MESON Chess Problem Database

Problem Display
PID: 268561 (8/K7/2k2N1R/BpNnpp2/1p4Q1/8/2R3qb/6rB w - - 0 1)

Segers, Marcel

British Chess Magazine, 1934

8/K7/2k2N1R/BpNnpp2/1p4Q1/8/2R3qb/6rB

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sxd5#
      • 2.Sh5#
      • 2.Sfd7#
      • 2.Sh7#
      • 2.Se8#
      • 2.Sg8#
    • 1...Qh3
      • 2.Sh5#
    • 1...Qxc2
      • 2.Sfd7#
    • 1...Qe2
      • 2.Sxd5#
      • 2.Sh5#
      • 2.Sfd7#
      • 2.Sh7#
      • 2.Se8#
      • 2.Sg8#
    • 1...Qf2
      • 2.Sxd5#
      • 2.Sh5#
      • 2.Sd7#
      • 2.Sh7#
      • 2.Se8#
      • 2.Sg8#
    • 1...Qg3
      • 2.Sxd5#
      • 2.Sh5#
      • 2.Sfd7#
      • 2.Sh7#
      • 2.Se8#
      • 2.Sg8#
    • 1...Qxg4
      • 2.Sxg4#
    • 1...Sf4
      • 2.Sb7#
    • 1...Sc7
      • 2.Sb7#
    • 1...Se7
      • 2.Sb7#
    • 1...f4
      • 2.Qe6#
      • 2.Qd7#
  • Tries
    • 1.Sb7+?
      • 1...Qxc2
        • 2.Bxd5#
      • 1...Sc3!
    • 1.Qg7?
      • threat
        • 2.Qd7#
      • 1...Qxg7+
        • 2.Sb7#
      • 1...Kd6
        • 2.Sfe4#
        • 2.Se8#
        • 2.Qd7#
      • 1...Qxc2
        • 2.Qc7#
      • 1...Sc3
        • 2.Qc7#
      • 1...Se7
        • 2.Sb7#
      • 1...Sb6!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qe6#
      • 1...Qg7+
        • 2.Sb7#
      • 1...Kd6
        • 2.Qe6#
      • 1...Qxc2
        • 2.Qxd5#
      • 1...Qxg8
        • 2.Sb7#
      • 1...Sc3
        • 2.Sfd7#
      • 1...Sb6
        • 2.Se8#
      • 1...Sf4
        • 2.Sb7#
      • 1...Sc7
        • 2.Sb7#
      • 1...e4
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(b);P_SPINS(f)::R(G)+S(F)
    • Q(b);P_SPINS(f),XR(B)::R(G)+S(F)
    • Q(b);P_SPINS(f),XQ(C)::R(G)+S(F),XQ(b)
    • S(f);N_GUARD,P_SPINQ(b)::R(B)+S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(b);OGATE,P_SPINS(f),XR(B)::B(A),XS(f)
      • Refutation
        • S(f);P_SPINQ(b),P_SPINS(f)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • Q(b);CHECK,N_GUARD,P_SPINS(f),XQ(C)::R(B)+S(E)
        • Q(b);P_SPINS(f),XR(B)::QAR1(C)
        • S(f);N_GUARD,P_SPINQ(b)::QAR1(C)
        • S(f);N_GUARD,P_SPINQ(b)::R(B)+S(E)
      • Refutation
        • S(f);P_SPINQ(b)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • Q(b);CHECK,N_GUARD,P_SPINS(f)::R(B)+S(E)
      • K(i);P-FLIGHT::QAR1(C)
      • Q(b);N_GUARD,P_SPINS(f),XR(B)::QAB1(C),XS(f)
      • Q(b);N_GUARD,P_SPINS(f),XQ(C)::R(B)+S(E)
      • S(f);N_GUARD,P_SPINQ(b)::R(G)+S(F)
      • S(f);N_GUARD,P_SPINQ(b)::R(B)+S(E)
      • P(g);S_CUTQ(b)::QAB1(C),XS(f)
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