MESON Chess Problem Database

Problem Display
PID: 44057 (5K1B/2pQp3/ppp4N/3nrp2/1PPk2nR/1PN5/3P1rp1/5B2 w - - 0 1)

Nietvelt, Gustaaf Josephus

3rd HM., L'Italia Scacchistica, 1930/I

5K1B/2pQp3/ppp4N/3nrp2/1PPk2nR/1PN5/3P1rp1/5B2

#2

11 + 12

20 De Problemist 1931

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Sf5#
    • 1...c5
      • 2.Qxd5#
  • Tries
    • 1.Rxg4+?
      • 1...Rf4
        • 2.Sxf5#
        • 2.Rxf4#
      • 1...f4
        • 2.Sf5#
      • 1...fxg4+!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Bxe5#
      • 1...Rxf5+
        • 2.Sxf5#
      • 1...Rxd2
        • 2.Qxe5#
      • 1...Sxb4
        • 2.Qxf2#
      • 1...Re2
        • 2.Sxe2#
      • 1...Rf4
        • 2.Se2#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sf6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • P(g);N_SPINS(d),P_SPINS(e),S_CUTR(a)::S(H)
    • P(j);N_GUARD::QAR1(I),XS(e)
  • Tries
    • Try
      • R(G);CHECK,P_PINS(e),XS(d)
      • Vars
        • P(g);P_SPINP(g)::S(H)
      • Refutation
        • P(g);CHECK,XR(G)
  • Actual
    • Q(I);P_SPINQ(I),XP(g)
    • Threat
      • B(K),XR(f)
    • Vars
      • R(a);CHECK,XQ(I)::S(H),XR(a)
      • R(a);N_PINQ(I),XP(B)::QAB1(I),XR(f)
      • S(e);N_GUARD,XP(E)::QAB(I),XR(a)
      • R(a);N_GUARD,N_PINQ(I)::S(D),XR(a)
      • R(a);N_GUARD,N_SPINS(d)::S(D)
      • S(e);N_PINQ(I),N_SPINS(d)::QAR1(I)
      • S(e);N_PINQ(I),N_SPINR(f)::QAR1(I)
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Developed and maintained by Brian Stephenson.
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