MESON Chess Problem Database

Problem Display
PID: 261934 (8/8/2N1P3/1kpQ4/2N5/8/2K5/8 w - - 0 1)

Balslev, Ole

Problemnoter, 1965

8/8/2N1P3/1kpQ4/2N5/8/2K5/8

#2

5 + 2

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qf3?
      • 1...Ka4
        • 2.Qb3#
      • 1...Kxc4
        • 2.Qb3#
        • 2.Qd3#
      • 1...Ka6!
    • 1.Qd2?
      • 1...Ka4
        • 2.Qa5#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Kxc6
        • 2.Qd7#
      • 1...Ka6!
    • 1.Qd3?
      • 1...Ka4
        • 2.Sb2#
        • 2.Sb6#
        • 2.Qb3#
      • 1...Kxc6
        • 2.Qd7#
      • 1...Ka6!
    • 1.Qxc5+?
      • 1...Ka4
        • 2.Sb2#
        • 2.Sb6#
        • 2.Qb4#
        • 2.Qa5#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc5!
    • 1.Qd7?
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ka6
        • 2.Sb8#
      • 1...Ka4!
  • Keys
    • 1.Qd8!
      • 1...Ka4
        • 2.Qa5#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(C)
        • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(C)
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(b)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(C)
        • K(a);N_GUARD,S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR1(C)
      • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(C)
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
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