MESON Chess Problem Database

Problem Display
PID: 224459 (8/B7/3p4/8/8/K2pp3/1Q1Nk3/R7 w - - 0 1)

Wheeler, Charles Henry

Philadelphia Times, 1887

8/B7/3p4/8/8/K2pp3/1Q1Nk3/R7

#2

5 + 4

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qe1#
      • 1...exd2
        • 2.Qd1#
        • 2.Qf1#
      • 1...Kf2!
    • 1.Qd4?
      • threat
        • 2.Qxe3#
      • 1...Kxd2
        • 2.Qb2#
      • 1...exd2
        • 2.Qf2#
        • 2.Qe3#
        • 2.Qe4#
        • 2.Qg4#
      • 1...Kf2!
    • 1.Qe5?
      • threat
        • 2.Qh2#
        • 2.Qxe3#
      • 1...Kxd2
        • 2.Qb2#
      • 1...Kf2
        • 2.Qh2#
      • 1...dxe5!
    • 1.Qf6?
      • 1...Kxd2
        • 2.Qb2#
      • 1...exd2
        • 2.Qf1#
        • 2.Qf2#
      • 1...d5!
    • 1.Qg7?
      • threat
        • 2.Qg2#
      • 1...Kxd2
        • 2.Qb2#
      • 1...Kf2!
    • 1.Qb1?
      • threat
        • 2.Qe1#
      • 1...Kxd2
        • 2.Qb2#
      • 1...exd2
        • 2.Qd1#
        • 2.Qf1#
      • 1...Kf2!
    • 1.Qb6?
      • threat
        • 2.Qxe3#
      • 1...Kxd2
        • 2.Qb2#
      • 1...exd2
        • 2.Qf2#
        • 2.Qe3#
      • 1...Kf2!
    • 1.Qb7?
      • threat
        • 2.Qg2#
      • 1...Kxd2
        • 2.Qb2#
      • 1...Kf2
        • 2.Qf3#
      • 1...d5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh2#
      • 1...Kxd2
        • 2.Qb2#
      • 1...Kf2
        • 2.Qh2#
      • 1...exd2
        • 2.Qh5#

This anticipates 118248(1967)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XS(C)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);P_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);N_SPINP(c),OGATEB,P-FLIGHT,XS(C)::QAR2(B)
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • P(d);N_SPINP(c),XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(B)
        • K(a);P-FLIGHT,P_SPINP(c)::QAR1(B)
      • Refutation
        • P(d);
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR2(B)
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(B)
      • P(c);SBLOCK,XS(C)::QAB(B)
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