MESON Chess Problem Database

Problem Display
PID: 225345 (2N5/8/8/8/pkN5/8/4Q3/2K5 w - - 0 1)

Reiprich, Gejza

Praca, 1948

2N5/8/8/8/pkN5/8/4Q3/2K5

#2

4 + 2

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Se5?
      • 1...Ka3
        • 2.Qb2#
      • 1...Kb3
        • 2.Qb2#
      • 1...Kc3
        • 2.Qc4#
        • 2.Qb2#
      • 1...Ka5
        • 2.Sc6#
      • 1...Kc5
        • 2.Qc4#
      • 1...a3!
    • 1.S4d6?
      • 1...Ka3
        • 2.Qb2#
      • 1...Kb3
        • 2.Qb2#
      • 1...Kc3
        • 2.Qc4#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qc4#
      • 1...a3!
  • Keys
    • 1.Sa3!
      • 1...Kxa3
        • 2.Qb2#
      • 1...Kb3
        • 2.Qb2#
      • 1...Kc3
        • 2.Qc4#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qc4#

Anticipated by 223105(1886), 76322(1927)

This anticipates 48016(1993), 152906(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::S(C)
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • S(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • P(a);
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT,XS(C)::QAB1(B)
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);S_FLIGHT::QAR1(B)
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