MESON Chess Problem Database

Problem Display
PID: 205769 (8/Q5K1/1r2B3/Nk6/4R3/1N5b/8/8 w - - 0 1)

Schor, Laszlo

Sp. HM., Grantham Journal, 1925

8/Q5K1/1r2B3/Nk6/4R3/1N5b/8/8

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qc5#
    • 1...Rb7+
      • 2.Qxb7#
  • Tries
    • 1.Bd7+?
      • 1...Rc6
        • 2.Bxc6#
        • 2.Qb7#
      • 1...Bxd7!
    • 1.Rc4?
      • threat
        • 2.Sd4#
      • 1...Rb7+
        • 2.Qxb7#
      • 1...Ra6
        • 2.Qc5#
      • 1...Rd6!
    • 1.Qd7+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...Ka6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qa4#
      • 1...Rb7+
        • 2.Qxb7#
      • 1...Kxc6
        • 2.Qd7#
      • 1...Rxc6
        • 2.Qa5#
      • 1...Ra6
        • 2.Qc5#
      • 1...Rb8
        • 2.Sbd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,SBLOCK::QAR1(E)
    • R(c);CHECK,OGATEB::QAR2(E),XR(c)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • B(a);XB(D)
    • Try
      • R(B);
      • Threat
        • S(A)
      • Vars
        • R(c);CHECK,OGATEB::QAR2(E),XR(c)
        • R(c);OGATE,SBLOCK::QAR1(E)
      • Refutation
        • R(c);
    • Try
      • Q(E);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(E),XR(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAB1(E)
    • Vars
      • R(c);CHECK,OGATEB::QAR2(E),XR(c)
      • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(E)
      • R(c);SBLOCK,XS(C)::QAR1(E)
      • R(c);OGATE,SBLOCK::QAR1(E)
      • R(c);::S(A)
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).