MESON Chess Problem Database

Problem Display
PID: 237762 (7b/8/2K5/3pkP2/4P2Q/7B/b3R3/2n3B1 w - - 0 1)

Ellerman, Arnoldo

Arbejder-Skak, 1959

7b/8/2K5/3pkP2/4P2Q/7B/b3R3/2n3B1

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Qg3#
    • 1...Sb3
      • 2.exd5#
    • 1...Sd3
      • 2.exd5#
    • 1...dxe4
      • 2.Rxe4#
    • 1...d4
      • 2.Bh2#
  • Tries
    • 1.Re3?
      • threat
        • 2.exd5#
      • 1...Kd4
        • 2.exd5#
        • 2.e5#
      • 1...dxe4
        • 2.Rxe4#
      • 1...d4
        • 2.Bh2#
      • 1...Bb1!
    • 1.Qg5?
      • threat
        • 2.f6#
      • 1...Bf6
        • 2.Qg3#
      • 1...Sxe2!
    • 1.f6?
      • threat
        • 2.Qg5#
      • 1...Bxf6
        • 2.Qg3#
      • 1...Sxe2!
  • Keys
    • 1.Be3!
      • threat
        • 2.Qe7#
      • 1...dxe4
        • 2.Qxh8#
      • 1...Bf6
        • 2.Qf4#
      • 1...d4
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(e);SBLOCK::QAB(E)
    • S(a);N_GUARD::R(B)+P(D),XP(c)
    • P(c);OGATE,P_SPINP(c),XP(D)::R1(B),XP(c)
    • P(c);SBLOCK::B(A)
  • Tries
    • Try
      • R(B);
      • Threat
        • R(B)+P(D),XP(c)
      • Vars
        • P(c);OGATE,P_SPINP(c),XP(D)::R1(B),XP(c)
        • P(c);SBLOCK::B(A)
      • Refutation
        • B(b);
    • Try
      • Q(E);
      • Threat
        • QAR(E)+P(F)
      • Vars
        • B(e);SBLOCK::QAB(E)
      • Refutation
        • S(a);XR(B)
    • Try
      • P(F);
      • Threat
        • QAR2(E)
      • Vars
        • B(e);SBLOCK,XP(F)::QAB(E)
      • Refutation
        • S(a);XR(B)
  • Actual
    • B(A);
    • Threat
      • QAR2(E)
    • Vars
      • P(c);SBLOCK,XP(D)::QAB(E),XB(e)
      • B(e);SBLOCK::QAB1(E)
      • P(c);SBLOCK::B(A)
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