MESON Chess Problem Database

Problem Display
PID: 205685 (8/5p1p/8/7k/5K1p/4Q3/8/8 w - - 0 1)

Sola, Pentti Olavi

Karjala, 1925

8/5p1p/8/7k/5K1p/4Q3/8/8

#2

2 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kf5?
      • threat
        • 2.Qg5#
      • 1...h6
        • 2.Qe2#
        • 2.Qf3#
      • 1...f6!
    • 1.Qg1?
      • threat
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...h6
        • 2.Qg4#
      • 1...f6!
    • 1.Qc5+?
      • 1...Kg6
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...f5!
    • 1.Qe5+?
      • 1...Kg6
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...f5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qg5#
      • 1...Kg6
        • 2.Qg5#
      • 1...Kh6
        • 2.Qg5#
      • 1...f6
        • 2.Qxh7#
      • 1...h6
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • P(d);SBLOCK::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);P-FLIGHT::QAB1(A)
      • P(c);OGATE::QAR2(A),XP(d)
      • P(d);SBLOCK::QAB(A),XP(c)
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