MESON Chess Problem Database

Problem Display
PID: 215666 (7n/3R1pQb/5PRq/KBk3p1/3p3B/2pP2r1/4Pp2/6b1 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1991

7n/3R1pQb/5PRq/KBk3p1/3p3B/2pP2r1/4Pp2/6b1

#2

9 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh4
      • 2.Qf8#
    • 1...Qh5
      • 2.Qf8#
    • 1...Qxg6
      • 2.Qf8#
    • 1...fxg6
      • 2.Qe7#
  • Tries
    • 1.Rxg5+?
      • 1...Qxg5
        • 2.Qf8#
      • 1...Bf5
        • 2.Rxf5#
      • 1...Rxg5!
    • 1.Qxh8?
      • threat
        • 2.Qc8#
      • 1...Qf8
        • 2.Qxf8#
      • 1...Bg8!
    • 1.Qxf7?
      • threat
        • 2.Rd5#
        • 2.Qc4#
        • 2.Qd5#
        • 2.Qe7#
      • 1...Sxg6
        • 2.Rd5#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Re3
        • 2.Rd5#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Qg7
        • 2.Rd5#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Qf8
        • 2.Rd5#
        • 2.Qc4#
        • 2.Qd5#
        • 2.Qxf8#
      • 1...Bg8
        • 2.Rd5#
        • 2.Qe7#
      • 1...Sxf7!
    • 1.Qg8?
      • threat
        • 2.Qc8#
      • 1...Qf8
        • 2.Qxf8#
      • 1...Bxg8!
  • Keys
    • 1.e4!
      • threat
        • 2.Rd5#
      • 1...dxe4 ep
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(h);N_GUARD,XB(C)::QAB(I)
    • Q(h);N_GUARD::QAB(I)
    • Q(h);N_GUARD,XR(G)::QAB(I)
    • P(i);OGATE,XR(G)::QAB(I)
  • Tries
    • Try
      • R(G);CHECK,XP(g)
      • Vars
        • Q(h);XR(G)::QAB(I)
        • B(j);N_GUARD,P_SPINB(j)::R(G),XB(j)
      • Refutation
        • R(d);XR(G)
    • Try
      • Q(I);XS(k)
      • Threat
        • QAR(I)
      • Vars
        • Q(h);N_GUARD::QAB(I),XQ(h)
      • Refutation
        • B(j);
    • Try
      • Q(I);XP(i)
      • Threat
        • DUALS(4)
      • Refutation
        • S(k);XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAR(I)
      • Vars
        • Q(h);N_GUARD::QAB(I),XQ(h)
      • Refutation
        • B(j);XQ(I)
  • Actual
    • P(A);
    • Threat
      • R1(H)
    • Vars
      • P(e);EP,OGATE,XP(A)::P(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).