MESON Chess Problem Database

Problem Display
PID: 18359 (3R1R2/8/4N3/1b2B3/4p3/1p1PkPr1/1K2n3/4Q3 w - - 0 1)

Nanning, Frederik Willem

1st Prize, Il Due Mosse, 1955

3R1R2/8/4N3/1b2B3/4p3/1p1PkPr1/1K2n3/4Q3

#2

8 + 6

3105 FIDE Album (1945-1955) 1964
3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd3
      • 2.Bd4#
    • 1...exd3
      • 2.Bd4#
    • 1...exf3
      • 2.Bf4#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Qxe2#
      • 1...Kxd3
        • 2.Qxe2#
      • 1...Bxd3
        • 2.Bf4#
      • 1...exd3
        • 2.Bf4#
      • 1...exf3
        • 2.Sf5#
      • 1...Rg2!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qxe2#
      • 1...Kxf3
        • 2.Qxe2#
      • 1...Bxd3
        • 2.Sd5#
      • 1...exd3
        • 2.Sd5#
      • 1...exf3
        • 2.Bd4#
      • 1...Rg2
        • 2.Sxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(f);SBLOCK,XP(C)::B(E)
    • P(e);SBLOCK,XP(C)::B(E)
    • P(e);SBLOCK,XP(D)::B(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(A),XS(a)
      • Vars
        • K(c);N_SPINS(a),P-FLIGHT,XP(C)::QAB1(A),XS(a)
        • B(f);SBLOCK,XP(C)::B(E)
        • P(e);SBLOCK,XP(C)::B(E)
        • P(e);SBLOCK,XP(D)::S(F)
      • Refutation
        • R(d);
  • Actual
    • S(F);
    • Threat
      • QAR1(A),XS(a)
    • Vars
      • K(c);N_SPINS(a),P-FLIGHT,XP(D)::QAB1(A),XS(a)
      • B(f);SBLOCK,XP(C)::S(F)
      • P(e);SBLOCK,XP(C)::S(F)
      • P(e);SBLOCK,XP(D)::B(E)
      • R(d);N_GUARD::S(F),XR(d)
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