MESON Chess Problem Database

Problem Display
PID: 62539 (4N2q/3rQp2/3b2pp/1N2n3/2P1k1P1/1p2pnP1/2r1P3/1B5K w - - 0 1)

Bourd, Evgeny

Problemesis, 2003

4N2q/3rQp2/3b2pp/1N2n3/2P1k1P1/1p2pnP1/2r1P3/1B5K

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Sxf6#
    • 1...Qh7
      • 2.Sf6#
    • 1...Qf8
      • 2.Sf6#
    • 1...Qg8
      • 2.Sf6#
    • 1...Ra7
      • 2.Sexd6#
    • 1...Rb7
      • 2.Sexd6#
    • 1...Rc7
      • 2.Sexd6#
    • 1...Rxe7
      • 2.Sexd6#
    • 1...Sd4
      • 2.Sc3#
    • 1...b2
      • 2.Bxc2#
  • Tries
    • 1.Qxd6?
      • threat
        • 2.Sc3#
      • 1...Rxd6
        • 2.Sexd6#
      • 1...Sxg4
        • 2.Qf4#
      • 1...Sd3
        • 2.exd3#
      • 1...Sc6
        • 2.Qf4#
      • 1...Sxc4!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qf4#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Sxc4
        • 2.Sc3#
      • 1...Sxg4
        • 2.Sc3#
      • 1...Sd3
        • 2.exf3#
      • 1...Sc6
        • 2.Sc3#
      • 1...g5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(l);N_GUARD::S(I),XQ(l)
    • Q(l);N_GUARD::S(I)
    • R(j);N_GUARD::S(I),XB(g)
    • R(j);N_GUARD,N_SPINS(f),XQ(H)::S(I),XB(g)
    • S(d);SBLOCK::S(G)
    • P(b);N_GUARD::B(A),XR(a)
  • Tries
    • Try
      • Q(H);N_PINS(f),XB(g)
      • Threat
        • S(G)
      • Vars
        • R(j);XQ(H)::S(I),XR(j)
        • S(f);OGATE,XP(F)::QAR1(H)
        • S(f);N_SPINR(a),OGATE::P(C),XS(f)
        • S(f);OGATE::QAR1(H)
      • Refutation
        • S(f);XP(E)
  • Actual
    • Q(H);N_PINS(f)
    • Threat
      • QAR1(H)
    • Vars
      • Q(l);XQ(H)::S(I),XQ(l)
      • S(f);XP(E)::S(G)
      • S(f);XP(F)::S(G)
      • S(f);N_GUARD,N_SPINR(a),SBLOCK::P(C),XS(d)
      • S(f);::S(G)
      • P(h);N_GUARD::QAB1(H)
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