MESON Chess Problem Database

Problem Display
PID: 25711 (3Q4/8/2p1K2p/2p5/2kN4/1R6/8/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

1st Prize, Source?, 1979

3Q4/8/2p1K2p/2p5/2kN4/1R6/8/8

#2

4 + 4

2988 Izbrannie Kompozitsi 1985
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Kd6?
      • 1...Kxd4
        • 2.Qh4#
      • 1...cxd4
        • 2.Qg8#
      • 1...h5!
    • 1.Qa5?
      • threat
        • 2.Qc3#
        • 2.Qa4#
      • 1...cxd4
        • 2.Qb4#
      • 1...Kxd4!
    • 1.Qe7?
      • 1...Kxd4
        • 2.Qh4#
      • 1...cxd4
        • 2.Qb4#
      • 1...h5!
    • 1.Qd6?
      • 1...cxd4
        • 2.Qb4#
      • 1...h5!
    • 1.Qb8?
      • 1...Kxd4
        • 2.Qf4#
      • 1...cxd4
        • 2.Qb4#
      • 1...h5!
    • 1.Qf8?
      • 1...Kxd4
        • 2.Qf4#
      • 1...cxd4
        • 2.Qb4#
      • 1...h5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Ke5#
      • 1...Kxd4
        • 2.Qg4#
      • 1...cxd4
        • 2.Kd6#

Anticipated by 138492(1900)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR(D)
        • P(b);SBLOCK,XS(B)::QAB(D)
      • Refutation
        • P(d);
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);N_GUARD,SBLOCK,XS(B)::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • Q(D);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR(D)
        • P(b);OGATE,SBLOCK,XS(B)::QAR1(D)
      • Refutation
        • P(d);
    • Try
      • Q(D);
      • Vars
        • P(b);OGATE,SBLOCK,XS(B)::QAR1(D)
      • Refutation
        • P(d);
    • Try
      • Q(D);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR2(D)
        • P(b);N_GUARD,SBLOCK,XS(B)::QAR1(D)
      • Refutation
        • P(d);
    • Try
      • Q(D);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(B)::QAR2(D)
        • P(b);OGATE,SBLOCK,XS(B)::QAR1(D)
      • Refutation
        • P(d);
  • Actual
    • Q(D);
    • Threat
      • QAB(D)+K(C)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(B)::QAR(D)
      • P(b);SBLOCK,XS(B)::QAB(D)+K(C)
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