MESON Chess Problem Database

Problem Display
PID: 3154 (3b2RQ/K1p1P1P1/pN2nk2/r2b1p1B/6PP/P2Nq3/1R6/B7 w - - 0 1)

Denneberg, H

Source?, 1926

3b2RQ/K1p1P1P1/pN2nk2/r2b1p1B/6PP/P2Nq3/1R6/B7

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sxd5#
  • Tries
    • 1.Re8?
      • threat
        • 2.g8S#
      • 1...Qxb6+
        • 2.Rxb6#
      • 1...fxg4
        • 2.Rf2#
      • 1...Sd4
        • 2.g8Q#
        • 2.g8B#
      • 1...Sf4
        • 2.g8Q#
        • 2.g8B#
      • 1...Sc5
        • 2.g8Q#
        • 2.g8B#
      • 1...Sg5
        • 2.Qh6#
        • 2.g8Q#
        • 2.g8B#
      • 1...Sf8
        • 2.gxf8S#
        • 2.g8Q#
        • 2.g8B#
      • 1...Sxg7!
  • Keys
    • 1.e8Q!
      • threat
        • 2.Qf7#
      • 1...Qxb6+
        • 2.Rxb6#
      • 1...Qxd3
        • 2.Sd7#
      • 1...Sxg7
        • 2.Qxg7#
      • 1...Sd4
        • 2.Sd7#
      • 1...Sf4
        • 2.g5#
      • 1...Sc5
        • 2.Sxd5#
      • 1...Sg5
        • 2.Qh6#
      • 1...Sf8
        • 2.gxf8Q#
        • 2.gxf8S#
        • 2.gxf8B#
        • 2.gxf8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(h);N_PINS(H)::S(H),XB(c)
  • Tries
    • Try
      • R(L);
      • Threat
        • P=S
      • Vars
        • Q(a);CHECK,OGATE,XS(H)::B(A)+R(B),XQ(a)
        • P(d);XP(E)::B(A)+R(B),DCHECK
        • S(f);N_GUARD,N_PINS(H)::P=Q
        • S(f);N_GUARD::P=Q
      • Refutation
        • S(f);P_SPINS(f),XP(K)
  • Actual
    • P(J);
    • Threat
      • QAR1(J)
    • Vars
      • Q(a);CHECK,OGATE,XS(H)::B(A)+R(B),XQ(a)
      • Q(a);N_PINS(H),XS(D)::S(H)
      • S(f);OGATE,P_SPINS(f),XP(K)::QAB1(M),XS(f)
      • S(f);N_PINS(H)::S(H)
      • S(f);N_GUARD,S_CUTQ(a)::P(E)
      • S(f);N_PINS(H)::S(H),XB(c)
      • S(f);S_CUTQ(a)::QAR2(M)
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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).