MESON Chess Problem Database

Problem Display
PID: 82135 (4nq1B/1bpN4/3pR3/3kp2R/3N4/2Q2Pr1/6B1/K7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problemas, 1970

4nq1B/1bpN4/3pR3/3kp2R/3N4/2Q2Pr1/6B1/K7

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sb6#
    • 1...c6
      • 2.Sb6#
  • Tries
    • 1.Sxe5?
      • threat
        • 2.Qc4#
      • 1...Qxf3
        • 2.Sg4#
      • 1...Rxf3
        • 2.Sf7#
      • 1...dxe5
        • 2.Rhxe5#
      • 1...Ba6!
    • 1.f4+?
      • 1...Rf3
        • 2.Bxf3#
      • 1...Rxg2!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Qb3#
      • 1...Qxf3
        • 2.Bxg3#
      • 1...Rxf3
        • 2.Bf6#
      • 1...dxe5
        • 2.Rhxe5#
      • 1...Ba6
        • 2.Qc6#
      • 1...c5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(f);N_GUARD::S(H)
  • Tries
    • Try
      • S(H);XP(c)
      • Threat
        • QAB1(C)
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h),XP(D)::R(F)+S(H)
        • R(a);N_GUARD,P_SPINR(a),XP(D)::R(F)+S(H)
        • P(d);OGATE,P_SPINP(d),XS(H)::R1(F),XP(d)
      • Refutation
        • B(e);
    • Try
      • P(D);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(B),XR(a)
      • Refutation
        • R(a);XB(B)
  • Actual
    • B(I);XP(c)
    • Threat
      • QAB(C)
    • Vars
      • Q(h);N_GUARD,P_SPINQ(h),XP(D)::R(F)+B(I),XR(a)
      • R(a);N_GUARD,P_SPINR(a),XP(D)::R(F)+B(I)
      • P(d);OGATE,P_SPINP(d),XB(I)::R1(F),XP(d)
      • B(e);N_GUARD::QAB1(C)
      • P(f);N_GUARD::S(H)
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