MESON Chess Problem Database

Problem Display
PID: 32425 (3B2n1/q3pr1b/p2PrkPQ/2Nn1P2/4PR2/5N2/8/4K3 w - - 0 1)

Gavrilov, G

De Problemist, 1928

3B2n1/q3pr1b/p2PrkPQ/2Nn1P2/4PR2/5N2/8/4K3

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Sd7#
    • 1...Qb8
      • 2.Sd7#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Qa8
      • 2.Sd7#
    • 1...Rxe4+
      • 2.Sxe4#
    • 1...Rxd6
      • 2.e5#
    • 1...Rg7
      • 2.Qg5#
      • 2.Qh4#
    • 1...Rf8
      • 2.Qxf8#
    • 1...Bxg6
      • 2.Qxg6#
    • 1...Sc3
      • 2.fxe6#
    • 1...Sb4
      • 2.fxe6#
    • 1...Sb6
      • 2.fxe6#
    • 1...Sc7
      • 2.Sd7#
      • 2.fxe6#
  • Tries
    • 1.g7+?
      • 1...Bg6
        • 2.Qxg6#
      • 1...Sxh6!
  • Keys
    • 1.dxe7!
      • threat
        • 2.e8S#
      • 1...Rxe4+
        • 2.Sxe4#
      • 1...Qxe7
        • 2.Sd7#
      • 1...Rexe7
        • 2.e5#
      • 1...Rfxe7
        • 2.Qf8#
      • 1...Sdxe7
        • 2.fxe6#
      • 1...Sgxe7
        • 2.gxh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • Q(e);N_GUARD::S(E)
    • Q(e);N_GUARD::S(E),XQ(e)
    • R(c);CHECK,XP(C)::S(E),XR(c)
    • R(c);N_GUARD,N_PINP(C),XP(G)::P(C)
    • R(g);OGATEB::QAR2(I),XR(g)
    • B(h);OGATE,P_SPINB(h),XP(H)::QAR1(I),XB(h)
    • S(a);N_GUARD::R(D)+P(F),XR(c)
  • Tries
    • Try
      • P(H);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(I),XB(h)
      • Refutation
        • S(i);XQ(I)
  • Actual
    • P(G);XP(f)
    • Threat
      • P=S
    • Vars
      • R(c);CHECK,XP(C)::S(E),XR(c)
      • Q(e);N_GUARD,P_SPINQ(e),XP(G)::S(E)
      • R(c);N_GUARD,P_SPINR(c),XP(G)::P(C)
      • R(g);OGATEB,P_SPINR(g),XP(G)::QAR2(I)
      • S(a);N_GUARD,P_SPINS(a),XP(G)::R(D)+P(F),XR(c)
      • S(i);N_GUARD,P_SPINS(i),XP(G)::QAR(I)+P(H),XB(h)
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Developed and maintained by Brian Stephenson.
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