MESON Chess Problem Database

Problem Display
PID: 98864 (b1Q1NB1n/K2pr3/pp2k2r/qp6/3P1R2/b1p2B2/8/8 w - - 0 1)

Stoyanov, Kiril N

Problemas, 1971

b1Q1NB1n/K2pr3/pp2k2r/qp6/3P1R2/b1p2B2/8/8

#2

7 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Rf6#
    • 1...Rh2
      • 2.Rf6#
    • 1...Rh3
      • 2.Rf6#
    • 1...Rh4
      • 2.Rf6#
    • 1...Rh5
      • 2.Rf6#
    • 1...Rf6
      • 2.Rxf6#
    • 1...Rhh7
      • 2.Rf6#
    • 1...Rf7
      • 2.Sc7#
    • 1...Rg7
      • 2.Sc7#
      • 2.Sxg7#
    • 1...Reh7
      • 2.Sc7#
    • 1...Bd5
      • 2.Bg4#
    • 1...Sg6
      • 2.Rf6#
  • Tries
    • 1.Sg7+?
      • 1...Kd6
        • 2.Qb8#
      • 1...Rxg7!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Rf6
        • 2.Rxf6#
      • 1...Rh5
        • 2.Rf6#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Sg6
        • 2.Rf6#
      • 1...Sf7
        • 2.Sg7#
      • 1...b4
        • 2.Qd6#
      • 1...d5
        • 2.Bg4#
      • 1...d6
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(h);N_GUARD::R1(C)
    • R(h);N_GUARD::R1(C),XR(h)
    • R(j);::S(F)
    • B(k);SBLOCK::B(A)
    • S(l);S_CUTR(h)::R1(C)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINP(i),P-FLIGHT,P_SPINR(j)::QAB(E)
      • Refutation
        • R(j);XS(F)
  • Actual
    • Q(E);N_PINP(i)
    • Threat
      • QAR1(E)
    • Vars
      • R(h);N_GUARD::R1(C),XR(h)
      • R(h);N_GUARD::R1(C)
      • B(a);N_GUARD::QAR1(E),XB(a)
      • S(l);S_CUTR(h)::R1(C)
      • S(l);S_CUTR(j)::S(F)
      • P(d);S_CUTB(a)::QAR1(E)
      • P(i);P_PINQ(E),SBLOCK::B(A)
      • P(i);OGATE,P_PINQ(E)::QAR1(E),XR(j)
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