MESON Chess Problem Database

Problem Display
PID: 222618 (8/2R2B2/2p3Q1/K1kp4/8/3n1p2/5N2/6B1 w - - 0 1)

Flagg, John O

Nashville Daily American, 1884

8/2R2B2/2p3Q1/K1kp4/8/3n1p2/5N2/6B1

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Sxd3#
      • 2.Se4#
      • 2.Rxc6#
      • 2.Qxc6#
  • Tries
    • 1.Qxd3?
      • threat
        • 2.Se4#
        • 2.Qxd5#
      • 1...d4
        • 2.Se4#
        • 2.Qa3#
      • 1...Kd6!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qxd5#
      • 1...Kd6
        • 2.Qe7#
      • 1...dxe4
        • 2.Sxe4#
      • 1...Sb4
        • 2.Qxb4#
      • 1...Sf4
        • 2.Qb4#
      • 1...d4
        • 2.Rxc6#
        • 2.Qd5#
        • 2.Qxc6#
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);XS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);N_SPINP(e),P_SPINP(d),S_FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XP(d)
    • Vars
      • K(c);N_SPINP(e),S_FLIGHT::QAB1(D)
      • P(d);XQ(D)::B(A)+S(B),DCHECK,XP(d)
      • S(a);N_GUARD::QAB1(D),XS(a)
      • S(a);N_GUARD::QAB1(D)
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