MESON Chess Problem Database

Problem Display
PID: 30294 (2K1Nb2/7Q/3P1p2/3R1r1p/4k2q/3R3b/3PNpp1/8 w - - 0 1)

Ellerman, Arnoldo

3rd Prize, American Chess Bulletin, 1921

2K1Nb2/7Q/3P1p2/3R1r1p/4k2q/3R3b/3PNpp1/8

#2

8 + 9

3364 Solving in Style 1985
259 Thema Danicum 1996
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Sxf6#
    • 1...Qf4
      • 2.Sc3#
      • 2.Sxf6#
    • 1...Qg4
      • 2.Sxf6#
    • 1...Bxd6
      • 2.Sxd6#
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qa4#
      • 1...Rxd5
        • 2.Re3#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Rf3
        • 2.R3d4#
      • 1...Rf4
        • 2.Sc3#
      • 1...Re5
        • 2.R5d4#
      • 1...Rg5
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD::S(H),XP(h)
    • B(i);XP(E)::S(H),XB(i)
  • Actual
    • Q(F);N_PINR(f)
    • Threat
      • QAR(F)
    • Vars
      • R(f);P_PINQ(F),SBLOCK,XR(D)::R1(C)
      • B(i);XP(E)::S(H),XB(i)
      • R(f);P_PINQ(F),SBLOCK::R1(C)
      • R(f);P_PINQ(F),SBLOCK::S(B)
      • R(f);P_PINQ(F),SBLOCK::R1(D)
      • R(f);N_GUARD,P_PINQ(F),S_CUTQ(e)::S(H),XP(h)
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