MESON Chess Problem Database

Problem Display
PID: 187930 (4N3/2Qpp3/3P2NR/1p1k4/3p4/p2B4/K7/8 w - - 0 1)

van Dijk, Johannes

Source?, 1910

4N3/2Qpp3/3P2NR/1p1k4/3p4/p2B4/K7/8

#2

7 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qc4#
    • 1...exd6
      • 2.Qxd6#
    • 1...e5
      • 2.Se7#
    • 1...e6
      • 2.Sf6#
  • Tries
    • 1.Rh5+?
      • 1...e5
        • 2.Sf4#
        • 2.Rxe5#
      • 1...Ke6!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Se5#
        • 2.Sh8#
        • 2.Qf5#
      • 1...Kxc5!
    • 1.Qb7+?
      • 1...Kc5
        • 2.Qxb5#
      • 1...Ke6!
    • 1.dxe7?
      • threat
        • 2.Sf4#
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
      • 1...Ke6!
  • Keys
    • 1.Qc2!
      • 1...Ke6
        • 2.Qb3#
      • 1...exd6
        • 2.Sc7#
      • 1...e5
        • 2.Se7#
      • 1...b4
        • 2.Qc4#
      • 1...e6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAB1(F)
    • P(f);OGATE,XP(C)::QAR1(F),XP(f)
    • P(f);SBLOCK::S(D)
    • P(f);N_GUARD,SBLOCK::S(G)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(F),XP(c)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(C);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(e);::QAR1(F),XP(e)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(d);S_FLIGHT::QAB(F)
      • P(f);SBLOCK,XP(C)::S(G)
      • P(f);SBLOCK::S(D)
      • P(c);N_GUARD::QAB1(F)
      • P(f);SBLOCK::B(B)
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