MESON Chess Problem Database

Problem Display
PID: 138501 (nN6/ppP5/1B3Q2/1k1N3K/8/PP6/1R2R3/r2qbB2 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1926

nN6/ppP5/1B3Q2/1k1N3K/8/PP6/1R2R3/r2qbB2

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Rexc2#
    • 1...Qxe2+
      • 2.Bxe2#
    • 1...Qxb3
      • 2.Re4#
    • 1...Qb1
      • 2.Rec2#
    • 1...Qc1
      • 2.Rec2#
    • 1...Qd2
      • 2.Rexd2#
    • 1...Qxd5+
      • 2.Re5#
    • 1...Rb1
      • 2.a4#
    • 1...Rc1
      • 2.a4#
    • 1...Bf2
      • 2.Sc3#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bg3
      • 2.Sc3#
    • 1...Bh4
      • 2.Sc3#
    • 1...Sxc7
      • 2.Sxc7#
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qd7#
      • 1...Qxe2+
        • 2.Bxe2#
      • 1...Qxb3
        • 2.Re4#
      • 1...Qxd5
        • 2.Re6#
      • 1...Sxb6
        • 2.Sc3#
      • 1...axb6
        • 2.Sc3#
      • 1...Qc2
        • 2.Rexc2#
      • 1...Qc1
        • 2.Rec2#
      • 1...Rc1
        • 2.a4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_PINR(C)::B(A)+R(C),XQ(b)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XR(C)::B(A),XQ(b)
    • Q(b);N_PINR(C),P_SPINQ(b),XP(E)::B(A)+R(C)
    • Q(b);N_PINR(C)::B(A)+R(C)
    • Q(b);CHECK,N_PINR(C),XS(F)::B(A)+R(C)
    • R(a);N_GUARD::P(D)
    • B(c);N_GUARD::S(F)
    • B(c);N_GUARD::S(F),XB(c)
    • S(g);XP(J)::S(F),XS(g)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XR(C)::B(A),XQ(b)
      • Q(b);N_PINR(C),P_SPINQ(b),XP(E)::B(A)+R(C)
      • Q(b);N_PINR(C),P_PINQ(I),P_SPINQ(b),XS(F)::B(A)+R(C)
      • S(g);SBLOCK,XB(H)::QAR(I)+S(F),DCHECK
      • P(e);SBLOCK,XB(H)::QAR(I)+S(F),DCHECK
      • Q(b);N_PINR(C)::B(A)+R(C),XQ(b)
      • Q(b);N_PINR(C)::B(A)+R(C)
      • R(a);N_GUARD::P(D)
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Developed and maintained by Brian Stephenson.
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