MESON Chess Problem Database

Problem Display
PID: 138617 (3R4/1p5Q/6r1/3NP3/P1kPN3/1p2Pr2/1pn3Bp/3R3K w - - 0 1)

Ellerman, Arnoldo

Wiadomoscy Szachowy, 1936

3R4/1p5Q/6r1/3NP3/P1kPN3/1p2Pr2/1pn3Bp/3R3K

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1+
      • 2.Bxf1#
    • 1...Rfg3
      • 2.Bf1#
    • 1...Rh3
      • 2.Bf1#
    • 1...Rxg2
      • 2.Qc7#
    • 1...Rgg3
      • 2.Sd2#
      • 2.Qc7#
    • 1...Rg4
      • 2.Sd2#
      • 2.Qc7#
    • 1...Rg5
      • 2.Sd2#
      • 2.Qc7#
    • 1...Ra6
      • 2.Sd2#
    • 1...Rb6
      • 2.Sd2#
    • 1...Rc6
      • 2.Sd2#
    • 1...Re6
      • 2.Sd2#
    • 1...Rf6
      • 2.Sd2#
    • 1...Rh6
      • 2.Sd2#
    • 1...Rg7
      • 2.Sd2#
    • 1...Rg8
      • 2.Sd2#
      • 2.Qc7#
    • 1...Sxd4
      • 2.Rxd4#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.Qb5#
      • 1...Rf1+
        • 2.Bxf1#
      • 1...Sxd4
        • 2.Rxd4#
        • 2.Qb4#
      • 1...Sa3
        • 2.Qb4#
      • 1...Rb6!
  • Keys
    • 1.e6!
      • threat
        • 2.Qc7#
      • 1...Rf1+
        • 2.Bxf1#
      • 1...Rxe6
        • 2.Sd2#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Rf7
        • 2.Sd6#
      • 1...Rg7
        • 2.Sd2#
      • 1...Sb4
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(e);CHECK,N_GUARD::B(C),XR(e)
    • R(e);N_GUARD::B(C)
    • R(g);N_GUARD,XB(C)::QAR(J)
    • R(g);::S(G)
    • S(b);OGATE,XP(F)::R1(A),XS(b)
  • Tries
    • Try
      • Q(J);XP(h)
      • Threat
        • QAB1(J)
      • Vars
        • R(e);CHECK,N_GUARD::B(C),XR(e)
        • S(b);N_GUARD::QAR1(J)
      • Refutation
        • R(g);
  • Actual
    • P(I);
    • Threat
      • QAR(J)
    • Vars
      • R(e);CHECK,N_GUARD::B(C),XR(e)
      • R(g);XP(I)::S(G)
      • S(b);OGATE,XP(F)::R1(A),XS(b)
      • R(e);::S(G)
      • R(g);::S(G)
      • S(b);SBLOCK::S(H)
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