MESON Chess Problem Database

Problem Display
PID: 223 (7Q/1p2n3/3b1r2/1Nn1k1N1/1BB2rP1/K1p5/3R4/8 w - - 0 1)

Nanning, Frederik Willem

2nd Prize, Revista de Sah, 1950

7Q/1p2n3/3b1r2/1Nn1k1N1/1BB2rP1/K1p5/3R4/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Bxd6#
    • 1...Sd3
      • 2.Bxd6#
    • 1...Sa4
      • 2.Bxd6#
    • 1...Se4
      • 2.Sf7#
    • 1...Sa6
      • 2.Bxd6#
    • 1...Se6
      • 2.Bxd6#
    • 1...Sd7
      • 2.Bxd6#
    • 1...Sd5
      • 2.Rxd5#
    • 1...Sf5
      • 2.Rd5#
    • 1...Sc6
      • 2.Rd5#
    • 1...Sg6
      • 2.Rd5#
    • 1...Sc8
      • 2.Rd5#
    • 1...Sg8
      • 2.Rd5#
  • Tries
    • 1.Re2+?
      • 1...Se4
        • 2.Sf7#
        • 2.Bxd6#
      • 1...Re4!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Bxc3#
      • 1...cxd2
        • 2.Bc3#
      • 1...Sb3
        • 2.Re2#
      • 1...Sd3
        • 2.Re2#
      • 1...Sa4
        • 2.Re2#
      • 1...Se4
        • 2.Sf3#
      • 1...Sa6
        • 2.Re2#
      • 1...Se6
        • 2.Bxd6#
        • 2.Re2#
      • 1...Sd7
        • 2.Re2#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Sf5
        • 2.Rd5#
      • 1...Sc6
        • 2.Rd5#
      • 1...c2
        • 2.Bc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);OGATE,P_PINB(C)::B(C),XB(e)
    • S(c);P_PINB(C),SBLOCK::S(G)
    • S(h);N_GUARD::R1(A),XS(h)
    • S(h);N_GUARD::R1(A)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • R(b);N_SPINR(f),P_SPINR(b)
  • Actual
    • Q(H);N_PINR(f),P_PINR(b)
    • Threat
      • B(C),XP(a)
    • Vars
      • P(a);XR(A)::B(C)
      • S(c);N_GUARD,P_PINB(C)::R(A)
      • S(c);P_PINB(C),SBLOCK::S(G)
      • S(h);N_GUARD::R1(A),XS(h)
      • S(h);N_GUARD::R1(A)
      • P(a);::B(C)
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