MESON Chess Problem Database

Problem Display
PID: 97059 (4nR2/2N2r1b/3n1p2/3Bpk1p/3PN3/4rpQP/8/6RK w - - 0 1)

Shedey, Sergey Oleksandrovich

Problem (Zagreb), 1968

4nR2/2N2r1b/3n1p2/3Bpk1p/3PN3/4rpQP/8/6RK

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxf3#
    • 1...Re2
      • 2.Qxf3#
    • 1...Rxe4
      • 2.Be6#
    • 1...Rxc7
      • 2.Qxe5#
      • 2.Qg5#
    • 1...Rd7
      • 2.Qxe5#
      • 2.Qg5#
    • 1...Re7
      • 2.Qg5#
    • 1...Rg7
      • 2.Qxe5#
    • 1...Sxe4
      • 2.Be6#
    • 1...Sxc7
      • 2.Sxd6#
    • 1...Sg7
      • 2.Sxd6#
    • 1...h4
      • 2.Qg4#
  • Tries
    • 1.Rxf7?
      • threat
        • 2.Qxe5#
        • 2.Qg5#
      • 1...Rxe4
        • 2.Be6#
        • 2.Qg5#
      • 1...Sxe4
        • 2.Be6#
        • 2.Qxe5#
      • 1...exd4
        • 2.Qg5#
      • 1...Sc4
        • 2.Qg5#
      • 1...Sxf7!
    • 1.Qh4?
      • threat
        • 2.Be6#
      • 1...Rxc7
        • 2.Rg5#
        • 2.Qg5#
      • 1...Sxc7
        • 2.Sxd6#
      • 1...Re7
        • 2.Rg5#
        • 2.Qg5#
      • 1...Sg7
        • 2.Sxd6#
      • 1...exd4!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Se6#
      • 1...Bxg6!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Qg5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Rg7
        • 2.Be6#
      • 1...Se4
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD,P_PINR(A)::QAR2(C),XP(b)
    • R(a);N_GUARD::QAR2(C),XP(b)
    • R(a);SBLOCK,XS(F)::B(G)
    • R(h);P_SPINP(g)::QAR1(C)
    • R(h);P_SPINP(g)::QAR1(C),XP(c)
    • S(f);SBLOCK,XS(F)::B(G)
    • S(j);N_GUARD,XS(H)::S(F),XS(f)
    • S(j);N_GUARD::S(F),XS(f)
    • P(e);N_GUARD::QAB1(C)
  • Tries
    • Try
      • R(I);P_PINP(g),XR(h)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XP(E)::QAR1(C)
        • S(f);::QAR1(C)
      • Refutation
        • S(f);N_SPINP(g),XR(I)
    • Try
      • Q(C);
      • Threat
        • B(G)
      • Vars
        • S(j);N_GUARD,XS(H)::S(F),XS(f)
        • S(j);N_GUARD::S(F),XS(f)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);P-FLIGHT::S(H)
      • Refutation
        • B(i);XQ(C)
  • Actual
    • S(F);XP(g)
    • Threat
      • QAR1(C)
    • Vars
      • K(d);P-FLIGHT,P_SPINR(h),XS(F)::QAB1(C)
      • R(h);::B(G)
      • S(f);S_CUTR(a)::QAR1(C),XP(c)
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