MESON Chess Problem Database

Problem Display
PID: 198350 (8/6p1/6K1/4N3/1Q1bk3/p5P1/B7/8 w - - 0 1)

Schor, Laszlo

Western Mercury, 1920

(First published on Fri Jun 11 1920)

8/6p1/6K1/4N3/1Q1bk3/p5P1/B7/8

#2

5 + 4

6490 yacpdb 2019
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qe1#
    • 1...Kxe5
      • 2.Qe7#
  • Tries
    • 1.Kg5?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kxe5
        • 2.Qe7#
      • 1...g6!
    • 1.Bb3?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kxe5
        • 2.Qe7#
      • 1...a2!
    • 1.Bf7?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kxe5
        • 2.Qe7#
      • 1...a2!
    • 1.Bg8?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kxe5
        • 2.Qe7#
      • 1...a2!
    • 1.Qb1+?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kxe5!
    • 1.Qc4?
      • 1...Kxe5
        • 2.Qd5#
        • 2.Qe6#
      • 1...Ke3!
    • 1.Qb7+?
      • 1...Kxe5
        • 2.Qd5#
        • 2.Qe7#
      • 1...Ke3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Bxe5
        • 2.Bd5#
      • 1...Be3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINB(b),P-FLIGHT::QAR2(C)
    • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(D)::QAR2(C)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR2(C)
        • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(D)::QAR2(C)
      • Refutation
        • P(d);
    • Try
      • B(A);
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR2(C)
        • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(D)::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR2(C)
        • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(D)::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • K(c);N_SPINB(b),P-FLIGHT::QAR2(C)
        • K(c);N_SPINB(b),OGATEB,P-FLIGHT,XS(D)::QAR2(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK,N_PINB(b)
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • K(c);P-FLIGHT,XS(D)
    • Try
      • Q(C);
      • Refutation
        • K(c);N_SPINB(b),P-FLIGHT
    • Try
      • Q(C);CHECK,N_PINB(b)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(C);N_PINB(b)
    • Threat
      • QAR1(C)
    • Vars
      • K(c);P-FLIGHT,XS(D)::QAB1(C)
      • B(b);SBLOCK,XS(D)::B(A)
      • B(b);OGATE,SBLOCK::QAB1(C)
HTML5 logo

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).