MESON Chess Problem Database

Problem Display
PID: 44083 (2N2RK1/P1k5/4P3/P1N3p1/Br6/3bp2Q/8/8 w - - 0 1)

Gavrilov, Constantin Grigorievich

Het Schaakleven, 1931

2N2RK1/P1k5/4P3/P1N3p1/Br6/3bp2Q/8/8

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Qh2#
      • 2.Qg3#
    • 1...Rb2
      • 2.Qg3#
    • 1...Rb3
      • 2.Qh2#
      • 2.Qg3#
    • 1...Re4
      • 2.Qh7#
    • 1...Rb6
      • 2.axb6#
    • 1...Rb7
      • 2.Qh2#
      • 2.Qg3#
    • 1...Rb8
      • 2.Qh2#
      • 2.Qg3#
    • 1...Bf1
      • 2.Qh7#
    • 1...Be2
      • 2.Qh7#
    • 1...Bc4
      • 2.Qh2#
      • 2.Qg3#
      • 2.Qh7#
    • 1...Be4
      • 2.Qh2#
      • 2.Qg3#
    • 1...Ba6
      • 2.Qh7#
    • 1...Bh7+
      • 2.Qxh7#
  • Tries
    • 1.Sa6+?
      • 1...Bxa6
        • 2.Qh7#
      • 1...Kb7!
    • 1.Qf3?
      • threat
        • 2.Qc6#
        • 2.Qf7#
      • 1...Rxa4
        • 2.Qb7#
      • 1...Rd4
        • 2.Qc6#
        • 2.Qb7#
      • 1...Re4
        • 2.Qf7#
      • 1...Rf4
        • 2.Qc6#
        • 2.Qb7#
      • 1...Rb5
        • 2.Sa6#
      • 1...Rb6
        • 2.Qf7#
        • 2.axb6#
      • 1...Be4
        • 2.Qg3#
        • 2.Qf7#
      • 1...Bb5
        • 2.Qb7#
      • 1...Bf5
        • 2.Sa6#
        • 2.Qc6#
      • 1...Bg6
        • 2.Sa6#
        • 2.Qc6#
      • 1...Bh7+!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qc6#
      • 1...Bh7+
        • 2.Qxh7#
      • 1...Rxa4
        • 2.Qb7#
      • 1...Re4
        • 2.Qh7#
      • 1...Rb5
        • 2.Sa6#
      • 1...Rb6
        • 2.axb6#
      • 1...Be4
        • 2.Qh2#
      • 1...Bb5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::QAB(A)
    • R(c);S_CUTB(a)::QAR(A)
    • R(c);OGATE::P(C),XR(c)
    • B(a);N_GUARD::QAR(A)
    • B(a);CHECK,N_GUARD::QAR(A),XB(a)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • B(a);XS(D)::QAR(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_GUARD,XB(B)::QAR1(A)
        • R(c);::QAR(A)
        • R(c);S_CUTB(a)::S(D)
        • B(a);S_CUTR(c)::QAR1(A)
      • Refutation
        • B(a);CHECK
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,N_GUARD::QAR(A),XB(a)
      • R(c);N_GUARD,XB(B)::QAR1(A)
      • R(c);S_CUTB(a)::QAR(A)
      • R(c);S_CUTB(a)::S(D)
      • R(c);OGATE::P(C),XR(c)
      • B(a);S_CUTR(c)::QAB(A)
      • B(a);S_CUTR(c)::QAR1(A)
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