MESON Chess Problem Database

Problem Display
PID: 40548 (1n6/B1pp2N1/7K/R1Pkn1QR/Bp1b1p2/N4P2/1p3p2/2r1r3 w - - 0 1)

Ellerman, Arnoldo

2nd Prize, Israel Problemists' Association, 1953

1n6/B1pp2N1/7K/R1Pkn1QR/Bp1b1p2/N4P2/1p3p2/2r1r3

#2

10 + 12

3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qxe5#
  • Tries
    • 1.Qxf4?
      • threat
        • 2.Qf7#
      • 1...Bxc5
        • 2.Qd2#
      • 1...Bc3
        • 2.Qc4#
      • 1...Be3
        • 2.Rxe5#
      • 1...Rxc5!
    • 1.Qf6?
      • threat
        • 2.Qf7#
      • 1...Rxc5
        • 2.Bb3#
      • 1...Bc3
        • 2.c6#
      • 1...Be3
        • 2.Qxe5#
      • 1...Bxc5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qf7#
      • 1...Rxc5
        • 2.Bb3#
      • 1...Bxc5
        • 2.Qd3#
      • 1...Bc3
        • 2.c6#
      • 1...Be3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD,S_CUTR(b)::QAR1(F),XS(i)
  • Tries
    • Try
      • Q(F);XP(g)
      • Threat
        • QAB(F)
      • Vars
        • B(f);OGATEB,P_SPINB(f),XP(E)::QAR(F)
        • B(f);OGATE::QAB1(F)
        • B(f);N_GUARD,P_PINQ(F),S_CUTR(b)::R1(G),XS(i)
      • Refutation
        • R(a);P_SPINR(a),XP(E)
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XP(E)::B(C)
        • B(f);N_GUARD,S_CUTR(a)::R(D)+P(E)
        • B(f);N_GUARD,S_CUTR(b)::QAR1(F),XS(i)
      • Refutation
        • B(f);P_SPINB(f),XP(E)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • R(a);N_GUARD,P_SPINR(a),XP(E)::B(C)
      • B(f);OGATEB,P_SPINB(f),XP(E)::QAR2(F)
      • B(f);N_GUARD,S_CUTR(a)::R(D)+P(E)
      • B(f);S_CUTR(b)::QAB1(F)
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