MESON Chess Problem Database

Problem Display
PID: 203226 (8/6N1/8/2K5/2p1k3/3p2Q1/8/1B6 w - - 0 1)

Kovacs, Florian Janos

Schweizerische Schachzeitung, 1924

8/6N1/8/2K5/2p1k3/3p2Q1/8/1B6

#2

4 + 3

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Bxd3#
  • Tries
    • 1.Kd6?
      • 1...Kd4
        • 2.Qe5#
      • 1...c3!
    • 1.Bc2?
      • 1...c3
        • 2.Bxd3#
      • 1...dxc2!
    • 1.Qf2?
      • 1...Ke5
        • 2.Qd4#
        • 2.Qf5#
      • 1...c3!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Kxf3!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Qf5#
        • 2.Qd4#
      • 1...Ke3!
  • Keys
    • 1.Ba2!
      • 1...c3
        • 2.Bd5#
      • 1...d2
        • 2.Bb1#

This anticipates 227722(1926), 108200(1954)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::B(A),XP(a)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(c);N_SPINP(a),P-FLIGHT::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • B(A);
      • Vars
        • P(b);N_GUARD::B(A),XP(a)
      • Refutation
        • P(a);N_SPINP(a),XB(A)
    • Try
      • Q(B);
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);N_SPINP(a),S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);N_SPINP(a),P-FLIGHT
  • Actual
    • B(A);N_PINP(a)
    • Vars
      • P(b);OGATE::B(A)
      • P(a);OGATEB::B(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).