MESON Chess Problem Database

Problem Display
PID: 65011 (3n4/8/5B2/1K6/4k3/1Q3R2/1np2rP1/2b5 w - - 0 1)

Funk, Jacob E

Good Companions (February), 1922

3n4/8/5B2/1K6/4k3/1Q3R2/1np2rP1/2b5

#2

5 + 6

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf3
      • 2.Qxf3#
    • 1...Sd1
      • 2.Qc4#
      • 2.Qd3#
    • 1...Sd3
      • 2.Qc4#
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qc4#
      • 2.Qd3#
    • 1...Sc4
      • 2.Qxc4#
      • 2.Qd3#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qe6#
  • Tries
    • 1.Qe3+?
      • 1...Kd5
        • 2.Qe5#
      • 1...Bxe3!
    • 1.Qb4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kd5!
  • Keys
    • 1.Kc5!
      • threat
        • 2.Qd5#
      • 1...Be3+
        • 2.Qxe3#
      • 1...Sd3+
        • 2.Qxd3#
      • 1...Sa4+
        • 2.Qxa4#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Sb7+
        • 2.Qxb7#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...Rd2
        • 2.Qe3#
      • 1...Sc4
        • 2.Qxc4#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATE,XR(C)::QAB1(B),XR(d)
    • S(f);N_GUARD::QAR2(B),XS(f)
    • S(f);N_GUARD::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(B),XS(b)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • B(a);CHECK,N_GUARD::QAR1(B),XB(a)
      • S(b);CHECK,N_GUARD::QAB1(B),XS(b)
      • S(b);CHECK,N_GUARD::QAR(B),XS(b)
      • S(f);CHECK,N_GUARD::QAR2(B),XS(f)
      • S(f);CHECK,N_GUARD::QAB(B),XS(f)
      • R(d);OGATE,XR(C)::QAB1(B),XR(d)
      • R(d);S_CUTB(a)::QAR1(B)
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