MESON Chess Problem Database

Problem Display
PID: 71124 (1n6/B7/rp3QP1/4NK2/1n6/Rp2PB2/b1Pprk1P/7R w - - 0 1)

Ellerman, Arnoldo

Guidelli, Giorgio

L'Italia Scacchistica, 1919

1n6/B7/rp3QP1/4NK2/1n6/Rp2PB2/b1Pprk1P/7R

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Qh4#
    • 1...bxc2
      • 2.Qh4#
    • 1...b2
      • 2.Qh4#
    • 1...b5
      • 2.Qh4#
  • Tries
    • 1.Kf4?
      • threat
        • 2.Sg4#
        • 2.Qh4#
      • 1...Sd3+
        • 2.Sxd3#
      • 1...Sd5+!
    • 1.Kg5?
      • threat
        • 2.Sg4#
      • 1...Kxe3
        • 2.Sg4#
      • 1...Ra5!
    • 1.Rf1+?
      • 1...Kxe3
        • 2.Sc4#
        • 2.Sg4#
      • 1...Kxf1!
  • Keys
    • 1.Ke6!
      • threat
        • 2.Sg4#
      • 1...bxc2+
        • 2.Bd5#
      • 1...b2+
        • 2.Bd5#
      • 1...b5+
        • 2.Bc6#
      • 1...Kxe3
        • 2.Sg4#
      • 1...Rxe3
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XP(E)::QAB(I)
    • P(e);XP(B)::QAB(I)
    • P(e);::QAB(I)
    • P(h);::QAB(I)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(f);CHECK,N_GUARD::S(G),XS(f)
      • Refutation
        • S(f);CHECK
    • Try
      • K(H);P-FLIGHT
      • Threat
        • S(G)
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT,XP(E)::S(G)
      • Refutation
        • R(g);P_PINS(G)
    • Try
      • R(A);CHECK
      • Refutation
        • K(d);P-FLIGHT,XR(A)
  • Actual
    • K(H);S_FLIGHT
    • Threat
      • S(G)
    • Vars
      • P(e);CHECK,XP(B)::QAR(I)+B(F)
      • P(e);CHECK::QAR(I)+B(F)
      • P(h);CHECK::QAR(I)+B(F)
      • K(d);P_SPINP(e),S_FLIGHT,XP(E)::S(G)
      • R(c);P_PINS(G),SBLOCK,XP(E)::QAB(I)
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