MESON Chess Problem Database

Problem Display
PID: 4673 (8/5K2/8/2Q1p1k1/4P1rR/8/7N/8 w - - 0 1)

Cook, Eugene Beauharnais

International Chess Magazine, 1886

8/5K2/8/2Q1p1k1/4P1rR/8/7N/8

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Rxg4#
    • 1...Rg1
      • 2.Sf3#
      • 2.Qe7#
    • 1...Rg2
      • 2.Sf3#
      • 2.Qe7#
    • 1...Rg3
      • 2.Qe7#
  • Tries
    • 1.Sxg4?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxh4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qxg4#
      • 1...Kf4
        • 2.Rxg4#
      • 1...Kxh4
        • 2.Qxg4#
      • 1...Rxg1
        • 2.Sf3#
      • 1...Rg2
        • 2.Sf3#
      • 1...Rg3
        • 2.Sf3#
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINP(b),P_SPINR(a),S_FLIGHT::R1(C),XR(a)
    • R(a);::QAB(D)
  • Tries
    • Try
      • S(A);XR(a)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAB1(D)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XR(C)
  • Actual
    • Q(D);N_PINP(b),P_PINR(a)
    • Threat
      • QAR1(D),XR(a)
    • Vars
      • K(c);S_FLIGHT::R1(C),XR(a)
      • K(c);N_SPINR(a),S_FLIGHT,XR(C)::QAR1(D),XR(a)
      • R(a);N_SPINR(a),XQ(D)::S(A)
      • R(a);::S(A)
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