MESON Chess Problem Database

Problem Display
PID: 214550 (7Q/Bb1NKP2/8/N2kP3/5p2/8/2P1q3/1B6 w - - 0 1)

Freund, Jacob

Magyarorszag es a Nagyvilag, 1879

7Q/Bb1NKP2/8/N2kP3/5p2/8/2P1q3/1B6

#2

9 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.c4#
    • 1...Qf3
      • 2.c4#
    • 1...Qg4
      • 2.c4#
    • 1...Qh5
      • 2.c4#
    • 1...Qe1
      • 2.c4#
    • 1...Qd2
      • 2.c4#
    • 1...Qf2
      • 2.c4#
    • 1...Qg2
      • 2.c4#
    • 1...Qh2
      • 2.c4#
    • 1...Qe3
      • 2.c4#
    • 1...Qxe5+
      • 2.Qxe5#
    • 1...Ba8
      • 2.Qxa8#
  • Tries
    • 1.Qh1+?
      • 1...Qf3
        • 2.Qxf3#
        • 2.c4#
      • 1...Qg2
        • 2.c4#
      • 1...Qe4
        • 2.Ba2#
        • 2.c4#
      • 1...f3!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Sf6#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Ke4
        • 2.Sf6#
      • 1...Qxh5
        • 2.c4#
      • 1...Qa6
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD,N_PINP(D)::P(B)
    • Q(a);N_GUARD::P(B)
    • Q(a);CHECK,OGATE,XP(D)::QAR1(I),XQ(a)
    • B(d);OGATEB::QAB(I),XB(d)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • Q(a);N_PINP(D),P_SPINQ(a)::P(B)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(I);
    • Threat
      • S(F)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XP(D)::QAR1(I),XQ(a)
      • K(c);N_PINP(D),S_FLIGHT::S(F)
      • Q(a);N_GUARD,N_PINP(D),XQ(I)::P(B)
      • Q(a);N_GUARD,N_PINP(D)::QAB(I)
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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).