MESON Chess Problem Database

Problem Display
PID: 142585 (5K2/5N2/5k2/3P3P/5Pbq/4Q2B/8/b7 w - - 0 1)

Bylevski, Aleksandr

Bylevski, Boris

Phenix, 1990

5K2/5N2/5k2/3P3P/5Pbq/4Q2B/8/b7

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxe5#
    • 1...Bd1
      • 2.Qb6#
      • 2.Qe6#
      • 2.Qe7#
    • 1...Be2
      • 2.Qb6#
      • 2.Qe6#
      • 2.Qe7#
    • 1...Bf3
      • 2.Qb6#
      • 2.Qe6#
      • 2.Qe7#
    • 1...Bf5
      • 2.Qe7#
    • 1...Bxh5
      • 2.Qb6#
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Bd7
      • 2.Qe7#
    • 1...Bc8
      • 2.Qe7#
  • Tries
    • 1.Qd4+?
      • 1...Kf5
        • 2.Sd6#
        • 2.Sh6#
      • 1...Bxd4!
    • 1.Qb6+?
      • 1...Be6
        • 2.Qd8#
        • 2.Qxe6#
      • 1...Kf5!
    • 1.Qd3?
      • threat
        • 2.Qg6#
      • 1...Bxh5
        • 2.Qf5#
        • 2.Qa6#
      • 1...Qg5
        • 2.fxg5#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Qxh5!
    • 1.Qe4?
      • threat
        • 2.Qg6#
      • 1...Bxh5
        • 2.Qf5#
        • 2.Qe6#
      • 1...Qg5
        • 2.fxg5#
      • 1...Bf5
        • 2.Qxf5#
        • 2.Qe7#
      • 1...Qxh5!
  • Keys
    • 1.f5!
      • threat
        • 2.Qe6#
      • 1...Kxf5
        • 2.Qf3#
      • 1...Bxf5
        • 2.Qe7#
      • 1...Qe1
        • 2.Qg5#
      • 1...Be5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB1(A),XB(a)
    • B(b);::QAB1(A)
    • B(b);N_GUARD::QAR1(A),XB(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(d);P-FLIGHT,P_SPINB(b)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);OGATE::P(C),XQ(c)
        • B(b);N_GUARD::QAR1(A),XB(b)
      • Refutation
        • Q(c);XP(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);OGATE::P(C),XQ(c)
      • Refutation
        • Q(c);XP(E)
  • Actual
    • P(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINB(b),XP(C)::QAR2(A)
      • B(b);XP(C)::QAB1(A)
      • Q(c);N_GUARD::QAB1(A)
      • B(a);N_GUARD::QAB1(A),XB(a)
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