MESON Chess Problem Database

Problem Display
PID: 233548 (b2r4/R4P1p/RNq2k1P/2p1p1pK/2B1Q3/2n3p1/3N4/7n w - - 0 1)

Viksna, Kristaps

Freie Presse, 1975

b2r4/R4P1p/RNq2k1P/2p1p1pK/2B1Q3/2n3p1/3N4/7n

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Sd5#
    • 1...Qb5
      • 2.Sd5#
    • 1...Qd5
      • 2.Sxd5#
    • 1...Qe8
      • 2.Sd5#
    • 1...Qc8
      • 2.Sd5#
    • 1...Rxd2
      • 2.f8Q#
      • 2.f8R#
    • 1...Rd3
      • 2.f8Q#
      • 2.f8R#
    • 1...Rd4
      • 2.f8Q#
      • 2.f8R#
    • 1...Rd6
      • 2.f8Q#
      • 2.f8R#
    • 1...Rg8
      • 2.fxg8S#
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxg5#
      • 1...Qf3
        • 2.Sd5#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Rd5
        • 2.f8Q#
        • 2.f8R#
      • 1...Rg8
        • 2.fxg8S#
      • 1...Se4
        • 2.Qf3#
      • 1...Sd5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(g);::R(E)+S(F),DCHECK
    • Q(g);::R(E)+S(F),DCHECK,XQ(g)
    • Q(g);P_PINP(I)::R(E)+S(F),DCHECK
    • R(k);N_GUARD,XS(A)::P=Q
    • R(k);N_GUARD::P=Q
    • R(k);OGATE::PXR(k)=S
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XP(f)
    • Vars
      • Q(g);P_PINQ(C)::R(E)+S(F),DCHECK
      • Q(g);::R(E)+S(F),DCHECK,XQ(g)
      • R(k);N_GUARD::P=Q
      • R(k);OGATE::PXR(k)=S
      • S(b);S_CUTQ(g)::QAR(C)
      • S(b);N_GUARD,S_CUTQ(g)::S(A)
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Developed and maintained by Brian Stephenson.
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