MESON Chess Problem Database

Problem Display
PID: 157247 (8/8/2Q5/8/p5K1/3R4/nk6/R7 w - - 0 1)

Speckmann, Werner

Danziger Neueste Nachrichten, 1939

8/8/2Q5/8/p5K1/3R4/nk6/R7

#2

4 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qxc1#
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sb4
      • 2.Qc1#
      • 2.Qc3#
  • Tries
    • 1.Rxa2+?
      • 1...Kb1
        • 2.Qc2#
      • 1...Kxa2!
    • 1.Qh1?
      • threat
        • 2.Qb1#
      • 1...Kc2
        • 2.Qb1#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sc3!
    • 1.Qc4?
      • threat
        • 2.Qxa2#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc1
        • 2.Qxc1#
        • 2.Qc3#
      • 1...Sb4
        • 2.Qc1#
        • 2.Qc3#
      • 1...Kxa1!
    • 1.Qf6+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Kc2!
  • Keys
    • 1.Ra3!
      • 1...Kxa1
        • 2.Qc1#
      • 1...Kxa3
        • 2.Qc3#
      • 1...Sc1
        • 2.Qxc1#
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb4
        • 2.Qc1#
        • 2.Qc3#

There are these versions: 11558

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(D),XS(a)
  • Tries
    • Try
      • R(A);CHECK,XS(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT,XR(A)
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(b);P-FLIGHT::QAB1(D)
        • S(a);N_GUARD::QAB1(D),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(D);
      • Threat
        • QAR1(D),XS(a)
      • Vars
        • S(a);N_GUARD::QAB1(D),XS(a)
      • Refutation
        • K(b);S_FLIGHT,XR(A)
    • Try
      • Q(D);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(D),XS(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT,XR(A)::QAR2(D)
      • K(b);P_SPINS(a),S_FLIGHT,XR(B)::QAR2(D)
      • S(a);N_GUARD::QAB1(D),XS(a)
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