MESON Chess Problem Database

Problem Display
PID: 91755 (8/8/8/3N3K/6p1/2Q1p1p1/4RPkB/5N2 w - - 0 1)

Rietveld, Johannes Jacob

Probleemblad, 1962

8/8/8/3N3K/6p1/2Q1p1p1/4RPkB/5N2

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kh3
      • 2.Sf4#
  • Tries
    • 1.Sf4+?
      • 1...Kxf1
        • 2.Qa1#
        • 2.Qe1#
        • 2.Qc1#
      • 1...Kf3
        • 2.Qxe3#
      • 1...Kh1!
    • 1.fxe3+?
      • 1...Kxf1
        • 2.Qe1#
      • 1...Kh1
        • 2.Sxg3#
      • 1...Kh3
        • 2.Sf4#
      • 1...Kf3!
    • 1.fxg3+?
      • 1...Kxf1
        • 2.Qe1#
      • 1...Kf3
        • 2.Qxe3#
      • 1...Kh3
        • 2.Sf4#
      • 1...Kh1!
    • 1.f4+?
      • 1...Kxf1
        • 2.Qe1#
      • 1...Kh1
        • 2.Sxg3#
      • 1...Kf3
        • 2.Qxe3#
      • 1...Kh3!
  • Keys
    • 1.f3+!
      • 1...Kxf1
        • 2.Qe1#
      • 1...Kh1
        • 2.Sxg3#
      • 1...Kxf3
        • 2.Qxe3#
      • 1...Kh3
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT,XS(A)::QAR1(E)
        • K(a);S_FLIGHT::S(A),XP(c)
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);CHECK,XP(c)
      • Vars
        • K(a);S_FLIGHT,XS(A)::QAR1(E)
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(A)::QAR1(E)
        • K(a);S_FLIGHT::S(A),XP(c)
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(C);CHECK
    • Vars
      • K(a);S_FLIGHT,XS(A)::QAR1(E)
      • K(a);S_FLIGHT::S(A),XP(c)
      • K(a);P_SPINP(b),S_FLIGHT,XP(C)::QAR1(E),XP(b)
      • K(a);S_FLIGHT::S(F)
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