MESON Chess Problem Database

Problem Display
PID: 222928 (8/8/5p2/2N2pR1/2K2kN1/8/3P4/7Q w - - 0 1)

Frohmann, Bedrich

Tabor, 1886

8/8/5p2/2N2pR1/2K2kN1/8/3P4/7Q

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sd3+?
      • 1...Kg3
        • 2.Sxf6#
      • 1...Kxg5!
    • 1.Qh2+?
      • 1...Kf3
        • 2.Qf2#
      • 1...Kxg5!
    • 1.Qh4?
      • 1...Kf3
        • 2.Qf2#
      • 1...fxg4
        • 2.Qxg4#
      • 1...fxg5!
  • Keys
    • 1.Se5!
      • 1...Kxe5
        • 2.Qh2#
      • 1...Kxg5
        • 2.Se6#
      • 1...fxe5
        • 2.Se6#
      • 1...fxg5
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R(F)+S(D),XP(c)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);OGATE,P_SPINP(b),XS(D)::QAR1(A),XP(b)
      • Refutation
        • P(c);XR(F)
  • Actual
    • S(D);
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT,XS(D)::QAB(A)
      • K(a);S_FLIGHT,XR(F)::S(E)
      • P(c);SBLOCK,XS(D)::S(E)
      • P(c);SBLOCK,XR(F)::QAB(A)
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