MESON Chess Problem Database

Problem Display
PID: 12218 (1N6/3PK1p1/8/P1k2B1Q/7R/2P3n1/8/8 w - - 0 1)

Driver, John Edward

Pick of the Best Chess Problems, 1976

1N6/3PK1p1/8/P1k2B1Q/7R/2P3n1/8/8

#2

8 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Bd3#
    • 1...Kd5
      • 2.Be6#
    • 1...Sf1
      • 2.Bg6#
    • 1...Sh1
      • 2.Bg6#
    • 1...Se2
      • 2.Bg6#
    • 1...Sxf5+
      • 2.Qxf5#
  • Tries
    • 1.Bg6+?
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Sxh5!
    • 1.Qf3?
      • threat
        • 2.Qc6#
      • 1...Sxf5+
        • 2.Qxf5#
      • 1...Kb5
        • 2.Qd5#
      • 1...Se4!
    • 1.Qg4?
      • threat
        • 2.Qc4#
      • 1...Sxf5+
        • 2.Qxf5#
      • 1...Kb5
        • 2.Qb4#
      • 1...Kd5
        • 2.Qd4#
      • 1...Se4!
    • 1.Qf7?
      • threat
        • 2.Qc4#
      • 1...Sxf5+
        • 2.Qxf5#
      • 1...Kb5
        • 2.Qd5#
      • 1...Se4!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qc6#
      • 1...Sxf5+
        • 2.Qxf5#
      • 1...Kb5
        • 2.Qb6#
      • 1...Kd5
        • 2.Qd6#

Anticipated by 10646(1966)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(b);P-FLIGHT::QAR(E)+B(D),DCHECK
    • S(a);N_GUARD::QAR(E)+B(D)
    • S(a);CHECK,OGATE,P_SPINS(a),XB(D)::QAR(E),XS(a)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • S(a);CHECK,N_GUARD,P_SPINS(a)::QAR(E),XS(a)
      • Refutation
        • S(a);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(a);CHECK,OGATE,XB(D)::QAR(E),XS(a)
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • S(a);
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(a);CHECK,OGATE,XB(D)::QAR(E),XS(a)
        • K(b);P-FLIGHT::QAR1(E)
      • Refutation
        • S(a);
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(a);CHECK,OGATE,XB(D)::QAR(E),XS(a)
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • S(a);
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • S(a);CHECK,OGATE,XB(D)::QAR(E),XS(a)
      • K(b);P-FLIGHT::QAR1(E)
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