MESON Chess Problem Database

Problem Display
PID: 154036 (8/8/8/KN2p3/4p3/1P1PP3/b1k1N3/5Q1R w - - 0 1)

Hoeg, Nils

Chess Amateur (The), 1911

8/8/8/KN2p3/4p3/1P1PP3/b1k1N3/5Q1R

#2

8 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sed4+?
      • 1...Kb2
        • 2.Rh2#
        • 2.Qe2#
        • 2.Qg2#
        • 2.Qa1#
        • 2.Qc1#
        • 2.Qf2#
      • 1...Kd2
        • 2.Qe2#
      • 1...exd4!
    • 1.Qc1+?
      • 1...Kxb3
        • 2.Qc3#
      • 1...Kxd3!
    • 1.Qe1?
      • threat
        • 2.Qc3#
      • 1...Kb2
        • 2.Qc3#
      • 1...Kxb3
        • 2.Qc3#
      • 1...Kxd3!
  • Keys
    • 1.Qf2!
      • 1...Kb2
        • 2.Sed4#
      • 1...Kd2
        • 2.Sc1#
        • 2.Sf4#
      • 1...Kxb3
        • 2.Sc1#
      • 1...Kxd3
        • 2.Sc1#
      • 1...Bxb3
        • 2.Sf4#
      • 1...exd3
        • 2.Sed4#
      • 1...Bb1
        • 2.Sc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • P(d);XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT,XP(D)::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);S_FLIGHT,XP(D)::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR(A)+S(C)
      • K(b);S_FLIGHT,XP(D)::S(C)
      • K(b);S_FLIGHT,XP(E)::S(C)
      • B(a);SBLOCK,XP(D)::QAR(A)+S(C)
      • P(c);SBLOCK,XP(E)::QAR(A)+S(C),DCHECK
      • B(a);SBLOCK::QAR(A)+S(C)
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