MESON Chess Problem Database

Problem Display
PID: 177437 (6Kn/2R4Q/N7/1b1kB3/5PB1/b7/3n4/8 w - - 0 1)

Rogoshin, Fyodor Ivanovich

Probleemblad, 1978

6Kn/2R4Q/N7/1b1kB3/5PB1/b7/3n4/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Sb4#
      • 2.Rc5#
    • 1...Bb2
      • 2.Sb4#
      • 2.Rc5#
    • 1...Bb4
      • 2.Sxb4#
    • 1...Bc5
      • 2.Rxc5#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Ba4
      • 2.Qd3#
    • 1...Bc6
      • 2.Qd3#
    • 1...Bd7
      • 2.Qd3#
    • 1...Be8
      • 2.Qd3#
    • 1...Sb1
      • 2.Qh1#
    • 1...Sf1
      • 2.Qh1#
    • 1...Sb3
      • 2.Qh1#
    • 1...Sc4
      • 2.Qd3#
      • 2.Qh1#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Be6#
      • 1...Bd7
        • 2.Qd3#
      • 1...Sxg6!
    • 1.Qh1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Se4!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qd3#
      • 1...Kxc4
        • 2.Be6#
      • 1...Bxc4
        • 2.Qb7#
      • 1...Sxc4
        • 2.Qh1#
      • 1...Bc5
        • 2.Rxc5#
      • 1...Bb2
        • 2.Rc5#
      • 1...Sb3
        • 2.Qe4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sg6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • B(b);N_GUARD::S(D),XB(b)
    • B(b);N_GUARD::R1(E),XB(b)
    • B(c);N_GUARD::QAR2(F),XB(c)
    • B(c);N_GUARD::QAR2(F)
    • S(a);N_GUARD::QAB(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • B(B)
      • Vars
        • B(c);N_GUARD::QAR2(F)
      • Refutation
        • S(e);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(F),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • R(E);
    • Threat
      • QAR2(F)
    • Vars
      • K(d);S_FLIGHT,XR(E)::B(B)
      • B(c);N_GUARD,SBLOCK,XR(E)::QAB(F)
      • S(a);N_GUARD,SBLOCK,XR(E)::QAB(F)
      • B(b);N_GUARD::R1(E),XB(b)
      • B(b);N_GUARD::R1(E)
      • S(a);N_GUARD::QAB1(F)
      • S(a);N_GUARD::QAB1(F),XS(a)
      • S(e);N_GUARD::QAB(F)
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