MESON Chess Problem Database

Problem Display
PID: 187765 (8/4p3/2B4Q/4k3/1P1N4/8/2K5/8 w - - 0 1)

Ursic, Andrej Anton

Skakbladet, 1909

8/4p3/2B4Q/4k3/1P1N4/8/2K5/8

#2

5 + 2

6490 yacpdb 2019
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qf4#
  • Tries
    • 1.Kd2?
      • 1...Kxd4
        • 2.Qf4#
      • 1...e6!
    • 1.Se2?
      • 1...e6
        • 2.Qf4#
      • 1...Kf5!
    • 1.Sb5?
      • 1...e6
        • 2.Qg5#
      • 1...Kf5!
    • 1.Bh1?
      • 1...Kxd4
        • 2.Qf4#
      • 1...e6!
    • 1.Bg2?
      • 1...Kxd4
        • 2.Qf4#
      • 1...e6!
    • 1.Bf3?
      • 1...Kxd4
        • 2.Qf4#
      • 1...e6!
    • 1.Bb7?
      • 1...Kxd4
        • 2.Qf4#
      • 1...e6!
    • 1.Ba8?
      • 1...Kxd4
        • 2.Qf4#
      • 1...e6!
    • 1.Qg5+?
      • 1...Kxd4
        • 2.Qf4#
        • 2.Qc5#
      • 1...Kd6!
    • 1.Qh2+?
      • 1...Kxd4
        • 2.Qf4#
      • 1...Kf6!
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Qe4#
      • 1...Kf4!
    • 1.Qh8+?
      • 1...Kd6
        • 2.Qb8#
      • 1...Kf4!
  • Keys
    • 1.Qf8!
      • 1...Kxd4
        • 2.Qf4#
      • 1...Kd6
        • 2.Qb8#
      • 1...e6
        • 2.Sf3#

Anticipated by 5141(1900)

This anticipates 193920(1916), 21242(1917), 28734(1923)

This is a version of 181855

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XS(C)::QAR2(E)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • P(b);
    • Try
      • S(C);
      • Vars
        • P(b);SBLOCK::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Vars
        • P(b);SBLOCK::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • P(b);
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • P(b);
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • P(b);
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • P(b);
    • Try
      • B(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAR2(E)
      • K(a);P_SPINP(b),S_FLIGHT::QAB(E)
      • P(b);SBLOCK::S(C)
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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).