MESON Chess Problem Database

Problem Display
PID: 232833 (3Qn1bb/K1p5/n1B5/1Pk1Br2/p1P3r1/1PR5/2N5/8 w - - 0 1)

Ellerman, Arnoldo

Il Due Mosse, 1952

3Qn1bb/K1p5/n1B5/1Pk1Br2/p1P3r1/1PR5/2N5/8

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qd4#
    • 1...Rg2
      • 2.Qd4#
    • 1...Rg3
      • 2.Qd4#
    • 1...Rxc4
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Rgg5
      • 2.Qd4#
    • 1...Rg6
      • 2.Qd4#
    • 1...Rg7
      • 2.Bd4#
      • 2.Qd4#
    • 1...Rf7
      • 2.Qd5#
    • 1...Bxc4
      • 2.Qd5#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bh7
      • 2.Qd5#
    • 1...Sb8
      • 2.b4#
    • 1...Sf6
      • 2.Qe7#
      • 2.Qf8#
    • 1...Sg7
      • 2.Qe7#
  • Tries
    • 1.Bd6+?
      • 1...cxd6
        • 2.Qb6#
      • 1...Sxd6!
  • Keys
    • 1.Bxc7!
      • threat
        • 2.Bb6#
      • 1...Saxc7
        • 2.b4#
      • 1...Sexc7
        • 2.Qe7#
      • 1...Rg7
        • 2.Qd4#
      • 1...Rf7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • R(b);N_GUARD::QAB1(I)
    • R(b);N_GUARD,P_SPINR(b),XP(D)::QAB1(I)
    • R(b);N_GUARD::QAB1(I),XR(b)
    • R(d);S_CUTB(h)::QAR1(I)
    • B(h);N_GUARD,P_SPINB(h),XP(D)::QAR1(I)
    • B(h);N_GUARD::QAR1(I),XB(h)
    • B(h);N_GUARD::QAR1(I)
    • S(e);N_GUARD::P(B)
    • S(g);N_GUARD::QAB(I)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • P(f);OGATE,SBLOCK,XB(F)::QAB1(I)
      • Refutation
        • S(g);XB(F)
  • Actual
    • B(F);XP(f)
    • Threat
      • B(F)
    • Vars
      • S(e);N_GUARD,XB(F)::P(B)
      • S(g);N_GUARD,XB(F)::QAB(I)
      • R(b);N_GUARD,P_PINB(F),S_CUTB(i)::QAB1(I)
      • R(d);N_GUARD,P_PINB(F),S_CUTB(h)::QAR1(I)
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