MESON Chess Problem Database

Problem Display
PID: 255901 (B3R3/3n1q2/4r3/1KbN1P1P/3Pkp2/2PR4/4p1p1/2Q1n1r1 w - - 0 1)

Ellerman, Arnoldo

Wiener Schachzeitung, 1931

(First published on Sat Nov 21 1931)

B3R3/3n1q2/4r3/1KbN1P1P/3Pkp2/2PR4/4p1p1/2Q1n1r1

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Sxf4#
    • 1...Kxf5
      • 2.Qxf4#
    • 1...Sxd3
      • 2.Se3#
  • Tries
    • 1.Qe3+?
      • 1...Kxf5
        • 2.Qxf4#
      • 1...fxe3!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Qxf4#
      • 1...Kxf3
        • 2.Qxf4#
      • 1...Kxf5
        • 2.Qxf4#
      • 1...Qxf5
        • 2.Sf6#
      • 1...Sxf3
        • 2.Qc2#
      • 1...Bd6
        • 2.Se7#
      • 1...Sd3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(e);N_GUARD,N_SPINR(h),S_FLIGHT,XR(C)::S(F),XP(f)
    • K(e);N_GUARD,N_SPINR(h),S_FLIGHT,XP(G)::QAR1(A),XP(f)
    • S(a);SBLOCK,XR(C)::B(I)+S(F)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);N_GUARD,N_SPINR(h),S_FLIGHT,XP(G)::QAR1(A),XP(f)
      • Refutation
        • P(f);XQ(A)
  • Actual
    • R(C);
    • Threat
      • QAR1(A),XP(f)
    • Vars
      • K(e);N_SPINR(h),S_FLIGHT,XR(C)::QAR1(A),XP(f)
      • K(e);N_SPINR(h),P_SPINP(f),S_FLIGHT,XP(G)::QAR1(A),XP(f)
      • Q(j);SBLOCK,XP(G)::B(I)+S(F),DCHECK
      • S(a);N_GUARD,SBLOCK,XR(C)::QAB(A)
      • B(g);::B(I)+S(F)
      • S(a);SBLOCK::B(I)+S(F)
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