MESON Chess Problem Database

Problem Display
PID: 276533 (8/1p2r2Q/1K1p1B2/8/p1kPPRN1/PpP4R/nn6/7B w - - 0 1)

Retter, Yosef

2nd HM., Pat a Mat 04. TT, 2006

8/1p2r2Q/1K1p1B2/8/p1kPPRN1/PpP4R/nn6/7B

#2

11 + 8

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Qc7#
    • 1...Rc7
      • 2.Qxc7#
    • 1...Re8
      • 2.Qc7#
  • Tries
    • 1.Qg8+?
      • 1...Re6
        • 2.Qc8#
      • 1...d5
        • 2.Qxd5#
      • 1...Rf7!
    • 1.Qf7+?
      • 1...Re6
        • 2.Qc7#
      • 1...d5
        • 2.Qxd5#
      • 1...Rxf7!
    • 1.e5?
      • threat
        • 2.d5#
      • 1...Rxe5
        • 2.dxe5#
      • 1...Sxc3
        • 2.Se3#
      • 1...dxe5
        • 2.dxe5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...d5!
  • Keys
    • 1.d5!
      • threat
        • 2.e5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sxc3
        • 2.Rxc3#
      • 1...Re5
        • 2.Qc7#
      • 1...Sd3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(h);OGATE::QAR(K)
    • R(h);OGATE::QAR(K),XR(h)
  • Tries
    • Try
      • Q(K);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAR(K)
        • P(f);P_SPINP(f)::QAB1(K),XP(f)
      • Refutation
        • R(h);P_SPINR(h)
    • Try
      • Q(K);CHECK
      • Vars
        • R(h);OGATE,P_SPINR(h)::QAR(K)
        • P(f);P_SPINP(f)::QAB1(K),XP(f)
      • Refutation
        • R(h);XQ(K)
    • Try
      • P(F);
      • Threat
        • R(G)+P(E)
      • Vars
        • R(h);OGATE,XP(F)::R(G)+P(E),XR(h)
        • S(a);SBLOCK,XP(C)::S(H)
        • P(f);OGATE,XP(F)::R(G)+P(E),XP(f)
        • S(b);N_GUARD::QAB1(K),XS(b)
      • Refutation
        • P(f);
  • Actual
    • P(E);
    • Threat
      • R(G)+P(F)
    • Vars
      • R(h);OGATE,P_SPINR(h),XP(F)::QAR2(K),XR(h)
      • S(a);OGATE,XP(C)::R1(D),XS(a)
      • R(h);OGATE::QAR(K)
      • S(b);SBLOCK::S(H)
HTML5 logo

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).