MESON Chess Problem Database

Problem Display
PID: 166849 (8/kPP5/1Rn5/2K5/8/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1926

8/kPP5/1Rn5/2K5/8/8/8/8

#2

4 + 2

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.b8Q#
    • 1...Sd4
      • 2.b8Q#
    • 1...Sa5
      • 2.b8Q#
    • 1...Se5
      • 2.b8Q#
    • 1...Se7
      • 2.b8Q#
    • 1...Sb8
      • 2.c8S#
    • 1...Sd8
      • 2.b8Q#
  • Tries
    • 1.Kb5?
      • 1...Sb4
        • 2.b8Q#
      • 1...Sa5
        • 2.b8Q#
      • 1...Se5
        • 2.b8Q#
      • 1...Se7
        • 2.b8Q#
      • 1...Sb8
        • 2.c8S#
      • 1...Sd8
        • 2.b8Q#
      • 1...Sd4+!
    • 1.Kd6?
      • 1...Sb4
        • 2.b8Q#
      • 1...Sd4
        • 2.b8Q#
      • 1...Sa5
        • 2.b8Q#
      • 1...Se5
        • 2.b8Q#
      • 1...Se7
        • 2.b8Q#
      • 1...Sb8
        • 2.c8S#
      • 1...Sd8
        • 2.b8Q#
      • 1...Kxb6!
    • 1.b8B+?
      • 1...Sxb8
        • 2.cxb8Q#
      • 1...Ka8!
    • 1.b8R?
      • threat
        • 2.c8S#
      • 1...Sxb8
        • 2.cxb8Q#
      • 1...Se7!
  • Keys
    • 1.b8Q+!
      • 1...Sxb8
        • 2.cxb8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::P=Q
    • S(a);SBLOCK::P=S
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::P=Q
        • S(a);SBLOCK::P=S
      • Refutation
        • S(a);CHECK
    • Try
      • K(A);S_FLIGHT
      • Vars
        • S(a);N_GUARD::P=Q
        • S(a);SBLOCK::P=S
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • P(C);CHECK
      • Vars
        • S(a);OGATE,XB(C)::PXS(a)=Q
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(C);
      • Threat
        • P=S
      • Vars
        • S(a);OGATE,XR(C)::PXS(a)=Q
      • Refutation
        • S(a);
  • Actual
    • P(C);CHECK
    • Vars
      • S(a);OGATE,XQ(C)::PXS(a)=Q
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