MESON Chess Problem Database

Problem Display
PID: 249151 (1b4K1/3p1R2/4k3/2P5/3Q4/8/8/8 w - - 0 1)

Roosendaal, Jan C

The Problemist, 1990

1b4K1/3p1R2/4k3/2P5/3Q4/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxd7#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Ba7
      • 2.Qe4#
      • 2.Qd6#
    • 1...d5
      • 2.Qf6#
    • 1...d6
      • 2.Qe4#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qf5#
      • 1...Be5
        • 2.Qxd7#
      • 1...Ke5!
  • Keys
    • 1.Kf8!
      • threat
        • 2.Rf6#
      • 1...Bd6+
        • 2.Qxd6#
      • 1...Be5
        • 2.Qxd7#
      • 1...d5
        • 2.Qf6#
      • 1...d6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::QAB1(A),XP(b)
    • B(c);N_GUARD::QAR1(A),XB(c)
    • P(b);SBLOCK::QAR1(A)
    • P(b);S_CUTB(c)::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(c);SBLOCK::QAB1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • R1(C)
    • Vars
      • B(c);CHECK,N_GUARD::QAR1(A),XB(c)
      • B(c);SBLOCK::QAB1(A),XP(b)
      • P(b);SBLOCK::QAR1(A)
      • P(b);S_CUTB(c)::QAR2(A)
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