MESON Chess Problem Database

Problem Display
PID: 9387 (3B4/3p1b2/4k3/8/3K4/8/8/Q7 w - - 0 1)

Steif, Adolf

Das neue illustrierte Blatt, 1902

3B4/3p1b2/4k3/8/3K4/8/8/Q7

#2

3 + 3

4331 Schachminiaturen II 1903
3295 Einfuhrung in die Welt des Schachproblem 1984
3713 Snap 2003
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qa6#
  • Tries
    • 1.Qe1+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6!
    • 1.Qf1?
      • threat
        • 2.Qf6#
      • 1...Kd6
        • 2.Qa6#
      • 1...d6
        • 2.Qh3#
      • 1...d5!
    • 1.Qh1?
      • threat
        • 2.Qd5#
      • 1...Kf5
        • 2.Qe4#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qh3#
      • 1...Kd6!
    • 1.Qa2+?
      • 1...Kd6
        • 2.Qa6#
      • 1...d5
        • 2.Qxd5#
      • 1...Kf5!
    • 1.Qa5?
      • threat
        • 2.Qd5#
        • 2.Qe5#
      • 1...Kd6
        • 2.Qb6#
        • 2.Qa6#
      • 1...Bh5
        • 2.Qd5#
      • 1...Bg6
        • 2.Qd5#
      • 1...Be8
        • 2.Qd5#
      • 1...Bg8
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...d6!
    • 1.Qa6+?
      • 1...d6
        • 2.Qc8#
      • 1...Kf5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qd5#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6
        • 2.Qa6#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qc8#

This anticipates 17820(1951), 80735(1962)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • P(b);::QAB1(A),XP(b)
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(b);P_SPINP(b)::QAB1(A),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::QAB1(A)
        • P(b);::QAB1(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR(A)
      • P(b);::QAB1(A),XP(b)
      • P(b);OGATEB,SBLOCK::QAB(A)
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