MESON Chess Problem Database

Problem Display
PID: 71819 (8/5p2/3p1P1Q/8/NN2k1B1/1P6/8/5K2 w - - 0 1)

Ehrenstein, Moritz

Source?, 0000

8/5p2/3p1P1Q/8/NN2k1B1/1P6/8/5K2

#2

7 + 3

6035 Thirty Problems by Ehrenstein 1946

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qf4#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qe3#
        • 2.Qf4#
      • 1...Ke5!
    • 1.Kf2?
      • threat
        • 2.Qe3#
      • 1...Kd4
        • 2.Qe3#
        • 2.Qf4#
      • 1...Ke5!
    • 1.Sc3+?
      • 1...Ke5
        • 2.Sc6#
      • 1...Kd4!
    • 1.Qg5?
      • 1...Kd4
        • 2.Qf4#
      • 1...d5!
  • Keys
    • 1.Sc6!
      • 1...Kd3
        • 2.Bf5#
      • 1...Kd5
        • 2.Qh1#
      • 1...d5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(G)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(G)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR1(G)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);P-FLIGHT::QAR2(G)
      • Refutation
        • P(b);
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::B(E)
      • K(a);S_FLIGHT::QAB(G)
      • P(b);N_GUARD,SBLOCK::S(C)
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