MESON Chess Problem Database

Problem Display
PID: 228110 (B1R5/8/pB6/Pkpp4/pnp5/r1Pn4/7Q/4bK2 w - - 0 1)

Derevchuk, Oleksandr Andrinovich

64 Shakhmatnoe obozrenie, 2020

B1R5/8/pB6/Pkpp4/pnp5/r1Pn4/7Q/4bK2

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Rxc5#
    • 1...Sb2
      • 2.Rxc5#
    • 1...Sf2
      • 2.Rxc5#
    • 1...Sf4
      • 2.Rxc5#
    • 1...Se5
      • 2.Rxc5#
    • 1...Sa2
      • 2.Bc6#
    • 1...Sc2
      • 2.Bc6#
    • 1...Sc6
      • 2.Bxc6#
  • Tries
    • 1.Bd8?
      • threat
        • 2.Rb8#
        • 2.Qb8#
      • 1...Sf4
        • 2.Rb8#
      • 1...Se5
        • 2.Rb8#
      • 1...Sc6
        • 2.Bxc6#
      • 1...Bg3!
    • 1.Rb8?
      • threat
        • 2.Bc7#
        • 2.Bd8#
      • 1...Bg3
        • 2.Bc7#
      • 1...Sc6!
    • 1.Qb2?
      • threat
        • 2.Bc6#
      • 1...Sxb2
        • 2.Rxc5#
      • 1...Se5
        • 2.Rxc5#
      • 1...Rb3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Bc7#
        • 2.Bd8#
      • 1...Sc6
        • 2.Bxc6#
      • 1...Bg3
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • S(c);N_GUARD::R1(G),XP(h)
    • S(e);N_GUARD::B(F)
    • S(e);N_GUARD::B(F),XS(e)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::R(G)
        • S(e);N_GUARD::B(F),XS(e)
      • Refutation
        • B(a);
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::R(G)+B(E)
      • Refutation
        • S(e);
    • Try
      • Q(B);P_PINS(e)
      • Threat
        • B(F)
      • Vars
        • S(c);N_GUARD,N_SPINS(e),XQ(B)::R1(G),XP(h)
        • S(c);N_GUARD::R1(G),XP(h)
      • Refutation
        • R(b);N_SPINS(e)
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • S(e);N_GUARD::B(F),XS(e)
      • B(a);::QAR(B)+B(E)
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