MESON Chess Problem Database

Problem Display
PID: 144583 (8/2qn4/1n2Q2K/6P1/3kNR2/RP6/1NpP3b/B5r1 w - - 0 1)

Nietvelt, Gustaaf Josephus

3rd HM., Budafoki MTE, 1931

8/2qn4/1n2Q2K/6P1/3kNR2/RP6/1NpP3b/B5r1

#2

10 + 7

38 Magyar Sakkvilag 1931

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sg3#
  • Tries
    • 1.Sc4+?
      • 1...Kd3
        • 2.Sf2#
      • 1...Rxa1!
    • 1.Sg3+?
      • 1...Kc5
        • 2.Ra5#
      • 1...Qxf4!
    • 1.Qd6+?
      • 1...Sd5
        • 2.Sg3#
      • 1...Qxd6+!
  • Keys
    • 1.b4!
      • threat
        • 2.Rd3#
      • 1...c1S
        • 2.Sc4#
      • 1...Qc3
        • 2.Sg3#
      • 1...Qc4
        • 2.Sg3#
      • 1...Rg3
        • 2.Sd6#
      • 1...Sc5
        • 2.Sd1#
      • 1...Se5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_GUARD,SBLOCK::R(G)+S(F)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT::S(F)
      • Refutation
        • R(a);XB(A)
    • Try
      • S(F);CHECK
      • Vars
        • K(d);S_FLIGHT::R(D)
      • Refutation
        • Q(f);P_PINP(H),XR(G)
    • Try
      • Q(I);CHECK
      • Vars
        • S(e);P_SPINS(e)::R(G)+S(F)
      • Refutation
        • Q(f);CHECK,XQ(I)
  • Actual
    • P(E);
    • Threat
      • R1(D)
    • Vars
      • P(b);S_CUTR(a)::B(A)+S(B)
      • Q(f);N_GUARD::R(G)+S(F)
      • R(a);S_CUTB(c)::R(G)+S(F)
      • S(g);S_CUTQ(f)::B(A)+S(B)
      • S(g);S_CUTQ(f)::R(G)+S(F)
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Developed and maintained by Brian Stephenson.
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