MESON Chess Problem Database

Problem Display
PID: 237755 (1N1r4/7q/1p6/p2R4/N1k1B2R/1nPp1p2/2n4p/BQ1b2bK w - - 0 1)

Ellerman, Arnoldo

Arbejder-Skak, 1955

1N1r4/7q/1p6/p2R4/N1k1B2R/1nPp1p2/2n4p/BQ1b2bK

#2

9 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Scxa1
      • 2.Qxd3#
    • 1...Sa3
      • 2.Qxd3#
    • 1...Se3
      • 2.Sxb6#
      • 2.Qxd3#
    • 1...Scd4
      • 2.Sxb6#
      • 2.Qxd3#
    • 1...Sbxa1
      • 2.Qb5#
    • 1...Sc1
      • 2.Qb5#
    • 1...Sd2
      • 2.Qb5#
    • 1...Sbd4
      • 2.Sxb6#
    • 1...Sc5
      • 2.Sxb6#
    • 1...f2
      • 2.Sxb6#
  • Tries
    • 1.Bxh7+?
      • 1...Bd4
        • 2.Sxb6#
      • 1...Scd4
        • 2.Sxb6#
      • 1...Sbd4
        • 2.Sxb6#
        • 2.Qa2#
        • 2.Qb5#
      • 1...Kxd5!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Qxb3#
      • 1...Kxb5
        • 2.Bc6#
      • 1...Scxa1
        • 2.Bxd3#
      • 1...Sbxa1
        • 2.Bd5#
      • 1...Se1
        • 2.Bxd3#
      • 1...Sa3
        • 2.Bxd3#
      • 1...Se3
        • 2.Bxd3#
      • 1...Sb4
        • 2.Bxd3#
      • 1...Scd4
        • 2.Qxd3#
      • 1...Sc1
        • 2.Bd5#
      • 1...Sd2
        • 2.Bd5#
      • 1...Sbd4
        • 2.Sxb6#
      • 1...Sc5
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(c);OGATE,XB(A)::QAB1(B),XP(f)
    • S(c);OGATE::QAB1(B),XP(f)
    • S(e);OGATE,XB(A)::QAB1(B)
    • S(e);OGATE::QAB1(B)
    • S(e);S_CUTB(b)::S(E),XP(j)
    • P(g);S_CUTB(b)::S(E),XP(j)
  • Tries
    • Try
      • B(F);CHECK,XQ(k)
      • Vars
        • B(b);P_SPINB(b)::S(E),XP(j)
        • S(c);P_SPINS(c)::S(E),XP(j)
      • Refutation
        • K(h);S_FLIGHT,XR(H)
  • Actual
    • R(H);
    • Threat
      • QAB1(B),XS(e)
    • Vars
      • K(h);P_SPINS(e),S_FLIGHT,XR(H)::B(F)
      • S(c);XB(A)::R(G)+B(F),DCHECK,XP(f)
      • S(e);XB(A)::R(G)+B(F),DCHECK
      • S(c);::R(G)+B(F),DCHECK,XP(f)
      • S(c);OGATE::QAB1(B),XP(f)
      • S(e);::R(G)+B(F),DCHECK
      • S(e);S_CUTB(b)::S(E),XP(j)
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