MESON Chess Problem Database

Problem Display
PID: 270392 (5b2/K1p2r2/2Q1p2r/1NpNk1P1/1Rn4n/p2Pp2B/b4PR1/2B1q3 w - - 0 1)

Erokhin, Vladimir Alekseevich

Shakhmatnaya kompozitsiya, 1997

5b2/K1p2r2/2Q1p2r/1NpNk1P1/1Rn4n/p2Pp2B/b4PR1/2B1q3

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Qxe6#
    • 1...Rhh7
      • 2.Qxe6#
    • 1...Rh8
      • 2.Qxe6#
    • 1...Rd7
      • 2.f4#
    • 1...Re7
      • 2.f4#
    • 1...Rg7
      • 2.f4#
    • 1...Rfh7
      • 2.f4#
    • 1...Sb2
      • 2.Re4#
    • 1...Sa5
      • 2.Re4#
    • 1...Sb6
      • 2.Re4#
    • 1...Sf5
      • 2.f4#
    • 1...Sg6
      • 2.Qxe6#
  • Tries
    • 1.Se7?
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...exf2
        • 2.Qxc5#
      • 1...Rf4
        • 2.Qxc5#
      • 1...Sd2
        • 2.Qxc7#
      • 1...Sd6!
    • 1.Bb2+?
      • 1...Qc3
        • 2.Bxc3#
      • 1...Sxb2
        • 2.Re4#
      • 1...axb2!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...exf2
        • 2.Qxe6#
      • 1...Sd2
        • 2.f4#
      • 1...Sd6
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • R(j);N_GUARD::QAR1(J),XP(i)
    • R(l);N_GUARD::P(B)
    • S(e);OGATE::R1(F)
    • S(f);S_CUTR(l)::P(B)
    • S(f);S_CUTR(j)::QAR1(J),XP(i)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAR1(J)
      • Vars
        • K(h);P_SPINP(d),P_SPINS(e),S_FLIGHT::QAR1(J)
        • P(d);XP(B)::QAR2(J),XP(g)
        • R(l);SBLOCK::QAR2(J),XP(g)
        • S(e);N_GUARD::QAB(J),XP(k)
      • Refutation
        • S(e);
    • Try
      • B(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
        • S(e);OGATE,XB(A)::R1(F)
      • Refutation
        • P(c);XB(A)
  • Actual
    • S(H);
    • Threat
      • QAR1(J)
    • Vars
      • K(h);P_SPINP(d),P_SPINS(e),S_FLIGHT::QAR1(J)
      • P(d);XP(B)::QAR1(J),XP(i)
      • S(e);::P(B)
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