MESON Chess Problem Database

Problem Display
PID: 15826 (nK5n/2pp4/2bB2R1/2Nk2r1/1pp4r/4Q1p1/4R3/1q6 w - - 0 1)

Lukyanov, Valentin Volodimirovich

5th HM., Hartong MT, 1988

nK5n/2pp4/2bB2R1/2Nk2r1/1pp4r/4Q1p1/4R3/1q6

#2

6 + 12

3297 FIDE Album (1986-1988) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qe5#
    • 1...Re5
      • 2.Qxe5#
    • 1...Rxg6
      • 2.Qe5#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qc5#
      • 1...Qg1
        • 2.Qxg5#
      • 1...Rd4
        • 2.Qxd4#
      • 1...cxd6!
    • 1.Sb7?
      • threat
        • 2.Qc5#
      • 1...cxd6
        • 2.Rxd6#
      • 1...Qg1
        • 2.Rxg5#
      • 1...Rd4!
    • 1.Sxd7?
      • threat
        • 2.Qc5#
      • 1...cxd6
        • 2.Sf6#
      • 1...Rd4
        • 2.Qe6#
      • 1...Qg1!
    • 1.Rd2+?
      • 1...Rd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Qd3!
    • 1.Rxg5+?
      • 1...Kxd6
        • 2.Qe5#
        • 2.Qe7#
      • 1...Qf5!
    • 1.Qxg5+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Qf5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qc5#
      • 1...cxd6
        • 2.Rxg5#
      • 1...Qg1
        • 2.Sxb4#
      • 1...Rd4
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD::QAR1(B)
    • R(g);N_GUARD::QAR1(B),XR(g)
    • R(g);N_GUARD,XR(E)::QAR1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • Q(a);N_GUARD::QAR(B),XR(g)
        • R(e);N_GUARD::QAR1(B),XR(e)
      • Refutation
        • P(i);XB(D)
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • P(i);OGATE,XB(D)::R1(E),XP(i)
        • Q(a);N_GUARD::R(E),XR(g)
      • Refutation
        • R(e);
    • Try
      • S(C);XP(j)
      • Threat
        • QAR1(B)
      • Vars
        • P(i);SBLOCK,XB(D)::S(C)
        • R(e);SBLOCK::QAB1(B)
      • Refutation
        • Q(a);
    • Try
      • R(A);CHECK
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(E);CHECK,XR(g)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • Q(B);CHECK,XR(g)
      • Vars
        • K(f);P-FLIGHT::QAB1(B)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • P(i);SBLOCK,XB(D)::R(E),XR(g)
      • Q(a);N_GUARD::S(C),XP(c)
      • R(e);SBLOCK::QAR(B),XR(g)
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