MESON Chess Problem Database

Problem Display
PID: 157383 (2nbn1R1/Pr1P3K/1pPk1p2/2p1NQ2/1P6/1P6/7B/8 w - - 0 1)

Ellerman, Arnoldo

Vita Ligure, 1918

2nbn1R1/Pr1P3K/1pPk1p2/2p1NQ2/1P6/1P6/7B/8

#2

10 + 8

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kc7
      • 2.dxe8S#
    • 1...Ke7
      • 2.dxc8S#
    • 1...Rxd7+
      • 2.Qxd7#
  • Tries
    • 1.Sd3+?
      • 1...Ke7
        • 2.dxe8Q#
      • 1...Kxc6!
    • 1.Sf3+?
      • 1...Ke7
        • 2.dxe8Q#
      • 1...Kxc6!
    • 1.Sc4+?
      • 1...Ke7
        • 2.dxe8Q#
      • 1...Kxc6!
    • 1.Sg4+?
      • 1...Ke7
        • 2.dxe8Q#
      • 1...Kxc6!
    • 1.Sf7+?
      • 1...Ke7
        • 2.dxe8Q#
      • 1...Kxc6!
    • 1.Qd3+?
      • 1...Kc7
        • 2.dxe8S#
      • 1...Ke7
        • 2.Rxe8#
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Ke6!
    • 1.Qe6+?
      • 1...Kc7
        • 2.dxc8Q#
        • 2.dxc8R#
        • 2.dxe8S#
      • 1...Kxe6!
  • Keys
    • 1.b5!
      • threat
        • 2.Sg6#
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Kd5
        • 2.Sf3#
      • 1...Kc7
        • 2.dxe8S#
      • 1...Ke7
        • 2.dxc8S#
      • 1...fxe5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_PINP(H),S_FLIGHT::PXS(h)=S
    • K(c);N_PINP(H),S_FLIGHT::PXS(f)=S
    • R(e);CHECK,OGATE,XP(H)::QAR1(E),XR(e)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_PINP(H),S_FLIGHT::PXS(h)=Q
      • Refutation
        • K(c);P-FLIGHT,XP(F)
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_PINP(H),S_FLIGHT::PXS(h)=Q
      • Refutation
        • K(c);P-FLIGHT,XP(F)
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_PINP(H),S_FLIGHT::PXS(h)=Q
      • Refutation
        • K(c);P-FLIGHT,XP(F)
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_PINP(H),S_FLIGHT::PXS(h)=Q
      • Refutation
        • K(c);P-FLIGHT,XP(F)
    • Try
      • S(D);CHECK,N_SPINP(H)
      • Vars
        • K(c);S_FLIGHT::PXS(h)=Q
      • Refutation
        • K(c);P-FLIGHT,XP(F)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);N_PINP(H),S_FLIGHT::PXS(h)=S
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);P-FLIGHT,XQ(E)
  • Actual
    • P(C);
    • Threat
      • B(A)+S(D)
    • Vars
      • R(e);CHECK,OGATE,XP(H)::QAR1(E),XR(e)
      • K(c);P-FLIGHT::QAR(E)+S(D)
      • K(c);N_PINP(H),S_FLIGHT::PXS(h)=S
      • K(c);N_PINP(H),S_FLIGHT::PXS(f)=S
      • P(d);OGATE,P_SPINP(d),XS(D)::QAB1(E),XP(d)
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