MESON Chess Problem Database

Problem Display
PID: 180764 (4qr2/8/4p1p1/8/4p1R1/3RNk2/5P2/1B2K3 w - - 0 1)

Spiess, Jean-Yves

Phenix, 1991

4qr2/8/4p1p1/8/4p1R1/3RNk2/5P2/1B2K3

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rg3#
  • Tries
    • 1.Sf1+?
      • 1...exd3
        • 2.Sh2#
      • 1...e3
        • 2.Sh2#
      • 1...Kxg4!
    • 1.Sc4+?
      • 1...exd3
        • 2.Se5#
      • 1...e3
        • 2.Se5#
      • 1...Kxg4!
    • 1.Rd7?
      • threat
        • 2.Bxe4#
      • 1...Rf4
        • 2.Rg3#
      • 1...Qa8!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Bxe4#
      • 1...Qa4
        • 2.Rxf8#
      • 1...Qc6
        • 2.Rxf8#
      • 1...Rf4
        • 2.Rg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK::R1(F)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(b);XR(D)::S(E)
        • P(b);P_SPINP(b)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • S(E);CHECK
      • Vars
        • P(b);XR(D)::S(E)
        • P(b);P_SPINP(b)::S(E)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • R(D);
      • Threat
        • B(A),XP(b)
      • Vars
        • R(f);SBLOCK::R1(F)
      • Refutation
        • Q(e);
  • Actual
    • R(D);
    • Threat
      • B(A),XP(b)
    • Vars
      • Q(e);OGATE::R(D),XR(f)
      • R(f);SBLOCK::R1(F)
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