MESON Chess Problem Database

Problem Display
PID: 194936 (QRn5/1P2p1K1/1N1k4/8/3p4/1B6/8/2R5 w - - 0 1)

Shinkman, William Anthony

Wurzburg, Otto

Pittsburgh Gazette-Times, 1918

QRn5/1P2p1K1/1N1k4/8/3p4/1B6/8/2R5

#2

7 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qa3#
      • 2.bxc8S#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qc5#
        • 2.Qd5#
        • 2.bxc8S#
      • 1...e5
        • 2.Qb4#
        • 2.Qa3#
        • 2.Qc5#
        • 2.bxc8S#
      • 1...e6
        • 2.Qc5#
        • 2.bxc8S#
      • 1...Sa7
        • 2.Rd8#
        • 2.Qc5#
        • 2.Qd5#
      • 1...Sxb6!
    • 1.bxc8Q?
      • threat
        • 2.Sc4#
        • 2.Qd5#
        • 2.Qe6#
        • 2.Qc5#
        • 2.Qc7#
      • 1...e6
        • 2.Qxe6#
        • 2.Qc5#
        • 2.Qc7#
      • 1...e5
        • 2.Qe6#
        • 2.Qd7#
        • 2.Qa3#
        • 2.Qc5#
        • 2.Qc7#
        • 2.Qd8#
        • 2.Qf8#
      • 1...Ke5!
  • Keys
    • 1.Sc4+!
      • 1...Kc5
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Kd5
        • 2.bxc8Q#
      • 1...Kc6
        • 2.bxc8Q#
      • 1...Ke6
        • 2.bxc8Q#
        • 2.bxc8B#
      • 1...Kc7
        • 2.bxc8Q#
      • 1...Kd7
        • 2.bxc8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Refutation
        • S(d);XS(C)
    • Try
      • P(D);XS(d)
      • Threat
        • DUALS(5)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(C);CHECK
    • Vars
      • K(b);S_FLIGHT::PXS(d)=Q
      • K(b);P-FLIGHT::PXS(d)=Q
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