MESON Chess Problem Database

Problem Display
PID: 277872 (bR6/rn2Q1K1/p1pP4/p1k1N1pp/r1p1R2B/p1N1P3/P7/8 w - - 0 1)

Wiedenhoff, Claude

diagrammes, 1981

bR6/rn2Q1K1/p1pP4/p1k1N1pp/r1p1R2B/p1N1P3/P7/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Rxc4#
    • 1...Kb6
      • 2.Sd7#
    • 1...Rb4
      • 2.Sd7#
    • 1...Sxd6
      • 2.Qxa7#
    • 1...Sd8
      • 2.d7#
  • Tries
    • 1.Sd3+?
      • 1...Kb6
        • 2.Qd8#
        • 2.Qc7#
      • 1...cxd3!
    • 1.Bxg5?
      • 1...Kb4
        • 2.Rxc4#
      • 1...Kb6
        • 2.Sd7#
      • 1...Sxd6
        • 2.Qxa7#
      • 1...Rb4
        • 2.Sd7#
      • 1...Sd8
        • 2.d7#
      • 1...h4!
    • 1.Rxc4+?
      • 1...Kb6
        • 2.Sd7#
        • 2.Rxc6#
        • 2.Qd8#
        • 2.Qc7#
      • 1...Rxc4!
    • 1.d7+?
      • 1...Kb6
        • 2.d8Q#
        • 2.d8B#
      • 1...Sd6!
  • Keys
    • 1.Qxg5!
      • 1...Sxd6+
        • 2.Sd7#
      • 1...Sd8+
        • 2.Sf7#
      • 1...Kb4
        • 2.Rxc4#
      • 1...Kb6
        • 2.Sd7#
      • 1...Kxd6
        • 2.Qe7#
      • 1...Rb4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);N_GUARD,P_SPINP(c),P_SPINS(k),S_CUTR(b),S_FLIGHT::R1(D),XP(c)
    • K(e);N_GUARD,P_SPINS(k),S_FLIGHT::S(F)
    • R(b);SBLOCK::S(F)
    • S(k);OGATE,P_PINQ(H),P_SPINS(k),SBLOCK,XP(G)::QAB(H),XR(j)
    • S(k);N_GUARD,P_PINQ(H)::QAB(H)+P(G)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • P(c);XS(F)
    • Try
      • B(E);XP(f)
      • Vars
        • K(e);N_GUARD,P_SPINP(c),P_SPINS(k),S_CUTR(b),S_FLIGHT::R1(D),XP(c)
        • K(e);N_GUARD,P_SPINS(k),S_FLIGHT::S(F)
        • S(k);OGATE,P_PINQ(H),P_SPINS(k),SBLOCK,XP(G)::QAB(H),XR(j)
        • R(b);SBLOCK::S(F)
        • S(k);N_GUARD,P_PINQ(H)::QAB(H)+P(G)
      • Refutation
        • P(g);
    • Try
      • R(D);CHECK,XP(c)
      • Refutation
        • R(b);XR(D)
    • Try
      • P(G);CHECK
      • Vars
        • K(e);P_SPINS(k),S_FLIGHT::P=Q
      • Refutation
        • S(k);P_SPINS(k)
  • Actual
    • Q(H);XP(f)
    • Vars
      • S(k);CHECK,SBLOCK,XP(G)::QAR(H)+S(F),DCHECK
      • S(k);CHECK::QAR(H)+S(F)
      • K(e);N_GUARD,P_SPINP(c),P_SPINS(k),S_CUTR(b),S_FLIGHT::R1(D),XP(c)
      • K(e);N_GUARD,P_SPINS(k),S_FLIGHT::S(F)
      • K(e);OGATEB,S_FLIGHT,XP(G)::QAB1(H)
      • R(b);SBLOCK::QAR(H)+S(F),XP(c)
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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).