MESON Chess Problem Database

Problem Display
PID: 83539 (8/2nQ4/4bp2/4p3/1RN1k1B1/8/K7/2B5 w - - 0 1)

Ellerman, Arnoldo

Good Companions, 1920

8/2nQ4/4bp2/4p3/1RN1k1B1/8/K7/2B5

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc4+
      • 2.Rxc4#
    • 1...Bf5
      • 2.Sb2#
      • 2.Sa3#
      • 2.Se3#
      • 2.Sa5#
      • 2.Sb6#
  • Tries
    • 1.Bf3+?
      • 1...Kf5
        • 2.Qh7#
      • 1...Kxf3!
  • Keys
    • 1.Be2!
      • threat
        • 2.Qd3#
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...Kf5
        • 2.Qh7#
      • 1...Bxd7
        • 2.Se3#
      • 1...Sd5
        • 2.Sd6#
      • 1...Bd5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(c);CHECK,OGATE,P_SPINB(c),XS(D)::R(C),XB(c)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(a);P_SPINB(c),S_FLIGHT::QAB(F)
      • Refutation
        • K(a);S_FLIGHT,XB(E)
  • Actual
    • B(E);
    • Threat
      • QAB1(F)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(D)::R(C),XB(c)
      • K(a);P_SPINB(c),S_FLIGHT::QAB(F)
      • B(c);N_PINS(D),XQ(F)::R(C)+S(D)
      • S(e);N_PINS(D),SBLOCK::R(C)+S(D),DCHECK
      • B(c);OGATE,SBLOCK::QAR2(F)
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