MESON Chess Problem Database

Problem Display
PID: 214451 (b4N2/P7/3p1b2/3Nk1p1/1K4P1/Q1P2P2/8/7B w - - 0 1)

Pospisil, Josef

Wiener Schachzeitung, 1880

b4N2/P7/3p1b2/3Nk1p1/1K4P1/Q1P2P2/8/7B

#2

9 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.f4#
  • Tries
    • 1.Qa1?
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.f4#
      • 1...Bxd5!
    • 1.c4?
      • threat
        • 2.Qb2#
        • 2.Qa1#
        • 2.Qc3#
        • 2.Qe3#
      • 1...Kd4
        • 2.Qc3#
        • 2.Qe3#
      • 1...Bxd5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.f4#
      • 1...Bxd5
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(G)::B(A)+P(D)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B)+P(C)
      • Vars
        • K(a);P-FLIGHT,XS(G)::B(A)+P(D)
      • Refutation
        • B(e);XS(G)
    • Try
      • P(C);
      • Threat
        • DUALS(4)
      • Refutation
        • B(e);XS(G)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+P(C)
    • Vars
      • K(a);P-FLIGHT,XS(G)::B(A)+P(D)
      • B(e);SBLOCK,XS(G)::QAB(B)
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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).