MESON Chess Problem Database

Problem Display
PID: 251873 (3B3Q/3R1pr1/PNk5/np3p2/PP2r3/3KpB2/8/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

5th HM., Schach, 1993

3B3Q/3R1pr1/PNk5/np3p2/PP2r3/3KpB2/8/8

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qf6#
    • 1...Rg2
      • 2.Qf6#
    • 1...Rg3
      • 2.Qf6#
    • 1...Rg4
      • 2.Qf6#
    • 1...Rg5
      • 2.Qf6#
    • 1...Rh7
      • 2.Qf6#
    • 1...Rg8
      • 2.Qf6#
    • 1...f4
      • 2.Bxe4#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Qe8#
      • 1...Rg8
        • 2.Qf6#
      • 1...f6!
    • 1.Qh6+?
      • 1...f6
        • 2.Qxf6#
      • 1...Rg6!
    • 1.Qe8?
      • threat
        • 2.Rd4#
      • 1...f6
        • 2.Qe6#
      • 1...Rg8!
    • 1.Qf8?
      • threat
        • 2.Rd6#
        • 2.Qc5#
        • 2.Qd6#
      • 1...bxa4
        • 2.Qc5#
      • 1...Rg6
        • 2.Qc5#
      • 1...Sb3
        • 2.Rd6#
        • 2.Qd6#
      • 1...Sc4
        • 2.Qc5#
      • 1...Sb7!
  • Keys
    • 1.Rd5!
      • threat
        • 2.axb5#
      • 1...Rd4+
        • 2.Rxd4#
      • 1...Rxb4
        • 2.Qe8#
      • 1...bxa4
        • 2.b5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(h);OGATE::QAR(I)
    • P(e);N_GUARD::B(B),XR(b)
  • Tries
    • Try
      • R(G);
      • Threat
        • QAB(I)
      • Vars
        • R(h);OGATE::QAR(I)
      • Refutation
        • P(g);
    • Try
      • Q(I);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAR(I),XP(g)
      • Refutation
        • R(h);
    • Try
      • Q(I);
      • Threat
        • QAB(I)+R(G)
      • Vars
        • P(g);N_GUARD::QAR2(I)
      • Refutation
        • R(h);
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);XP(C)::QAR1(I)
        • R(h);::QAR1(I)
        • S(c);::QAR1(I)
      • Refutation
        • S(c);
  • Actual
    • R(G);N_PINR(b)
    • Threat
      • P(C),XP(d)
    • Vars
      • R(b);CHECK,OGATEB::B(B)+R(G),XR(b)
      • R(b);N_GUARD,XP(D)::QAB(I)
      • P(d);OGATE,XP(C)::P(D)
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