MESON Chess Problem Database

Problem Display
PID: 15680 (6b1/8/KN4P1/1N4PQ/1kP5/1p6/n4B2/8 w - - 0 1)

Rychkov, Vladimir Nikolaevich

3rd HM., Sverdlovsk 26. Ty., 1987

6b1/8/KN4P1/1N4PQ/1kP5/1p6/n4B2/8

#2

8 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd6#
      • 1...b2
        • 2.Qa4#
      • 1...Bd5!
    • 1.Qe2?
      • threat
        • 2.Qe7#
      • 1...b2
        • 2.Qxb2#
      • 1...Be6!
    • 1.Qf3?
      • threat
        • 2.Qf8#
      • 1...b2
        • 2.Qa3#
      • 1...Bf7!
  • Keys
    • 1.Qh8!
      • 1...Bxc4
        • 2.Qf8#
      • 1...b2
        • 2.Qxb2#
      • 1...Be6
        • 2.Qf8#
      • 1...Bd5
        • 2.Qf8#
      • 1...Bf7
        • 2.Qf8#
      • 1...Bh7
        • 2.Qf8#
      • 1...Sc1
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • P(b);OGATE::QAR1(E)
      • Refutation
        • B(d);
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • P(b);OGATEB::QAR2(E),XP(b)
      • Refutation
        • B(d);
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • P(b);OGATE::QAB1(E)
      • Refutation
        • B(d);
  • Actual
    • Q(E);
    • Vars
      • B(d);OGATE,P_PINS(C),XP(B)::QAB(E)
      • P(b);OGATEB::QAR2(E),XP(b)
      • B(d);OGATE::QAB(E)
      • S(a);N_GUARD::QAB1(E)
      • S(a);N_GUARD::QAB1(E),XS(a)
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