MESON Chess Problem Database

Problem Display
PID: 276083 (nn2Q1b1/K4p2/1p3P2/1PPkN2p/R2Pp1rr/1p2P2B/2q5/2R5 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Springaren, 1993

nn2Q1b1/K4p2/1p3P2/1PPkN2p/R2Pp1rr/1p2P2B/2q5/2R5

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Qxf7#
    • 1...Sa6
      • 2.Qc6#
      • 2.Qd7#
    • 1...Sc6+
      • 2.Qxc6#
    • 1...Sd7
      • 2.Qxd7#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qe5#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Qh2
        • 2.Sb4#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Rg5!
    • 1.Sxg4?
      • threat
        • 2.Qe5#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Qh2!
    • 1.Sg6?
      • threat
        • 2.Qe5#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Rg5
        • 2.Se7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Qh2!
    • 1.Sxf7?
      • threat
        • 2.Qe5#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Rg5
        • 2.Be6#
        • 2.Qe6#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Qh2!
    • 1.Qd8+?
      • 1...Sd7
        • 2.Qxd7#
      • 1...Ke6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qe5#
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Rg5
        • 2.Se7#
      • 1...Qh2
        • 2.Sb4#
      • 1...Sd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(l);N_GUARD::QAB(K),XP(i)
    • S(k);CHECK,N_GUARD::QAB1(K),XS(k)
    • S(k);N_GUARD::QAR2(K),XS(k)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(K)
      • Vars
        • S(k);CHECK,N_GUARD::QAB1(K),XS(k)
        • Q(a);::S(H)
        • S(k);N_GUARD::QAR2(K),XS(k)
      • Refutation
        • R(d);
    • Try
      • S(H);XR(d)
      • Threat
        • QAR1(K)
      • Vars
        • S(k);CHECK,N_GUARD::QAB1(K),XS(k)
        • S(k);N_GUARD::QAR2(K),XS(k)
      • Refutation
        • Q(a);
    • Try
      • S(H);
      • Threat
        • QAR1(K)
      • Vars
        • S(k);CHECK,N_GUARD::QAB1(K),XS(k)
        • R(d);::S(H)
        • S(k);N_GUARD::QAR2(K),XS(k)
      • Refutation
        • Q(a);
    • Try
      • S(H);XP(i)
      • Threat
        • QAR1(K)
      • Vars
        • S(k);CHECK,N_GUARD::QAB1(K),XS(k)
        • S(k);N_GUARD::QAR2(K),XS(k)
      • Refutation
        • Q(a);
    • Try
      • Q(K);CHECK
      • Vars
        • S(k);N_GUARD,P_SPINS(k)::QAR2(K),XS(k)
      • Refutation
        • K(f);P_SPINR(d),S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • QAR1(K)
    • Vars
      • S(k);CHECK,OGATE,XS(H)::QAB1(K),XS(k)
      • R(d);::S(H)
      • Q(a);::S(H)
      • S(k);N_GUARD::QAR2(K),XS(k)
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