MESON Chess Problem Database

Problem Display
PID: 90126 (8/8/8/8/4Q3/pk6/8/R3K3 w Q - 0 1)

Sujitno, K

Die Schwalbe, 1964

8/8/8/8/4Q3/pk6/8/R3K3

#2

3 + 2

6490 yacpdb 2009
3713 Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kd2?
      • 1...Kb2
        • 2.Qb1#
      • 1...a2!
    • 1.Rb1+?
      • 1...Ka2
        • 2.Qc2#
      • 1...Kc3!
    • 1.Rc1?
      • 1...Ka2
        • 2.Qb1#
        • 2.Qc2#
      • 1...Kb2
        • 2.Qb1#
        • 2.Qc2#
      • 1...a2!
  • Keys
    • 1.0-0-0!
      • 1...Ka2
        • 2.Qb1#
      • 1...Kc3
        • 2.Rd3#
      • 1...a2
        • 2.Rd3#

This anticipates 254965(2006)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • P(a);
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(A);
      • Refutation
        • P(a);
  • Actual
    • K(B);0-0-0
    • Vars
      • K(b);S_FLIGHT::QAB1(C)
      • K(b);P-FLIGHT::R1(A)
      • P(a);SBLOCK::R(A)
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