MESON Chess Problem Database

Problem Display
PID: 8203 (Q3b3/3N2N1/4p1nK/1rpn3B/4krR1/1R1pP1b1/3PPB2/8 w - - 0 1)

Veders, Visvaldis M

The Problemist, 1995

Q3b3/3N2N1/4p1nK/1rpn3B/4krR1/1R1pP1b1/3PPB2/8

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Sf6#
    • 1...e5
      • 2.Sf6#
  • Tries
    • 1.Rxf4+?
      • 1...Sxf4
        • 2.Bf3#
      • 1...Bxf4+!
    • 1.Rg5?
      • threat
        • 2.exd3#
      • 1...Rxb3
        • 2.Sxc5#
      • 1...dxe2
        • 2.d3#
      • 1...Rg4
        • 2.Sf6#
      • 1...Se5
        • 2.Rxe5#
      • 1...c4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qh1#
      • 1...Bxd7
        • 2.Bxg6#
      • 1...Sxe3
        • 2.Sf6#
      • 1...Sh4
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(i);SBLOCK::S(I)
    • P(h);SBLOCK::S(I)
  • Tries
    • Try
      • R(F);CHECK,XR(d)
      • Vars
        • S(i);XR(F)::B(G)
      • Refutation
        • B(b);CHECK,XR(F)
    • Try
      • R(F);N_PINR(d)
      • Threat
        • P(B),XP(a)
      • Vars
        • R(e);N_GUARD,XR(D)::S(I),XP(f)
        • P(a);OGATE,XP(B)::P(A)
        • R(d);N_GUARD::S(I)
        • S(i);N_GUARD::R1(F),XS(i)
      • Refutation
        • P(f);
  • Actual
    • Q(K);N_PINS(g)
    • Threat
      • QAB(K)
    • Vars
      • B(j);N_GUARD,XS(I)::B(G),XS(i)
      • S(g);N_GUARD,XP(E)::S(I)
      • S(i);N_GUARD::QAR1(K)
      • S(i);N_GUARD::QAR1(K),XS(i)
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