MESON Chess Problem Database

Problem Display
PID: 171270 (5K2/5Q2/8/3BP3/3pR1p1/p2kBbRn/N1pp2p1/1nb2rN1 w - - 0 1)

Archakov, Vladimir Mikhailovich

64 Shakhmatnoe obozrenie, 1968

5K2/5Q2/8/3BP3/3pR1p1/p2kBbRn/N1pp2p1/1nb2rN1

#2

9 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Rxd4#
    • 1...Be2
      • 2.Rxd4#
    • 1...Bxe4
      • 2.Bc4#
    • 1...Sc3
      • 2.Sb4#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qa6#
      • 1...Bd1
        • 2.Rxd4#
      • 1...Be2
        • 2.Rxd4#
      • 1...Sc3
        • 2.Sb4#
      • 1...Bxe4!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qa6#
      • 1...Bd1+
        • 2.Rf4#
      • 1...Be2+
        • 2.Rf4#
      • 1...Bxe4+
        • 2.Bf2#
      • 1...Sc3
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(i);P_PINQ(H)::R1(E),XP(k)
    • B(i);P_PINQ(H),SBLOCK,XR(E)::B(F)
    • S(a);SBLOCK::S(B)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • B(i);P_PINQ(H)::R1(E),XP(k)
        • S(a);SBLOCK::S(B)
      • Refutation
        • B(i);P_PINQ(H),XR(E)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • B(i);CHECK,N_GUARD::QAB(H)+R(E)
      • B(i);CHECK,OGATEB,P_SPINB(i),XR(E)::R(D)+B(C)
      • S(a);SBLOCK::S(B)
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