MESON Chess Problem Database

Problem Display
PID: 50895 (3nB3/1n4b1/5p2/Rp1k4/8/3P3K/5Q1B/8 w - - 0 1)

James, F

Chess Amateur (The), 1907

3nB3/1n4b1/5p2/Rp1k4/8/3P3K/5Q1B/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Bf7#
  • Tries
    • 1.Rxb5+?
      • 1...Ke6
        • 2.Qe1#
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sc5!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Qe4#
        • 2.Qd7#
      • 1...Kxd4!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Rxb5#
      • 1...Ke6
        • 2.Qe4#
      • 1...Sxa5
        • 2.Qd6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD,SBLOCK::B(F)
  • Tries
    • Try
      • R(E);CHECK,XP(a)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::R1(E),XP(a)
      • K(b);N_SPINP(a),S_FLIGHT::QAR2(A)
      • S(d);N_GUARD,N_SPINP(a),XR(E)::QAR1(A)
      • S(d);N_GUARD,N_SPINP(a)::QAR1(A)
      • S(d);N_GUARD::QAR1(A),XS(d)
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