MESON Chess Problem Database

Problem Display
PID: 220357 (B4b2/3NPp1Q/2N3qn/1K4B1/2P1k3/6R1/8/8 w - - 0 1)

Ellerman, Arnoldo

British Chess Magazine, 1925

B4b2/3NPp1Q/2N3qn/1K4B1/2P1k3/6R1/8/8

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Sd4#
    • 1...Qf5+
      • 2.Sc5#
    • 1...Sf5
      • 2.Sc5#
      • 2.Qh1#
    • 1...f5
      • 2.Sc5#
      • 2.Re3#
  • Tries
    • 1.Sa5+?
      • 1...Kd4
        • 2.Sb3#
      • 1...Kf5!
    • 1.Qxg6+?
      • 1...Sf5
        • 2.Sc5#
        • 2.Sf6#
        • 2.Re3#
      • 1...f5
        • 2.Sc5#
        • 2.Sf6#
        • 2.Re3#
        • 2.Qe6#
      • 1...fxg6!
    • 1.e8Q+?
      • 1...Kf5
        • 2.Sd4#
        • 2.Qe5#
      • 1...Be7!
    • 1.e8R+?
      • 1...Kf5
        • 2.Sd4#
        • 2.Re5#
      • 1...Be7!
  • Keys
    • 1.Kc5!
      • threat
        • 2.Sd4#
      • 1...Qf5+
        • 2.Sce5#
      • 1...Bxe7+
        • 2.Sxe7#
      • 1...Kf5
        • 2.Sd4#
      • 1...Sf5
        • 2.Qh1#
      • 1...f5
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(E)
    • Q(b);CHECK::S(F)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);N_SPINQ(b),P-FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);CHECK,XQ(b)
      • Refutation
        • P(d);XQ(H)
    • Try
      • P(G);CHECK
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • P(G);CHECK
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • K(C);P-FLIGHT,P_SPINP(G)
    • Threat
      • B(I)+S(E)
    • Vars
      • Q(b);CHECK::B(I)+S(E)
      • B(e);CHECK,XP(G)::B(I)+S(E),XB(e)
      • K(a);S_FLIGHT::S(E)
      • S(c);N_SPINQ(b),OGATE,SBLOCK::QAB(H)
      • P(d);N_SPINQ(b),SBLOCK::R1(A)
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Developed and maintained by Brian Stephenson.
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