MESON Chess Problem Database

Problem Display
PID: 66150 (4K3/2p1R3/3k4/1Q6/4p3/8/8/3r4 w - - 0 1)

Sovik, Stefan

3rd Prize, Match: Slovakia - Ukraine, 1999

4K3/2p1R3/3k4/1Q6/4p3/8/8/3r4

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qd7#
    • 1...c6
      • 2.Qe5#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Re6#
        • 2.Rd7#
      • 1...c5
        • 2.Qd7#
      • 1...Rd5
        • 2.Re6#
      • 1...c6
        • 2.Qe5#
      • 1...Rf1+!
    • 1.Qc4?
      • threat
        • 2.Re6#
      • 1...c5
        • 2.Qe6#
      • 1...Rd5
        • 2.Qxc7#
      • 1...c6!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qc5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...c5
        • 2.Qxc5#
      • 1...c6
        • 2.Qb8#
      • 1...Rc1
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::QAR1(A)
    • P(d);SBLOCK::QAB1(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(d);SBLOCK::QAR1(A)
        • R(a);::R1(B)
        • P(d);SBLOCK::QAB1(A)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(A);
      • Threat
        • R1(B)
      • Vars
        • P(d);SBLOCK::QAR1(A)
        • R(a);SBLOCK::QAB1(A),XP(d)
      • Refutation
        • P(d);
  • Actual
    • R(B);
    • Threat
      • QAB1(A)
    • Vars
      • R(a);N_GUARD::QAR1(A),XR(a)
      • P(d);::QAB1(A),XP(d)
      • P(d);OGATEB,SBLOCK::QAB(A)
      • R(a);N_GUARD::QAR1(A)
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