MESON Chess Problem Database

Problem Display
PID: 234375 (2Q5/q1N1Bp2/1pk1PRn1/p1n2N2/P1R1p3/8/8/b4K2 w - - 0 1)

Ellerman, Arnoldo

Problemas, 1951

2Q5/q1N1Bp2/1pk1PRn1/p1n2N2/P1R1p3/8/8/b4K2

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Qd7#
    • 1...Bd4
      • 2.Sxd4#
    • 1...Se5
      • 2.exf7#
    • 1...fxe6
      • 2.Rxe6#
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rd6#
      • 1...Qa6+
        • 2.Sxa6#
      • 1...Bxd4
        • 2.Sxd4#
      • 1...Sxa4
        • 2.exf7#
      • 1...Sxe6
        • 2.Rc4#
      • 1...Sb3
        • 2.exf7#
      • 1...Sd3
        • 2.exf7#
      • 1...Sa6
        • 2.exf7#
      • 1...Sb7
        • 2.Sb5#
        • 2.Sd5#
        • 2.Sa6#
        • 2.Sa8#
        • 2.Se8#
        • 2.Qd7#
      • 1...Sd7
        • 2.exd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(h);SBLOCK::QAB1(I)
    • B(a);N_GUARD::S(D),XB(a)
    • S(g);S_CUTB(a)::R(F)+P(E),XP(i)
    • P(i);OGATE,P_SPINP(i),XP(E)::R(F),XP(i)
  • Actual
    • R(C);N_PINS(d)
    • Threat
      • R1(C)
    • Vars
      • Q(h);CHECK,N_GUARD::QAR(I)+S(G),XQ(h)
      • B(a);XR(C)::S(D),XB(a)
      • S(d);N_GUARD,XP(B)::R(F)+P(E),XP(i)
      • S(d);OGATEB,P_SPINS(d),XP(E)::R(C)
      • S(d);N_GUARD::R(F)+P(E),XP(i)
      • S(d);OGATE::R(F)+P(E),XS(d)
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