MESON Chess Problem Database

Problem Display
PID: 178533 (8/3p2bK/2nQ4/1pr2N1R/R2nk2p/4P3/4Pp1q/3N4 w - - 0 1)

Viksna, Kristaps

Busmen's Chess Review, 1965

8/3p2bK/2nQ4/1pr2N1R/R2nk2p/4P3/4Pp1q/3N4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sxf2#
    • 1...Qxd6
      • 2.Sxd6#
    • 1...Qh1
      • 2.Sxf2#
    • 1...Qh3
      • 2.Sxf2#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rd5
      • 2.Sc3#
    • 1...Re5
      • 2.Sc3#
    • 1...Se5
      • 2.Rxd4#
      • 2.Qxd4#
  • Tries
    • 1.Sg3+?
      • 1...hxg3
        • 2.Qf4#
      • 1...Qxg3!
    • 1.Qe6+?
      • 1...Qe5
        • 2.Sxf2#
        • 2.Sd6#
        • 2.Rxh4#
      • 1...Re5
        • 2.Sc3#
        • 2.Sd6#
      • 1...Be5
        • 2.Sd6#
      • 1...Se5
        • 2.Sd6#
        • 2.Rxd4#
      • 1...dxe6!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Sg3#
        • 2.Sd6#
      • 1...Kd5
        • 2.Se7#
      • 1...Ke5
        • 2.Sxd4#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Qg3
        • 2.Sxg3#
        • 2.Sd6#
      • 1...Qe5
        • 2.Qg2#
      • 1...Qd6
        • 2.Sg3#
        • 2.Sxd6#
      • 1...Re5
        • 2.Sc3#
      • 1...Be5
        • 2.Se7#
      • 1...Se5
        • 2.Rxd4#
      • 1...d6
        • 2.Sg3#
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::S(A),XP(a)
    • Q(b);XQ(G)::S(E),XQ(b)
    • R(g);N_GUARD::S(A),XR(g)
    • R(g);N_GUARD::S(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(e);P_PINR(F),XS(E)::QAR1(G)
      • Refutation
        • Q(b);XS(E)
    • Try
      • Q(G);CHECK
      • Vars
        • B(j);P_SPINB(j)::S(E)
      • Refutation
        • P(i);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);N_SPINS(c),S_FLIGHT::R(F)+S(E),DCHECK
      • K(d);N_SPINS(c),P-FLIGHT::R(F)+S(E),XS(c)
      • R(g);OGATE,P_SPINR(g),XS(E)::QAB1(G),XR(g)
      • Q(b);N_GUARD,SBLOCK::QAB(G)
      • R(g);N_GUARD,SBLOCK::S(A)
      • B(j);S_CUTR(g)::QAB(G)+S(E)
      • S(h);N_GUARD,SBLOCK,S_CUTB(j)::R1(D),XS(c)
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