MESON Chess Problem Database

Problem Display
PID: 69263 (8/4Q3/2p2R2/p2pp3/Pp1k4/1P6/3K4/8 w - - 0 1)

van Dijk, Johannes

Tijdschrift vd NSB, 1897

8/4Q3/2p2R2/p2pp3/Pp1k4/1P6/3K4/8

#2

5 + 6

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Rf5?
      • 1...Ke4
        • 2.Qxe5#
      • 1...c5
        • 2.Qxe5#
      • 1...e4!
    • 1.Rxc6?
      • 1...e4
        • 2.Qf6#
        • 2.Qg7#
      • 1...Ke4!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kxc5!
    • 1.Qa7+?
      • 1...Ke4
        • 2.Qe3#
      • 1...c5!
    • 1.Qh7?
      • 1...Kc5
        • 2.Qa7#
      • 1...c5
        • 2.Qd3#
      • 1...e4!
  • Keys
    • 1.Qg7!
      • 1...Ke4
        • 2.Qg4#
      • 1...Kc5
        • 2.Qa7#
      • 1...e4
        • 2.Rxc6#
      • 1...c5
        • 2.Rf4#

This anticipates 151470(1908)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(e)::QAR1(E),XP(e)
        • P(f);SBLOCK::QAB1(E),XP(e)
      • Refutation
        • P(e);
    • Try
      • R(D);XP(f)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(e)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
        • P(f);SBLOCK::QAR1(E)
      • Refutation
        • P(e);
  • Actual
    • Q(E);
    • Vars
      • K(b);P-FLIGHT::QAR2(E)
      • K(b);S_FLIGHT::QAB(E)
      • P(e);OGATEB,SBLOCK::QAB(E)+R(D),XP(f)
      • P(f);SBLOCK::R(D)
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