MESON Chess Problem Database

Problem Display
PID: 155651 (5r1B/2Qr4/3n2p1/3p4/2p1kpN1/5p1B/3R4/4bN1K w - - 0 1)

Ellerman, Arnoldo

Deutsche Schachzeitung, 1955

5r1B/2Qr4/3n2p1/3p4/2p1kpN1/5p1B/3R4/4bN1K

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Rd4#
    • 1...Bxd2
      • 2.Sf2#
    • 1...Bf2
      • 2.Sxf2#
    • 1...Sb5
      • 2.Qe5#
    • 1...Sf5
      • 2.Qe5#
    • 1...Sb7
      • 2.Qe5#
    • 1...Sf7
      • 2.Sf6#
    • 1...Sc8
      • 2.Qe5#
    • 1...Se8
      • 2.Qe5#
  • Tries
    • 1.Sf6+?
      • 1...Ke5
        • 2.Rxd5#
      • 1...Rxf6!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxd5#
      • 1...Kf5
        • 2.Qxd5#
      • 1...Bxd2
        • 2.Sf2#
      • 1...Sb5
        • 2.Qe6#
      • 1...Rf5
        • 2.Rd4#
      • 1...Sf5
        • 2.Qe6#
      • 1...Sb7
        • 2.Qe6#
      • 1...Sf7
        • 2.Qxg6#
      • 1...Sc8
        • 2.Qe6#
      • 1...Se8
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(j);SBLOCK::R1(C)
    • B(a);N_GUARD,XR(C)::S(E)
    • B(a);N_GUARD::S(E),XB(a)
    • S(g);OGATE::QAR1(F)
    • S(g);S_CUTR(j)::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(g)::R1(C),XP(f)
      • Refutation
        • R(j);XS(E)
  • Actual
    • Q(F);P_PINP(f)
    • Threat
      • QAB1(F),XP(f)
    • Vars
      • K(d);N_SPINP(f),S_FLIGHT::QAR2(F),XP(f)
      • B(a);N_GUARD,XR(C)::S(E)
      • S(g);OGATE::QAR2(F)
      • R(j);SBLOCK::R1(C)
      • S(g);OGATE::QAB(F),XP(h)
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