MESON Chess Problem Database

Problem Display
PID: 214698 (8/N1p5/1b6/2p5/2kp4/K1p5/2P5/7Q w - - 0 1)

Klark, Dmitry Vasilevich

Vsemirnaya Illustrantiya, 1879

8/N1p5/1b6/2p5/2kp4/K1p5/2P5/7Q

#2

4 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qe4#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qg8#
      • 1...d3
        • 2.Qe4#
      • 1...Bxa7!
    • 1.Qf3?
      • threat
        • 2.Qf7#
      • 1...d3
        • 2.Qe4#
        • 2.Qxd3#
      • 1...Bxa7!
    • 1.Qc6?
      • threat
        • 2.Qe6#
      • 1...d3
        • 2.Qe4#
      • 1...Bxa7!
    • 1.Qa8?
      • threat
        • 2.Qg8#
      • 1...d3
        • 2.Qe4#
      • 1...Bxa7!
    • 1.Qf1+?
      • 1...d3
        • 2.Qxd3#
      • 1...Kd5!
  • Keys
    • 1.Qb7!
      • 1...Bxa7
        • 2.Qb3#
      • 1...d3
        • 2.Qe4#
      • 1...c6
        • 2.Qf7#
      • 1...Ba5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(c);OGATEB::QAR2(A)
      • Refutation
        • B(e);XS(D)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Refutation
        • B(e);XS(D)
    • Try
      • Q(A);P_PINP(d)
      • Threat
        • QAB(A)
      • Vars
        • P(c);OGATEB::QAR2(A)
      • Refutation
        • B(e);XS(D)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • P(c);OGATEB::QAR2(A)
      • Refutation
        • B(e);XS(D)
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • B(e);OGATE,XS(D)::QAB1(A)
      • P(c);OGATEB::QAR2(A)
      • P(f);OGATE::QAB(A)
      • B(e);OGATE::QAB1(A)
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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).