MESON Chess Problem Database

Problem Display
PID: 224310 (K2B4/1B6/1p3n2/2k2P2/1N3n2/3pN3/1R1R1P2/3Q4 w - - 0 1)

Phelps, Francis Bradley

Brownson's Chess Journal, 1887

K2B4/1B6/1p3n2/2k2P2/1N3n2/3pN3/1R1R1P2/3Q4

#2

10 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sa6+?
      • 1...Kd4
        • 2.Bxf6#
      • 1...Kd6!
    • 1.Be7+?
      • 1...Kb5
        • 2.Sc6#
      • 1...Kd4!
    • 1.Qc1+?
      • 1...Kd4
        • 2.Bxf6#
      • 1...Kd6
        • 2.Qc7#
      • 1...Kb5!
  • Keys
    • 1.Qc2+!
      • 1...Kd4
        • 2.Bxf6#
      • 1...Kb5
        • 2.Sc6#
      • 1...Kd6
        • 2.Qc7#
      • 1...dxc2
        • 2.Sa6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P_SPINP(a),S_FLIGHT::B(J),XS(e)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • B(J);CHECK
      • Vars
        • K(c);P-FLIGHT::R(B)+S(F)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P_SPINP(a),S_FLIGHT::B(J),XS(e)
        • K(c);OGATE,P_SPINP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);CHECK
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT::B(J),XS(e)
      • K(c);P-FLIGHT::R(B)+S(F)
      • K(c);OGATE,P_SPINP(a),S_FLIGHT::QAB1(A)
      • P(a);XQ(A)::S(F)
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