MESON Chess Problem Database

Problem Display
PID: 60910 (5b2/8/5RR1/5p1k/5pqp/7p/4QN1K/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

5th HM., Chervoni Girnik, 1998

5b2/8/5RR1/5p1k/5pqp/7p/4QN1K/8

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxf3#
  • Tries
    • 1.Rxg4?
      • threat
        • 2.Qe8#
      • 1...fxg4
        • 2.Qxg4#
        • 2.Qe5#
      • 1...Be7!
    • 1.Rh6+?
      • 1...Kg5
        • 2.Rfg6#
      • 1...Bxh6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Rxg4#
      • 1...Qg1+
        • 2.Rxg1#
      • 1...Qg2+
        • 2.Rxg2#
      • 1...Qg3+
        • 2.Rxg3#
      • 1...Qxg6
        • 2.Qxg6#
      • 1...Qd1
        • 2.Rxf5#
        • 2.Rg1#
        • 2.Rg2#
        • 2.Rg3#
        • 2.Rg4#
        • 2.Rg7#
        • 2.Rg8#
      • 1...Qe2
        • 2.Rxf5#
      • 1...Qf3
        • 2.Rxf5#
        • 2.Rg1#
        • 2.Rg2#
        • 2.Rg3#
        • 2.Rg4#
        • 2.Rg7#
        • 2.Rg8#
      • 1...Qg5
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATEB::QAB(A),XQ(c)
  • Tries
    • Try
      • R(E);XQ(c)
      • Threat
        • QAB(A)
      • Refutation
        • B(g);
    • Try
      • R(E);CHECK
      • Vars
        • K(f);N_SPINQ(c),P-FLIGHT::R1(D)
      • Refutation
        • B(g);XR(E)
  • Actual
    • Q(A);N_PINQ(c)
    • Threat
      • QAB(A)+R(E),XQ(c)
    • Vars
      • Q(c);CHECK,OGATE::QAB(A)+R(E),XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XR(E)::QAB1(A),XQ(c)
      • Q(c);N_GUARD,P_PINS(B)::R(D),XP(e)
      • Q(c);SBLOCK::QAB(A)+R(E),DCHECK
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