MESON Chess Problem Database

Problem Display
PID: 272681 (2K5/1Q1pR3/7B/2pr1k2/2Br2N1/3p3P/3P4/8 w - - 0 1)

Sonnenfeld, Felix Alexander

The Problemist, 1957

2K5/1Q1pR3/7B/2pr1k2/2Br2N1/3p3P/3P4/8

#2

8 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Bxd3+?
      • 1...Re4
        • 2.Bxe4#
      • 1...Rxd3!
    • 1.Rf7+?
      • 1...Ke4
        • 2.Rf4#
      • 1...Ke6
        • 2.Qxd7#
      • 1...Kg6!
    • 1.Qxd5+?
      • 1...Kg6
        • 2.Rg7#
        • 2.Qf7#
        • 2.Qg5#
      • 1...Rxd5!
  • Keys
    • 1.Re6!
      • 1...Kxe6
        • 2.Qxd7#
      • 1...Rxc4
        • 2.Qxd5#
      • 1...Rxg4
        • 2.Qxd5#
      • 1...dxe6
        • 2.Qh7#
      • 1...Re4
        • 2.Rf6#
      • 1...Rf4
        • 2.Qxd5#
      • 1...Re5
        • 2.Rf6#
      • 1...Rd6
        • 2.Se3#
      • 1...d6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK,XP(a)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::B(C),XR(b)
      • Refutation
        • R(b);XB(C)
    • Try
      • R(G);CHECK
      • Vars
        • K(e);OGATE,P_SPINR(d),S_FLIGHT::R1(G)
        • K(e);N_GUARD,P_SPINR(d),S_FLIGHT::QAB1(F),XP(f)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(F);CHECK,XR(d)
      • Refutation
        • R(b);XQ(F)
  • Actual
    • R(G);
    • Vars
      • K(e);OGATEB,P_SPINR(d),S_FLIGHT,XR(G)::QAB1(F),XP(f)
      • R(b);N_GUARD,XB(C)::QAR2(F),XR(d)
      • R(b);N_GUARD,XS(D)::QAR2(F),XR(d)
      • P(f);OGATE,SBLOCK,XR(G)::QAB(F)
      • R(b);SBLOCK::R1(G)
      • R(b);N_GUARD::QAR2(F),XR(d)
      • R(d);::R1(G)
      • R(d);::S(D)
      • P(f);OGATE::QAR2(F)
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