MESON Chess Problem Database

Problem Display
PID: 211435 (b7/8/2p2n2/4N3/4R2K/r6p/p4P1k/5Q2 w - - 0 1)

Kardos, Tivadar

Land og Folk, 1969

b7/8/2p2n2/4N3/4R2K/r6p/p4P1k/5Q2

#2

5 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Sxf3#
    • 1...Ra4
      • 2.Sf3#
    • 1...Ra5
      • 2.Sf3#
    • 1...Ra6
      • 2.Sf3#
    • 1...Ra7
      • 2.Sf3#
    • 1...Sxe4
      • 2.Sg4#
    • 1...Sg4
      • 2.Sxg4#
    • 1...Sd5
      • 2.Sg4#
    • 1...Sh5
      • 2.Sg4#
    • 1...Sd7
      • 2.Sg4#
    • 1...Sh7
      • 2.Sg4#
    • 1...Se8
      • 2.Sg4#
    • 1...Sg8
      • 2.Sg4#
  • Tries
    • 1.Re1?
      • threat
        • 2.Qg1#
        • 2.Qh1#
      • 1...Rg3
        • 2.Qh1#
      • 1...c5
        • 2.Qg1#
      • 1...Ra4+!
  • Keys
    • 1.Re2!
      • threat
        • 2.f3#
        • 2.f4#
      • 1...Ra4+
        • 2.f4#
      • 1...Re3
        • 2.fxe3#
      • 1...Rf3
        • 2.Sxf3#
      • 1...Rg3
        • 2.fxg3#
      • 1...Se4
        • 2.Sg4#
      • 1...Sg4
        • 2.Sxg4#
      • 1...c5
        • 2.f3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(c);N_GUARD::S(E),XR(c)
    • R(c);N_GUARD,P_PINR(C)::S(E)
    • R(c);N_GUARD::S(E)
    • S(f);N_GUARD,XR(C)::S(E)
    • S(f);N_GUARD::S(E),XS(f)
    • S(f);N_GUARD::S(E)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAR1(A)
        • P(e);::QAB1(A)
      • Refutation
        • R(c);CHECK
  • Actual
    • R(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);CHECK,SBLOCK::R(C)+P(B)
      • R(c);OGATE::R(C)+P(B),XR(c)
      • R(c);N_GUARD::S(E),XR(c)
      • S(f);N_GUARD::S(E)
      • S(f);N_GUARD::S(E),XS(f)
      • P(e);::R(C)+P(B)
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