MESON Chess Problem Database

Problem Display
PID: 139852 (Kb6/1p2rpp1/6p1/R3PkN1/2Q1Nr2/7P/5n2/1B3R2 w - - 0 1)

de Jong, J

Probleemblad, 1974

Kb6/1p2rpp1/6p1/R3PkN1/2Q1Nr2/7P/5n2/1B3R2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Qxf7#
      • 2.Qc8#
    • 1...Re8
      • 2.Qxf7#
  • Tries
    • 1.Sxf2+?
      • 1...Re4
        • 2.Sfxe4#
      • 1...Kxg5!
    • 1.Sh7?
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...Rxe4
        • 2.Rxf2#
      • 1...Sxh3
        • 2.Sef6#
      • 1...Sxe4
        • 2.Bxe4#
      • 1...Bd6
        • 2.Sg3#
        • 2.Sxd6#
      • 1...Sd3
        • 2.Sg3#
      • 1...b5!
    • 1.Qc8+?
      • 1...Rd7
        • 2.Qxd7#
      • 1...Re6!
  • Keys
    • 1.Sxf7!
      • threat
        • 2.Sg3#
        • 2.Sed6#
      • 1...Rxe4
        • 2.Rxf2#
      • 1...Rxe5
        • 2.Qc8#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Bxe5
        • 2.Sfd6#
      • 1...Sxh3
        • 2.Sf6#
      • 1...Sxe4
        • 2.Bxe4#
      • 1...Bd6
        • 2.Sg3#
        • 2.Sexd6#
        • 2.Sfxd6#
      • 1...Sd3
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(f);N_GUARD::QAR2(D),XP(g)
  • Tries
    • Try
      • S(E);CHECK,XS(a)
      • Vars
        • R(b);P_SPINR(b)::R(B)+S(E),XR(b)
      • Refutation
        • K(c);P-FLIGHT,XS(H)
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);OGATEB,P_SPINR(b),P_SPINS(a),XS(E)::R(B),XS(a)
        • S(a);N_GUARD,P_SPINR(b),XP(C)::B(A)+S(E)
        • S(a);OGATE,P_SPINR(b),P_SPINS(a),XS(E)::B(A),XS(a)
        • S(a);P_SPINR(b)::S(E)
      • Refutation
        • P(e);
    • Try
      • Q(D);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB(D),XR(f)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • S(H);XP(g)
    • Threat
      • DUALS(2)
    • Vars
      • R(b);OGATEB,P_SPINR(b),P_SPINS(a),XS(E)::R(B),XS(a)
      • R(f);N_GUARD,P_SPINR(f),XP(G)::QAB(D)
      • R(f);OGATE,XS(H)::QAR2(D),XR(f)
      • B(i);N_GUARD,P_SPINB(i),XP(G)::S(H)
      • S(a);N_GUARD,P_SPINR(b),XP(C)::B(A)+S(E)
      • S(a);OGATE,P_SPINR(b),P_SPINS(a),XS(E)::B(A),XS(a)
      • S(a);P_SPINR(b)::S(E)
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