MESON Chess Problem Database

Problem Display
PID: 251617 (5R1K/8/2p4N/2p1kP1R/5r1p/b3P1nr/B2N2nB/3Q4 w - - 0 1)

Nanning, Frederik Willem

Jerusalem Post, 1950

(First published on Fri Nov 24 1950)

5R1K/8/2p4N/2p1kP1R/5r1p/b3P1nr/B2N2nB/3Q4

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Sf3#
    • 1...Se4
      • 2.Sc4#
  • Tries
    • 1.Sf3+?
      • 1...Ke4
        • 2.Re8#
      • 1...Rxf3!
    • 1.Sc4+?
      • 1...Ke4
        • 2.Bb1#
        • 2.Re8#
      • 1...Rxc4!
    • 1.Re8+?
      • 1...Kf6
        • 2.Sg8#
        • 2.Re6#
      • 1...Kd6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Re8#
      • 1...Kxe4
        • 2.Re8#
      • 1...Rxe4
        • 2.f6#
      • 1...Sxe4
        • 2.Sg4#
      • 1...c4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD,P_SPINS(c),SBLOCK::S(C)
    • S(c);P_SPINR(e),SBLOCK::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(h);N_GUARD,P-FLIGHT::R(I)
      • Refutation
        • R(e);P_SPINS(c),XS(C)
    • Try
      • S(C);CHECK
      • Refutation
        • R(e);P_SPINS(c),XS(C)
    • Try
      • R(I);CHECK
      • Refutation
        • K(h);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • R(I)
    • Vars
      • K(h);P-FLIGHT,XS(C)::R(I)
      • R(e);N_GUARD,P_SPINS(c),SBLOCK,XS(C)::R(G)+P(F)
      • S(c);P_SPINR(e),SBLOCK,XS(C)::S(H)
      • P(g);N_GUARD::QAB1(A)
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