MESON Chess Problem Database

Problem Display
PID: 197713 (8/8/P2p2P1/Qp6/4k1B1/1PPN4/5P2/4K3 w - - 0 1)

van Eelde, Antonie Clarus Johannes

Haagsche Courant, 1899

8/8/P2p2P1/Qp6/4k1B1/1PPN4/5P2/4K3

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Bf5#
    • 1...b4
      • 2.Qf5#
  • Tries
    • 1.Kd2?
      • 1...b4
        • 2.Qf5#
        • 2.f3#
      • 1...d5
        • 2.f3#
      • 1...Kd5!
    • 1.Ke2?
      • 1...b4
        • 2.Bf3#
        • 2.Bf5#
        • 2.Qf5#
        • 2.f3#
      • 1...d5
        • 2.f3#
      • 1...Kd5!
    • 1.Qb4+?
      • 1...Kxd3
        • 2.Bf5#
      • 1...Kd5!
    • 1.Qb6?
      • threat
        • 2.Qd4#
      • 1...Kd5
        • 2.Qb7#
      • 1...Kxd3!
    • 1.a7?
      • 1...Kxd3
        • 2.Bf5#
      • 1...Kd5
        • 2.a8Q#
        • 2.a8B#
      • 1...b4
        • 2.Qf5#
      • 1...d5!
  • Keys
    • 1.Qc7!
      • 1...Kxd3
        • 2.Bf5#
      • 1...Kd5
        • 2.Qb7#
      • 1...d5
        • 2.Sc5#
      • 1...b4
        • 2.Qc4#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XS(E)::B(F)
    • P(b);OGATE::QAB1(G)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(c);SBLOCK::P(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(c);SBLOCK::P(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(E)::B(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(a);S_FLIGHT::QAB(G)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • P(H);
      • Vars
        • K(a);S_FLIGHT,XS(E)::B(F)
        • K(a);P_SPINP(b),S_FLIGHT::P=Q
        • P(b);OGATE::QAB1(G)
      • Refutation
        • P(c);
  • Actual
    • Q(G);
    • Vars
      • K(a);S_FLIGHT,XS(E)::B(F)
      • K(a);S_FLIGHT::QAB(G)
      • P(c);N_GUARD,SBLOCK::S(E)
      • P(b);N_GUARD::QAR2(G)
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