MESON Chess Problem Database

Problem Display
PID: 83596 (N1b5/1pR5/2Pkp1N1/1R1pp3/1r3QK1/B1b3p1/1r6/8 w - - 0 1)

Ellerman, Arnoldo

Streatham News, 1925

N1b5/1pR5/2Pkp1N1/1R1pp3/1r3QK1/B1b3p1/1r6/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qf8#
    • 1...d4
      • 2.Qxe5#
      • 2.Qf8#
  • Tries
    • 1.Sxe5?
      • threat
        • 2.Sc4#
        • 2.Sf7#
      • 1...Bd7
        • 2.Rxd7#
      • 1...Bxe5!
    • 1.Se7?
      • threat
        • 2.Sxc8#
      • 1...Bd7
        • 2.Rxd7#
      • 1...exf4!
    • 1.Bxb4+?
      • 1...Bxb4
        • 2.Qxe5#
        • 2.Qf8#
      • 1...Rxb4!
  • Keys
    • 1.Rb6!
      • threat
        • 2.cxb7#
      • 1...Kc5
        • 2.cxb7#
      • 1...bxc6
        • 2.Rbxc6#
      • 1...d4
        • 2.Qxe5#
      • 1...Bd4
        • 2.Qf8#
      • 1...Bd7
        • 2.cxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(b);N_PINQ(B)::QAB(B)
  • Tries
    • Try
      • S(F);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • B(j);N_GUARD::R1(G),XB(j)
      • Refutation
        • B(b);P_SPINB(b),XS(F)
    • Try
      • S(F);
      • Threat
        • S(F),XB(j)
      • Vars
        • B(j);N_GUARD::R1(G),XB(j)
      • Refutation
        • P(f);N_SPINP(f),XQ(B)
    • Try
      • B(A);CHECK,N_SPINQ(B),XR(d)
      • Refutation
        • R(a);P_PINQ(B),XB(A)
  • Actual
    • R(D);
    • Threat
      • R(D)+P(E),XP(i)
    • Vars
      • K(g);N_SPINP(f),S_FLIGHT::R(G)+P(E),XP(i)
      • P(i);OGATE,XP(E)::R1(D),XP(i)
      • P(e);N_PINQ(B)::QAB1(B),XP(f)
      • B(b);N_PINQ(B)::QAB(B)
      • B(j);OGATE::R(D)+P(E),XB(j)
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