MESON Chess Problem Database

Problem Display
PID: 259731 (3N4/1p6/8/1Q6/4k2P/6P1/4N2K/3B4 w - - 0 1)

Weber, Jacques

Schweizerische Schachzeitung, 1970

3N4/1p6/8/1Q6/4k2P/6P1/4N2K/3B4

#2

7 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qc4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Ke5
        • 2.Qe6#
      • 1...Kf5
        • 2.Qe6#
      • 1...Ke3!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf3
        • 2.Qf4#
      • 1...Kxe5!
  • Keys
    • 1.Qb6!
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf3
        • 2.Sc3#
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke5
        • 2.Qe6#
      • 1...Kf5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
        • K(a);N_GUARD,P-FLIGHT::QAR1(F)
        • K(a);N_GUARD,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR1(F)
      • K(a);N_GUARD,S_FLIGHT::B(A)+S(B)
      • K(a);N_GUARD,P-FLIGHT::QAR1(F)
      • K(a);N_GUARD,S_FLIGHT::QAB1(F)
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