MESON Chess Problem Database

Problem Display
PID: 137246 (2K5/Q3Rp2/2pk4/3P4/8/8/8/8 w - - 0 1)

Nikitin, Vladimir V

Freie Presse, 1999

2K5/Q3Rp2/2pk4/3P4/8/8/8/8

#2

4 + 3

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...cxd5
      • 2.Qc7#
    • 1...c5
      • 2.Qd7#
  • Tries
    • 1.Re5?
      • threat
        • 2.Qe7#
      • 1...cxd5
        • 2.Qc7#
      • 1...Kxe5!
  • Keys
    • 1.Qa5!
      • 1...Kxe7
        • 2.Qd8#
      • 1...cxd5
        • 2.Qc7#
      • 1...c5
        • 2.Qd8#
      • 1...f5
        • 2.Re6#
      • 1...f6
        • 2.Re6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK,XP(A)::QAB1(B)
    • P(a);SBLOCK::QAR1(B)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • P(a);XP(A)::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT,XR(C)::QAB1(B)
      • P(a);SBLOCK,XP(A)::QAB1(B)
      • P(a);SBLOCK::QAR2(B)
      • P(c);N_GUARD::R1(C)
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