MESON Chess Problem Database

Problem Display
PID: 227933 (r6B/4P2R/4k3/8/3R1K2/8/8/8 w - - 0 1)

Lipton, Michael

Deutsche Schachzeitung, 1986

r6B/4P2R/4k3/8/3R1K2/8/8/8

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.e8Q#
      • 2.e8R#
    • 1...Ra2
      • 2.e8Q#
      • 2.e8R#
    • 1...Ra3
      • 2.e8Q#
      • 2.e8R#
    • 1...Ra4
      • 2.e8Q#
      • 2.e8R#
    • 1...Ra5
      • 2.e8Q#
      • 2.e8R#
    • 1...Ra6
      • 2.e8Q#
      • 2.e8R#
    • 1...Rd8
      • 2.exd8S#
    • 1...Rf8+
      • 2.exf8S#
  • Tries
    • 1.e8S?
      • threat
        • 2.Sc7#
        • 2.Rd6#
      • 1...Ra4
        • 2.Sc7#
      • 1...Ra6
        • 2.Sc7#
      • 1...Ra7
        • 2.Rd6#
      • 1...Rc8
        • 2.Rd6#
      • 1...Rd8
        • 2.Sc7#
      • 1...Rxe8!
  • Keys
    • 1.Be5!
      • threat
        • 2.Rd6#
      • 1...Rf8+
        • 2.exf8S#
      • 1...Ra4
        • 2.e8Q#
        • 2.e8R#
      • 1...Ra6
        • 2.e8Q#
        • 2.e8R#
      • 1...Rd8
        • 2.exd8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::P=Q
    • R(b);N_GUARD,P_PINR(A)::P=Q
    • R(b);OGATE::PXR(b)=S
    • R(b);CHECK,OGATE::PXR(b)=S
  • Tries
    • Try
      • P(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);P_PINR(A)::S(C)
        • R(b);::S(C)
        • R(b);::R1(A)
      • Refutation
        • R(b);XS(C)
  • Actual
    • B(E);
    • Threat
      • R1(A)
    • Vars
      • R(b);CHECK,OGATE::PXR(b)=S
      • R(b);N_GUARD,P_PINR(A)::P=Q
      • R(b);N_GUARD::P=Q
      • R(b);OGATE::PXR(b)=S
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