAR2(A)
      • Refutation
        • P(c);
  • Actual
    • P(G);P_PINP(c)
    • Threat
      • QAR2(G),XP(c)
    • Vars
      • K(b);N_SPINP(c),N_SPINS(a),S_FLIGHT::QAR2(A)
      • P(c);OGATE::QAR1(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).