MESON Chess Problem Database

Problem Display
PID: 56643 (8/1R5n/2p5/2k3N1/4Q3/K7/8/8 w - - 0 1)

Labai, Zoltan

2nd Prize, Slovenska Organizacia Kompozicneho Sachu, 1997-1998

8/1R5n/2p5/2k3N1/4Q3/K7/8/8

#2

4 + 3

5417 FIDE Album (1995-1997) 2004
5454 Near Snap 2007
23 Die Schwalbe 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd4#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qe5#
      • 1...Kd6
        • 2.Qd4#
      • 1...Sf6!
    • 1.Rb4?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Sf6
        • 2.Qd4#
      • 1...Kd6!
    • 1.Qd3?
      • threat
        • 2.Se4#
        • 2.Se6#
      • 1...Sf6
        • 2.Se6#
      • 1...Sf8
        • 2.Se4#
      • 1...Sxg5!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Sf7#
        • 2.Qd4#
      • 1...Kxc4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qd4#
      • 1...Kd6
        • 2.Qe5#

Anticipated by 12423(1979), 15720(1987)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR2(B)
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • S(c);
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::S(C)
      • Refutation
        • S(c);XS(C)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
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