MESON Chess Problem Database

Problem Display
PID: 250829 (3q3b/3p3p/3Pp2Q/4kN1N/1BPp1R2/1K1P1p2/2P3rn/R7 w - - 0 1)

Kirillov, Valery Afanasievich

Maslov, N

Uralski Problemist, 2010

3q3b/3p3p/3Pp2Q/4kN1N/1BPp1R2/1K1P1p2/2P3rn/R7

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Ra5#
    • 1...Qa5
      • 2.Rxa5#
    • 1...Qg5
      • 2.Ra5#
    • 1...Qf6
      • 2.Ra5#
    • 1...Qe7
      • 2.Ra5#
    • 1...Qe8
      • 2.Ra5#
    • 1...Qf8
      • 2.Ra5#
    • 1...Qg8
      • 2.Ra5#
    • 1...Rg3
      • 2.Re1#
    • 1...Rg4
      • 2.Re1#
    • 1...Rg5
      • 2.Re1#
    • 1...Rg6
      • 2.Re1#
    • 1...Rg7
      • 2.Re1#
    • 1...Rg8
      • 2.Re1#
  • Tries
    • 1.Sfg3?
      • threat
        • 2.Re4#
      • 1...Rxg3
        • 2.Re1#
      • 1...Qh4
        • 2.Ra5#
      • 1...Qa8
        • 2.Qg5#
      • 1...Re2!
    • 1.Se7?
      • threat
        • 2.Re4#
      • 1...Qxe7
        • 2.Ra5#
      • 1...Re2
        • 2.Qg5#
      • 1...Rg4
        • 2.Re1#
      • 1...Qa8!
    • 1.Qg7+?
      • 1...Qf6
        • 2.Ra5#
      • 1...Rxg7
        • 2.Re1#
      • 1...Bxg7!
    • 1.Qf6+?
      • 1...Qxf6
        • 2.Ra5#
      • 1...Bxf6!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Re4#
      • 1...Qxg5
        • 2.Ra5#
      • 1...Rxg5
        • 2.Re1#
      • 1...Re2
        • 2.Se7#
      • 1...Qa8
        • 2.Sfg3#
      • 1...Rg4
        • 2.Re1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • Q(i);N_GUARD::R(A)
    • Q(i);N_GUARD::R(A),XQ(i)
    • R(a);N_GUARD::R(A)
  • Tries
    • Try
      • S(H);
      • Threat
        • R1(G)
      • Vars
        • R(a);N_GUARD,XS(H)::R(A)
        • Q(i);N_GUARD::R(A)
        • Q(i);N_GUARD::QAR2(K)
      • Refutation
        • R(a);
    • Try
      • S(H);
      • Threat
        • R1(G)
      • Vars
        • Q(i);N_GUARD,XS(H)::R(A)
        • R(a);N_GUARD::QAR2(K)
        • R(a);N_GUARD::R(A)
      • Refutation
        • Q(i);
    • Try
      • Q(K);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::R(A)
        • R(a);XQ(K)::R(A)
      • Refutation
        • B(j);XQ(K)
    • Try
      • Q(K);CHECK
      • Vars
        • Q(i);XQ(K)::R(A)
      • Refutation
        • B(j);XQ(K)
  • Actual
    • Q(K);
    • Threat
      • R1(G)
    • Vars
      • Q(i);N_GUARD,XQ(K)::R(A)
      • R(a);N_GUARD,XQ(K)::R(A)
      • R(a);N_GUARD::QAR(K)+S(H)
      • Q(i);N_GUARD::QAR(K)+S(H)
      • R(a);N_GUARD::R(A)
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