MESON Chess Problem Database

Problem Display
PID: 159955 (7Q/p7/3pp3/4N3/K2k4/3p4/5b2/2BN3B w - - 0 1)

Andrew, Frederick William

Stratford Express, 1905

7Q/p7/3pp3/4N3/K2k4/3p4/5b2/2BN3B

#2

6 + 6

15351 SCPF/BCPS Black Books 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Be3#
    • 1...Be3
      • 2.Bxe3#
    • 1...Bg3
      • 2.Be3#
    • 1...Bh4
      • 2.Be3#
  • Tries
    • 1.Kb5?
      • threat
        • 2.Sc6#
        • 2.Bb2#
      • 1...dxe5
        • 2.Bb2#
        • 2.Qd8#
      • 1...Be1
        • 2.Sc6#
        • 2.Be3#
      • 1...d2
        • 2.Bb2#
      • 1...a6+!
    • 1.Sc6+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kc5!
    • 1.Sd7+?
      • 1...Kc4
        • 2.Sb2#
        • 2.Qc3#
      • 1...e5!
    • 1.Qh4+?
      • 1...Kc5
        • 2.Sd7#
        • 2.Qxf2#
        • 2.Qb4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Bxh4!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxd6#
      • 1...Kc5
        • 2.Qxf2#
      • 1...Kxe5
        • 2.Qf4#
      • 1...dxe5
        • 2.Qb4#
      • 1...d5
        • 2.Bb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::B(A)
    • B(a);N_GUARD::B(A),XB(a)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::B(A)
      • Refutation
        • P(f);CHECK
    • Try
      • S(E);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(E);CHECK
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAB1(F)
      • Refutation
        • B(a);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR2(F),XP(d)
    • Vars
      • K(c);P_SPINP(d),S_FLIGHT::QAB(F),XB(a)
      • K(c);S_FLIGHT,XS(E)::QAB1(F)
      • P(d);OGATE,SBLOCK,XS(E)::QAR2(F)
      • P(d);::B(A)
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