MESON Chess Problem Database

Problem Display
PID: 207545 (8/4B3/8/4kpP1/3ppN2/7Q/7K/n2R4 w - - 0 1)

Martindale, Frank W

New York Clipper, 1872

8/4B3/8/4kpP1/3ppN2/7Q/7K/n2R4

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Qg3#
  • Tries
    • 1.Bf6+?
      • 1...Kxf4
        • 2.Rf1#
        • 2.Qg3#
      • 1...Kd6!
    • 1.Qa3?
      • threat
        • 2.Bd6#
        • 2.Qd6#
      • 1...Kxf4
        • 2.Qg3#
      • 1...d3
        • 2.Qd6#
      • 1...e3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qc7#
      • 1...Kxf4
        • 2.Qg3#
      • 1...dxc3
        • 2.Bd6#
      • 1...e3
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
        • P(b);::QAB1(C)
      • Refutation
        • P(c);
  • Actual
    • Q(C);P_PINP(b)
    • Threat
      • QAB(C)
    • Vars
      • K(d);N_SPINP(b),OGATEB,S_FLIGHT,XS(D)::QAB1(C)
      • P(b);N_SPINP(b),XQ(C)::B(F)
      • P(c);::QAB1(C),XP(b)
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