MESON Chess Problem Database

Problem Display
PID: 136653 (2B3R1/3rp3/r1n5/3Qpk2/p3R1pP/8/7P/b2K4 w - - 0 1)

Ellerman, Arnoldo

The Field, 1920

(First published on Sat Dec 25 1920)

2B3R1/3rp3/r1n5/3Qpk2/p3R1pP/8/7P/b2K4

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Qxe5#
  • Tries
    • 1.Bxd7+?
      • 1...Kf6
        • 2.Qe6#
      • 1...e6!
    • 1.Re2?
      • threat
        • 2.Rf2#
      • 1...Kf4
        • 2.Rf8#
      • 1...Kf6
        • 2.Rf2#
      • 1...Bd4
        • 2.Qf7#
      • 1...Sd4
        • 2.Qxe5#
      • 1...g3!
  • Keys
    • 1.Re1!
      • threat
        • 2.Rf1#
      • 1...Kf4
        • 2.Rf8#
      • 1...Kf6
        • 2.Rf1#
      • 1...Bd4
        • 2.Qf7#
      • 1...Sd4
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(g);N_PINQ(E)::QAR1(E),XP(d)
  • Tries
    • Try
      • B(F);CHECK,N_SPINQ(E),XR(h)
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT::QAR1(E)
      • Refutation
        • P(i);
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • K(e);N_SPINP(d),N_SPINR(h),P-FLIGHT::R(G)
        • K(e);N_SPINP(d),N_SPINR(h),P-FLIGHT::R(C)
        • B(a);N_PINQ(E)::QAR2(E)
        • S(g);N_PINQ(E)::QAR1(E),XP(d)
      • Refutation
        • P(c);
  • Actual
    • R(C);
    • Threat
      • R(C)
    • Vars
      • K(e);N_SPINP(d),N_SPINR(h),P-FLIGHT::R(G)
      • K(e);N_SPINP(d),N_SPINR(h),P-FLIGHT::R(C)
      • B(a);N_PINQ(E)::QAR2(E)
      • S(g);N_PINQ(E)::QAR1(E),XP(d)
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