MESON Chess Problem Database

Problem Display
PID: 177929 (8/3p3K/1Np4N/2P1kPBp/p2pp3/8/4b3/bQ6 w - - 0 1)

Cyrulik, Stepan Pavlovich

6th Comm., Sahs (Latvia), 1988

8/3p3K/1Np4N/2P1kPBp/p2pp3/8/4b3/bQ6

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxa1#
    • 1...e3
      • 2.Sf7#
    • 1...d5
      • 2.Sd7#
  • Tries
    • 1.Kg6?
      • threat
        • 2.Sf7#
      • 1...d3
        • 2.Qxa1#
      • 1...Bc4!
    • 1.Qa2?
      • threat
        • 2.Sxd7#
      • 1...d3
        • 2.Qxa1#
      • 1...Bc4
        • 2.Qh2#
      • 1...d5
        • 2.Sd7#
      • 1...d6
        • 2.Sd7#
        • 2.Qe6#
      • 1...e3!
    • 1.Qc1?
      • threat
        • 2.Qf4#
      • 1...d3
        • 2.Qxa1#
      • 1...e3!
    • 1.Qg1?
      • threat
        • 2.Qh2#
        • 2.Qg3#
      • 1...d3
        • 2.Qxa1#
      • 1...h4
        • 2.Qh2#
      • 1...e3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh2#
      • 1...d3
        • 2.Qxa1#
      • 1...e3
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATEB::QAB(A),XB(a)
    • P(e);::S(F)
    • P(i);SBLOCK::S(E)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Threat
        • S(F)
      • Vars
        • P(d);OGATEB::QAB(A),XB(a)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • S(E),XP(i)
      • Vars
        • P(d);OGATEB::QAB(A),XB(a)
        • B(b);OGATE::QAB(A)
        • P(i);::S(E)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);OGATEB::QAB(A),XB(a)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATEB::QAB(A),XB(a)
        • P(g);::QAB(A)
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(d);OGATEB::QAB(A),XB(a)
      • P(e);::S(E),XP(i)
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