MESON Chess Problem Database

Problem Display
PID: 178044 (K2Q3n/1ppB1Rp1/b1pNp3/2Pk2r1/1P6/2n3pq/3N4/B2R4 w - - 0 1)

Bylevski, Aleksandr

Boletim da UBP, 1989

K2Q3n/1ppB1Rp1/b1pNp3/2Pk2r1/1P6/2n3pq/3N4/B2R4

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.S2c4#
    • 1...Ke5
      • 2.Sf3#
    • 1...Sa2
      • 2.S2c4#
    • 1...Sa4
      • 2.S2c4#
  • Tries
    • 1.Sf3+?
      • 1...Bd3
        • 2.Rxd3#
      • 1...Sxd1!
    • 1.Bxc6+?
      • 1...Kd4
        • 2.S2c4#
      • 1...Ke5
        • 2.Sf3#
        • 2.Bxc3#
      • 1...bxc6
        • 2.S6c4#
      • 1...Kxc6!
    • 1.Be8?
      • threat
        • 2.S6c4#
      • 1...Kd4
        • 2.S2c4#
      • 1...Ke5
        • 2.Sf3#
      • 1...Sxf7
        • 2.Sxf7#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bc4
        • 2.S6xc4#
      • 1...Se4
        • 2.S6xe4#
      • 1...Sb5
        • 2.Sxb5#
      • 1...e5!
  • Keys
    • 1.Bc8!
      • threat
        • 2.S6c4#
      • 1...Kd4
        • 2.S2c4#
      • 1...Ke5
        • 2.Sf3#
      • 1...Sxf7
        • 2.Sxf7#
      • 1...cxd6
        • 2.Qxd6#
      • 1...Bc4
        • 2.S6xc4#
      • 1...Se4
        • 2.S6xe4#
      • 1...Sb5
        • 2.Sxb5#
      • 1...e5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • K(d);P-FLIGHT,P_SPINS(a)::R(B)+S(C)
    • K(d);P-FLIGHT,P_SPINS(a)::S(C)
    • S(a);N_GUARD::R(B)+S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::R(B),XB(f)
      • Refutation
        • S(a);XR(B)
    • Try
      • B(G);CHECK,XP(g)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(a)::R(B)+S(C)
        • P(i);SBLOCK,XB(G)::QAR(J)+S(F)
      • Refutation
        • K(d);S_FLIGHT,XB(G)
    • Try
      • B(G);
      • Threat
        • QAR(J)+S(F)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(a)::R(B)+S(C)
        • K(d);P-FLIGHT,P_SPINS(a)::S(C)
        • S(l);XR(H)::QAR(J)+S(F),XS(l)
        • P(j);OGATE,P_SPINP(j),XS(F)::QAR1(J),XP(j)
        • B(f);::QAR(J)+S(F),XB(f)
        • S(a);::QAR(J)+S(F),XS(a)
      • Refutation
        • P(h);
  • Actual
    • B(G);
    • Threat
      • QAR(J)+S(F)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(a)::R(B)+S(C)
      • K(d);P-FLIGHT,P_SPINS(a)::S(C)
      • S(l);XR(H)::QAR(J)+S(F),XS(l)
      • P(j);OGATE,P_SPINP(j),XS(F)::QAR1(J),XP(j)
      • B(f);::QAR(J)+S(F),XB(f)
      • S(a);::QAR(J)+S(F),XS(a)
      • P(h);SBLOCK::QAR(J)+S(F)
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