MESON Chess Problem Database

Problem Display
PID: 208112 (8/8/2B3p1/2bn2q1/2N1k1p1/2Q2pR1/2K3P1/8 w - - 0 1)

Whiting, William W

Dubuque Chess Journal, 1874

8/8/2B3p1/2bn2q1/2N1k1p1/2Q2pR1/2K3P1/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qe5#
    • 1...Qe3
      • 2.Qe5#
    • 1...Qf4
      • 2.Qd3#
    • 1...Qh4
      • 2.Qe5#
    • 1...Qh6
      • 2.Qe5#
    • 1...Qd8
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
  • Tries
    • 1.Qxf3+?
      • 1...Kd4
        • 2.Qd3#
      • 1...gxf3!
  • Keys
    • 1.Rxg4+!
      • 1...Kf5
        • 2.Bd7#
      • 1...Qf4
        • 2.Qe5#
        • 2.Qd3#
      • 1...Qxg4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • K(b);N_SPINS(e),S_FLIGHT::QAR1(C)
    • Q(f);N_GUARD::QAR1(C)
    • Q(f);SBLOCK::QAB1(C)
    • Q(f);N_GUARD::QAR1(C),XQ(f)
  • Tries
    • Try
      • Q(C);CHECK,XP(a)
      • Vars
        • K(b);N_SPINS(e),P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • R(D);CHECK,XP(c)
    • Vars
      • K(b);N_SPINS(e),S_FLIGHT::B(F)
      • Q(f);XR(D)::QAR1(C)
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