MESON Chess Problem Database

Problem Display
PID: 239906 (2rb2B1/4p1K1/8/1N1n4/4kPP1/1p2B2r/3nP1N1/6Q1 w - - 0 1)

Ellerman, Arnoldo

Parallele 50, 1951

2rb2B1/4p1K1/8/1N1n4/4kPP1/1p2B2r/3nP1N1/6Q1

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Bh7#
    • 1...Rf3
      • 2.Bh7#
    • 1...Rg3
      • 2.Bh7#
    • 1...Rh7+
      • 2.Bxh7#
    • 1...Sc4
      • 2.Qb1#
    • 1...Sc7
      • 2.Sc3#
    • 1...e5
      • 2.Sd6#
    • 1...e6
      • 2.Sd6#
  • Keys
    • 1.Bc5!
      • threat
        • 2.Qd4#
      • 1...Rh7+
        • 2.Bxh7#
      • 1...Rd3
        • 2.Bh7#
      • 1...Re3
        • 2.Bh7#
      • 1...Sf3
        • 2.Qb1#
      • 1...Se3
        • 2.Sc3#
      • 1...e5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD,XB(D)::B(I)
    • R(c);N_GUARD::B(I)
    • R(c);N_GUARD,P_PINP(F)::B(I)
    • R(c);CHECK,N_GUARD::B(I),XR(c)
    • S(a);N_GUARD,S_CUTR(g)::QAB(A)
    • S(e);N_GUARD,S_CUTR(g)::S(G)
    • P(f);N_GUARD::S(G)
  • Actual
    • B(D);
    • Threat
      • QAR1(A)
    • Vars
      • R(c);CHECK,N_GUARD::B(I),XR(c)
      • R(c);N_GUARD::B(I)
      • S(a);N_GUARD,S_CUTR(c)::QAB(A)
      • S(e);N_GUARD,S_CUTR(c)::S(G)
      • P(f);N_GUARD::S(G)
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