MESON Chess Problem Database

Problem Display
PID: 264233 (8/q1p5/4N1K1/3p4/4kBp1/6Q1/5r2/4Nb2 w - - 0 1)

Hysek, Martin

Prace, 1965

8/q1p5/4N1K1/3p4/4kBp1/6Q1/5r2/4Nb2

#2

5 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qd4
      • 2.Sg5#
    • 1...Qb8
      • 2.Qe3#
    • 1...Qa1
      • 2.Qe3#
    • 1...Qa2
      • 2.Qe3#
    • 1...Qa4
      • 2.Qe3#
    • 1...Qa5
      • 2.Qe3#
    • 1...Qa6
      • 2.Qe3#
    • 1...Qb7
      • 2.Qe3#
    • 1...Qa8
      • 2.Qe3#
    • 1...Re2
      • 2.Qd3#
    • 1...Rxf4
      • 2.Qxf4#
    • 1...Bg2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Bh3
      • 2.Qd3#
    • 1...c5
      • 2.Qe3#
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe5#
      • 1...Rxf4
        • 2.Sg5#
      • 1...d4
        • 2.Qc6#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qa1
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 13
  • Sets
    • Q(f);N_GUARD::QAR1(B),XQ(f)
    • Q(f);SBLOCK::S(D)
    • Q(f);N_GUARD::QAR1(B)
    • Q(f);N_GUARD,P_PINS(D)::QAR1(B)
    • R(b);S_CUTB(a)::QAB1(B)
    • R(b);OGATE,XB(C)::QAR1(B),XR(b)
    • B(a);N_GUARD::QAB1(B)
    • B(a);N_GUARD::QAB1(B),XB(a)
    • P(g);S_CUTQ(f)::QAR1(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • R(b);SBLOCK,XB(C)::S(D)
      • P(e);OGATEB::QAB(B)
      • Q(f);N_GUARD::QAR1(B),XQ(f)
      • Q(f);N_GUARD::QAR1(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).