MESON Chess Problem Database

Problem Display
PID: 206800 (8/4p3/1N2p1Bp/4k2K/1P1N4/8/5PQ1/8 w - - 0 1)

Shinkman, William Anthony

New York Clipper, 1870

8/4p3/1N2p1Bp/4k2K/1P1N4/8/5PQ1/8

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qe4#
      • 2.Qh2#
      • 2.Qg3#
  • Tries
    • 1.Sb5?
      • 1...Kf4
        • 2.Qe4#
        • 2.Qg3#
      • 1...Kf6!
    • 1.Sd7+?
      • 1...Kf4
        • 2.Se2#
        • 2.Sxe6#
        • 2.Qf3#
        • 2.Qe4#
        • 2.Qh2#
        • 2.Qg3#
        • 2.Qg4#
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxd4!
    • 1.Qf3?
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kd6!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Sb5#
      • 1...Kf6!
    • 1.Qc6?
      • 1...Kxd4
        • 2.Qc5#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf6!
    • 1.Qg3+?
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kf6!
    • 1.Qg5+?
      • 1...Kxd4
        • 2.Qe3#
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
      • 1...hxg5!
  • Keys
    • 1.Qa8!
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kd6
        • 2.Qb8#
      • 1...Kf6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB(B)
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::QAB(B)
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