MESON Chess Problem Database

Problem Display
PID: 172267 (8/8/Q7/6pp/7k/7b/7K/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Twoja sudba, 1996

8/8/Q7/6pp/7k/7b/7K/8

#2

2 + 4

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qf6#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qg3#
        • 2.Qxh3#
      • 1...Bf1
        • 2.Qg3#
      • 1...Bg2
        • 2.Qg3#
      • 1...Bg4
        • 2.Qg3#
      • 1...Bf5
        • 2.Qg3#
      • 1...Be6
        • 2.Qg3#
      • 1...Bd7
        • 2.Qg3#
      • 1...Bc8
        • 2.Qg3#
      • 1...g4
        • 2.Qe7#
      • 1...Kg4!
    • 1.Qd6?
      • threat
        • 2.Qg3#
      • 1...g4
        • 2.Qe7#
        • 2.Qf6#
        • 2.Qd8#
      • 1...Kg4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qg3#
        • 2.Qxh3#
      • 1...Kg4
        • 2.Qe4#
      • 1...Bf1
        • 2.Qg3#
      • 1...Bg2
        • 2.Qg3#
      • 1...Bg4
        • 2.Qg3#
      • 1...Bf5
        • 2.Qg3#
      • 1...Be6
        • 2.Qg3#
      • 1...Bd7
        • 2.Qg3#
      • 1...Bc8
        • 2.Qg3#
      • 1...g4
        • 2.Qd8#

Anticipated by 174122(1930)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,SBLOCK::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(B)
        • P(c);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAR2(B)
      • B(a);::QAB1(B)
      • P(c);OGATEB,SBLOCK::QAB(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).