MESON Chess Problem Database

Problem Display
PID: 79899 (3B4/6p1/R6b/5k2/8/3K2Q1/8/8 w - - 0 1)

Melnichuk, Aleksandr Nikolaevich

Shmatov, Vladimir Afanasievich

Variantim, 2008

3B4/6p1/R6b/5k2/8/3K2Q1/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Qxg5#
    • 1...g5
      • 2.Rf6#
    • 1...g6
      • 2.Rf6#
  • Tries
    • 1.Qh4?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Bf4!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Bc7#
        • 2.Qe4#
      • 1...Bf4!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kxg4!
    • 1.Qg6+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf4!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Qg6#
      • 1...Bg5
        • 2.Qh3#
      • 1...g5
        • 2.Qf3#
      • 1...g6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::QAR1(B),XB(b)
    • P(c);N_GUARD::R1(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • B(b);
    • Try
      • Q(B);CHECK
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAB1(B)
    • Vars
      • B(b);SBLOCK::QAB(B)
      • P(c);SBLOCK,S_CUTB(b)::QAR2(B)
      • P(c);::QAB1(B),XP(c)
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