MESON Chess Problem Database

Problem Display
PID: 120700 (5K2/1p4p1/pPk5/7R/8/8/8/1Q6 w - - 0 1)

Pospisil, Josef

Besedy lidus, 1913

5K2/1p4p1/pPk5/7R/8/8/8/1Q6

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Ke7?
      • threat
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...g5!
    • 1.Ke8?
      • threat
        • 2.Qg6#
      • 1...Kd6
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...g5!
    • 1.Qb5+?
      • 1...Kd6
        • 2.Qd5#
      • 1...axb5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qe6#
      • 1...Kxb6
        • 2.Qc5#
      • 1...Kd6
        • 2.Qd5#
      • 1...g5
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • P(d);::QAR(A),XP(d)
      • Refutation
        • P(d);
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • P(d);::QAR(A),XP(d)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);P-FLIGHT,XP(C)::QAB1(A)
      • K(b);P-FLIGHT::QAR1(A)
      • P(d);N_GUARD::R(B)
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