MESON Chess Problem Database

Problem Display
PID: 68104 (b7/p3NK2/r2p1Bp1/p2p2Rp/Q2Pk3/3p2P1/B2P2P1/q2N2b1 w - - 0 1)

Velko, Aleksandrov

Phenix, 1999

b7/p3NK2/r2p1Bp1/p2p2Rp/Q2Pk3/3p2P1/B2P2P1/q2N2b1

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qxd4
      • 2.Sc3#
    • 1...Qb1
      • 2.Sc3#
    • 1...Qxa2
      • 2.Sc3#
    • 1...Rc6
      • 2.Bxd5#
    • 1...Bf2
      • 2.Sxf2#
    • 1...Bh2
      • 2.Sf2#
    • 1...Bxd4
      • 2.Sf2#
    • 1...h4
      • 2.Rg4#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Qe8#
      • 1...Qxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.Sf2#
      • 1...Bc6
        • 2.Sxd6#
      • 1...Rc6!
    • 1.Sc6?
      • threat
        • 2.Bxd5#
      • 1...Qxa2
        • 2.Sc3#
      • 1...Bxc6!
    • 1.Sxg6?
      • threat
        • 2.Qe8#
      • 1...Qxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.Sf2#
      • 1...Rc6
        • 2.Bxd5#
      • 1...Bc6!
    • 1.Sg8?
      • threat
        • 2.Qe8#
      • 1...Qxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.Sf2#
      • 1...Rc6
        • 2.Bxd5#
      • 1...Bc6!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Qe8#
      • 1...Qxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.Sf2#
      • 1...Rc6
        • 2.Bxd5#
      • 1...Bc6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(A)
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD,XB(B)::S(A)
    • R(h);S_CUTB(l)::B(B),XP(f)
    • B(b);N_GUARD::S(A),XB(b)
    • B(b);N_GUARD::S(A)
    • B(b);N_GUARD,P_SPINB(b),XP(G)::S(A)
    • P(g);N_GUARD::R(H)
  • Tries
    • Try
      • S(J);
      • Threat
        • QAR(F)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(A)
        • B(b);N_GUARD,P_SPINB(b),XP(G)::S(A)
        • B(l);S_CUTR(h)::S(J),XP(i)
      • Refutation
        • R(h);
    • Try
      • S(J);
      • Threat
        • B(B),XP(f)
      • Vars
        • Q(a);N_GUARD,XB(B)::S(A)
      • Refutation
        • B(l);XS(J)
    • Try
      • S(J);XP(j)
      • Threat
        • QAR(F)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(A)
        • B(b);N_GUARD,P_SPINB(b),XP(G)::S(A)
        • R(h);S_CUTB(l)::B(B),XP(f)
      • Refutation
        • B(l);
    • Try
      • S(J);
      • Threat
        • QAR(F)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(A)
        • B(b);N_GUARD,P_SPINB(b),XP(G)::S(A)
        • R(h);S_CUTB(l)::B(B),XP(f)
      • Refutation
        • B(l);
  • Actual
    • S(J);
    • Threat
      • QAR(F)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(A)
      • B(b);N_GUARD,P_SPINB(b),XP(G)::S(A)
      • R(h);S_CUTB(l)::B(B),XP(f)
      • B(l);S_CUTR(h)::S(J),XP(i)
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