MESON Chess Problem Database

Problem Display
PID: 203551 (8/2B1K3/3P4/2bPk3/Q3Pp2/5p2/3R4/4r3 w - - 0 1)

Jakab, Arpad

Uj Nemezdek, 1924

8/2B1K3/3P4/2bPk3/Q3Pp2/5p2/3R4/4r3

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.d7#
    • 1...Bf2
      • 2.d7#
    • 1...Ba3
      • 2.Qd4#
    • 1...Be3
      • 2.d7#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bxd6+
      • 2.Bxd6#
    • 1...Ba7
      • 2.d7#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Rxe4
        • 2.Qe6#
      • 1...Bxd6+!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Kf7#
      • 1...Kxe4
        • 2.Kf6#
      • 1...Rxe4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • B(d);N_PINP(E)::B(F)+P(E)
    • B(d);N_GUARD::QAB1(B)
    • B(d);N_GUARD,N_PINP(E)::QAB1(B),XB(d)
    • B(d);CHECK,OGATE,P_SPINB(d),XP(E)::B(F),XB(d)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT,XP(C)::QAR2(B)
        • R(a);SBLOCK,XP(C)::QAR1(B)
      • Refutation
        • B(d);CHECK,P_SPINB(d),XP(E)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)+K(G)
    • Vars
      • K(e);P-FLIGHT,XP(C)::QAR(B)+K(G)
      • R(a);SBLOCK,XP(C)::QAR(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).