MESON Chess Problem Database

Problem Display
PID: 198793 (b2n1r2/2B5/3R2P1/1rnNk1Pp/3p1p1K/8/2Qp1N2/8 w - - 0 1)

Ellerman, Arnoldo

2nd HM., L'Italia Scacchistica, 1921

b2n1r2/2B5/3R2P1/1rnNk1Pp/3p1p1K/8/2Qp1N2/8

#2

8 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Ra6#
      • 2.Rb6#
      • 2.Rc6#
      • 2.Rf6#
    • 1...Sb3
      • 2.Qe4#
    • 1...Sa4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sa6
      • 2.Qe4#
    • 1...Sce6
      • 2.Qe4#
    • 1...Scb7
      • 2.Qe4#
    • 1...Sd7
      • 2.Qe4#
  • Keys
    • 1.Se7!
      • threat
        • 2.Ra6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rf6#
      • 1...Rb6
        • 2.Rxb6#
        • 2.Rc6#
      • 1...Rb7
        • 2.Qxc5#
      • 1...Rf6
        • 2.Rxf6#
      • 1...Bc6
        • 2.Rxc6#
        • 2.Rf6#
      • 1...Se4
        • 2.Sd3#
      • 1...Sa6
        • 2.Rxa6#
      • 1...Sce6
        • 2.Rd5#
      • 1...Scb7
        • 2.Qe4#
      • 1...Sc6
        • 2.Rxc6#
        • 2.Rf6#
      • 1...Sde6
        • 2.Rd5#
      • 1...Sdb7
        • 2.Sc6#
      • 1...Sf7
        • 2.Qf5#
      • 1...d3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • S(e);N_GUARD::QAR1(A)
    • S(e);N_GUARD::QAR1(A),XS(e)
  • Actual
    • S(D);
    • Threat
      • DUALS(4)
    • Vars
      • R(d);N_GUARD,S_CUTB(h)::QAR2(A),XS(e)
      • R(j);::B(H)+R(F),XR(j)
      • S(e);N_GUARD,SBLOCK::S(B)
      • S(e);::B(H)+R(F),XS(e)
      • S(e);SBLOCK::B(H)+R(F),DCHECK
      • S(e);N_GUARD,S_CUTB(h)::QAR1(A)
      • S(i);SBLOCK::B(H)+R(F),DCHECK
      • S(i);N_GUARD,S_CUTB(h)::S(D)
      • S(i);S_CUTR(j)::QAR1(A)
      • P(b);OGATEB::QAB(A)
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