MESON Chess Problem Database

Problem Display
PID: 206488 (8/3Qp1p1/6B1/4k2p/6pr/2P3Kp/2P4P/8 w - - 0 1)

Harcz, Karoly

Uj Nemezdek, 1925

8/3Qp1p1/6B1/4k2p/6pr/2P3Kp/2P4P/8

#2

6 + 7

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qf5#
    • 1...e6
      • 2.Qd4#
  • Tries
    • 1.Kf2?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kf6
        • 2.Qf5#
      • 1...e6
        • 2.Qd4#
      • 1...g3+!
    • 1.Bf5?
      • threat
        • 2.Qe6#
      • 1...e6
        • 2.Qxe6#
      • 1...Kf6!
    • 1.Bf7?
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qe6#
      • 1...e6
        • 2.Qxe6#
      • 1...Kf6!
    • 1.Qd3?
      • 1...Kf6
        • 2.Qf5#
      • 1...e6
        • 2.Qd4#
      • 1...Ke6!
    • 1.Qd5+?
      • 1...Kf6
        • 2.Qf5#
      • 1...Kxd5!
    • 1.c4?
      • 1...Kf6
        • 2.Qf5#
      • 1...e6!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qxe7#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Kf6
        • 2.Qf5#
      • 1...e6
        • 2.Qd4#

This anticipates 133802(1983)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAR1(F)
    • P(f);SBLOCK::QAB1(F)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::QAR1(F)
        • P(f);SBLOCK::QAB1(F)
      • Refutation
        • P(b);CHECK
    • Try
      • B(E);
      • Threat
        • QAR1(F)
      • Vars
        • P(f);::QAR1(F),XP(f)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(E);
      • Threat
        • QAR1(F)
      • Vars
        • K(d);P-FLIGHT::QAR2(F)
        • P(f);::QAR1(F),XP(f)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(d);S_FLIGHT::QAR1(F)
        • P(f);SBLOCK::QAB1(F)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(d);P-FLIGHT,XQ(F)
    • Try
      • P(C);
      • Vars
        • K(d);S_FLIGHT::QAR1(F)
      • Refutation
        • P(f);
  • Actual
    • B(E);
    • Threat
      • QAR2(F),XP(f)
    • Vars
      • K(d);P-FLIGHT,XB(E)::QAR2(F)
      • K(d);S_FLIGHT::QAR1(F)
      • P(f);SBLOCK::QAB1(F)
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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).