MESON Chess Problem Database

Problem Display
PID: 211189 (7q/b2Bp3/4R3/5k1p/5p1B/3rp2K/3p1Q2/3N4 w - - 0 1)

Mehner, Heinrich

Badische Neueste Nachrichten, 1980

7q/b2Bp3/4R3/5k1p/5p1B/3rp2K/3p1Q2/3N4

#2

6 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sxe3#
    • 1...f3
      • 2.Qxf3#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qe4#
        • 2.Qg5#
        • 2.Qg6#
      • 1...Rxd7
        • 2.Qe4#
        • 2.Qg6#
      • 1...f3
        • 2.Qxf3#
        • 2.Qg5#
      • 1...Qf6
        • 2.Qe4#
      • 1...Qd4
        • 2.Qg5#
        • 2.Qg6#
      • 1...Qe5
        • 2.Rf6#
        • 2.Qg6#
      • 1...Qg7
        • 2.Qe4#
      • 1...Qh6
        • 2.Qe4#
      • 1...Qh7
        • 2.Qe4#
        • 2.Qg5#
      • 1...Qa8
        • 2.Qg5#
        • 2.Qg6#
      • 1...Qe8
        • 2.Qe4#
        • 2.Qg5#
      • 1...Qg8
        • 2.Qe4#
      • 1...Rd4
        • 2.Qg5#
        • 2.Qg6#
      • 1...e2+!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qe4#
      • 1...Qd4
        • 2.Qxh5#
      • 1...Qe5
        • 2.Rf6#
      • 1...Qa8
        • 2.Qxh5#
      • 1...Rd4
        • 2.Sxe3#
      • 1...e2
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD,S_CUTB(g)::S(A),XP(c)
    • P(d);OGATEB::QAR2(B),XP(d)
  • Tries
    • Try
      • Q(B);N_PINP(d)
      • Threat
        • DUALS(3)
      • Vars
        • Q(i);::QAB1(B)
      • Refutation
        • P(c);CHECK
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • Q(i);N_GUARD::QAR2(B),XP(f)
      • Q(i);SBLOCK::B(F)+R(E),DCHECK
      • R(b);N_GUARD,S_CUTB(g)::S(A),XP(c)
      • P(c);OGATE,P_PINQ(B)::QAB(B),XR(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).