MESON Chess Problem Database

Problem Display
PID: 52238 (8/1B1n4/8/8/3QPk1K/2N5/8/8 w - - 0 1)

van Woerden, Jan

Probleemblad, 2004

(First published on Mon Mar 1 2004)

8/1B1n4/8/8/3QPk1K/2N5/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.e5#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Qg3#
      • 1...Kf3
        • 2.Qg3#
      • 1...Ke5!
    • 1.Qg7?
      • threat
        • 2.Qg3#
      • 1...Kf3
        • 2.Qg3#
      • 1...Ke3!
    • 1.Qd2+?
      • 1...Kf3
        • 2.e5#
      • 1...Ke5!
  • Keys
    • 1.Sd1!
      • 1...Kf3
        • 2.Qf2#
      • 1...Sc5
        • 2.Qf6#
      • 1...Se5
        • 2.Qe3#
      • 1...Sb6
        • 2.Qf6#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sb8
        • 2.Qf6#
      • 1...Sf8
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::B(E)+P(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::B(E)+P(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • S(b);N_GUARD::QAR2(B)
      • S(b);SBLOCK::QAB1(B)
      • S(b);N_GUARD::QAR2(B),XS(b)
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