MESON Chess Problem Database

Problem Display
PID: 205830 (8/8/3Q4/8/p7/Nkp5/8/K7 w - - 0 1)

Grube, Andreas

Badische Neueste Nachrichten, 1985

8/8/3Q4/8/p7/Nkp5/8/K7

#2

3 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qg3?
      • 1...Kxa3
        • 2.Qxc3#
      • 1...Kb4!
    • 1.Qe5?
      • 1...Kxa3
        • 2.Qxc3#
      • 1...c2
        • 2.Qb2#
      • 1...Kb4!
    • 1.Qd3?
      • 1...Kxa3
        • 2.Qxc3#
      • 1...Kb4!
    • 1.Qd5+?
      • 1...Kb4
        • 2.Sc2#
      • 1...Kxa3!
    • 1.Qf6?
      • 1...Kxa3
        • 2.Qxc3#
      • 1...c2
        • 2.Qb2#
      • 1...Kb4!
  • Keys
    • 1.Qd4!
      • 1...Kxa3
        • 2.Qxc3#
      • 1...c2
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);P_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(C),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(C),XP(b)
        • P(b);OGATE::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);P_PINP(b)
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(C),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT,XS(B)::QAR2(C),XP(b)
        • P(b);OGATE::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT,XS(B)::QAR2(C),XP(b)
      • P(b);OGATE::QAR1(C)
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