MESON Chess Problem Database

Problem Display
PID: 269225 (8/1K2p3/3p4/3k4/R5P1/8/8/6Q1 w - - 0 1)

Petrasinovic, Petrasin

Magyar Sakkvilag, 2021

8/1K2p3/3p4/3k4/R5P1/8/8/6Q1

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...e6
      • 2.Qd4#
  • Tries
    • 1.Qf2?
      • 1...Ke5
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...e6
        • 2.Qd4#
      • 1...e5!
    • 1.Qe3?
      • 1...e6
        • 2.Qd4#
      • 1...e5!
    • 1.Qe1?
      • 1...Kc5
        • 2.Qa5#
      • 1...e6
        • 2.Qa5#
      • 1...e5!
  • Keys
    • 1.Qf1!
      • 1...Kc5
        • 2.Qc4#
      • 1...Ke5
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...e5
        • 2.Qc4#
      • 1...e6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT,S_CUTP(c)::QAR1(A)
        • K(a);S_CUTP(c),S_FLIGHT::QAB1(A)
        • P(c);SBLOCK::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • P(c);SBLOCK::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(A)
        • P(c);SBLOCK::QAR(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAR1(A)
      • K(a);P-FLIGHT,S_CUTP(c)::QAR1(A)
      • K(a);S_CUTP(c),S_FLIGHT::QAB1(A)
      • P(c);SBLOCK::QAB1(A)
      • P(c);SBLOCK::QAR2(A)
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