MESON Chess Problem Database

Problem Display
PID: 248981 (BQ1K4/B7/rn3p1p/1NRP4/p3kpP1/2p2NR1/b1P1Pp2/4r3 w - - 0 1)

Ellerman, Arnoldo

Jerusalem Post, 1951

(First published on Fri Mar 9 1951)

BQ1K4/B7/rn3p1p/1NRP4/p3kpP1/2p2NR1/b1P1Pp2/4r3

#2

12 + 11

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Rc7?
      • threat
        • 2.Re7#
      • 1...Ke3
        • 2.Re7#
      • 1...Sxd5
        • 2.Sxc3#
      • 1...Sxa8
        • 2.Sxc3#
      • 1...Sc4
        • 2.Sxc3#
      • 1...Sd7
        • 2.Sxc3#
      • 1...Sc8
        • 2.Sxc3#
      • 1...Rxa7!
    • 1.e3?
      • threat
        • 2.Qxf4#
      • 1...Rxe3
        • 2.Sd6#
      • 1...fxe3
        • 2.Sxc3#
      • 1...fxg3
        • 2.Qf4#
      • 1...Kxe3!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Re6#
      • 1...Ke3
        • 2.Re6#
      • 1...Kxd5
        • 2.Sxc3#
      • 1...Sxd5
        • 2.Sd6#
      • 1...Sxa8
        • 2.Sxc3#
      • 1...Sc4
        • 2.Sxc3#
      • 1...Sd7
        • 2.Sxc3#
      • 1...Sc8
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(j);N_GUARD::QAR1(K)
  • Tries
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • K(f);P-FLIGHT,P_SPINS(i)::R(G)
        • S(i);P_SPINS(i),XP(H)::S(F),XP(d)
        • S(i);XB(J)::S(F),XP(d)
        • S(i);::S(F),XP(d)
      • Refutation
        • R(h);XB(I)
    • Try
      • P(B);
      • Threat
        • QAR1(K),XP(g)
      • Vars
        • R(a);SBLOCK,XP(B)::S(F)
        • P(g);SBLOCK,XP(B)::S(F),XP(d)
        • P(g);XR(D)::QAR1(K)
      • Refutation
        • K(f);P-FLIGHT,XP(B)
  • Actual
    • R(G);
    • Threat
      • R(G)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(i)::R(G)
      • K(f);S_FLIGHT,XP(H)::S(F),XP(d)
      • S(i);SBLOCK,XP(H)::S(F)
      • S(i);XB(J)::S(F),XP(d)
      • S(i);::S(F),XP(d)
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