MESON Chess Problem Database

Problem Display
PID: 139798 (1b1N3n/n3N1Q1/r1p2p2/2RPk3/8/3b2K1/5P2/6BB w - - 0 1)

Ellerman, Arnoldo

Club Argentino de Ajedrez, 1914

1b1N3n/n3N1Q1/r1p2p2/2RPk3/8/3b2K1/5P2/6BB

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4+
      • 2.f4#
    • 1...Bd6
      • 2.f4#
    • 1...cxd5
      • 2.Rxd5#
  • Tries
    • 1.Sf7+?
      • 1...Kd4+
        • 2.f4#
      • 1...Sxf7!
    • 1.dxc6+?
      • 1...Kd4+
        • 2.f4#
      • 1...Kd6!
    • 1.d6+?
      • 1...Kd4
        • 2.Se6#
        • 2.f3#
        • 2.f4#
      • 1...Kxd6!
  • Keys
    • 1.Sg8!
      • threat
        • 2.Qxf6#
      • 1...Kd4+
        • 2.f4#
      • 1...Kf5+
        • 2.d6#
      • 1...Kd6
        • 2.Qe7#
      • 1...cxd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);CHECK,S_FLIGHT::B(A)+P(C)
    • B(g);SBLOCK::P(C)
    • P(d);N_SPINP(e),OGATE,P_SPINP(d),XP(F)::R1(E),XP(d)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(b);CHECK,S_FLIGHT::B(A)+P(C)
      • Refutation
        • S(h);XS(I)
    • Try
      • P(F);CHECK,XP(d)
      • Vars
        • K(b);CHECK,S_FLIGHT::B(A)+P(C)
      • Refutation
        • K(b);N_SPINP(e),S_FLIGHT
    • Try
      • P(F);CHECK
      • Refutation
        • K(b);N_SPINP(e),S_FLIGHT,XP(F)
  • Actual
    • S(G);
    • Threat
      • QAB1(H),XP(e)
    • Vars
      • K(b);CHECK,S_FLIGHT::B(A)+P(C)
      • K(b);CHECK,N_SPINP(e),P-FLIGHT::R(E)+P(F)
      • K(b);N_SPINP(e),S_FLIGHT::QAB1(H)
      • P(d);N_SPINP(e),OGATE,P_SPINP(d),XP(F)::R1(E),XP(d)
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