MESON Chess Problem Database

Problem Display
PID: 62162 (4B3/6b1/4Kp2/5n1Q/2kPR3/n1P3R1/4P3/N4r2 w - - 0 1)

Fenner, A Jack

Chess, 1944

4B3/6b1/4Kp2/5n1Q/2kPR3/n1P3R1/4P3/N4r2

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qc5#
    • 1...Sxg3
      • 2.Qc5#
    • 1...Sxd4+
      • 2.Rxd4#
    • 1...Sh4
      • 2.Qc5#
      • 2.Qd5#
    • 1...Sd6
      • 2.Qc5#
      • 2.Qd5#
    • 1...Sh6
      • 2.Qc5#
      • 2.Qd5#
    • 1...Se7
      • 2.Qc5#
  • Tries
    • 1.Qxf5?
      • threat
        • 2.Qc5#
        • 2.Qd5#
      • 1...Rxa1
        • 2.Qd5#
      • 1...Rf3
        • 2.Qc5#
      • 1...Bf8
        • 2.Qd5#
      • 1...Rxf5!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qc7#
      • 1...Sxd4+
        • 2.Kd6#
      • 1...Rxa1
        • 2.Kxf5#
      • 1...Bf8
        • 2.Kxf6#
      • 1...Sb5
        • 2.Kd7#
      • 1...Se7
        • 2.Kxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(d);OGATE::QAR1(G)
    • S(d);OGATE,XR(D)::QAR1(G)
    • S(d);CHECK,OGATE,P_SPINS(d),XP(E)::R1(F),XS(d)
  • Tries
    • Try
      • Q(G);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XS(A)::QAB1(G)
        • R(a);::QAR1(G)
        • B(f);::QAB1(G)
      • Refutation
        • R(a);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)
    • Vars
      • S(d);CHECK,P_SPINS(d),XP(E)::QAB(G)+K(H)
      • R(a);XS(A)::QAB(G)+K(H),XS(d)
      • B(f);::QAB(G)+K(H),XP(e)
      • S(b);SBLOCK::QAB(G)+K(H)
      • S(d);::QAB(G)+K(H),XS(d)
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