MESON Chess Problem Database

Problem Display
PID: 190274 (8/2K5/2nPp3/1pNkPpP1/3P1q1R/1Pn5/2NR4/Q7 w - - 0 1)

Muha, Boris

Suomen Shakki, 1983

8/2K5/2nPp3/1pNkPpP1/3P1q1R/1Pn5/2NR4/Q7

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Se3#
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qf1
      • 2.Se3#
    • 1...Qg4
      • 2.Se3#
    • 1...Qxh4
      • 2.Se3#
    • 1...Sb4
      • 2.Sxb4#
    • 1...Sa5
      • 2.Sb4#
    • 1...Sxe5
      • 2.Sb4#
    • 1...Sa7
      • 2.Sb4#
    • 1...Se7
      • 2.Sb4#
    • 1...Sb8
      • 2.Sb4#
    • 1...Sd8
      • 2.Sb4#
  • Tries
    • 1.Qh1+?
      • 1...Qf3
        • 2.Se3#
      • 1...Qe4
        • 2.Se3#
      • 1...Se4!
    • 1.Qa8?
      • threat
        • 2.Sb4#
        • 2.Qxc6#
      • 1...Sa2
        • 2.Qxc6#
      • 1...b4
        • 2.Sxb4#
        • 2.Qxc6#
      • 1...Qxd4!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.Qh1#
      • 1...Qxe5
        • 2.Sb6#
      • 1...Qxg5
        • 2.Sb6#
      • 1...Qxd4
        • 2.Se3#
      • 1...Sxd4
        • 2.Qa8#
      • 1...Se4
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::S(B)
    • Q(b);N_GUARD::S(B),XQ(b)
    • Q(b);N_GUARD,XR(F)::S(B)
    • S(f);N_GUARD::S(B),XS(f)
    • S(f);N_GUARD::S(B)
    • S(f);N_GUARD,XP(H)::S(B)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::S(B)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);P_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(A),XS(f)
      • Refutation
        • Q(b);P_SPINQ(b),XP(E)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);P_SPINQ(b),S_FLIGHT::QAB(A)
      • Q(b);P_PINP(J),XP(H)::S(G)
      • Q(b);XP(I)::S(G)
      • Q(b);N_GUARD,P_SPINQ(b),XP(E)::S(B)
      • S(f);OGATEB,P_SPINS(f),XP(E)::QAB(A)
      • S(a);SBLOCK::S(G)
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